Loft conversion cost
in St John's Wood.
St John's Wood — NW8 — north of Marylebone, with leafy streets of Italianate villas and Edwardian mansion blocks. One of London's most settled residential neighbourhoods.
What makes loft work in St John's Wood distinct.
Housing: Italianate stucco villas, red-brick Edwardian mansion blocks, and detached houses on the prime streets near Lord's.
Planning: St John's Wood Conservation Area covers most of NW8. Article 4 directions remove PD rights on key streets.
Applications go to City of Westminster. We submit on your behalf and handle conservation officer correspondence end-to-end.
The five loft types — NW8 numbers.
All figures inclusive of design, planning, build, contingency and VAT. The St John's Wood multiplier (1.20×) 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 St John's Wood and beyond.
Send me the guide.
What St John's Wood homeowners ask us.
Do I need planning permission for a loft in St John's Wood?
St John's Wood Conservation Area covers most of NW8. Article 4 directions remove PD rights on key streets. Outside conservation areas, most rear-dormer conversions in St John's Wood 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.
What's the most common loft type on St John's Wood villas?
Mansards behind the existing parapet, with slate or zinc-finished mansard slopes. The villas were built with parapeted facades, which makes mansards relatively invisible from the street. Budgets typically £200–£300k all-in.
How long does a St John's Wood loft conversion take?
Typical timeline: 6–10 weeks for design and planning (longer in conservation areas like much of St John's Wood), 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.
What does a loft conversion add to St John's Wood property values?
In NW8, 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 £54k–£264k build commonly exceeds the build cost by 30–60%.
Does 2VP work on St John's Wood loft conversions?
Yes — St John's Wood is within our core London catchment. Our studio is at 20 Dawes Road in Fulham, 7.0km from St John's Wood. We've delivered loft conversions across the NW8 postcode and our subcontractor network covers Westminster. Free site visit, fixed-price quote, 10-year HomePro guarantee on the finished work.
Pricing for St John's Wood’s neighbours.
Twenty minutes on site in St John's Wood.
On us.
Nick Elias RIBA and Vladimir will visit your St John's Wood 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 St John's Wood loft conversion using the same 2026 rate card we quote real clients with.
Price my St John's Wood loft →