Fire alarm design, installation, commissioning, servicing and HMO Grade-A upgrades across all 32 London boroughs. BS 5839-1 for blocks, commercial and care premises; BS 5839-6 for HMOs and rented homes. Built for HMO landlords, RTM and freeholder boards on Victorian conversions, period blocks and modern stock, ready for council, CQC and insurer review.
Most of our fire alarm enquiries start with one of six triggers, from a Fire Risk Assessment demanding a Grade A upgrade to a detector that won’t stop chirping at 3am. Every trigger carries its own compliance deadline. We read the report, confirm the BS 5839 category your property needs, and close out the action in days, not months.
The Fire Risk Assessor has rated the existing system Priority 1 or 2, wrong Category for occupancy (e.g. L4 where L2 is required), no coverage of escape routes, missing heat detection in kitchens, or no interlink between flats and common parts.
The licensing schedule of works requires upgrade from Grade D interlinked alarms to a Grade A addressable panel with manual call points, cause-and-effect and BS 5839-1 commissioning, normally inside a 21 to 28-day window.
BS 5839-1 Clause 37 caps non-fire false alarms at one per 100 detectors per year. Above that the system fails, and the London Fire Brigade starts charging call-outs. Usually dust, wrong detector type, end-of-life optical cells or a crossed manual call point.
Optical smoke detectors have a 10-year rated life; heat detectors 15 years. Many early 2010s panels are now declared obsolete by the manufacturer, no spares, no firmware, no third-party support. Servicing engineers issue a “system at risk” note.
Building Control sign-off, Approved Document B (Vol 1 & 2) and a BS 5839 commissioning certificate are prerequisites for handover. Most cause-and-effect failures at practical completion come from missing ancillary outputs (hold-open magnets, AOVs, lift recall).
Insurer re-inspection flags a missing 6-monthly service, unlogged weekly tests, or an undocumented cause-and-effect. Higher Risk Buildings under the Building Safety Act 2022 Section 156 now require golden-thread-ready fire alarm documentation.
Pick your property type below. We’ll show you the BS 5839 Grade, Category, typical device count, commissioning certificates and an indicative cost band, pulled from real fire alarm designs we’ve issued across London in the last 12 months.
Indicative cost bands are calibrated on a baseline of £200–£450 per detection device applied to the lower-coverage scenario for each property type, plus a realistic commissioning floor that covers site survey, mains-spur first-fix, function testing, BS 5839 commissioning certificate and log-book setup. Panel and ancillary outputs added where Grade A applies. The single-let band assumes a 2-storey rented dwelling at LD3 statutory minimum (Smoke & CO Regs 2022); LD2 with kitchen heat detection is the rented best-practice tier shown alongside. Note on the licensing pathways: selective licensing (Housing Act 2004 Part 3) covers non-HMO single-family lets in designated areas; HMOs of any size sit under Part 2 (mandatory licensing for 5+ persons in 2+ households, or additional licensing for smaller HMOs in designated areas) and follow the LACORS-aligned HMO pathway above. Final price varies on actual device count, the FRA category determination, wiring containment (surface-trunked or fully concealed in capping or chase), access conditions, working-hours restrictions and any cause-and-effect programming. Treat the figures as a provisional spec; the on-site survey confirms the final design and a fixed-price quote.
The national LACORS Housing and Fire Safety guidance is the de-facto reference for HMO licensing fire-alarm decisions in England. Pick the two variables below and we’ll show the Grade, Category and typical device set most boroughs’ licensing teams will expect. Your FRA designer confirms the final specification.
Most fire alarm companies sell one or two of these services and subcontract the rest. We design, install, commission, service, remediate, diagnose false alarms and upgrade Grades, entirely in-house, on a single BS 5839 certificate and log book. That’s the point of difference a Fire Risk Assessor, council licensing officer or insurer looks for when they review your paperwork.
BAFE SP203-1 aligned design by a competent person. We set Grade (A, B, C, D1, D2), Category (L1-L5, P1-P2, M) and cause-and-effect from your Fire Risk Assessment, fire strategy and occupancy profile, before a single cable is pulled.
NICEIC-registered installation by DBS-checked engineers. Every system hands over with a full BS 5839 commissioning pack: Design, Install, Commission and Verify certificates, zone chart, cause-and-effect test results and log book.
BS 5839-1 Cl.45 requires inspection & test by a competent person every six months. BS 5839-6 requires annual service of Grade A/B/C. Miss the interval → insurance invalid, RRO 2005 breach. We run the regime and store the digital log.
Licensing schedules and FRA action plans frequently demand uplift from Grade D interlinked smoke alarms to a Grade A addressable system. Typically one-to-two days on-site, phased to keep rooms lettable. LACORS-aligned.
BS 5839-1 Cl. 37 caps non-fire false alarms at one per 100 detectors per year. We diagnose, swap, reprogram and re-train, stopping London Fire Brigade call-out charges and the tenant-tampering spiral.
The gap between fire alarm companies that only install and those that only service is where most compliance disasters hide: a mis-spec at design stage locks in false alarms for a decade. We sit on both sides of that line, and integrate with fire doors, emergency lighting and EICR under the same project manager.
The grade decision a London Responsible Person makes when scoping a fire alarm: a designed, panel-based Grade A system to BS 5839-1, or a domestic-style interlinked Grade D system to BS 5839-6. The grade is set by the Fire Risk Assessment, the property type and the LACORS Housing, Fire Safety 2008 guidance. The full side-by-side below cites the originating standard or guidance for every row, with the source links beneath the table.
| Attribute | Grade A (BS 5839-1:2017) | Grade D1 / D2 (BS 5839-6:2019+A1:2020) |
|---|---|---|
| Typical application (LACORS 2008 risk matrix) | Commercial, larger HMOs (3+ storeys or higher complexity), care homes, sleeping-risk premises, residential blocks | Small HMOs (1–2 storeys, up to 6 occupants, simple layout), single-let private rented, social housing |
| Control & Indicating Equipment (BS 5839-1 Cl. 12 / BS 5839-6 Cl. 9) | Dedicated CIE panel with zoning, event log and cause-and-effect programming | No separate panel; the alarm logic and sounder sit inside each detector head |
| Power supply (BS 5839-1 Cl. 25 / BS 5839-6 Cl. 15) | 230V mains primary with a dedicated standby battery sized for 24h quiescent plus 30min alarm | 230V mains with sealed tamper-proof battery backup (Grade D1) or user-replaceable battery (Grade D2) |
| Manual call points (BS 5839-1 Cl. 20.2) | Yes. At every final exit and at storey exits leading to a final exit | None. Grade D is detection-only by design |
| Sounders and coverage (BS 5839-1 Cl. 16-18) | Dedicated sounders; minimum 65 dB(A) in occupied areas, 75 dB(A) at the bedhead in sleeping risk | Sounder integrated in each interlinked detector head |
| Cause-and-effect logic (BS 5839-1 Cl. 13, 23) | Yes. Programmable ancillary outputs to door magnets, AOVs, lift recall, phased / progressive horizontal evacuation | Simple interlink only. One detector activates, all sound; no programmable outputs |
| Category coverage (BS 5839-1 Cl. 6 / BS 5839-6 Cl. 6) | L1, L2, L3, L4, L5 (life), P1, P2 (property), M (manual) | LD1, LD2, LD3 (domestic life-protection equivalents) |
| Periodic inspection & servicing (BS 5839-1 Cl. 45 / BS 5839-6 Cl. 25) | Six-monthly competent-person inspection (BS 5839-1 recommends an interval not exceeding six months) | Annual competent-person service is recommended for Grade A, B, C systems under BS 5839-6 Sec 25; Grade D / E / F rely on the user’s routine weekly checks plus a periodic competent-person review |
| Typical install time (indicative, HSE projects) | 1–5 days, depending on zone count and tenant access | 3–5 hours per dwelling, single visit |
| Indicative install cost (HSE 2025-26 London projects, ex VAT, fixed for 30 days) | £1,200–£18,000+, depending on zone count, devices, programming and access | £450–£950 per dwelling for a 4–6 device interlinked install |
| Commissioning evidence (BS 5839-1 Cl. 41-44 / BS 5839-6 Cl. 24) | BS 5839-1 Design, Install, Commission and Verify (DICV) certificate set, plus zone plan, cause-and-effect matrix and log book | BS 5839-6 commissioning certificate, device schedule and log book |
| LACORS HMO position (LACORS 2008, sections 12-14) | Recommended for 3+ storey HMOs, HMOs with 5+ occupants, HMOs with shared protected escape routes, and any layout the FRA classifies as higher complexity | Sufficient for 2-storey HMOs up to 6 occupants with simple layout, where the LACORS risk matrix returns a lower-complexity grading |
Indicative reference only. The grade, category and design of any fire alarm system must be specified by a competent person against the property’s Fire Risk Assessment. Cost and timing ranges reflect HSE 2025-26 London projects, exclude VAT and builder’s work, and are fixed for 30 days from quote. Statutory citations are to the originating clause; the operative duty sits with the Responsible Person under the Fire Safety Order 2005.
Every Grade A installation brings together the same eight components in the same architecture. Each element has a standard it’s tested to, a rated life, and a place in the commissioning pack. This is what “designed by a competent person” actually looks like.
Every range below is drawn from real HSE Property Checks fire alarm projects across London and the Home Counties in the last 12 months. Ranges are indicative, final figures are always fixed-price after our site survey (no charge for the visit), which verifies zone count, device count, cable routing, access and product specification.
| Fire alarm service | Standard | Price range | What’s included |
|---|---|---|---|
| Servicing & periodic testing | |||
| 6-monthly BS 5839-1 inspection & test per visit, commercial / large HMO |
BS 5839-1 Cl.45 | £95–£350 | Competent-person inspection, rotating detector function-test sample, battery & standby capacity test, cause-and-effect verification, digital log. |
| Annual BS 5839-6 domestic service per visit, HMO / rented dwelling |
BS 5839-6 Cl.25 | £55–£120 | Grade A/B/C full service or Grade D function test, battery check, interlink verification, cert & log entry. |
| Weekly-test training & digital log setup one-off, per property / block |
BS 5839-1 Cl.44.2 | £120–£250 | On-site training with Responsible Person & caretaker, laminated zone chart at CIE, digital log book setup, reminder-schedule automation. |
| HMO upgrades & FRA-driven remedial works | |||
| Grade D → Grade A HMO upgrade typical 4–6 bed HMO, occupied |
LACORS · BS 5839-1 | £1,800–£5,500 | Full panel install, addressable detection, manual call points, sounder coverage, cause-and-effect for door hold-open, LACORS compliance letter. |
| Panel replacement / end-of-life swap existing loop wiring retained where possible |
BS 5839-1 Cl.45.4 | £1,450–£8,500 | Panel swap-over, detector head rotation, firmware update, re-commissioning, existing cable integrity test, new DICV cert. |
| Category top-up (L4 → L2/L3) per added device, installed & programmed |
BS 5839-1 | £145–£285 / device | Additional optical / heat / multi-sensor detectors, re-programmed into existing zones, FRA-aligned re-categorisation cert. |
| Cause-and-effect re-programming addressable system, per zone/output |
BS 5839-1 Cl.23 | £200–£650 | Logic re-mapped for revised fire strategy, ancillary outputs re-linked (magnets, AOV, lifts), full C&E matrix test & sign-off. |
| False alarm diagnosis & fault finding | |||
| False alarm investigation & report symptom triage + on-site test |
BS 5839-1 Cl.37 | £95–£250 | Event-log download, symptom picker, ear-level acoustic test, detector-head sampling, written root-cause report with remedial options. |
| Detector head swap / clean per detector, optical → multi-sensor |
BS 5839-1 Cl.37 | £35–£85 | Like-for-like swap or optical → multi-sensor upgrade where cooking nuisance, clean/test, re-commission into address. |
| End-of-life detector rotation per property or block, 10yr optical / 15yr heat |
BS 5839-1 Cl.45.4 | £45–£95 / device | Planned rolling replacement of expired detection heads, new cert, updated device schedule, manufacturer certificate-of-conformity evidence. |
| LFB charge-notice investigation after repeat unwanted attendance |
LFB FA protocol | £250–£950 | Incident analysis against London Fire Brigade charging policy, delayed-alarm / investigation-time re-programming, tenant education pack, evidence letter to LFB. |
| Design & installation: BS 5839-1 & BS 5839-6 | |||
| BS 5839 design & category determination competent-person fire strategy, zone plan, cause & effect |
BS 5839-1 Cl.6 · BAFE SP203-1 | £350–£1,800 | Fire strategy review, Grade & Category determination, zone plan, device schedule, cause-and-effect matrix, sound-pressure calc, BAFE-aligned design cert. |
| Grade D1 LD2 interlinked HMO system small HMO, up to 6 mains+battery alarms installed |
BS 5839-6 · LACORS | £450–£950 | Mains-powered optical smoke & heat detectors, sealed tamper-proof battery, interlinked, commissioned, BS 5839-6 cert, weekly-test briefing. |
| Grade A small HMO 3–5 persons, 2-storey, 1–2 zones, up to 8 devices |
BS 5839-1 · LACORS | £1,450–£2,450 | Addressable panel, optical/heat detection, manual call points at final exits, sounders to 75 dB bedhead, DICV certs, log book. |
| Grade A large HMO / 3-storey HMO 6+ persons, 3-storey, 1–2 zones, sole-escape stair |
BS 5839-1 · LACORS | £2,400–£5,500 | Addressable panel, smoke detectors to every habitable room, MCPs at final exits, escape-route zoning, sounders to 75 dB bedhead, DICV certs. |
| Grade A medium commercial 3–8 zones, full addressable system, cause & effect |
BS 5839-1 · BAFE SP203-1 | £3,500–£12,000 | Multi-zone addressable system, cause-and-effect programming, sounder & visual-alert coverage, ancillary outputs, full commissioning pack. |
| Grade A large commercial / HRB system 9+ zones, complex cause-and-effect, golden thread |
BS 5839-1 · BSA 2022 s.156 | £12,000–£45,000+ | Enterprise addressable panel, phased/PHE evacuation logic, AOV & lift-recall interfaces, Safety Case-ready documentation. |
| Category L1 care-home system detection in every room incl. voids, PHE strategy |
BS 5839-1 · CQC Reg 12 | £4,500–£35,000 | L1 coverage, door hold-open magnets, visual-alert strobes for hearing-impaired, PEEPs-aligned sensitivities, CQC evidence pack. |
Ranges are indicative. Your fixed-price quote is issued after a site survey (no charge for the visit; cost credited against any contract awarded). Ranges exclude builder’s work, complex access, bespoke cause-and-effect and volume discounts; all are fully captured in the quote. Volume discounts at 10+/25+/50+ units.
Need doors, EL or EICR too? See the integrated remedial pricing →
The biggest cause of insurance-voided fire-alarm systems in London is not a design failure, it’s a missed test interval. BS 5839-1 and BS 5839-6 set a sequence of weekly, monthly, 6-monthly and annual duties. Miss any one and the certificate chain breaks. Here is the full schedule, and exactly who is responsible at each step.
A different manual call point pressed each week, sounders confirmed, result logged. Takes under 2 minutes; legally required under BS 5839-1 Cl. 44.2 for non-domestic systems.
BS 5839-1 Cl. 44.2Where fitted, secondary power source is function-tested monthly. Battery standby-capacity visual check. Event log reviewed for faults.
BS 5839-1 Cl. 44.3BS 5839-1 Cl. 45 service at intervals not exceeding six months. Rotating sample of detectors function-tested, battery capacity verified, event log reviewed, false-alarm rate checked against the Cl. 37 cap.
BS 5839-1 Cl. 45For HMO and domestic Grade A/B/C systems. Every detector function-tested, interlink verified, battery capacity measured, new annual certificate issued.
BS 5839-6 Cl. 25Standby sealed lead-acid batteries in the CIE panel typically reach end-of-life at 30–48 months and must be replaced before capacity falls below the 24h-quiescent + 30-min-alarm duty.
Manufacturer & BS 5839-1Optical smoke detectors reach rated end-of-life at 10 years. Heat detectors 15 years. Multi-sensor devices per manufacturer. Planned rotation avoids a detection blackout and a failed 6-monthly.
BS 5839-1 Cl. 45.4Typical panel end-of-life: 15–20 years. Firmware, spares and manufacturer support are usually withdrawn before then. Plan phased swap-over well before an FRA flags the system “at risk”.
Capital-plan itemEnter the date of your last BS 5839 service, we’ll tell you when the next inspection is due and whether you’re currently compliant.
BS 5839-1:2017 Cl. 45 (6 months max) · BS 5839-6:2019+A1:2020 Cl. 25 (annual). Dates assume a competent-person service was actually carried out on the date entered.
BS 5839-1 Section 7 sets a widely-cited performance target of no more than one non-fire false alarm per 100 detectors per year. Exceed it and you invite London Fire Brigade charge notices, tenants who silence the system, and eventually an FRA finding that downrates the whole installation. Most persistent false alarms trace back to one of eight fixable factors, pick the symptom below to see the likely cause and the fix route.
Only one answer needed, you can switch at any time.
Pick a symptom above, you’ll get the likely cause, fix route, indicative cost and urgency in under 30 seconds.
Every fire alarm we design, install, service or upgrade follows the same eight-step BS 5839 checklist, aligned with BS 5839-1:2017 Clauses 6, 39–41 and 43, BS 5839-6:2019+A1:2020 and BAFE SP203-1. It’s why FRA assessors, councils, CQC inspectors and insurers accept our completion packs at first submission.
FRA review and competent-person sign-off on Grade and Category in line with BS 5839-1 Cl. 6 (or BS 5839-6 Cl. 6). Evacuation strategy fixed: simultaneous, phased or progressive horizontal.
On-site visit captures detector layout, zone boundaries, ceiling heights, voids, cable routing and CIE panel location. Sound-pressure calc sets sounder positions.
BAFE-aligned design certificate, device schedule, cause-and-effect matrix and product certificate-of-conformity evidence, issued with a fixed-price quote and signed off by the Responsible Person.
BS 6387 CWZ enhanced fire-resistant cable where required, DBS-checked operatives, dust-contained works, tenant-aware scheduling on occupied HMOs, blocks and care settings.
100% device function-test of every detector, manual call point and sounder. Ear-level sound-pressure measured in sleeping areas. Zone integrity and earth continuity verified.
Logic table validated end-to-end against the design matrix: door hold-open magnets, AOVs, lift recall and any phased-evacuation sequences confirmed live on site.
Standby battery sized and proven to BS 5839-1 Cl. 25: 24-hour quiescent followed by 30-minute alarm load, recorded with date-stamped result on the panel battery.
Face-to-face weekly-user-test training, populated BS 5839 log book, laminated zone chart at the panel, and the DICV certificate set issued in a submission-ready completion pack with 12-month workmanship warranty.
Councils, HMO licensing officers, FRA assessors, CQC inspectors and insurers each expect different evidence. Our BS 5839 commissioning pack bundles the right evidence for each into a single submission-ready binder for the Responsible Person.
The four BS 5839-1 Cl. 43 certificates every insurer and licensing officer expects: Design, Install, Commission and Verify, each signed by the competent person responsible for that stage.
Marked-up plan showing every zone, detector, manual call point, sounder and ancillary output. Laminated copy stays at the CIE panel; digital copy in the pack.
The verified logic table that tells the panel what to do when each input fires. Critical evidence for phased evacuation strategies and care-home installs.
Function-test record, ear-level sound-pressure readings, battery standby-capacity test and false-alarm baseline, all to BS 5839-1 commissioning specification.
EN 54-x certificates and manufacturer data sheets for every device. Required for Building Safety Act Section 156 golden-thread documentation on Higher Risk Buildings.
Populated BS 5839 log book with weekly-test schedule and a face-to-face handover sign-off from the Responsible Person. Sets the routine-testing clock running cleanly.
Click any borough to see the number of projects delivered in and around it. Counts accumulate direct and adjoining-borough work from a recent 100-project cohort.
4 out of last 100 projects completed in and around Barking & Dagenham postcodes: IG11.
8 out of last 100 projects completed in and around Barnet postcodes: NW4, EN5.
6 out of last 100 projects completed in and around Bexley postcodes: DA5.
16 out of last 100 projects completed in and around Brent postcodes, within our all-32-borough London service area.
9 out of last 100 projects completed in and around Bromley postcodes: BR1, BR3, SE20.
22 out of last 100 projects completed in and around Camden postcodes: NW1, NW5.
45 out of last 100 projects completed in and around City of London postcodes: EC4.
7 out of last 100 projects completed in and around Croydon postcodes: CR0.
6 out of last 100 projects completed in and around Ealing postcodes, within our all-32-borough London service area.
5 out of last 100 projects completed in and around Enfield postcodes: EN3.
18 out of last 100 projects completed in and around Greenwich postcodes: SE3.
17 out of last 100 projects completed in and around Hackney postcodes: E9.
11 out of last 100 projects completed in and around Hammersmith & Fulham postcodes: SW6, W12.
13 out of last 100 projects completed in and around Haringey postcodes: N4.
6 out of last 100 projects completed in and around Harrow postcodes: HA1.
3 out of last 100 projects completed in and around Havering postcodes, within our all-32-borough London service area.
4 out of last 100 projects completed in and around Hillingdon postcodes: UB4, UB5.
7 out of last 100 projects completed in and around Hounslow postcodes: TW3.
12 out of last 100 projects completed in and around Islington postcodes: N1.
18 out of last 100 projects completed in and around Kensington & Chelsea postcodes, within our all-32-borough London service area.
2 out of last 100 projects completed in and around Kingston upon Thames postcodes, within our all-32-borough London service area.
36 out of last 100 projects completed in and around Lambeth postcodes: SW4.
24 out of last 100 projects completed in and around Lewisham postcodes: SE13, SE23.
8 out of last 100 projects completed in and around Merton postcodes, within our all-32-borough London service area.
17 out of last 100 projects completed in and around Newham postcodes: E16.
4 out of last 100 projects completed in and around Redbridge postcodes: IG8.
11 out of last 100 projects completed in and around Richmond upon Thames postcodes: TW2, TW11.
31 out of last 100 projects completed in and around Southwark postcodes: SE1, SE15, SE17, SE22.
1 out of last 100 projects completed in and around Sutton postcodes, within our all-32-borough London service area.
33 out of last 100 projects completed in and around Tower Hamlets postcodes: E1, E2, E14.
7 out of last 100 projects completed in and around Waltham Forest postcodes, within our all-32-borough London service area.
11 out of last 100 projects completed in and around Wandsworth postcodes: SW11, SW17, SW18.
22 out of last 100 projects completed in and around Westminster postcodes: W1, W2, SW1, NW8, WC2.
Based on our last 100 invoiced projects across London. “In and around” counts accumulate direct-borough work plus work in adjoining boroughs. Numbers reflect this cohort, our full 6-month delivery extends beyond it.
Each started with a specific fire-alarm problem, a failed FRA upgrade demand, a runaway false-alarm count, or a CQC premises-safety finding. Names and addresses anonymised; everything else is drawn from the actual commissioning pack.
A seven-bedroom HMO in Leytonstone failed its licensing renewal. Existing Grade D mains-only smoke alarms weren’t interlinked, no MCPs, no heat detector in the shared kitchen. Licensing team demanded Grade A Category LD2 with a dedicated panel, sounder cover to 75 dB bedhead and cause-and-effect on the kitchen door electromagnet, closed out in 28 days with tenants in residence.
Two-day survey-to-design; eight-device addressable panel installed in the utility cupboard; optical detectors to every room used for escape, heat detector in the shared kitchen, MCPs at ground- and first-floor final exits, sounder at stair top/bottom. Cause-and-effect linking the kitchen-door magnet to any detector activation. Commissioning with 75/65 dB measurement at every bedhead, DICV certificate set issued. Two working days on site.
An 86-room student block had triggered 14 London Fire Brigade attendances in Q3 2025, well beyond the BS 5839-1 Clause 37 cap of one per 100 detectors per year. The LFB had issued charge notices; the insurer was threatening to withdraw cover; tenants had started propping open fire doors to stop re-entry after nuisance evacuations.
Event-log download identified 11 of the 14 activations traced to four optical detectors in kitchenettes (cooking nuisance) and two in laundry cupboards (dust). Swapped to multi-sensor and heat-only detectors respectively, re-programmed into the same addresses. Reprogrammed the delayed-alarm investigation-time logic on the panel (60 sec staff verification before general evacuation for the reception zone). Tenant education cards distributed. Result: zero unwanted LFB attendances in the following two quarters.
An 18-bed residential care home in Kilburn was running a Grade A Category L3 system, legal but below the CQC inspector’s expectation for a home with dementia residents and a progressive-horizontal-evacuation strategy. CQC agreed a 14-day action plan to upgrade to Category L1 with automatic door hold-open release linked to the panel.
Out-of-hours installation over eight shifts: detectors added to every resident room (optical), en-suites (heat), voids above ceilings and service risers; 12 door hold-open electromagnets cause-and-effected to the panel to release on activation of any detector in the adjacent zone; visual-alert strobes in the quiet lounges for hearing-impaired residents. PEEPs reviewed against new detector sensitivity; CQC Regulation 12 evidence pack delivered inside the 14-day window.
Every HSE fire alarm project has a named lead, the same person you meet at survey is the one who signs the DICV certificates, and the same face turns up to survey, deliver and close out. Accountability isn’t a line item on our contracts; it’s the contract.
Twenty years in fire and HMO compliance across the London private rented sector, blocks and care-home portfolios. Personally responsible for every fire alarm scope issued by HSE Property Checks.
Fifteen years installing certified doorsets across London residential, commercial and HRB projects. Personally responsible for installation conformity and on-site quality control on every door remedial.
Fire alarm design, install, commission and BS 5839-1 cl. 45 servicing is delivered in-house under our NICEIC Approved Contractor registration, signed by Fernando Olivera as Qualifying Supervisor. All statutory certificates are issued under our own registrations, never subcontracted, never whitewashed. Each named engineer’s full profile is listed on our About page.
Cross-checked against Google, Bark and direct references from managing agents and care-home groups. Every review cites the fire alarm outcome, commissioning, service, upgrade or false-alarm fix.
“HSE was the only contractor who came in, surveyed every item on the Waltham Forest schedule and gave us one fixed quote. Licence renewed inside the deadline. We’ve since put two more HMOs through them.”
“11 Priority 1 items on a 42-flat block. Four weekends. No complaints. Completion pack went straight to our FRA assessor and he re-signed the report the same week. Excellent project managers.”
“Our CQC inspector identified premises-safety issues and we had 14 days to evidence action. HSE worked shifts around our residents, 15 dementia-friendly doors, wayfinding, compartmentation. CQC took the pack without challenge.”
“I had an unsatisfactory EICR with six C2 items and a looming tenant move-in. Kevin’s team triaged the report same day, remediated in five working days, issued a clean new EIC. Tenants moved in as planned.”
“We had quotes from two fire contractors and an electrician. HSE came in 18% cheaper combined, with one project manager for all three. The finance team specifically asked to use them again.”
“The completion pack is the thing. Every certificate, every photo, mapped to every item on the council’s schedule. Our licensing officer said it was the tidiest submission he’d had all year.”
A properly commissioned fire alarm sits inside a wider compliance framework, emergency lighting, fire doors, electrical testing and HMO / HHSRS controls. Most of our clients start with a single alarm brief and stay for the full stack. Every service below is delivered by the same project team, on the same completion pack.
Type 1–4 FRAs for blocks, HMOs, care settings & commercial. Most of our alarm work starts from an FRA action plan.
See the FRA service →BS 5266-1 design, install & commission. Tied into the alarm panel where cause-and-effect demands it.
See the EL service →FDIS-compliant inspection to BS 8214 / BS 476-22. Your alarm programme frequently flags door hold-open and self-closer issues, we inspect, remediate, certify.
See the inspection service →FD30S & FD60S doorset supply and fit. For alarm cause-and-effect with hold-open magnets we deliver doors and electromagnets as a single package.
See the installation service →Quarterly and 6-monthly maintenance programmes synced with BS 5839 6-monthly service visits: one visit, two trades, one log entry.
See the maintenance service →End-to-end remediation covering fire door, alarm, EL, EICR and HMO defects on one completion pack. The home for multi-discipline FRA action plans.
See remedial works →Bundled design, install, commissioning and servicing contracts for landlords, HMOs, blocks and care. Best value across an alarm portfolio.
See package pricing →End-to-end HMO licensing & LACORS compliance. Pre-licensing audits, Grade A alarm upgrade schedules and renewals.
See HMO compliance →The twelve questions landlords, managing agents and care operators ask us most often. Bookmark this page, it’s the reference we send new clients before a survey.
The required fire alarm Grade (A, B, C, D1, D2, E or F) and Category (L1–L5, M, P1, P2) is determined by the property type, occupancy and fire strategy set in your Fire Risk Assessment. In outline: large HMOs (5+ persons, 2+ storeys), purpose-built flats with shared escape routes, care homes, sleeping-risk premises and most commercial buildings typically require Grade A with L2 or LD2 coverage under BS 5839-1 or BS 5839-6. Small HMOs (1–2 storeys) often require Grade D1 LD2 interlinked mains-plus-battery alarms. The specifier must be a competent person (BAFE SP203-1, NICEIC FESS, IFE, IFSM). Our System Selector gives a provisional recommendation in 60 seconds; our BS 5839 fire safety design service issues a formal category determination.
BS 5839-1:2017 (non-domestic systems) requires a competent person to inspect and service every fire alarm system at intervals not exceeding six months, so at least twice a year. BS 5839-6:2019+A1:2020 (domestic / HMO systems) requires annual servicing of Grade A, B and C systems and periodic function-test and battery checks on Grade D, E and F systems. The Responsible Person must also carry out a weekly user test (pressing a different manual call point each week) and keep a log book. Missing the statutory interval invalidates insurance and creates personal liability under the Regulatory Reform (Fire Safety) Order 2005. See the Service Intervals section below for BS 5839 statutory service timing.
Grade A (BS 5839-1) is a professionally-designed, fully addressable or conventional system with a separate Control & Indicating Equipment (CIE) panel, power supply, zoning, manual call points and sounders, required for commercial, large HMOs, care homes and sleeping risk. Grade B is similar with a simpler control unit. Grade C uses system-powered detectors with a dedicated power supply. Grade D1 (mains + sealed tamper-proof battery backup) and D2 (mains + replaceable battery) are interlinked domestic-style alarms used in most smaller HMOs and rented homes. Grade E (mains only) and Grade F (battery only) are now rarely specified for rented/HMO use. The correct grade for your property is set by the FRA designer.
Category L systems protect Life; Category P systems protect Property; Category M is a Manual-only system with call points but no automatic detection. L1 covers all areas including voids (maximum life protection). L2 covers escape routes plus rooms adjoining them and rooms with high fire risk. L3 covers escape routes and rooms adjoining them. L4 covers escape routes only. L5 is a localised or bespoke life-safety design. P1 covers all areas for property protection; P2 covers defined high-risk areas only. Most HMOs are L2 or LD2 (domestic equivalent); most commercial buildings are L2 or L3; care homes are typically L1.
The answer depends on storey count, occupancy and the FRA fire strategy, underpinned by the national LACORS Housing , Fire Safety guidance. In outline: small 2-storey HMOs with up to 6 occupants usually require Grade D1 LD2 interlinked mains smoke alarms with a heat detector in the kitchen. Larger 3-storey HMOs and HMOs with 5+ occupants usually require Grade A LD2 or L2 addressable systems with a separate panel, manual call points and sounders. Licensed HMOs in certain London boroughs (Southwark, Newham, Tower Hamlets, Hackney and others) often apply stricter local standards. We run a LACORS matrix walkthrough on the System Selector, and our HMO compliance team handles the licensing schedule of works end-to-end. Deeper read: BS 5839 fire alarm grades for HMOs decoded.
Costs are always survey-verified; typical ranges from our 2025–2026 London projects are: Grade D1 LD2 interlinked HMO system (up to 6 alarms, supplied & installed) £450–£950. Grade A small HMO / commercial system (1–2 zones, up to 8 devices) £1,200–£3,500. Grade A medium commercial (3–8 zones, addressable) £3,500–£12,000. Annual BS 5839-1 service £95–£350 per visit. BS 5839-6 domestic annual service £55–£120. Grade D to Grade A HMO upgrade £1,800–£5,500. All ranges are indicative only and exclude builder’s work, complex access and bespoke cause-and-effect programming. We issue a fixed-price quote after a site survey (no charge for the visit).
Persistent false alarms are almost always caused by one of eight fixable factors: dust ingress on optical smoke detectors, cooking fumes reaching a ceiling detector, steam from bathrooms, insect contamination, detector end-of-life (optical detectors have a 10-year life; heat detectors 15 years), faulty or reversed wiring, wrong detector type for the location (e.g. optical instead of heat in a kitchen), or a fault on a manual call point. BS 5839-1 Clause 37 caps non-fire false alarms at one per 100 detectors per year. Our False Alarm Diagnoser walks through the symptom picker and recommends a remedial route; our false-alarm investigation survey is £95–£250 fixed.
We triage your Fire Risk Assessment action plan within 2 hours, book a fixed-price survey within 48 hours and issue a line-by-line fire alarm scope of works within 5 working days, cross-referenced to each FRA finding. Most HMO Grade D-to-Grade A upgrades complete in one to two days per property; small commercial Grade A installs typically complete in three to five days. All fire alarm works integrate with our fire door, emergency lighting and EICR remedial teams under a single BS 5839 commissioning certificate and completion pack, ready for council, licensing and insurer inspection.
Fire alarm design, installation, commissioning and maintenance should be carried out by a competent person. Formal third-party certification schemes recognised by government and insurers include BAFE SP203-1 (Fire Detection & Fire Alarm Systems), NICEIC FESS, NSI NACOSS Gold, LPCB and FIA membership. Commissioning Grade A systems also requires BS 5839-1 Clause 43 Design, Install, Commission and Verify certificates, plus a zone plan, cause-and-effect schedule and log book. The Regulatory Reform (Fire Safety) Order 2005 places the legal duty on the Responsible Person to ensure a competent specifier is used.
Yes, single-contractor integrated delivery is our core differentiator. Most fire alarm companies subcontract or only cover alarms. HSE Property Checks designs fire alarms, emergency lighting, fire doors, EICR electrical and remedial works and HMO / HHSRS remedial under one project manager, one completion pack and one invoice. A typical FRA will flag defects across all four disciplines; delivering them separately extends your exposure window under the 28-day EICR rule, FRA Priority 1 deadlines and Building Safety Act Section 156. The annual compliance package bundles all four disciplines into a single managed cycle. Deeper read: Building Safety Act s.156 for higher-risk buildings.
Yes. Care homes, supported living and nursing homes typically require Grade A Category L1 fire detection to BS 5839-1, with addressable detection in every room including voids, combined with CQC Regulation 12 (safe care and treatment) and Regulation 15 (premises and equipment) documentation. Our fire alarm design integrates evacuation strategy (Simultaneous vs Progressive Horizontal Evacuation), PEEPs documentation, resident-specific detector sensitivity and automatic door hold-open release linked to the CIE panel. Installations, uplifts and servicing all include a CQC-ready evidence pack.
We respond within 2 hours. Fixed-price site survey on site within 48 hours. BAFE-aligned design pack and cause-and-effect matrix within 5 working days. Every installation closes with BS 5839 Design, Install, Commission and Verify certificates, a zone plan and a log book, ready for council, CQC, FRA and insurer review.