23, Copthall Gardens, Twickenham, TW1 4HH

This site has had 2 applications since 2026: 0 approved, 1 refused.

• PA26/2570 Refused

  23, Copthall Gardens, Twickenham, TW1 4HH

  Certificate of Lawful Development for the construction of a rear roof dormer and the installation of three rooflights.

  Decided 21 Sep 2026 Prior approval

1. 28 Sep 2026

   Received by Richmond upon Thames

2. 3 Oct 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 23 November 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 prior approval applications in a median of 43 days. More in our guide to how long planning decisions take.

Prior approval applies where permitted development rights already grant the principle of the work, leaving the council only the specific matters the rules name, commonly within 56 days. More in our guide to planning application types.

• 23, Copthall Gardens, Twickenham, TW1 4HH

  PA26/2570 Submitted 23 Jul 2026 50 yards away

  Certificate of Lawful Development for the construction of a rear roof dormer and the installation of three rooflights.

  Refused Prior approval Loft or dormer 20 docs

• 19 Copthall Gardens Twickenham TW1 4HH

  PA26/0509 Submitted 16 Feb 2026 50 yards away

  L-Shaped Dormer Loft conversion and installation of three roof lights on the front roof slope

  Granted Prior approval Loft or dormer 14 docs

• 19, Copthall Gardens, Twickenham, TW1 4HH

  PA26/1624 Submitted 11 May 2026 50 yards away

  Removal of existing extension and construction of a new single storey rear extension.

  Granted Householder Extension 10 docs
  Small domestic

• 17 Copthall Gardens Twickenham Richmond Upon Thames TW1 4HH

  04/3363/HOT Submitted 18 Oct 2004 50 yards away

  Proposed loft extension

  Refused Householder Extension Loft or dormer 7 docs
  Domestic

• 17 Copthall Gardens Twickenham Richmond Upon Thames TW1 4HH

  04/4044/PS192 Submitted 23 Dec 2004 50 yards away

  Loft extension.

  Granted Prior approval Extension Loft or dormer 7 docs

• 31 Copthall Gardens Twickenham Richmond Upon Thames TW1 4HH

  04/3848/HOT Submitted 2 Dec 2004 50 yards away

  Loft conversion and new rear dormer

  Granted Householder Loft or dormer 4 docs
  Domestic

• PA26/2683 Granted

  3, Pauline Crescent, Twickenham, TW2 6JD

  Single storey rear extension

  Received 31 Jul, published by the council 13 Aug 2026 Prior approval
• PA26/3420 Awaiting decision

  129 Lower Mortlake Road Richmond TW9 2LP

  Conversion of existing loftspace into habitable rooms with dormers to rear over main house and offshot

  Received 8 Oct, published by the council 12 Oct 2026 Prior approval
• PA26/3160 Granted

  2A Station Road Hampton Wick Middlesex KT1 4HG

  Repair of the front dormer cheeks, involving the replacement of the existing hanging slates with traditional lead.

  Received 11 Sep, published by the council 24 Sep 2026 Prior approval
• PA26/3423 Awaiting decision

  95 Selkirk Road Twickenham TW2 6PT

  Construction of single storey rear extension, 4.3m in depth, 3m in height and 3m in height to eaves.

  Received 6 Oct, published by the council 12 Oct 2026 Prior approval
• PA26/3389 Awaiting decision

  39, Shacklegate Lane, Teddington, TW11 8SF

  The existing 4.55 m deep ground-floor rear extension is to be extended by 1.45 m. The existing pitched roof will also be extended, with the overall height remaining unchanged (6m overall depth, 2.41m eaves height, 3.78m overall height).

  Received 5 Oct, published by the council 6 Oct 2026 Prior approval