Conversion of roof space to habitable use to include a rear dormer, 3 front rooflights and conversion of roof from hip to gable end and single storey outbuilding to rear for use as a gym room/storage (Application for a Certificate of Lawful Development for a Proposed Development)
Erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 8 metres, for which the maximum height would be 3 metres, and for which the height of the eaves would be 3 metres
Conversion of roof space to habitable use to include a rear dormer, 3 front rooflights and conversion of roof from hip to gable end and single storey outbuilding to rear for use as a gym room/storage (Application for a Certificate of Lawful Development for a Proposed Development)
Erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 8 metres, for which the maximum height would be 3 metres, and for which the height of the eaves would be 3 metres
Building-control records are not yet collected for Hillingdon — the register is being gathered borough by borough (held so far: Lambeth, Brent, Ealing, Westminster, City and others).
Place
What affects it?
Every mapped designation touching a premises in this postcode, with how many of its 7 premises each one covers.
Designation
Coverage
Article 4 Direction Area
Residential extensions · reference A8177 · covers 7 of 7 premises. Some normally permitted changes may require planning permission.
Article 4 Direction Area
Residential extensions · reference A8177 · covers 7 of 7 premises. Some normally permitted changes may require planning permission.
Nearby postcodes and streets
Walk to the next area — linked where the Atlas has a record for it (pilot borough only for now).
Planning precedent3 applications and 3 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy5 EPC records; ratings D: 2, E: 2, G: 1.
What is not assertedNo capacity, value or ownership claim is made at area level; those belong to individual premises records and their evidence.
Intent signals
Planning Atlas Pro
Ownership, finance and market signals recorded at addresses in this postcode — each with date and source. Signals are evidence of change, not a prediction.
Boundary: OS Postcode Unit areas (Ordnance Survey), 2026-08-14. Planning records: canonical stage2. EPC: EPC register. Premises: OS AddressBase / UPRN.
UB3 4NF, Hillingdon: planning and property history | Planning Atlas