126 Cannonbury Avenue, Pinner, Harrow, HA5 1TT

1. 26 Jan 2026

   Received by Harrow

2. 12 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 23 March 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

The published feed does not show a live status for this application, which usually means the council register holds more recent detail than the copy PlanIndex receives.

The council portal linked on this page carries the authoritative version, including the documents, any consultation deadline and the decision once made. PlanIndex refreshes its copy of the register on a daily cycle.

Prior approval applications arise where permitted development rights already grant the principle of the work, such as larger home extensions, changes of use to housing or agricultural buildings. The council may only consider the specific matters set out in the rules, for example transport, flooding or appearance, and in many classes the work may proceed if the council does not respond within the deadline, commonly 56 days.

More on prior approval applications in our guide

• 86 Cannonbury Avenue, Pinner, Harrow, HA5 1TT

  PL/0361/25 Submitted 13 Feb 2025 0m away

  Conversion of garage to habitable room, Replace garage door with window in front elevation, Alterations to roof of garage to raise height, Single storey rear extension, Raised patio to rear, External alterations

  Granted Householder Extension Windows or glazing
  Small domestic

• 106 Cannonbury Avenue, Pinner, Harrow, HA5 1TT

  PL/3312/25 Submitted 19 Dec 2025 0m away

  Single storey rear extension: 8.00 metres deep, 3.90 metres maximum height and 2.70 metres high to the eaves

  Granted Prior approval Extension
  Small domestic

• 106 Cannonbury Avenue, Pinner, Harrow, HA5 1TT

  PL/3319/25 Submitted 19 Dec 2025 0m away

  Decision due ~13 Feb

  Certificate of Lawful Development (Proposed): Wrap around rear dormer; two rooflights in both side roof slopes

  Status unknown Lawful development Extension Loft or dormer

• 141 Cannonbury Avenue, Pinner, Harrow, HA5 1TR

  PL/0905/25 Submitted 31 Mar 2025 39m away

  Single storey front extension incorporating porch, Single and two storey side to rear extension (Demolition of attached garage)

  Withdrawn Householder Extension Demolition
  Small domestic

• 69 Chestnut Drive, Pinner, Harrow, HA5 1LX

  PL/1667/26 Submitted 17 Jun 2026 60m away

  Decision due ~12 Aug

  Single and first floor rear extensions; external alterations

  Status unknown Householder Extension
  Domestic

• 69 Chestnut Drive, Pinner, Harrow, HA5 1LX

  PL/1399/26 Submitted 21 May 2026 60m away

  Decision due ~16 Jul

  Single storey rear extension: 6.00 metres deep, 3.00 metres maximum height and 3.00 metres high to the eaves

  Status unknown Prior approval Extension
  Small domestic

• PL/1797/26 Status unknown

  61 Uppingham Avenue, Stanmore, Harrow, HA7 2JB

  Single storey rear extension: 6.00 metres deep, 3.40 metres maximum height and 3.00 metres high to the eaves

  2 Jul 2026 Prior approval
• PL/1793/26 Status unknown

  36 Hinkler Road, Kenton, Harrow, HA3 9AU

  Single storey rear extension: 6.00 metres deep, 3.38 metres maximum height and 2.75 metres high to the eaves

  1 Jul 2026 Prior approval
• PL/1792/26 Status unknown

  3 Monro Gardens, Harrow Weald, Harrow, HA3 6HH

  Single storey rear extension: 6.50 metres deep, 3.20 metres maximum height and 3.00 metres high to the eaves

  1 Jul 2026 Prior approval
• PL/1794/26 Status unknown

  65 Dean Drive, Edgware, Stanmore, Harrow, HA7 1HB

  Single storey rear extension: 5.00 metres deep, 3.00 metres maximum height and 3.00 metres high to the eaves

  1 Jul 2026 Prior approval
• PL/1749/26 Status unknown

  22 Hazelwood Close, Harrow, HA2 6HD

  Single storey rear extension: 4.50 metres deep, 3.00 metres maximum height and 2.80 metres high to the eaves

  29 Jun 2026 Prior approval