01 · Why it mattersWhy the compliance file carries half of a sale
Selling a BTL, HMO or investment block in London is not a conveyancing transaction, it is a compliance transaction. The Land Registry side of the deal is relatively simple; what slows completion is the pack that evidences every statutory duty the seller has been discharging since they bought the property. The buyer's solicitor interrogates that pack, and their client price-checks it. A tidy file completes in 6-10 weeks; a messy file lands in a 16+ week chain with a price-chip.
The 17 documents below are the composite pack that HSE compiles for every client selling a London PRS property. Not every document engages on every sale, a single-let family flat skips the HMO licence and some of the fire-safety pack; a commercial freeholder skips some of the tenancy documents. But the superset is the reference, and the solicitor on the other side of the deal has the same list in their standard TA6 enquiry bundle.
Organised into four groups that mirror the four-group operating model used in the 17 statutory duties checklist: Compliance Certificates (fire, gas, electrical, energy), HMO & Hazard (licences, FRA, HHSRS, asbestos, legionella), Tenancy Paperwork (agreements, deposit protection, Right-to-Rent records), and Title & Ownership (registry, planning history, insurance).
Context first: Renters' Rights Act landlord portal
Once the Renters' Rights Act 2025 landlord-portal provisions commence (phased through 2026-27), the compliance data on a rental property will be publicly visible on a national register. That does not replace the pre-sale compliance file, a conveyancer still wants original certificates, but it does mean incomplete compliance history is legible to every prospective buyer, broker and lender before they make an offer. Tidy now, avoid discounting later.
02 · Compliance certificatesGroup A · the eight compliance certificates (1-8)
The compliance certificates are the most time-sensitive part of the pack because their validity periods are short and expiry during the sale process is common. Any certificate expiring in the 90 days either side of expected exchange should be refreshed before the pack is lodged with the solicitor.
1 · Gas Safety Certificate (CP12)
AnnualIssued by a Gas Safe-registered engineer under the Gas Safety (Installation and Use) Regulations 1998. Covers every gas appliance on the property. Validity: 12 months. At sale: Solicitor wants the current CP12 and the previous two years' certificates as a pattern-of-compliance record. If the current CP12 is within 60 days of expiry, refresh before pack lodgement. Replacement cost: £70-£120 per property.
2 · Electrical Installation Condition Report (EICR)
5-yearlySatisfactory EICR required under the Electrical Safety Standards in the Private Rented Sector (England) Regulations 2020. Must be signed by a competent electrician qualified to BS 7671 current edition. Validity: Five years (some HMO schemes require annual re-test). Any C1, C2 or FI observations must have matching remedial-completion certificates filed with the EICR. Replacement cost: £180-£400 per property.
3 · PAT test records
AnnualPortable Appliance Testing under Electricity at Work Regulations 1989 for every landlord-supplied appliance. Validity: Annual is the conservative default. Records retained as a register with each appliance test-dated. At sale: Pass the PAT register and stickers to the buyer so they can continue the cadence without a gap. Replacement cost: £80-£180 for a standard PRS appliance set.
4 · Fire Risk Assessment
12-month reviewWritten FRA required for any block common parts and any HMO under the Fire Safety Order 2005 (as amended by FSA 2021 and BSA 2022 s.156). Methodology: PAS 79-1 or BS 8674:2025. Validity: Reviewed within 12 months; full re-assessment every 2-5 years or on material change. Replacement cost: £300-£600 single-let, £400-£900 HMO, £1,200-£3,500 block. Link to the HSE Fire Risk Assessment.
5 · Fire Door Inspection report
Quarterly / annualRequired for 11 m+ buildings under Fire Safety (England) Regulations 2022 Regulation 10. Quarterly flat-entrance-door inspections; annual common-parts fire-door inspections. Methodology: BS 8214:2026. At sale: Solicitor wants the most recent 4 quarters of reports plus the current annual. See the Fire Doors guide. Replacement cost: £150-£400 per visit depending on door count.
6 · Fire alarm BS 5839 certificates
4-certificate packDesign, installation, commissioning and verification certificates for the fire-alarm system under BS 5839-6:2019+A1:2020 (domestic) or BS 5839-1 (Grade A). See the BS 5839 guide. At sale: All four certificates plus the most recent annual verification report. Replacement cost: £450-£1,200 for a fresh design/install on a Grade D1 HMO; more for Grade A.
7 · Emergency Lighting test records
Monthly / annualBS 5266-1:2025 and BS EN 1838. Monthly function test, annual 3-hour full-duration discharge test, log book maintained on site. At sale: Full log book plus current annual discharge certificate. Replacement cost: £180-£450 for an annual test on a typical London block.
8 · Energy Performance Certificate (EPC)
10-yearlyEPC under the Energy Performance of Buildings (England and Wales) Regulations 2012, with MEES Band E minimum under the Energy Efficiency (PRP) Regulations 2015. Validity: 10 years. Proposed: Band C by 2030 (consultation). At sale: EPC is on the central register; buyer checks directly but the pack should include a PDF copy. Replacement cost: £75-£150. MEES exemption if filed must be in the pack.
Taken together, Group A is the smallest cost to refresh if any certificate is missing or stale, a full re-pack of all eight is typically £1,200-£2,500 for a single HMO, well inside any plausible price-chip a buyer would seek for missing documents.
03 · HMO & hazardGroup B · HMO and hazard documents (9-12)
Group B documents are the ones most likely to be missing on a sale because they are the least routine to produce and the most situation-specific. For a single-let vanilla family home, only the HHSRS and Legionella documents engage. For an HMO in a pre-2000 converted Victorian terrace, all four documents apply and the pack becomes substantially heavier.
9 · HMO Licence + condition history
Licensed HMOs onlyCurrent HMO licence (Mandatory or Additional) with schedule of conditions. Licence does not transfer; buyer applies fresh. Seller provides licence history: any schedule-of-works items, re-inspection reports, and proof of condition compliance. At sale: If the property has been operated without a licence when it should have been, the seller discloses this under TA6 and can face a 12-month Rent Repayment Order claim from occupants. Full detail: licensing comparison.
10 · Legionella Risk Assessment
2-yearlyWritten LRA under HSWA 1974 s.3(2), COSHH 2002 and HSE ACoP L8. Cadence: Initial at tenancy start, review every two years or on material change. At sale: Current LRA plus the prior review record if available. Replacement cost: £120-£250 per property.
11 · Asbestos Management Survey
Pre-2000 buildsUnder Control of Asbestos Regulations 2012. Duty-to-manage applies to common parts of blocks and to any pre-2000 building where works may disturb fabric. At sale: Management Survey Report with asbestos register; Refurbishment/Demolition survey evidence if any works have been done. Replacement cost: £400-£1,200 for a Management Survey on a typical London block; less for a single dwelling.
12 · HHSRS hazard evidence
On demandHousing Act 2004 Part 1. No formal certificate, but the buyer's solicitor may ask for evidence of the landlord's approach to the 29 HHSRS hazards, particularly damp/mould (see Awaab's Law SOP) and excess cold. At sale: Any improvement notices or prohibition orders received must be disclosed; any remedial evidence retained. Cost: None if clean; a live enforcement matter becomes a price-chip or retention.
The single most common reason a London landlord sale slips from exchange to fall-through is a missing certificate in the Group B stack, usually an HMO licence history gap, or an asbestos survey that was never commissioned on a pre-2000 conversion. Both are recoverable; neither is cheap or quick. Both are fully avoidable with a 90-day pre-marketing audit.
04 · Tenancy paperworkGroup C · tenancy paperwork (13-15)
Tenancy paperwork only engages on a tenanted sale. A vacant-possession sale skips this group entirely; a sale with tenants in situ means the buyer inherits every live tenancy and needs the documentation that proves each one is compliant.
13 · Tenancy agreements
All current tenantsSigned AST (or periodic tenancy where the Renters' Rights Act 2025 has commenced) for every current occupant, plus a rent statement / ledger showing the last 12 months' payment history. Identifies break clauses, rent-review mechanics, and any special conditions. At sale: Complete set with amendments, any s.21 or s.8 notices served and their current status, and any tenancy-renewal paperwork.
14 · Deposit Protection certificate
Within 30 daysHousing Act 2004 ss.212-215 and Sch.10. Deposit in an authorised scheme (TDS, DPS, MyDeposits) within 30 days of receipt. Prescribed information served on tenant. At sale: Scheme certificate, prescribed-info served-date evidence, deposit transferred to buyer's scheme (not refunded) unless tenancy ending. Penalty if breached: 1 to 3× deposit damages to tenant; bar on Ground 1A / 1B possession routes if prescribed-info breached.
15 · Right to Rent records
Pre-tenancy per occupantDocumentary checks per occupant under the Immigration Act 2014 and Maximum Penalty Order 2023. At sale: Pass original check documentation to the buyer; buyer continues the follow-up cycle where time-limited leave applies. Penalty if breached: Up to £10,000 per occupant for repeat breaches; up to 5 years' imprisonment for knowing breaches.
05 · Title & ownershipGroup D · title and ownership (16-17)
Group D is the two documents the Land Registry side of the conveyance strictly requires, but they are the most commonly outdated on long-held investment properties where planning permissions have drifted over the years.
16 · Planning permission + Building Regs history
As-built evidenceEvery planning permission, Building Control sign-off, and retrospective lawful-development certificate that applies to the property since construction (or the landlord's acquisition date as a minimum). Common gaps: loft conversions, rear extensions, internal layout changes, HMO conversions without Article 4 permission. Replacement: Retrospective lawful-development certificate (£400-£800), or planning-indemnity insurance (£200-£800). See the Article 4 article for HMO-specific planning.
17 · Title deeds + building insurance
Registry currentHM Land Registry office copy, freehold or leasehold title documents, any restrictions or covenants, service-charge and ground-rent statements for leasehold, and current building insurance (freehold) or confirmation of freeholder's block insurance (leasehold). At sale: Solicitor pulls the office copy fresh; seller provides any deeds, covenants, restrictive agreements not visible on the registry. Insurance is typically evidenced by the current schedule or certificate.
06 · Worked exampleIslington N5 2-bed conversion sale, 8-week timeline
2-bed Victorian conversion, Islington N5, single-let to professional couple
A landlord owns a 2-bed garden flat in a Victorian conversion in Islington N5. Let to a professional couple since 2022 on a periodic tenancy (converted from AST at RRA 2025 commencement). Pre-2000 build; no HMO licensing; Selective Licensing borough. Landlord decides to sell with tenants in situ. Here is how an organised sale runs.
- Week -8 (pre-marketing) · Compliance audit. HSE walks the property and audits every Group A document. Gas Safety expiring in 6 weeks, refreshed. EICR from 2022 renewed (5-year cycle tight). EPC still current. FRA for the block common parts obtained from the freeholder. PAT pack scheduled.
- Week -6 · Group B sweep. Asbestos Management Survey commissioned (pre-2000 build). Legionella Risk Assessment refreshed (last review 2024). HHSRS self-check; no hazards identified.
- Week -4 · Group C tidy. Current tenancy agreement confirmed signed and filed. Deposit Protection certificate retrieved from TDS. Right-to-Rent check documentation located and scanned.
- Week -2 · Group D gather. Land Registry office copy ordered. Planning-history file reviewed: retrospective lawful-development certificate obtained for a 2019 loft conversion that was done without permission. Building insurance current; block insurance certificate provided by freeholder.
- Week 0 · Property listed. Estate agent instructed. Full 17-document pack emailed to the seller's solicitor for proactive lodgement with buyer's solicitor on offer acceptance.
- Week 2 · Offer accepted, memo of sale. Buyer's solicitor instructed; Land Registry search filed; seller's solicitor transmits the full compliance pack within 48 hours.
- Week 4 · TA6 / TA10 returned. Seller's TA6 replies cross-reference the compliance pack. Solicitor's enquiries received and answered within 72 hours, no material gaps.
- Week 6 · Enquiries cleared. Buyer's solicitor confirms pack reviewed; one minor query on the lawful-development certificate (why retrospective), answered with the seller's note. Tenants in situ continue the tenancy; Right-to-Rent chain documented.
- Week 7 · Exchange of contracts. Deposit protection deed of transfer arranged between TDS accounts; tenancy deposit moves to buyer's scheme.
- Week 8 · Completion. Funds move, title transfers. Buyer inherits a fully compliant BTL with the evidence file. No price-chip, no retention, no delay.
8 weeks, clean
An organised pre-sale compliance pack delivers exchange within 6-10 weeks of offer acceptance on a typical London investment sale. The same sale with a messy pack typically runs to 14-20 weeks, with a price reduction or retention on 30-40% of those cases. The 90-day pre-marketing audit is the single highest-leverage cost a selling landlord will incur.
07 · FAQsQuestions selling landlords keep asking
What documents do I need to sell a rental property in London?
A 17-document indexed pack: HMO Licence (if applicable), current Gas Safety CP12, EICR, PAT records, Fire Risk Assessment, Fire Door Inspection report (11 m+), BS 5839 Fire Alarm certificates, Emergency Lighting records, EPC, Legionella Risk Assessment, Asbestos Management Survey (pre-2000), Deposit Protection certificate, Right to Rent records, tenancy agreements, building insurance, planning and building-regs history, and title deeds with proof of ownership. Missing documents delay exchange.
How long does the buyer's solicitor take to review the compliance pack?
For a well-indexed pack, 5 to 10 working days alongside the TA6 and TA10 forms. A badly-indexed pack extends the review to 15-25 working days because the solicitor returns rounds of enquiry; every round typically adds 5 working days. In a chain, the compliance file is often the slowest document, lodging the full pack on day one is the single highest-leverage thing the seller can do.
Can I sell an HMO without a valid HMO licence?
Legally possible but commercially unwise. The licence does not transfer; buyer applies fresh. But if the property has been operated without a licence, the buyer inherits the enforcement-history disclosure obligation, and a council can pursue Rent Repayment Orders against the seller for the preceding 12 months. Most buyers' solicitors will not exchange on an unlicensed HMO without a retention or a price reduction to cover the risk.
What replaces missing compliance documents?
Replacement costs depend on what is missing. Fresh Gas Safety CP12: £70-£120. New EICR: £180-£400. New EPC: £75-£150. Fresh FRA: £300-£900 depending on property type. New LRA: £120-£250. Planning history genuinely missing may require retrospective regularisation or indemnity insurance (£200-£800). Missing HMO-licence history is the hardest to remedy and may cost 12 months of rent in RRO exposure if challenged.
What is a TA6 and how does it relate to the compliance file?
TA6 is the Property Information Form under the Law Society's Conveyancing Protocol. It asks the seller a standardised set of disclosures: boundaries, planning permissions, notices received, disputes, services. For an investment property, TA6 replies sit alongside TA10 (fixtures and contents) and additional leasehold or tenancy disclosures. The 17-document compliance file is the evidence that supports the TA6 replies. A clean pack turns TA6 into a 20-minute task; a missing pack turns it into weeks of back-and-forth.
Does Right to Rent apply at sale?
Yes, where the property transfers with tenants in situ, the new landlord inherits the Right to Rent obligation on every occupant from completion. The seller should retain and pass over the original Right-to-Rent check documentation. If any occupant has time-limited leave expiring during the buyer's ownership, the buyer must re-check on the Home Office cycle. Breach carries up to £10,000 per occupant for repeat breaches under the Maximum Penalty Order 2023.
Every certificate refreshed, every gap closed, the full indexed pack delivered before your property lists
HSE runs the 90-day audit and delivers a single indexed pre-sale compliance pack. Expired certificates refreshed; missing FRA, LRA, asbestos surveys commissioned; planning gaps flagged to a conveyancer. One file, lodged with the solicitor on listing day.
08 · Where to go nextTwo practical follow-ups
If a sale is on the near-horizon, these are the two reads that close the loop.
First, the 17 Statutory Duties checklist, the flagship landlord-pillar article covering every duty behind every document in this pack, with statute, cadence and penalty band for each. Use it as the reference for why each document exists; use this article for how to produce the file at sale.
Second, subscribe to The HSE compliance briefing. One email a month with regulatory, licensing and conveyancing updates. When the Law Society updates the TA6 or a London borough changes its licensing scheme conditions, you will hear it from Kevin within the week.
HSE service for this topic
90-day pre-sale compliance audit
One audit, every certificate refreshed, every gap closed, the full indexed 17-document pack delivered before listing. Conveyancer-ready on day one.