Housing stock in Kensington & Chelsea
Stucco terraces, mansion blocks, Georgian and early-Victorian townhouses — mostly Grade II.
Planning in Kensington & Chelsea
RBKC is the strictest planning authority in London for extensions. Basement policy is tight (post-2015), Article 4 removes PD in most zones, and heritage officers scrutinise everything.
Party Wall Act — what to expect
Basement work almost always triggers major Party Wall Awards on both flanks — plan for surveyors on all sides.
Read the Party Wall etc. Act 1996 guide for full detail on notices, timelines and surveyor costs.
Typical costs in Kensington & Chelsea
For a mid-spec 25 m² kitchen extension, all-in (professional fees, planning, party wall, VAT and 12% contingency), expect roughly £180,000 to £300,000. 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.
Our calculator applies a 1.20× multiplier automatically for Kensington & Chelsea projects. Get an itemised breakdown in 60 seconds.
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