Buying a leasehold flat: essential legal checks

Buying a leasehold flat can be a great move, but it is a different legal beast from buying a freehold. You are buying a lease – a contract giving you the right to occupy for a fixed number of years. Before you exchange contracts, you need to know what you are taking on. It is not just about the price you pay; it is about the legal rights and obligations that come with the lease. A solicitor will review the title and raise enquiries, but it helps to understand the key checks yourself.
Lease length: why the years matter
Most mortgage lenders want at least 70 to 80 years remaining. If the lease has under 70 years, some lenders will refuse a mortgage entirely, and the flat can be hard to sell. A lease under 80 years also triggers marriage value when you extend, making the premium much higher. You have a right to extend under the Leasehold Reform, Housing and Urban Development Act 1993 after two years of ownership, but the cost can be substantial. Check the unexpired term and whether the freeholder is contactable.
Service charges and what they cover
You will usually pay a service charge for building upkeep. Ask for the last three years’ accounts, the current budget, and any planned major works. Look for a healthy reserve fund – if it is low, you could face a large bill for future repairs. Check whether the service charge is fixed or variable, and whether there are any arrears on the account. For major works, the landlord must consult you under Section 20 of the Landlord and Tenant Act 1985. You can challenge unreasonable charges at the First-tier Tribunal. Your solicitor can review the management pack for red flags.
Ground rent and other financial obligations
Ground rent is an annual payment to the freeholder. It might be £50 or £100, but some leases double it every ten or twenty years. A doubling clause every ten years is a common trap. High or escalating ground rent can make a flat unmortgageable. Lenders worry if it exceeds £250 outside London (£1,000 in London). Check for other fees too: permission fees, admin charges, and consent fees for subletting. If the ground rent is problematic, ask about buying the freehold or extending the lease to a peppercorn.
Restrictions, permissions, and your rights
The lease will contain rules on pets, subletting, business use, and alterations. Some changes need the landlord’s consent and a fee. Check whether existing alterations have consent – you could inherit a breach. Check if you can take in a lodger, as this is often restricted. You also have rights: to manage the building, to buy the freehold collectively, and to first refusal if the landlord sells. Building safety is vital: cladding, EWS1 forms, and fire safety can affect mortgages and insurance.
The title and your solicitor's role
Your solicitor will review the title register, lease, and plan. They will check for defects like missing rights of way, boundary issues, and restrictive covenants. They will raise enquiries with the seller’s solicitor and the landlord or managing agent, and obtain the management pack. Look for charges, restrictions, or disputes on the title. If anything is unclear, do not exchange until it is resolved. Ask your solicitor to explain anything you do not understand in plain English. Their report on title is your safety net.
Before you exchange: a practical checklist
Before you commit, confirm these points:
- Lease length: How many years left? Is it mortgageable? Can you extend, and at what cost?
- Service charges: Last three years’ accounts? Reserve fund? Planned works? Any arrears?
- Ground rent: How much? Any review clauses that increase it?
- Restrictions: Pets, subletting, alterations, lodgers – what is allowed?
- Building safety: Cladding, EWS1, fire safety, remediation plans?
- Management: Who is the freeholder and managing agent? Are they responsive?
- Title: Has your solicitor completed all enquiries and reviewed the management pack?
Once you exchange, you are legally bound. Take your time, ask questions, and insist on written answers. Proper legal advice now can save you thousands later.

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