23 Upper Grotto Road Twickenham TW1 4NG

1. 26 Aug 2026

   Received by Richmond upon Thames

2. 28 Aug 2026

   Validated

   Checked as complete and ready for consideration.

3. 8 Sep 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 23 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 46 days over the applications it decided in the last year.

This application is with Richmond upon Thames for determination, against a statutory target of eight weeks. Over the last year Richmond upon Thames decided householder applications in a median of 56 days. More in our guide to how long planning decisions take.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 23 Upper Grotto Road Twickenham Richmond Upon Thames TW1 4NG

  04/3560/PS192 Submitted 2 Nov 2004 50 yards away

  Proposed Loft Conversion With Rear Dormer And Extension Over Rear Section.

  Granted Prior approval Extension Loft or dormer 8 docs

• 19 Upper Grotto Road Twickenham Richmond Upon Thames TW1 4NG

  05/2495/HOT Submitted 16 Aug 2005 50 yards away

  Proposed restructuring and extension to roof to provide a third floor to house.

  Refused Householder Extension 6 docs
  Domestic

• 27 Upper Grotto Road Twickenham TW1 4NG

  23/0269/HOT Submitted 30 Jan 2023 50 yards away

  Demolition of conservatory and single-storey WC to rear. Construction of new single-storey rear extension.

  Granted Householder Extension Demolition 15 docs
  Small domestic

• 28, Upper Grotto Road, Twickenham, TW1 4NF

  PA26/1520 Submitted 5 May 2026 50 yards away

  Installation of air conditioning heat pump split system.

  Granted Prior approval 12 docs

• 24 Upper Grotto Road Twickenham TW1 4NF

  19/3113/VRC Submitted 15 Oct 2019 50 yards away

  Variation of condition U66223 (Approved Drawings) of planning permission 19/1735/HOT to allow for amendments to roof of approved side/rear extension and increase height of boundary wall with no. 26

  Granted Amendments Extension 7 docs
  Small domestic

• 34 Upper Grotto Road Twickenham TW1 4NF

  PA25/4267 Submitted 27 Nov 2025 50 yards away

  Proposed single storey rear / side extension.

  Granted Householder Extension 17 docs
  Small domestic

• PA26/2361 Refused

  11, Waterloo Place, Richmond, TW9 1EB

  Single storey rear extension to replace existing rear extension.

  Received 6 Jul, published by the council 26 Jul 2026 Householder
• PA26/2869 Refused

  60, Castelnau, London, SW13 9EX

  Improvements to the front elevation, replacement of the coach house, replacement of the rear extensions, first and second floor rear extension and new basement excavation.

  Received 18 Aug, published by the council 23 Aug 2026 Householder
• PA26/2821 Granted

  192A, Sheen Lane, London, SW14 8LF

  Alterations to the existing dwelling, including enlarging existing window and door openings, replacement windows and doors, new rooflight openings, replacement rooflights in existing openings, rendering the external brickwork, installation of an air source heat pump, air conditioning unit and photovoltaic panels, installation of woodburner flue, removal of the brick chimney stack at roof level and replacement of a brick garden wall with a timber screen.

  Received 13 Aug, published by the council 23 Aug 2026 Householder
• PA26/2256 Refused

  36A Cambridge Park Twickenham TW1 2JU

  Erection of a detached domestic garage to serve the existing dwelling, positioned toward the front/side of the plot and associated frontage boundary alterations including replacement wall/fence/hedging treatment.

  Received 29 Jun, published by the council 23 Aug 2026 Householder
• PA26/2671 Granted

  30, The Avenue, Twickenham, TW1 1RY

  Demolition of garage, ground floor rear extension, ground floor side extension, new conservation rooflights to main roof and removal of one window.

  Received 31 Jul, published by the council 6 Aug 2026 Householder