16, Cornwall Road, Twickenham, TW1 3LS

1. 25 Feb 2026

   Received by Richmond upon Thames

2. 6 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 29 Apr 2026

   Decision issued: Granted Permission

4. 13 Aug 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

• 15 Cornwall Road Twickenham TW1 3LS

  PA25/4004 Submitted 6 Nov 2025 30m away

  Construction of single storey rear and side infill extension

  Granted Householder Extension 15 docs
  Small domestic

• 3 Cornwall Road Twickenham TW1 3LS

  PA26/1501 Submitted 30 Apr 2026 46m away

  Rear dormer loft conversion and installation of 4 roof lights.

  Granted Prior approval Loft or dormer 12 docs

• 51 And 53 And 55 Arragon Road Twickenham

  23/0282/FUL Submitted 30 Jan 2023 58m away

  Proposed additional storey to 3 properties

  Granted Full applications 16 docs

• 55, York Street, Twickenham, TW1 3LP

  PA26/1311 Submitted 14 Apr 2026 61m away

  81% historically approved · decision due ~9 Jun

  THREE EXTERNALLY ILLUMINATED FASCIA SIGNS; EXTERNALLY ILLUMINATED PERPENDICULAR SIGN TO RESTAURANT PREMISES

  Awaiting decision Advertising 10 docs

• 13 Oak Lane Twickenham Richmond Upon Thames TW1 3PA

  06/0980/HOT Submitted 3 Apr 2006 69m away

  Single storey rear extension and roof extension with rear dormer and front rooflight.

  Withdrawn Householder Extension Loft or dormer 7 docs
  Small domestic

• 37 - 39 York Street Twickenham TW1 3LP

  21/1964/FUL Submitted 31 May 2021 71m away

  Alterations to shopfront and fenestration including installation of awnings.

  Granted Full applications Windows or glazing 10 docs

• PA26/2452 Refused

  50 Fairfax Road Teddington TW11 9BZ

  Roof extension to create additional loft storey. Increase in height to eaves and ridge to part of existing roof.

  13 Jul 2026 Householder
• PA26/3078 Awaiting decision

  64 FIRST AVENUE MORTLAKE LONDON SW14 8SR

  The demolition of the existing ground floor rear extension, construction of replacement ground floor rear extension and replacement windows to the rear of the property.

  4 Sep 2026 Householder
• PA26/3057 Awaiting decision

  23, Manderlea, The Avenue, Hampton, TW12 3RN

  Single storey rear extension, single storey side extension, and the installation of an air conditioning unit

  3 Sep 2026 Householder
• PA26/3068 Awaiting decision

  27 Ranelagh Avenue Barnes London SW13 0BL

  Single storey side return with a sloping rooflight. Incl replacement windows throughout.

  3 Sep 2026 Householder
• PA26/3067 Awaiting decision

  27 Ranelagh Avenue Barnes London SW13 0BL

  Rear mansard roof extension.

  3 Sep 2026 Householder