Brook House 54a Cowley Mill Road Uxbridge UB8 2FX Data via plota.co.uk
Proposal
Construction of two additional storeys to existing two-storey office building, with erection of a three-storey front extension, associated external alterations to the existing building (including replacement of the existing metal cladding facade with new brickworks and glazed facade, installation of a front entrance canopy), and reconfiguration of the existing car park. (AMENDED DESCRIPTION) Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicted a decision around 9 Oct 2026; it is now day 88.
Site constraints 10
Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI), Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.
Building
From the energy performance certificate lodged in November 2023, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate
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Important details
- Council
- Hillingdon
- Postcode
- UB8 2FX
- Received
- 3 Jun 2026
- Validated
- 13 Jul 2026
- Ward
- UXBRIDGE 2022
- Case officer
- Show
- Target decision
- 12 Oct 2026
- Agent
- Show
Decision outlook
Day 88, past the statutory target. 67% of commercial and major works in Hillingdon are decided within thirteen weeks, which runs to 12 Oct 2026; extensions of time are common, and the council need not decide on the day. Last seen undecided on 7 Oct 2026.
Plota live figures for commercial and major works decided by Hillingdon in the last twelve months, from validation. Hillingdon decision record →
Consultation & key dates
- Consultation
- 15 Jul 2026
- Comments by
- 5 Aug 2026
Historical activity at this location
1 nearby application on record - archival context, not part of the live application.
Hillingdon ranks #194 out of 296 councils for householder decision speed. Householder applications are slightly more likely to be approved here (90%) than the national average (90%).
Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.
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Brook House 54a Cowley Mill Road Uxbridge UB8 2FX
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The consultation period closed on 5 Aug 2026.