Loft conversion cost
in Mortlake.
Mortlake — SW14 — west of Barnes, on the south bank of the Thames. A quieter neighbourhood with Edwardian terraces and a strong river-village character.
What makes loft work in Mortlake distinct.
Housing: Edwardian terraces with outriggers, plus older cottages near the riverside and 1920s semis on the southern edges.
Planning: Mortlake Conservation Area covers the historic core; outside it, PD rights are usually intact.
Applications go to LB Richmond upon Thames. We submit on your behalf and handle conservation officer correspondence end-to-end.
The five loft types — SW14 numbers.
All figures inclusive of design, planning, build, contingency and VAT. The Mortlake multiplier (0.96×) 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 Mortlake and beyond.
Send me the guide.
What Mortlake homeowners ask us.
Do I need planning permission for a loft in Mortlake?
Mortlake Conservation Area covers the historic core; outside it, PD rights are usually intact. Outside conservation areas, most rear-dormer conversions in Mortlake 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 typical loft type in Mortlake?
L-shape rear dormers on the Edwardian terraces — the deep outriggers respond well. Hip-to-gable conversions are common on the 1920s semis further south. Mansards are rare and usually require full planning.
How long does a Mortlake loft conversion take?
Typical timeline: 6–10 weeks for design and planning (longer in conservation areas like much of Mortlake), 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 Richmond upon Thames processes PD-route Lawful Development Certificates in approximately 8 weeks.
What does a loft conversion add to Mortlake property values?
In SW14, 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 £43k–£211k build commonly exceeds the build cost by 30–60%.
Does 2VP work on Mortlake loft conversions?
Yes — Mortlake is within our core London catchment. Our studio is at 20 Dawes Road in Fulham, 5.0km from Mortlake. We've delivered loft conversions across the SW14 postcode and our subcontractor network covers Richmond upon Thames. Free site visit, fixed-price quote, 10-year HomePro guarantee on the finished work.
Pricing for Mortlake’s neighbours.
Twenty minutes on site in Mortlake.
On us.
Nick Elias RIBA and Vladimir will visit your Mortlake 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 Mortlake loft conversion using the same 2026 rate card we quote real clients with.
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