Buying a Leasehold Flat: Hidden Costs and What to Check

What you are buying with a leasehold property

When you buy a leasehold property, you buy the right to occupy the property for a fixed term — typically 99 to 999 years remaining at the point of purchase. You do not own the land or the building structure; that belongs to the freeholder. The freeholder can be a private individual, a management company, or a housing association. Your legal relationship with the freeholder is governed by the lease, which specifies your rights, obligations, service charges, and ground rent obligations.

The Leasehold Reform (Ground Rent) Act 2022 abolished ground rent for new leases granted after 30 June 2022, replacing them with a nominal 'peppercorn' rent. For existing leases granted before this date, ground rent obligations remain in force and can be significant — sometimes £300 to £1,000 per year or more on older leases.

Service charges: what to ask before buying

Service charge pays for the maintenance, repair, insurance, and management of the building's common parts. You need to see the last three years' service charge accounts before exchanging. Look for: how much the current service charge is per year; whether there is a reserve or sinking fund and how much is in it; any major works that have been completed recently and at what cost; and any major works planned or anticipated in the near future.

Buildings with no sinking fund and a backlog of deferred maintenance are a significant risk. If the building needs a new roof, lift, or external wall treatment, the cost will be divided between leaseholders as a 'major works' or 'section 20' charge. These bills can run to £5,000 to £30,000 per flat with relatively short notice. Your solicitor should review the management pack and flag any planned major works before exchange.

Lease length and why it matters

Mortgage lenders will typically not lend on properties with less than 70 to 85 years remaining on the lease, depending on the lender. Properties with less than 80 years remaining are also more expensive to extend — below 80 years, the freeholder becomes entitled to 'marriage value', which increases the cost of a lease extension significantly. When searching for a flat, filter out anything with less than 90 years remaining unless you are prepared to negotiate a lease extension either before or shortly after purchase.

Extending a lease costs money. As a rough guide, extending a 75-year lease to 125 years on a £350,000 flat in London might cost £12,000 to £25,000 in premium (payable to the freeholder), plus £3,000 to £6,000 in solicitor and surveyor fees. You can only apply for a formal lease extension once you have owned the property for two years, though you can negotiate informally with the freeholder before this.

The conveyancing process for leaseholds

Leasehold transactions require your solicitor to review the lease itself (which can be hundreds of pages for complex modern leases), raise enquiries with the managing agent, review the management pack, check the service charge accounts, and advise on any unusual or onerous lease terms. This additional work means leasehold conveyancing typically takes longer and costs more than freehold conveyancing.

Your solicitor will need to raise a notice of assignment with the freeholder after completion, which is a legal requirement that notifies the freeholder of the change of ownership. This often incurs a notice fee payable to the freeholder of £50 to £300. Some leases also require a formal licence to assign — an older mechanism that requires the freeholder's consent to the sale and typically costs £200 to £600 plus legal fees.

Frequently asked questions