Loft conversion cost
in South Kensington.
South Kensington — SW7 — the museum quarter and one of the densest concentrations of Italianate Victorian terraces in London. The Onslow, Brompton and Cromwell grid is among RBKC's most architecturally protected.
What makes loft work in South Kensington distinct.
Housing: Tall Italianate stucco terraces, four to five storeys, mostly converted to large flats with some intact single-family homes.
Planning: Thurloe-Smith's Charity, Brompton, Queen's Gate and Cornwall conservation areas overlap across SW7. Listed-building consent is common.
Applications go to Royal Borough of Kensington & Chelsea. We submit on your behalf and handle conservation officer correspondence end-to-end.
The five loft types — SW7 numbers.
All figures inclusive of design, planning, build, contingency and VAT. The South Kensington multiplier (1.25×) reflects local labour, scaffolding logistics, conservation requirements and finish expectations.
The 2026 London Loft Cost Guide.
Borough-by-borough pricing, a full cost breakdown, PD vs full planning explained, and the seven hidden costs to watch for in South Kensington and beyond.
Send me the guide.
What South Kensington homeowners ask us.
Do I need planning permission for a loft in South Kensington?
Thurloe-Smith's Charity, Brompton, Queen's Gate and Cornwall conservation areas overlap across SW7. Listed-building consent is common. Outside conservation areas, most rear-dormer conversions in South Kensington 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.
How long does the planning process take in South Kensington?
Allow 4–6 months from first design sketch to a determined planning application. RBKC's conservation team is thorough, neighbour consultations on SW7 streets are often robust, and listed-building consent (where applicable) runs in parallel rather than in series.
How long does a South Kensington loft conversion take?
Typical timeline: 6–10 weeks for design and planning (longer in conservation areas like much of South Kensington), 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. Royal Borough of Kensington & Chelsea processes PD-route Lawful Development Certificates in approximately 8 weeks.
What does a loft conversion add to South Kensington property values?
In SW7, 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 £56k–£275k build commonly exceeds the build cost by 30–60%.
Does 2VP work on South Kensington loft conversions?
Yes — South Kensington is within our core London catchment. Our studio is at 20 Dawes Road in Fulham, 3.0km from South Kensington. We've delivered loft conversions across the SW7 postcode and our subcontractor network covers Kensington & Chelsea. Free site visit, fixed-price quote, 10-year HomePro guarantee on the finished work.
Pricing for South Kensington’s neighbours.
Twenty minutes on site in South Kensington.
On us.
Nick Elias RIBA and Vladimir will visit your South Kensington home, walk the loft, check head height, advise on PD vs planning, and give you a realistic budget and programme — even if a loft isn’t right for your house.
One number. Sixty seconds. No callback.
Price your South Kensington loft conversion using the same 2026 rate card we quote real clients with.
Price my South Kensington loft →