Extensions cost in Brighton
2026 prices for East Sussex · South East
Extensions in Brighton typically costs between £33,500 and £134,500, with most homeowners landing near £84,000. Local pricing sits about 12% above the UK average. Strong demand and overspill from London keep day rates high, though materials and waste costs are close to the national average.
£33,500 – £134,500
UK average £2,200 per m² · Brighton index 112
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Extensions prices in Brighton by finish level
| FINISH LEVEL | BRIGHTON COST | WHAT'S INCLUDED |
|---|---|---|
| Budget | £33,500 – £50,500 | Entry-level materials, existing layout retained |
| Mid-range | £48,500 – £73,000 | Better fittings, some layout change |
| Premium | £65,500 – £98,500 | High-specification materials and full redesign |
£46,200
About 55% of a typical Brighton job, at South East day rates.
£37,800
Materials pricing is broadly national — this is where specification, not location, drives your total.
What affects extensions cost in Brighton
Regency terraces and bay-fronted Victorian stock with extensive conservation areas. Coastal exposure and narrow street access add cost to scaffolding, render and window work.
- Drainage runs needing diversion
- Party wall agreements with neighbours
- Poor ground conditions requiring deeper foundations
Rules in Brighton
Building control and planning applications for extensions work in Brighton go through Brighton & Hove City Council. Confirm before booking whether your property sits in a conservation area, is listed, or is covered by an Article 4 direction — each removes permitted development rights and changes the approval route.
Serving BN1, BN2, BN3 and the surrounding East Sussex area.
Find vetted trades near BrightonExtensions in Brighton: common questions
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