The Developer's Dilemma: The Single-Dwelling Covenant
The most frequent hurdle facing UK residential developers is the classic 'one dwelling only' covenant. A builder purchases an older detached house with a large 0.75-acre garden with the goal of demolishing the existing home and constructing four modern executive detached houses.
However, the 1920s title deeds stipulate: 'No more than one dwellinghouse shall be erected upon the said land.'
If the builder starts work without resolving this restriction, any neighbour or historic estate owner with the benefit of the covenant could apply to the High Court for an immediate injunction halting construction or ordering the demolition of the new houses.
Commercial developer indemnity insurance solves this deadlock by transferring the entire financial risk to an institutional insurance underwriter (such as DUAL Asset, First Title, or Aviva).
| Scheme Scale | Project Gross Development Value (GDV) | Typical One-Off Premium | Underwriting Complexity |
|---|---|---|---|
| Single Plot Split (1 Extra Home) | £600,000 to £1,200,000 | £1,800 to £3,500 | Standard commercial rate card |
| Small Scheme (2 to 4 Houses) | £1,500,000 to £3,500,000 | £3,500 to £7,500 | Bespoke legal review of planning objections |
| Medium Scheme (5 to 12 Units) | £4,000,000 to £10,000,000 | £8,000 to £18,000+ | Senior counsel opinion often required |
| Large Commercial / Regeneration | £10,000,000+ | Bespoke (% of GDV) | Full underwriting panel negotiation |
What the Developer Policy Covers
Developer policies provide comprehensive protection that protects the developer, their development finance lenders, and ultimately all individual plot purchasers:
• Injunction Defence & Settlement: Paying all legal costs to defend injunction proceedings and funding financial buyouts to discharge the restriction.
• Demolition & Alteration Costs: Covering the cost of demolishing or reconfiguring buildings if a judge orders structural modification.
• Abortive Development Costs: Reimbursing architects' fees, engineering costs, planning fees, and construction expenses if a project is permanently blocked.
• Loss of Development Profit: Paying the difference between the planned development value and the residual land value.
A major commercial benefit of developer policies is that they automatically cover subsequent individual buyers and their mortgage lenders when each finished house is sold. The developer passes a copy of the master policy to each buyer's solicitor, preventing conveyancing delays on sales completion.
Developer Risk-Mitigation Protocol
Follow this checklist when appraising development sites encumbered by covenants: