Housing stock in Hillingdon
1930s semis and detached, larger Arts & Crafts in Ruislip and Northwood.
Planning in Hillingdon
One of the most PD-friendly boroughs in London. Northwood and Ruislip Manor conservation areas are the exceptions.
Party Wall Act — what to expect
Semi-detached — one party wall typical, often none for detached homes.
Read the Party Wall etc. Act 1996 guide for full detail on notices, timelines and surveyor costs.
Typical costs in Hillingdon
For a mid-spec 25 m² rear dormer loft conversion, all-in (structural design, building control, party wall, VAT and 12% contingency), expect roughly £85,000 to £140,000. 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 0.95× multiplier automatically for Hillingdon projects. Get an itemised breakdown in 60 seconds.
Get your Hillingdon estimateAreas we cover in Hillingdon
Why homeowners in Hillingdon pick us
- KYB-verified builders only
- Local Hillingdon project experience
- Fixed, itemised written quotes
- Full insurance & warranty checks