Buying a leasehold flat: the service charge checklist

The purchase price is only half the story with a leasehold flat. The other half is what the flat costs to own — the annual service charge, the ground rent, and the one-off major works bills that can arrive without warning. Those costs are knowable before you exchange, if you and your conveyancer ask the right questions. This checklist covers the service charge due diligence that protects you from an expensive surprise after completion.

1. Get and read the LPE1 (and LPE2)

The LPE1 — the Leasehold Property Enquiries form — is the standard questionnaire your conveyancer sends to the landlord or managing agent. It is the single most revealing document in the whole transaction. It sets out the current service charge, the ground rent, any arrears on the flat, the reserve fund balance, insurance details, whether major works are planned, and whether there are any disputes. Where the seller is themselves a leaseholder subletting, an LPE2 may also be used. Read the LPE1 in full yourself — do not rely on a one-line summary. The questions your conveyancer should chase are the ones the form answers vaguely or leaves blank.

2. Review two to three years of service charge accounts

Ask for the last two to three years of certified service charge accounts and read them side by side. You are looking for the direction of travel and for anything that does not add up: charges rising far faster than inflation, large "miscellaneous" or "management" lines, a jump in one year that is never explained, or a balancing charge at year end that turns a modest budget into a much bigger actual bill. A single year tells you little; a trend tells you a lot. For context on what "normal" looks like, our is my service charge too high? guide and the Service Charges Map help you benchmark.

3. Check the reserve (sinking) fund balance

The reserve fund (or sinking fund) is money the building saves towards big future costs — a new roof, lift replacement, external redecoration. A healthy balance means those costs are being spread fairly over time. A near-empty reserve in an older building is a red flag: it usually means the next major repair will be funded by a large one-off levy, and if you own the flat when the bill lands, you pay it, not the seller. Ask what the reserve is intended to cover and whether it is anywhere near adequate for the building's age and condition.

4. Ask about planned major works and Section 20 consultations

This is where the biggest surprises hide. Ask specifically whether any major works are planned, budgeted or under discussion, and whether a Section 20 consultation has been started, completed recently, or is expected. Under Section 20 of the Landlord and Tenant Act 1985, the landlord must consult leaseholders before carrying out works that would cost any one leaseholder more than £250, or entering a long-term agreement costing more than £100 a year. A live or recent Section 20 process is a clear signal that a substantial one-off bill is on the way — and a demand issued after you complete is generally your liability, even for works decided before you owned the flat. See what to do about a Section 20 notice for how the process runs.

5. Check for disputes and tribunal history

The LPE1 should disclose current or recent disputes. Dig into any that exist. A history at the First-tier Tribunal can cut both ways: it may mean leaseholders successfully challenged an overcharging landlord (useful to know), or that the building is poorly run and conflict-prone. Either way you want to understand what the dispute was about, whether it is resolved, and whether any determination affects future charges. Unexplained arrears attached to the flat you are buying also need clearing before completion.

6. Check the ground rent and its review pattern

Ground rent is separate from the service charge and can be a trap in older leases. Check the current amount and — critically — how it reviews. A rent that doubles every 10, 15 or 25 years can escalate to a level that makes the flat hard to sell or mortgage. For leases granted on or after 30 June 2022, the Leasehold Reform (Ground Rent) Act 2022 caps ground rent on most new residential long leases at a peppercorn (effectively zero) — but that protection does not rewrite the terms of an older lease you might be buying into. Ask your conveyancer to confirm the exact review mechanism in writing.

7. Check the lease length and marriage value risk

Ask how many years are left on the lease. As a rough guide, once the term falls below about 80 years, extending it becomes significantly more expensive because of marriage value, and a short lease can also be difficult to mortgage. If the remaining term is anywhere near that threshold, price a future lease extension into your offer, or ask the seller to begin the extension before completion. Leasehold reform is changing this landscape — the planned abolition of marriage value has been subject to legal challenge — so confirm the current position with your conveyancer rather than assuming.

8. Check the building-safety and cladding status

For flats in taller or higher-risk blocks, building safety is now a core part of due diligence. Ask whether the building has any cladding or fire-safety issues, whether any remediation is planned or underway, and how it is being funded. The Building Safety Act 2022 introduced protections that shift many remediation costs away from qualifying leaseholders, but the picture is building-specific and evolving. Your conveyancer should obtain the relevant fire-safety and building-safety information and confirm, in writing, that you will not inherit an uncapped remediation liability.

Run every item above and you will know what the flat truly costs before you commit — not after the first demand lands. Independent analysis has found leasehold service charges rising far faster than inflation, with the average annual bill now around £2,300 (Hamptons, 2024), and the gap between a well-run building and a badly run one can be thousands of pounds a year.

Frequently asked questions