What might a lease extension cost?

Three numbers and we'll estimate the premium to add 90 years at a peppercorn rent — and warn you before the 80-year rule makes it dearer.

Property value with a long lease (£)

What the flat would be worth once extended — recent sales of similar flats with long leases are a good guide.

Years left on the lease

On the lease itself, the land registry title, or your mortgage offer.

Annual ground rent (£)

Enter 0 for a peppercorn. If it doubles or rises over time, the true premium will be somewhat higher than shown.

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Estimated premium (guide range)

What the freeholder is paid for	Estimate

Reform is coming. The Leasehold and Freehold Reform Act 2024 will change how premiums are worked out — including abolishing marriage value — once the government switches its valuation rules on. Until that day, valuations follow the current method shown here.

Extending before you buy, remortgage or sell?

The premium and legal costs can usually be financed — through the remortgage itself, further borrowing, or a short bridge. Many of our lenders are comfortable lending on short leases where the extension completes on day one.

Talk to us about funding it