Loft conversion cost
in Soho.

Soho Conservation Area covers virtually the whole neighbourhood. High listed-building density. Outside conservation areas, most rear-dormer conversions in Soho qualify for permitted development (PD) within the 40m³ (terrace) or 50m³ (semi/detached) volume limits. Mansards always need full planning. We check your specific address before quoting and submit the application on your behalf.

Sometimes — but only with freeholder consent, party wall awards on all flats below, full planning, and usually listed-building consent. Access is the biggest practical challenge because scaffold has to be carefully managed in narrow Soho streets. Premium budgets are normal.

Typical timeline: 6–10 weeks for design and planning (longer in conservation areas like much of Soho), then 8–14 weeks on site for a standard dormer, 12–18 weeks for an L-shape or hip-to-gable, and 14–20 weeks for a mansard. City of Westminster processes PD-route Lawful Development Certificates in approximately 8 weeks.

In W1, a well-executed loft conversion typically adds 15–25% to property value — often more in prime postcodes. The ROI is strongest when you add a double bedroom plus en-suite, which is the standard L-shape dormer configuration. Property uplift on a £55k–£268k build commonly exceeds the build cost by 30–60%.

Yes — Soho is within our core London catchment. Our studio is at 20 Dawes Road in Fulham, 6.5km from Soho. We've delivered loft conversions across the W1 postcode and our subcontractor network covers Westminster. Free site visit, fixed-price quote, 10-year HomePro guarantee on the finished work.