Buying a Leasehold Property in 2026: The Due Diligence Questions You Must Ask

Why Leasehold Requires Extra Vigilance

Buying a leasehold flat in England or Wales means acquiring a time-limited interest in a property rather than outright ownership of the land and building. The terms of your lease — some of which were drafted decades ago — govern almost every aspect of your rights and financial obligations as an owner. Getting these details right before exchange of contracts is far cheaper and simpler than trying to remedy problems afterwards.

The questions below are not exhaustive, but they cover the issues most likely to affect your finances and your ability to sell or remortgage in the future.

Lease Length: The Mortgage Threshold

Most high-street mortgage lenders will not lend on a lease with fewer than 70 to 85 years remaining (the exact threshold varies by lender). If you are buying a lease with fewer than 80 years remaining, you should factor in the cost of a statutory lease extension before or shortly after purchase — waiting until the lease falls below 80 years triggers the "marriage value" premium, which significantly increases the cost of extending.

Ask: **How many years remain on the lease?**

Ground Rent Terms

For leases granted before 30 June 2022, ask:

• What is the current ground rent, and how often is it reviewed?
• Is there a doubling clause, an RPI-linked escalation, or a fixed review?
• Has the freeholder agreed to a deed of variation to remove onerous terms following the CMA investigation?

For leases granted on or after 30 June 2022, ground rent must be peppercorn by law — but verify this is actually the case in the lease you are buying.

Service Charge History

Ask the seller's solicitor for the last three years of service charge accounts and the last three years of demands. Look for:

• Unexplained year-on-year increases
• Large one-off demands that may indicate prior sinking fund inadequacy
• Any disputes, Tribunal applications, or unresolved complaints

If the managing agent has changed recently, ask why.

Sinking Fund Balance

Ask for the current balance of the reserve or sinking fund. Compare it against the age and condition of the building — a 1970s block with a sinking fund of £10,000 across 40 flats is severely underfunded. Request the most recent reserve fund study if one has been carried out.

Major Works: Planned and Pending

Ask specifically whether the landlord or managing agent has notified residents of any planned or proposed major works. Check whether any Section 20 consultation notices have been issued. An impending major works project can mean a five- or six-figure demand arriving within months of completion.

Building Safety

For buildings over 11 metres or five storeys, ask whether any building safety issues have been identified — cladding, fire doors, compartmentation defects. If they have, understand whether the leaseholder protections under the Building Safety Act 2022 will apply. Obtain a copy of any fire risk assessments.

Management Arrangements

• Who is the freeholder?
• Who is the managing agent?
• Is there a residents' management company or right to manage company in place?

A managing agent with multiple County Court judgments, numerous Tribunal applications, or a history of complaints is a warning sign.

Using the Calculator to Budget Accurately

Before making an offer, model the full running cost of the property. Our [leasehold cost calculator](/leasehold-cost-calculator) lets you combine service charge estimates, ground rent (current and projected), sinking fund contributions, and building insurance into a single annual and monthly figure — so you know exactly what you are committing to.