12 original research reports built on 6,000+ First-tier Tribunal decisions spanning more than 20 years. Independent, evidence-led, and grounded in what tribunals actually determined.
The single most important number in lease extension law — and what it costs to cross it.
Median premiums are 3.5× higher below 80 years than above. Analysis of 595 decisions.
Read reportWhat marriage value is, when it applies, and why it drives premiums so sharply.
Read reportWhat tribunal outcomes show once marriage value becomes payable.
Read reportThe three core variables — property value, lease length, and years remaining — quantified from tribunal data.
How premiums change as unexpired term falls, band by band.
Read report595 decisions grouped by lease length — from under 40 years to over 80.
Read reportHow premiums scale from sub-£250k properties to those over £1 million.
Read reportBoth ends of the spectrum — from £14 premiums to over £10 million.
When to act, and how the choice of route affects the final premium.
How location shapes tribunal outcomes across England & Wales.
The reports show what tribunals decided across thousands of comparable cases. LeaseIntel positions your specific quote against them.
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