Cowley architects.
Britain's No. 1
Colham Manor may be popular, but wait until people see your new home extension.
We’re Britain’s #1 architectural practice for all-things extending
Be cost efficient on designs + planning support
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Hillingdon planning application stats
Applications in Cowley are decided by the Hillingdon planning team. Our planning permission win rate is...
92%
vs 87% national average
Catherine Warburton
Former Frome Council Planning OfficerSamuel Patten, Becky Smith, Sharan Singh,...
We've had 99 applications approved in Hillingdon.
Average construction costs for the Hillingdon area.
In the last year, the construction costs* we've seen for the Cowley area are as follows
Rear
£k
Side Infill
£k
Loft
£k
First Floor
£k
More extensions we’ve completed in Hillingdon
Explore designs, build costs and planning applications for more of our extensions.Why people near you love Resi
Over 10600 homeowners have trusted Resi with their home extensions — that’s more than any other architect in the UK.
Feel confident knowing you're with the #1 architect on Trustpilot
Minimise planning risks with our 95% planning approval rate
Stress less with support from your dedicated Account Manager
Keep your project on time & budget with our project management app
Collaborate with your designer on screen-sharing calls
Get introductions to vetted contractors you can trust
Ensure quality with state of the art technology including laser scanners & 3D modelling software
Receive a premium service at an affordable price thanks to Resi's proprietary technology & processes
Builders we work with in Hillingdon
Fittra
Other architects in Cowley
The Plan Hub, AC Design Solutions Ltd, Chiltern Architectural Services, Ace Engineering, The Planning Man, PlanApps, Plansing
Other locations we do projects around Cowley
Yiewsley, Uxbridge, Hillingdon, West Drayton, Harmondsworth, Sipson, Longford, Ickenham, Harlington, Cranford,
Postcodes we serve in and around Cowley
UB8, UB9, UB10, UB11, TW1, TW2, TW3, TW4, TW5, TW6, TW7, TW8
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Resi Design Ltd. trading as 'Resi' | Company No: 10471125
We are proud to employ architects registered with the Architects Registration Board and were awarded the mark for The Mayor's Good Work Standard for fair pay & conditions, wellbeing, skills, progression, diversity and recruitment.