This tool gives an educational estimate only. Leasehold valuation for legal or lending decisions should be done by a qualified surveyor.
Buying or selling a leasehold property can feel confusing because the “headline market value” is only part of the story. The actual price a buyer should pay depends on lease length, ground rent terms, and the likely cost of extending the lease. This leasehold price calculator helps you estimate a fair value range in seconds.
How this leasehold price calculator works
The calculator starts from a long-lease (or freehold-equivalent) value, then adjusts it using common valuation concepts used in UK leasehold analysis:
- Relativity: Shorter leases are usually worth less as a percentage of full value.
- Capitalised ground rent: Future ground rent payments reduce leaseholder value.
- Reversion value: The freeholder’s future right to the property has present value today.
- Extension premium estimate: A rough indication of what a 90-year extension could cost.
Inputs explained
Long-lease / freehold comparable value is what the property might sell for with a very long lease and nominal ground rent. Use local sold prices for similar properties where possible.
Years remaining is critical. Many properties become materially harder to finance below around 80 years, and discounts can increase quickly as the term falls.
Ground rent terms matter because modern escalating ground rents can have significant present value, especially with frequent reviews and high increases.
Capitalisation and deferment rates convert future cash flows into today’s money. Small changes here can move results, so treat the output as a planning estimate, not a final valuation.
Why lease length can change price dramatically
Lease value erosion is rarely linear. A property with 115 years left may trade close to long-lease value, while one at 68 years can attract a notable discount. Below key thresholds, lenders and buyers may price in extra risk and extension cost uncertainty.
In practical terms, a buyer often asks: “If I pay this price today, what will I need to spend to make the lease marketable in the future?” That future spend is exactly why short leases typically sell at lower prices today.
Quick interpretation guide
- Small discount (0%–5%): Usually long lease, low rent burden.
- Moderate discount (5%–15%): Mid-length lease or stronger rent terms.
- Larger discount (15%+): Short lease and/or expensive extension outlook.
What this tool is best for
- Comparing two leasehold flats before making an offer.
- Testing how sensitive value is to rent review assumptions.
- Estimating negotiation room when lease years are low.
- Planning ahead for lease extension budgeting.
Important limitations
This calculator does not replace a professional RICS valuation or legal advice. Real transactions depend on additional factors, such as:
- Local demand by postcode and building type.
- Service charge and reserve fund health.
- Building defects, cladding, or management issues.
- Exact lease wording and statutory eligibility.
- Lender criteria at the time of purchase or remortgage.
Final thought
A leasehold price calculator is most useful when used as a decision aid: it helps you ask better questions, compare scenarios, and avoid surprises. For any binding price decision, combine this estimate with local comparables, legal review, and a specialist valuation report.