Perpetuity Rules: Pre-2010 vs Post-2010 Deeds
The legal framework governing overage durations depends on when the original transfer deed was executed:
1. Deeds Executed on or After 6 April 2010: Governed by the Perpetuities and Accumulations Act 2009. Section 5 establishes a single statutory perpetuity period of 125 years. While parties can agree any duration up to 125 years, market standards rarely exceed 25 years.
2. Deeds Executed Before 6 April 2010: Governed by the Perpetuities and Accumulations Act 1964. The perpetuity period was limited to either a specified period not exceeding 80 years or 'lives in being plus 21 years'. Deeds drafted with unlimited durations violate the rule against perpetuities and are legally void.
Typical Overage Clause Durations by Land Asset Class
| Land / Property Asset Type | Market Standard Duration | Typical Clawback Percentage | Common Trigger Event |
|---|---|---|---|
| Agricultural Land with Edge-of-Settlement Hope | 20 to 25 Years | 25% to 40% of uplift | Grant of residential planning permission |
| Commercial Brownfield Site | 10 to 15 Years | 20% to 35% of uplift | Implementation of mixed-use consent |
| Residential Garden Infill Plot | 5 to 10 Years | 30% to 50% of uplift | Sale of plot with detailed planning |
| Public Sector / Council Land Disposal | 25 to 50 Years | 50% of uplift | Section 123 best consideration compliance |