Roehampton, London
Areas · Wandsworth · South London
Roehampton · SW11 · SW12 · SW15

House extensions in Roehampton

Roehampton sits in Wandsworth, where the streets are dominated by Edwardian bay-fronted semis with generous rear gardens and side access. The build that pays back most reliably here is a glazed side-return infill that pulls south light into a dark middle room.

Typical all-in (inc VAT)
£119k–£179k
Build rate per m²
£2975–£4550
On-site programme
12–20 weeks

What we build in Roehampton

Most Roehampton projects we scope fall into three buckets: a side-return or rear infill that fixes a dark galley kitchen, a full-width rear extension that opens the ground floor to the garden, and a rear-plus-loft package that adds a bedroom while the scaffold is already up. Victorian and Edwardian terraces at scale — Tooting, Balham and Battersea are the classic side-return heartland.

Side-returnWraparoundLoft L-dormer

Extension costs in Roehampton

A mid-spec 25 m² extension in Roehampton typically lands between £119,000 and £179,000 all-in — that figure includes professional fees, planning and Building Control, party wall, a 12% contingency and VAT at 20%. Ex-VAT build rates run £2975–£4550 per m² depending on glazing, structural spans and kitchen spend.

ProjectSizeRoehampton all-in
Side return infill15–20 m²£89k – £134k
Full-width rear20–30 m²£119k – £179k
Wraparound30–45 m²£173k – £260k
Double-storey rear40–60 m²£232k – £349k

Planning permission in Roehampton

Wandsworth has published clear extension SPDs and is one of the more predictable planning boroughs. Conservation zones (Nightingale, Battersea Park) tighten design review.

Before you assume permitted development applies to your street, check whether your street falls inside a conservation area or an Article 4 direction — both are common in Wandsworth and both remove PD rights for rear and side extensions. Our London planning guide walks through the tests in order.

Party wall and neighbours

Two party wall Awards on almost every terrace project.

Serve notice at least two months before you break ground. Budget £1,200–£2,400 per adjoining owner if they dissent and appoint their own surveyor — see the Party Wall Act guide.

Access, logistics and site set-up

Narrow roads limit lorry size, so materials arrive in smaller loads; a good programme allows for it.

Every quote we issue for Roehampton prices skip permits, parking suspensions, protection and welfare explicitly in the preliminaries — so the number you sign is the number you pay.

Value added in Roehampton

Buyers in this area consistently pay a premium for open-plan kitchen-diners with direct garden access.

Typical programme

  1. Weeks 0–4Measured survey, design and structural calcs
  2. Weeks 4–12Planning or lawful development certificate, party wall notices
  3. Weeks 12–16Tender, builder selection and contract signing
  4. Weeks 16–34On site: groundworks, shell, watertight, first and second fix
  5. Week 35Building Control sign-off, snagging and handover

Full detail in the London extension timeline guide.

Why homeowners in Roehampton use us

  • KYB-verified builders only
  • Live Wandsworth project experience
  • Itemised fixed-price specifications
  • Insurance, warranty and accreditation checks
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