Areas / Hillingdon / UB9
Architects in UB9
Harefield and the Colne Valley. Village houses and larger plots, much of it in the Green Belt.
RIBA Chartered Practice · ARB-registered architects · Extensions, lofts and planning drawings
Planning authority
Which council decides in UB9?
All of UB9 is in Hillingdon, so Hillingdon decides planning applications here. 205 postcodes, 11.6 miles from our studio.
| Council | Share of UB9 postcodes |
|---|---|
| Hillingdon | 100% (205) |
By postcode sector
| Sector | Postcodes | Council |
|---|---|---|
| UB9 5 | 4 | Hillingdon |
| UB9 6 | 201 | Hillingdon |
Postcode checker
Check your exact postcode
Type any postcode in the 33 London boroughs we cover. We'll tell you which council handles planning there and show you the local planning points.
Local planning points
If your home is in Hillingdon
Householder extensions are assessed against Local Plan Part 2 policy DMHD 1, Alterations and Extensions to Residential Dwellings (adopted January 2020).
SourceConverting a house into flats needs an original internal floor area of at least 120 sq m, one unit per floor, and no more than 10% of a street converted (policy DMH 4).
SourceA borough-wide Article 4 direction has required planning permission for small HMOs since 11 December 2025.
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