What is a lease extension, and what is marriage value?
A lease extension adds years to a leasehold term, and marriage value is an extra payment that becomes due once the lease is short — which is why extending early is dramatically cheaper than extending late.
Why leases need extending. A lease is a wasting asset. Every year it shortens, and the shorter it gets the less it is worth. Below around 80 years the value falls faster; below 70 many lenders become reluctant; below 60 mortgage finance becomes difficult and the pool of buyers shrinks sharply.
The statutory route. Qualifying leaseholders of flats have a legal right to extend, historically requiring ownership for two years and producing an additional 90 years at a peppercorn ground rent. The Leasehold and Freehold Reform Act 2024 legislated changes including a longer extension term and removal of the ownership qualifying period — but implementation has been staged, so confirm what is actually in force before relying on it.
The informal route is negotiating directly with the freeholder. Faster and cheaper in fees, but you get whatever you agree — sometimes a shorter extension with a retained ground rent, which can be worse than it appears.
How the premium is calculated. Broadly three components:
The loss of ground rent the freeholder would have received.
The reversion — the value of getting the flat back at the end, discounted to today.
Marriage value, where applicable.
What marriage value actually is. Extending the lease increases the total value of the freehold and leasehold interests combined — the whole becomes worth more than the parts. That uplift is marriage value, and under the historic regime it is split equally between leaseholder and freeholder once the lease falls below 80 years.
This creates a cliff edge. At 80 years and one day, no marriage value. At 79 years, the leaseholder pays half of the uplift, which can add many thousands of pounds overnight.
Abolishing marriage value was a central element of the 2024 Act, and has been subject to legal challenge.
Practical advice: check your remaining term now, get a valuation from a specialist surveyor, and do not drift toward 80 years.
General information, not legal or valuation advice.