97 Merrion Avenue, Stanmore, Harrow, HA7 4RY

1. 6 Feb 2026

   Received by Harrow

2. 12 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 3 April 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

• 97 Merrion Avenue, Stanmore, Harrow, HA7 4RY

  PL/0334/26 Submitted 6 Feb 2026 0m away

  Decision due ~3 Apr

  Single storey rear extension: 6.00 metres deep, 3.90 metres maximum height and 2.50 metres high to the eaves

  Status unknown Prior approval Extension
  Small domestic

• 98A Merrion Avenue, Stanmore, Harrow, HA7 4RU

  PL/2166/24 Submitted 6 Aug 2024 38m away

  Single storey front extension incorporation front porch, Two storey side extension, Single storey rear extension, Alterations to roof to raise ridge height, Rooflights in both side and rear roof slopes, External alterations (Demolition of side and rear extensions)

  Refused Householder Extension Loft or dormer +2
  Small domestic

• 38 Craigweil Drive, Stanmore, Harrow, HA7 4TU

  PL/2414/24 Submitted 2 Sep 2024 118m away

  Certificate of Lawful Development (Proposed): Alterations to roof to form gable end, rear dormer, 3 No. rooflights to front elevation, 1 No. window to east elevation

  Granted Lawful development Loft or dormer Windows or glazing

• 17 Sandymount Avenue, Stanmore, Harrow, HA7 4UA

  PL/1766/26 Submitted 29 Jun 2026 159m away

  Decision due ~24 Aug

  Vehicle access

  Status unknown Householder
  Domestic

• 110 Merrion Avenue, Stanmore, Harrow, HA7 4RX

  P/5352/16 Submitted 15 Nov 2016 207m away

  Invalid

  Withdrawn Full applications

• 112 Merrion Avenue, Stanmore, HA7 4RX

  P/1834/18 Submitted 30 Apr 2018 207m away

  Single storey rear extension

  Granted Householder Extension 13 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

  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