Pre-set example. Adjust the size below to recalculate.
Estimate uses Wandsworth Council build-cost premium and typical rear dormer ranges for Wandsworth.
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Every Wandsworth postcode district we draw in, the stock that dominates it and the authority that validates a loft conversion cost dormer there. Wandsworth fees below are the statutory England rates for 2026, not loft conversion cost dormer estimates.
| Postcode | Area | Dominant stock | What it means for a loft conversion cost dormer |
|---|---|---|---|
| SW18 | Wandsworth / Earlsfield / Southfields | Victorian villas and terraces | SW18 covers Wandsworth / Earlsfield / Southfields only; Wandsworth Council handles the loft conversion cost dormer. |
| SW4 | Clapham | Victorian terraces, Edwardian villas | Clapham is split at SW4. Either Lambeth Council or Wandsworth Council can determine a loft conversion cost dormer here, so the SW4 address is checked against both policies maps first. |
| SW8 | South Lambeth / Nine Elms | Victorian terraces, new-build apartments | A loft conversion cost dormer in South Lambeth / Nine Elms may land with Lambeth Council or Wandsworth Council — SW8 crosses the boundary, and the SW8 policies map decides it street by street. |
| SW16 | Streatham / Norbury | Edwardian terraces, post-war flats | Streatham / Norbury is split at SW16. Either Lambeth Council or Wandsworth Council or Merton Council or Croydon Council can determine a loft conversion cost dormer here, so the SW16 address is checked against both policies maps first. |
| SW19 | Wimbledon / Colliers Wood | Victorian villas, Edwardian terraces | Wimbledon / Colliers Wood is split at SW19. Either Merton Council or Wandsworth Council can determine a loft conversion cost dormer here, so the SW19 address is checked against both policies maps first. |
| SW11 | Battersea / Clapham Junction | Victorian terraces, mansion blocks | Battersea / Clapham Junction sits wholly inside SW11, so Wandsworth Council validates every loft conversion cost dormer submitted from an SW11 address. |
| SW12 | Balham | Victorian and Edwardian terraces | SW12 straddles a boundary: Balham addresses fall to Wandsworth Council or Lambeth Council, so confirm which authority validates the loft conversion cost dormer before submitting SW12 drawings. |
| SW15 | Putney / Roehampton | Edwardian terraces, Victorian villas, mansion blocks | Putney / Roehampton sits wholly inside SW15, so Wandsworth Council validates every loft conversion cost dormer submitted from an SW15 address. |
Roof pitch, wall build-up and plot depth change every few Wandsworth streets, and each one changes what a loft conversion cost dormer can achieve at that address.
Conservation areas covering Wandsworth: Wandsworth Council runs 45, and Nightingale Triangle, Wandsworth Common, Clapham Common West are the ones Wandsworth owners meet most. A loft conversion cost dormer inside a Wandsworth conservation area loses permitted development, so the Wandsworth submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Tonsley a loft conversion cost dormer is judged on the street elevation first.
What Article 4 removes near Wandsworth: Article 4 for HMO conversions covering the whole borough. Before pricing a loft conversion cost dormer we check whether the SW11 address is inside the mapped area, because Wandsworth Council draws the Wandsworth boundary street by street rather than across the whole of Wandsworth.
Wandsworth housing stock: Extensive Victorian terraced streets — the classic London side-return extension opportunity; Edwardian villas around the commons; 1930s semi-detached in Southfields. Family-oriented, high side-return extension and loft conversion rates; planning department experienced with Victorian terrace modifications. Read that before choosing a loft conversion cost dormer route in Wandsworth — construction, not postcode, sets what is achievable.
Sources for this Wandsworth loft conversion cost dormer page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.
