Southfields Dormer Loft Conversion

A typical loft conversion with us, a rear dormer with an en-suite, costs about £80,000–£90,000 to build, excluding VAT and professional fees. Prices are the same across the boroughs we cover, though access and logistics can affect the final figure. You get a fixed quote after a site visit. Other loft types, such as hip-to-gable and mansard, are priced at the site visit. Our Southfields project included structural steelwork, dormer construction, and premium finishes.

Most loft conversions in Southfields and Wandsworth fall under Permitted Development rights, meaning no planning permission is needed. However, properties in conservation areas or with specific restrictions may require approval. We check the planning position at our free site visit, and we work with your architect on any application.

A typical loft conversion in the Wandsworth SW18 area takes 8–12 weeks from start to completion. Our Southfields loft conversion was completed in 10 weeks, including all structural work, insulation, electrics, plastering, and finishing to a high standard.

In Southfields and the wider Wandsworth SW18 area, dormer loft conversions are the most popular choice as they maximise headroom and usable floor space. Hip-to-gable conversions are also common on semi-detached and end-of-terrace Victorian and Edwardian homes that are typical of the area.

Absolutely. A well-executed loft conversion in Wandsworth can add 15–20% to your property value. In the SW18 postcode, where average property prices are high, this can translate to a significant return on investment — often far exceeding the cost of the conversion itself.

Yes. We're FMB members. This Southfields dormer took 10 weeks, and we've also converted a loft in Richmond and built one as part of our Chiswick townhouse renovation. All three are on our projects page, and we're happy to share references from past clients.

Our Southfields loft conversions typically include structural steelwork (we coordinate the structural engineer; their fee is quoted separately), dormer or roof light installation, staircase construction, full insulation to building regulations, electrical and plumbing first and second fix, plastering, decoration, and premium finishes. We manage the entire project from design to handover.