Wandsworth, London
Boroughs · South London
Wandsworth · Inner London

House extensions in Wandsworth

The most active side-return market in London. Clear planning guidance and strong buyer demand make Wandsworth a reliable ROI borough.

Typical all-in (inc VAT)
£125k–£185k
Cost vs London base
+8%
Postcodes covered
SW11 · SW12 · SW15 · SW17

Housing stock in Wandsworth

Victorian and Edwardian terraces at scale — Tooting, Balham and Battersea are the classic side-return heartland.

Side-returnWraparoundLoft L-dormer

Planning in Wandsworth

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

Party Wall Act — what to expect

Two party wall Awards on almost every terrace project.

Read the Party Wall etc. Act 1996 guide for full detail on notices, timelines and surveyor costs.

Typical costs in Wandsworth

For a mid-spec 25 m² kitchen extension, all-in (professional fees, planning, party wall, VAT and 12% contingency), expect roughly £125,000 to £185,000. High-spec finishes, structural glazing or a full basement dig-out will push above the top of this range; a smaller side-return can come in under the bottom.

Cost tier
Inner London · +8% vs London average

Our calculator applies a 1.08× multiplier automatically for Wandsworth projects. Get an itemised breakdown in 60 seconds.

Get your Wandsworth estimate

Areas we cover in Wandsworth

SW11SW12SW15SW17SW18

Why homeowners in Wandsworth pick us

  • KYB-verified builders only
  • Local Wandsworth project experience
  • Fixed, itemised written quotes
  • Full insurance & warranty checks
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