Short Leases — The 80-Year Cliff
The single biggest leasehold risk is a short lease. Once a lease drops below 80 years, the cost to extend it rises steeply — a rule baked into the Leasehold Reform Act 1967. Below 80 years, you have to pay 'marriage value' on top of the standard extension cost, which can add tens of thousands to the bill.
Most high-street mortgage lenders won't lend on properties with fewer than 70 years remaining. Some won't lend below 80. That means if you buy a property with 75 years on the lease and try to sell in 10 years' time, your buyer's options will be severely limited.
- ▸90+ years: Generally fine — monitor as time passes
- ▸80–90 years: Start planning an extension within 2–3 years
- ▸70–80 years: Negotiate extension before exchange, or factor in the cost
- ▸Under 70 years: Major red flag — lenders often won't touch it
Ground Rent Review Clauses
Ground rent is an annual fee paid to the freeholder. In older leases, this could be a nominal £50–£250/year. The problem is review clauses — provisions in the lease that allow ground rent to increase over time.
The most dangerous version is a doubling clause, where ground rent doubles every 10 or 25 years. A ground rent starting at £250 doubles to £500, then £1,000, then £2,000 — easily making the property unmortgageable and nearly unsellable within a few decades. The Leasehold Reform (Ground Rent) Act 2022 banned this for new leases, but existing leases are unaffected.
Service Charges
Service charges cover the maintenance of communal areas — cleaning, gardening, building insurance, roof repairs, lifts. In theory, you pay your share of actual costs. In practice, service charges vary wildly — from £800/year in a small, well-run block to £6,000/year in a mismanaged development.
Ask the seller or managing agent for three years of service charge accounts. Look for large, unexplained increases. Also ask about the reserve fund (or sinking fund) — a healthy reserve means major works are planned for and paid for without sudden large bills. A zero or near-zero reserve is a warning sign.
- ▸Reasonable range: £1,000–£3,000/year for most flats in the UK
- ▸Section 20 notices: Check if any major works are planned — you're legally entitled to be consulted for bills over £250/year
- ▸Managing agent reputation: Search the company name online. Poor management is common and difficult to change
Restrictive Covenants and Permissions
Leases often contain restrictions that don't appear in the listing. Common ones include: no pets, no subletting (which kills buy-to-let potential), no alterations without freeholder consent, and restrictions on short-term lets like Airbnb.
These covenants are legally binding on you, even if the seller didn't follow them. Your solicitor will review these as part of the conveyancing, but it's worth asking about them upfront so you're not surprised when the legal pack arrives.
Right to Manage and Enfranchisement
Leaseholders have the legal right to collectively take over management of their building (Right to Manage) or buy the freehold outright (collective enfranchisement), provided enough qualifying leaseholders participate. These rights are powerful but involve legal costs and require cooperation between neighbours.
When researching a property, check whether the building already has a residents' management company — this often means leaseholders have already exercised Right to Manage, which is generally a positive sign that the building is well run by the people who live there.
Key Takeaways
- ✓Check the lease length — anything below 80 years needs careful attention and likely an extension
- ✓Read the ground rent review clause carefully — doubling clauses can make a property unsellable
- ✓Request three years of service charge accounts and check for a healthy reserve fund
- ✓Ask your solicitor about restrictive covenants before exchange, not after
- ✓A residents' management company is usually a positive indicator