Question 1

How much does a rear extension or side-return infill cost on a Southfields terrace in SW18?

Accepted Answer

A ground-floor rear addition on an SW18 Southfields terrace — structure, roof, glazed rear wall, electrics and plumbing — generally runs £46,000 to £80,000 before any kitchen refit is included. Pulling the side return into the footprint adds roughly £14,000 to £26,000 on top depending on the length of the return. Together, the two moves convert a pinched Victorian ground floor into a full-width kitchen-dining-living space that makes the whole property feel significantly larger. The quote separates extension structure from kitchen specification so either can be adjusted independently. Any heating upgrades are carried out by our Gas Safe registered partner.

Question 2

Do dormer loft conversions on Southfields streets need planning permission, or do they fall under permitted development in SW18?

Accepted Answer

Most rear dormer conversions on the Replingham Road grid qualify as permitted development — no application required — provided the dormer sits below the ridge, is set back from the eaves, and the materials match the existing roof. There is no borough-wide Article 4 direction removing permitted development rights across the main SW18 residential streets in Southfields. A conservation area designation on your specific road, or a design that pushes beyond standard parameters, would require a full planning consent. We confirm the exact position at the visit, secure a lawful development certificate where it protects you on resale, and serve party-wall notices to both adjoining owners as standard.

Question 3

What does a full house renovation cost on a three-bedroom terrace in Southfields, SW18?

Accepted Answer

Bringing a three-bedroom SW18 terrace up to a contemporary standard — complete rewire, replumbing, new boiler via our Gas Safe registered partner, rear extension, a new kitchen, two bathrooms and full decoration throughout — typically falls in the range of £115,000 to £200,000. Structural condition, kitchen and bathroom specification, and whether a loft conversion is included are the main variables. Properties close to Wimbledon Park and the All England Club tend to support investment in premium finishes, and we price those choices separately on the quote so you can see exactly what each specification decision costs before committing.

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