Southwark, London
Boroughs · South London
Southwark · Inner London

House extensions in Southwark

East Dulwich and Nunhead terraces are perennial side-return favourites. Dulwich Estate zones add a private consent layer to plan around.

Typical all-in (inc VAT)
£115k–£175k
Cost vs London base
+6%
Postcodes covered
SE1 · SE5 · SE15 · SE16

Housing stock in Southwark

Victorian terraces (East Dulwich, Nunhead), Georgian terraces (Bermondsey), 1930s (Camberwell).

Side-returnRear extensionLoft

Planning in Southwark

Dulwich Estate's private scheme of management adds an extra layer alongside council planning — factor in additional design review time.

Party Wall Act — what to expect

Terraces: two party walls standard. Dulwich Estate consent is separate from Party Wall.

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

Typical costs in Southwark

For a mid-spec 25 m² kitchen extension, all-in (professional fees, planning, party wall, VAT and 12% contingency), expect roughly £115,000 to £175,000. 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 · +6% vs London average

Our calculator applies a 1.06× multiplier automatically for Southwark projects. Get an itemised breakdown in 60 seconds.

Get your Southwark estimate

Areas we cover in Southwark

SE1SE5SE15SE16SE17SE22

Why homeowners in Southwark pick us

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