15 Marlborough Hill, Harrow, HA1 1TX

1. 28 Apr 2026

   Received by Harrow

2. 12 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 23 June 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.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• 49 Kings Way, Harrow, HA1 1XT

  PL/0846/26 Submitted 25 Mar 2026 68m away

  Decision due ~20 May

  Single and two storey side extension; Removal of door in ground floor rear elevation; Replacement door in ground floor rear elevation: External alterations (Demolition of attached garage)

  Status unknown Householder Extension Demolition
  Domestic

• 49 Kings Way, Harrow, HA1 1XT

  PL/0750/26 Submitted 18 Mar 2026 68m away

  Decision due ~13 May

  Certificate of lawful development (proposed): Change of use from dwelling (Use class C3) to house of multiple occupancy (HMO) for upto 6 persons (Use class C4)

  Status unknown Lawful development
  Domestic

• 49 Kings Way, Harrow, HA1 1XT

  PL/1743/26 Submitted 25 Jun 2026 68m away

  Decision due ~20 Aug

  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)

  Status unknown Full applications Extension Demolition
  Domestic

• 58 Kings Way, Harrow, HA1 1XU

  P/1637/21/PRIOR Submitted 19 Apr 2021 98m away

  Single Storey Rear Extension: 6.00 metres deep, 3.45 metres maximum height, 2.68 metres high to the eaves

  Granted Prior approval Extension 9 docs
  Small domestic

• 44 Kings Way, Harrow, HA1 1XU

  P/3811/21 Submitted 14 Sep 2021 98m away

  CERTIFICATE OF LAWFUL DEVELOPMENT (PROPOSED):

  Granted Lawful development 12 docs

• 1 Sparkbridge Road, Harrow, HA1 1TJ

  PL/0248/24 Submitted 31 Jan 2024 99m away

  First floor rear extension

  Refused Householder Extension
  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

  29 Jun 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

  29 Jun 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

  24 Jun 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)

  22 Jun 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

  22 Jun 2026 Lawful development