Architects in Hounslow
We've designed new homes and mixed-use schemes in Hounslow, and we work on homes across Chiswick, Isleworth, Feltham and Heston.
Hounslow publishes some of the clearest extension rules in London, in its 2024 design codes. That makes the starting point for a homeowner project easy to set, and the design work goes into getting the most from those limits.
For developers, Hounslow's conversion and HMO policies are among the tightest in west London, so feasibility work matters before you buy.
Planning context in Hounslow
- Single-storey rear extensions are limited to 3.05m deep on terraced houses, 3.65m on semi-detached and 4.25m on detached houses (Residential Extension Guidelines, May 2024). Source
- Full-width box dormers are normally refused; dormers must be set in from the ridge, eaves and sides, by at least 1m on larger houses. Source
- A borough-wide Article 4 direction has required planning permission for small HMOs since 4 September 2023. Source
- HMOs are expected within a 400m walk of town centre facilities and in areas with good public transport (HMO SPD, 2017). Source
- Additional HMO licensing applies borough-wide from 11 December 2025. Source
Checked October 2026. Policy changes frequently; we confirm the position for your address at the outset of every project.
