Extension and loft costs by region
Modelled 2026 prices for house extensions and loft conversions in Nottingham and its suburbs, with which council handles your application, conservation areas, highway licence fees, ground conditions and local house prices.
Modelled 2026 prices for house extensions and loft conversions in Liverpool, with the city’s new Housing Design Guide, Article 4 rules in conservation areas, skip and scaffold permit fees, and local house prices.
Side-by-side 2026 prices for loft conversions and house extensions in six UK cities, with links to each local guide.
Modelled 2026 prices for loft conversions and house extensions in Glasgow, using Scottish planning fees and building warrant fees, with Glasgow City Council guidance, tenement law and local house values.
Modelled 2026 prices for loft conversions and house extensions in Bristol, with Bristol City Council planning guidance, conservation areas, hillside access, permits and local house values.
Modelled 2026 loft conversion and extension costs for Leeds, with what is possible on back-to-backs, the Leeds Householder Design Guide, stone-built homes, conservation areas and a worked example.
Modelled 2026 prices for loft conversions, house extensions and garage conversions in Manchester, with local housing stock, Greater Manchester planning guidance, permits and a worked example.
Loft conversion and house extension prices in Birmingham for 2026, with modelled costs for every main project, the city’s 45-degree code and Design Guide rules, conservation areas, house prices and a worked example.
What a house extension costs in London in 2026, with prices for single storey, kitchen, side return and two storey extensions, inner and outer London rates, borough planning rules, clay foundations and party walls.
What a loft conversion costs in London in 2026, by type, size and finish, with London cost per m², borough planning and conservation area rules, party wall costs and a worked example.
