Housing stock in Lambeth
Victorian terraces (Herne Hill, Clapham), Georgian townhouses (Kennington), 1930s stock in Streatham.
Planning in Lambeth
Well-established supplementary guidance on rear extensions. Conservation areas in Herne Hill, Clapham Old Town and Kennington need careful design of glazing and roof.
Party Wall Act — what to expect
Terraces trigger two party walls; Kennington's Georgian stock adds vaults/loft structural complexity.
Read the Party Wall etc. Act 1996 guide for full detail on notices, timelines and surveyor costs.
Typical costs in Lambeth
For a mid-spec 25 m² rear dormer loft conversion, all-in (structural design, building control, party wall, VAT and 12% contingency), expect roughly £115,000 to £175,000. A mansard, a hip-to-gable with high-spec en-suite joinery or a conservation-area application will push above the top of this range; a self-built rooflight conversion comes in well under the bottom.
Our calculator applies a 1.06× multiplier automatically for Lambeth projects. Get an itemised breakdown in 60 seconds.
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