6 CASSILIS ROAD TWICKENHAM TW1 1RU

1. 17 Feb 2026

   Received by Richmond upon Thames

2. 10 Apr 2026

   Decision issued: Refused Permission

3. 13 Aug 2026

   Added to PlanIndex

Richmond upon Thames refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. More in our guide to what happens after a planning decision.

This application deals with conditions on an existing permission, supplying the details a condition requires or asking to vary or remove one, without reopening the permission itself. More in our guide to planning application types.

• 8 Cassilis Road Twickenham Richmond Upon Thames TW1 1RU

  05/1028/HOT Submitted 7 Apr 2005 50 yards away

  Proposed loft conversion with two rear dormers

  Granted Householder Loft or dormer 5 docs
  Domestic

• 10 Cassilis Road Twickenham Richmond Upon Thames TW1 1RU

  04/3558/HOT Submitted 1 Nov 2004 50 yards away

  Proposed Loft Conversion To Form Habitable Room.

  Refused Householder Loft or dormer 4 docs
  Domestic

• 10 Cassilis Road Twickenham Richmond Upon Thames TW1 1RU

  05/0381/HOT Submitted 7 Feb 2005 50 yards away

  Proposed Loft Conversion To Form Habitable Room.

  Granted Householder Loft or dormer 7 docs
  Domestic

• 4 Heathcote Road Twickenham Richmond Upon Thames TW1 1RX

  05/2150/HOT Submitted 18 Jul 2005 50 yards away

  Erection Of A Conservatory To Rear.

  Granted Householder Extension 6 docs
  Small domestic

• 20 Cassilis Road Twickenham TW1 1RU

  22/3608/HOT Submitted 5 Dec 2022 50 yards away

  Reconstruction of dilapidated boundary wall, crossover for driveway for car parking and electric vehicle charging together with associated landscaping alterations.

  Withdrawn Householder 11 docs
  Small domestic

• 130, St Margarets Road, Twickenham, TW1 1RL

  PA26/2526 Submitted 20 Jul 2026 100 yards away

  77% historically approved · decision due ~9 Oct

  Replace RAAC roof deck with a lightweight, supported roof system. New windows. Upgrade and replicate original parapet, capping, and coping details. Introduce water management improvements. Reproduce V-grooved ceiling profile. Improve roof drainage.

  Awaiting decision Full applications Windows or glazing 23 docs

• PA26/3417 Awaiting decision

  The Manor House, Ham Street, Ham, Richmond Upon Thames, TW10 7HA

  Details pursuant to Condition 4 Part 2 and Part 3 (External Details) of planning reference PA25/4108

  Received 8 Oct, published by the council 12 Oct 2026 Conditions
• PA26/3447 Awaiting decision

  KNELLER HALL ROYAL MILITARY SCHOOL OF MUSIC KNELLER ROAD TWICKENHAM TW2 7DU

  Details pursuant to condition 5 - Sample panels of brickwork (heritage assets) of listed building consent 22/3005/LBC.

  Received 8 Oct, published by the council 12 Oct 2026 Conditions
• PA26/2656 Granted

  19, Ellerker Gardens, Richmond, TW10 6AA

  Details pursuant to conditions C6. Submitted Arboricultural details, C8. Door, C9. Stained glass window and stained glass panel of planning reference PA26/0116

  Received 30 Jul, published by the council 6 Aug 2026 Conditions
• PA26/3415 Awaiting decision

  Parkway House, Sheen Lane, London

  Details pursuant to Condition C12. Cycle Parking and Condition C15. Hard Landscaping of planning reference PA25/2106

  Received 7 Oct, published by the council 12 Oct 2026 Conditions
• PA26/3177 Granted

  2, Everdon Road, London, SW13 9AH

  Details pursuant to condition BD13A - materials of planning reference 23/0145/FUL

  Received 11 Sep, published by the council 17 Sep 2026 Conditions