12 St Leonards Avenue, Harrow, HA3 8EL

1. 19 Jul 2007

   Received by Harrow

2. 24 Jul 2007

   Validated

   Checked as complete and ready for consideration.

3. 13 Sep 2007

   Decision issued: Grant

4. 6 Sep 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

• 12 St Leonards Avenue, Harrow, HA3 8EL

  P/2915/06 Submitted 12 Oct 2006 0m away

  Certificate of lawful proposed development: erection of single storey rear extensiion to semi-detached dwellin ghouse

  Granted Lawful development 17 docs
  Small domestic

• 10 St Leonards Avenue, Kenton, Harrow, HA3 8EL

  P/0800/18 Submitted 27 Feb 2018 0m away

  Single storey front and two storey side to rear extension incorporating front porch; single storey rear extension; rear dormer; rooflight in front roofslope to create habitable roofspace (demolition of conservatory)

  Refused Householder Extension Loft or dormer +1 10 docs
  Small domestic

• 8 St Leonards Avenue, Harrow, HA3 8EL

  EAST/899/02/FUL Submitted 12 Jul 2002 0m away

  Single storey rear extension

  Granted Full applications Extension
  Small domestic

• 12 St Leonards Avenue, Harrow, HA3 8EL

  P/0990/07 Submitted 2 Apr 2007 0m away

  Two storey side to rear extension; rear dormer; single storey front side and rear extensions

  Decided Full applications Extension Loft or dormer 22 docs
  Small domestic

• 20 Kingshill Avenue, Kenton, Harrow, HA3 8JP

  PL/0886/24 Submitted 27 Mar 2024 96m away

  Single storey rear extension; first floor rear extension; rear dormer; rooflights in front, side, and rear roof slopes; external alterations

  Granted Householder Extension Loft or dormer
  Small domestic

• 16 Kingshill Avenue, Kenton, Harrow, HA3 8JP

  P/0131/18 Submitted 11 Jan 2018 96m away

  Rear dormer to create habitable roofspace; three rooflights in front roofslope

  Refused Householder Loft or dormer 11 docs
  Domestic

• PL/1786/26 Status unknown

  23 Stuart Road, Wealdstone, Harrow, HA3 7RB

  Conversion of detached garage at rear to provide a single storey dwelling house ( 1 x 1 bed); Replace garage doors with door and window in front elevation; Replace door with window in side elevation; External alterations; Cycle and Refuse storage

  30 Jun 2026 Full applications
• PL/1784/26 Status unknown

  14 Treve Avenue, West Harrow, Harrow, HA1 4AJ

  Conversion of existing 6-bed 6-person HMO into 7-bed 8-person HMO with associated bin and cycle storage

  30 Jun 2026 Full applications
• PL/1777/26 Status unknown

  11 London Road, Harrow, HA1 3JJ

  Refurbishment and replacement of windows and door to the basement and ground floor front, side and rear elevations

  29 Jun 2026 Full applications
• PL/1743/26 Status unknown

  49 Kings Way, Harrow, HA1 1XT

  Single and two storey side extension; external alterations: Conversion of dwellinghouse (C3) into a 6 person HMO (C4); refuse / cycle storage (demolition of attached garage)

  25 Jun 2026 Full applications
• PL/1710/26 Status unknown

  4 Kenton Road, Kenton, Harrow, HA1 2BL

  Conversion of dwelling (C3) into house of multiple occupancy for up to 6 persons (Sui Generis)

  22 Jun 2026 Full applications