12 MONTCALM CLOSE HAYES UB4 9HF

1. 10 Nov 2025

   Received by Hillingdon

2. 3 Dec 2025

   Validated

   Checked as complete and ready for consideration.

3. 28 Jan 2026

   Decision issued: Permitted

4. 12 Aug 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.

More on full applications applications in our guide

• 3 MONTCALM CLOSE HAYES UB4 9HF

  77788/APP/2023/685 Submitted 8 Mar 2023 0m away

  Erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4.00 metres, for which the maximum height would be 3.00 metres, and for which the height of the eaves would be 2.93 metres.

  Granted Full applications Extension 4 docs
  Small domestic

• 110 GREENWAY HAYES MIDDX UB4 9HT

  65447/APP/2026/1941 Submitted 5 Aug 2026 142m away

  86% historically approved · decision due ~30 Sep

  Erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4.00 metres, for which the maximum height would be 3.15 metres, and for which the height of the eaves would be 3.00 metres

  Awaiting decision Extension
  Small domestic

• 1 HENDERSON ROAD HAYES UB4 9JG

  80095/APP/2026/1359 Submitted 29 May 2026 199m away

  86% historically approved · decision due ~24 Jul

  Erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4.00 metres, for which the maximum height would be 3.70 metres, and for which the height of the eaves would be 3.00 metres

  Awaiting decision Extension
  Small domestic

• 5 BARNHILL LANE HAYES MIDDLESEX UB4 9HD

  57780/APP/2026/13 Submitted 5 Jan 2026 219m away

  Erection of wrap around two-storey side extension, part single part double storey rear extension, following the demolition of side store.

  Granted Full applications Extension Demolition 8 docs

• 5 BARNHILL LANE HAYES MIDDLESEX UB4 9HD

  57780/APP/2026/1889 Submitted 29 Jul 2026 219m away

  86% historically approved · decision due ~23 Sep

  Change of use from C3 to C2 Children's Residential Care Home

  Decided

• 2 WEBBS ROAD HAYES UB4 9JW

  79871/APP/2026/92 Submitted 12 Jan 2026 239m away

  Erection of a part single part two storey rear extension, and a single storey side extension, following demolition of existing conservatory and porch.

  Granted Full applications Extension Demolition 6 docs
  Small domestic

• 80149/APP/2026/1572 Granted

  14 LADYGATE LANE RUISLIP HA4 7QU

  Erection of single storey side and rear wraparound extension, a front porch, amendments to fenestration and roof lights to the front, side and rear sloped roof, following the removal of the rear chimney and garden shed. (Description Amended)

  24 Jun 2026 Full applications
• 79879/APP/2026/1749 Granted

  21 NORTH AVENUE HAYES UB3 2JE

  Erection of part single storey, part double storey rear extension

  13 Jul 2026 Full applications
• 74889/APP/2026/1363 Granted

  32 MANOR ROAD HAYES UB3 2DG

  Erection of a first-floor rear extension.

  1 Jun 2026 Full applications
• 53073/APP/2026/1645 Granted

  50 MINET DRIVE HAYES UB3 3JW

  Erection of a part single storey, part two storey extension to the rear

  1 Jul 2026 Full applications
• 80172/APP/2026/1717 Refused

  6 SQUIRRELS TRADING ESTATE VIVEASH CLOSE HAYES UB3 4RZ

  Change of use from Class B8 to Class E retail

  8 Jul 2026 Full applications