Loft conversion cost
in Streatham.
Streatham — SW16 — south of Tooting Bec. A large residential area with Edwardian and inter-war terraces, plus pockets of Victorian housing around the older village core.
What makes loft work in Streatham distinct.
Housing: Edwardian terraces, inter-war semis, and 1920s/30s housing on the southern slopes.
Planning: Streatham Hill, Streatham Common and Telford Park conservation areas cover specific pockets.
Applications go to LB Lambeth. We submit on your behalf and handle conservation officer correspondence end-to-end.
The five loft types — SW16 numbers.
All figures inclusive of design, planning, build, contingency and VAT. The Streatham multiplier (0.88×) 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 Streatham and beyond.
Send me the guide.
What Streatham homeowners ask us.
Do I need planning permission for a loft in Streatham?
Streatham Hill, Streatham Common and Telford Park conservation areas cover specific pockets. Outside conservation areas, most rear-dormer conversions in Streatham 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 cost-effective loft type in Streatham?
Standard rear dormer on a typical Edwardian terrace — usually PD-compliant, typical budget £90–£125k all-in. The ROI is strong as Streatham continues to gentrify, with property uplift often exceeding the build cost by 30–50%.
How long does a Streatham loft conversion take?
Typical timeline: 6–10 weeks for design and planning (longer in conservation areas like much of Streatham), 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. LB Lambeth processes PD-route Lawful Development Certificates in approximately 8 weeks.
What does a loft conversion add to Streatham property values?
In SW16, 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 £40k–£194k build commonly exceeds the build cost by 30–60%.
Does 2VP work on Streatham loft conversions?
Yes — Streatham is within our core London catchment. Our studio is at 20 Dawes Road in Fulham, 8.0km from Streatham. We've delivered loft conversions across the SW16 postcode and our subcontractor network covers Lambeth. Free site visit, fixed-price quote, 10-year HomePro guarantee on the finished work.
Pricing for Streatham’s neighbours.
Twenty minutes on site in Streatham.
On us.
Nick Elias RIBA and Vladimir will visit your Streatham 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 Streatham loft conversion using the same 2026 rate card we quote real clients with.
Price my Streatham loft →