18, Strathearn Avenue, Twickenham, TW2 6JU

1. 7 Aug 2026

   Received by Richmond upon Thames

2. 13 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 2 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Richmond upon Thames took a median of 45 days over the applications it decided in the last year.

This application is with Richmond upon Thames for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

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

• 16 Strathearn Avenue Twickenham TW2 6JU

  19/3235/PDE Submitted 22 Oct 2019 10m away

  Single-storey rear extension (4m depth, 3.2m eaves height, 3.2m maximum height).

  Withdrawn Prior approval Extension 5 docs
  Small domestic

• 12, Strathearn Avenue, Twickenham, TW2 6JU

  PA25/3519 Submitted 7 Oct 2025 30m away

  First Floor Side Extension, Conversion of Garage to Habitable Accommodation, Alterations to Roof including Increase in Ridge Height and Rear Dormer, Alterations to Elevations, And All Associated Works

  Refused Householder Extension Loft or dormer +1 24 docs
  Domestic

• 12, Strathearn Avenue, Twickenham, TW2 6JU

  PA25/3488 Submitted 3 Oct 2025 30m away

  First Floor Side Extension, Conversion of Garage to Habitable Accommodation, Alterations to Elevations, And All Associated Works

  Refused Householder Extension 25 docs
  Domestic

• 12, Strathearn Avenue, Twickenham, TW2 6JU

  PA26/0760 Submitted 4 Mar 2026 30m away

  Proposed garage conversion to habitable room with new flat roof over and front elevation set back.

  Granted Householder 9 docs
  Small domestic

• 12, Strathearn Avenue, Twickenham, TW2 6JU

  PA26/1523 Submitted 5 May 2026 30m away

  Details pursuant to Condition C4 - Construction Management Plan, of planning permission PA26/0760.

  Granted Conditions 6 docs

• 5 Blandford Avenue Twickenham Richmond Upon Thames TW2 6HS

  05/2375/HOT Submitted 4 Aug 2005 72m away

  Single Storey Front And Side Extension And New Conservatory To Rear.

  Granted Householder Extension 4 docs
  Small domestic

• PA26/2437 Granted

  119 Hampton Road Twickenham TW2 5QN

  Erection of a single-storey rear extension and associated internal alterations.

  13 Jul 2026 Prior approval
• PA26/2424 Granted

  45 Selkirk Road Twickenham

  Flat roof rear box dormer extension with wall tiles to match existing roof.

  10 Jul 2026 Prior approval
• PA26/2409 Granted

  15 Tudor Road Hampton TW12 2NH

  Proposed single storey rear extension and rear ground floor opening alterations.

  9 Jul 2026 Prior approval
• PA26/2615 Granted

  30, Jubilee Avenue, Twickenham, TW2 6JB

  Loft conversion with roof extension and proposed out building in the rear garden.

  27 Jul 2026 Prior approval
• PA26/3058 Awaiting decision

  253, Staines Road, Twickenham, TW2 5AY

  Prior approval for larger household extension (6m depth, 2.3m eaves height, 4m overall height)

  2 Sep 2026 Prior approval