9 Mallet Drive, Northolt, Harrow, UB5 4BE

1. 7 Apr 2025

   Received by Harrow

2. 2 Sep 2026

   Added to PlanIndex

Harrow granted permission, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 21 Mallet Drive, Northolt, UB5 4BE

  P/3887/08 Submitted 28 Nov 2008 50 yards away

  Certificate of lawful proposed development: two-storey rear extension

  Refused Lawful development Extension 10 docs

• 20 Mallet Drive, Northolt, Harrow, UB5 4BE

  PL/2463/25 Submitted 22 Sep 2025 50 yards away

  Conversion of Semi-Detached dwelling into Two Separate Dwellings (1x2 bed and 1x3 bed); provision of cycle parking and bin storage, subdivision of amenity space including new front porch to No. 20A and creation of a crossover

  Refused Full applications New dwelling Extension
  Small domestic

• 20 Martin Drive, Northolt, UB5 4BG

  P/72/06/DFU Submitted 10 Jan 2006 50 yards away

  Alterations single storey rear extension and conversion to two self-contained flats

  Granted Full applications New dwelling Extension 28 docs
  Small domestic

• 10 Martin Drive, Northolt, UB5 4BG

  P/1210/18 Submitted 22 Mar 2018 50 yards away

  Certificate of lawful development (proposed): single storey rear extension

  Granted Lawful development Extension 9 docs
  Small domestic

• 10 Martin Drive, Northolt, Harrow, UB5 4BG

  P/0512/18 Submitted 6 Feb 2018 50 yards away

  CERTIFICATE OF LAWFUL PROPOSED DEVELOPMENT: Single storey rear extension

  Withdrawn Lawful development Extension 5 docs
  Small domestic

• 10 Martin Drive, Northolt, UB5 4BG

  P/5083/17/PRIOR Submitted 8 Nov 2017 50 yards away

  Single storey rear extension: extending 6 metres beyond the original rear wall 3 metres maximum height 3 metres high to the eaves

  Granted Householder Extension 16 docs
  Small domestic

• PL/1761/26 Status unknown

  1 Middle Road, Harrow On The Hill, Harrow, HA2 0HW

  Certificate of lawful development (proposed): Replacement of ground floor front bay window

  Received 29 Jun, published by the council 12 Aug 2026 Lawful development
• PL/1772/26 Status unknown

  114 Somervell Road, South Harrow, Harrow, HA2 8TT

  Certificate of Lawful Proposed Development: Demolition and replacement of first floor level and roof

  Received 29 Jun, published by the council 12 Aug 2026 Lawful development
• PL/1735/26 Status unknown

  222 Malvern Avenue, South Harrow, Harrow, HA2 9HE

  Certificate of lawful development (proposed): Rear dormer; installation of rooflight in front roofslope

  Received 24 Jun, published by the council 12 Aug 2026 Lawful development
• PL/1716/26 Status unknown

  59 Leamington Crescent, South Harrow, Harrow, HA2 9HH

  Certificate of Lawful Development (Proposed): Garden room with garden tools storage at rear (demolition of detached garage)

  Received 22 Jun, published by the council 12 Aug 2026 Lawful development
• PL/1696/26 Status unknown

  31 Chandos Road, Harrow, HA1 4QX

  Certificate of Lawful Development (Proposed): Alterations and extension to roof to form end gable; rear dormer; two rooflights in front roof slope; window in end gable

  Received 22 Jun, published by the council 12 Aug 2026 Lawful development