Updated October 2026 · Fraser Bond
Updated October 2026
In short: Hounslow planning applications are submitted via the national Planning Portal and tracked on Hounslow Council's online planning register. Alongside the usual permitted development rules, sites near Heathrow can face aircraft noise and height safeguarding constraints, and areas such as Chiswick, Isleworth and Brentford have conservation areas with stricter controls.
| Project | What to check in Hounslow |
|---|---|
| House extension or loft | Permitted development limits, prior approval, conservation area status |
| Flats and conversions | Full planning; space standards and amenity space |
| HMOs | Article 4 directions and HMO licensing |
| Sites near Heathrow | Noise assessments, height safeguarding, air quality |
| Riverside sites | Flood risk and Thames-related policies |
Confirm current policies and any Article 4 directions with the council.
From idea to decision
| 1 | Research Review nearby decisions on the planning register. |
| 2 | Design Architect or designer; consider a Lawful Development Certificate. |
| 3 | Submit Via the Planning Portal with the correct fee. |
| 4 | Consultation Neighbours and consultees can comment. |
| 5 | Decision 8 weeks for most householder applications. |
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