Lease Extension Premiums Below 80 Years:What Tribunal Decisions Show

The 80-year mark is widely considered the most consequential threshold in lease extension valuation. Once the unexpired term drops below it, the valuation formula changes — the freeholder becomes entitled to a share of marriage value, the uplift in value created by extending the lease.

That single change typically produces three observable effects in tribunal cases:

• Higher headline premiums compared with otherwise similar leases above 80 years
• Sharper sensitivity to property value assumptions
• Greater divergence between the freeholder's and leaseholder's surveyor figures

For a fuller explanation of the rule itself, see our 80 Year Lease Rule guide.

Published First-tier Tribunal decisions are one of the only sources of independent evidence on what a "reasonable" lease extension premium actually looks like. Across decisions involving leases below 80 years, three patterns recur:

• Premiums often increase below 80 years. Marriage value adds a discrete component that does not exist above the threshold.
• Outcomes vary significantly. Two leases with similar terms can produce materially different determinations depending on property value, ground rent profile and the valuation evidence presented.
• Comparable cases matter. Tribunals weight prior decisions and surveyor evidence heavily — which is why a structured comparison against comparable cases is more informative than a formula estimate alone.

LeaseIntel benchmarks user-supplied quotes against this body of comparable tribunal decisions rather than producing a single calculator figure.

The visualisations below are illustrative placeholders. They represent the structure of analysis LeaseIntel publishes, not actual tribunal data points.

Data visualisations will expand as LeaseIntel's tribunal analysis library grows.

Two leases below 80 years can look almost identical on paper and still produce very different tribunal determinations. The most common drivers are:

• Property value. Premiums scale with the underlying flat value — higher-value flats produce higher marriage value.
• Ground rent. The ground rent profile materially affects the term value the freeholder gives up.
• Local factors. Regional value trends and comparable evidence shape what the tribunal accepts.
• Valuation assumptions. Deferment rates, relativity and capitalisation rates can move the answer significantly.
• Tribunal evidence. Which comparables each surveyor relies on — and how the tribunal weights them — drives the outcome.

Marriage value is one of the most frequently disputed components of a lease extension premium below 80 years. It is also one of the most consequential. For how premiums scale across different unexpired terms, see our analysis of lease extension cost by years remaining, or benchmark your own quote against comparable tribunal cases.

• A common source of disputes between leaseholder and freeholder surveyors
• Frequently considered and adjusted by First-tier Tribunals
• Can have a significant impact on the final premium awarded

• Guide80 Year Lease Rule Explained
• GuideWhat Is Marriage Value?
• AnalysisLease Extension Cost by Years Remaining
• AnalysisLatest Tribunal Outcomes