Hounslow, London
Boroughs · West London
Hounslow · Outer London

House extensions in Hounslow

Chiswick pays prime-tier prices for premium detailing; the rest of Hounslow delivers cost-efficient family extensions.

Typical all-in (inc VAT)
£95k–£155k
Cost vs London base
-2%
Postcodes covered
TW3 · TW4 · TW5 · TW7

Housing stock in Hounslow

1930s semis, Georgian and Victorian villas in Chiswick, riverside terraces in Isleworth.

Rear extensionWraparoundSide-return (Chiswick)

Planning in Hounslow

Chiswick's conservation areas (Bedford Park, Grove Park) demand higher-spec detailing. Elsewhere planning is pragmatic.

Party Wall Act — what to expect

Chiswick terraces = two party walls; Hounslow semis = one.

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

Typical costs in Hounslow

For a mid-spec 25 m² kitchen extension, all-in (professional fees, planning, party wall, VAT and 12% contingency), expect roughly £95,000 to £155,000. 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
Outer London · -2% vs London average

Our calculator applies a 0.98× multiplier automatically for Hounslow projects. Get an itemised breakdown in 60 seconds.

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Areas we cover in Hounslow

TW3TW4TW5TW7TW8TW13TW14W4

Why homeowners in Hounslow pick us

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