Housing stock in City of London
Mostly apartments and lofts within listed buildings; very few extendable houses.
Planning in City of London
Almost entirely conservation area. Householder extensions are rare; internal alterations and loft conversions dominate and often need listed building consent.
Party Wall Act — what to expect
Vertical Party Wall notices to flats above and below are standard for internal work.
Read the Party Wall etc. Act 1996 guide for full detail on notices, timelines and surveyor costs.
Typical costs in City of London
For a mid-spec 25 m² kitchen extension, all-in (professional fees, planning, party wall, VAT and 12% contingency), expect roughly £120,000 to £190,000. 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 1.15× multiplier automatically for City of London projects. Get an itemised breakdown in 60 seconds.
Get your City of London estimateAreas we cover in City of London
Why homeowners in City of London pick us
- KYB-verified builders only
- Local City of London project experience
- Fixed, itemised written quotes
- Full insurance & warranty checks