Leasehold Reform Act 2024 update: The Act abolishes marriage value and introduces 990-year extensions, but these provisions are not yet in force — they require secondary legislation still awaited. This calculator uses current law (1993 Act rules).
Lease Extension · England & Wales · 2025/26

How much will your lease extension cost?

Estimate the statutory premium you would pay to extend your lease, broken down into its three components — ground rent capitalisation, reversion value and marriage value.

80 yrs Critical threshold
for marriage value

Your property details

Enter the details below for an estimated premium range. All figures are estimates — get a formal RICS valuation before serving any notices.

£

The current market value of your leasehold flat as it stands today.

yrs

Check your lease or Land Registry title. This is the most important input.

£

Your current annual ground rent. Enter 0 if peppercorn.

Check your lease for any ground rent review clauses.

%

Standard Sportelli rate is 5% for flats. Lower rates increase the premium.

%

Typically 6–8% depending on ground rent amount and lease terms.

%

The value of your lease as % of freehold value. Auto-estimated from lease length if left blank.

Location affects relativity values used in the calculation.