23 Portsmouth Road Kingston Upon Thames KT1 2NA

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

• 26/00971/CPUF Granted

  23 Portsmouth Road Kingston Upon Thames KT1 2NA

  Erection of single storey rear extension and installation of 7nos. rooflights to facilitate loft conversion

  Decided 14 May 2026 Lawful development

1. 24 Jun 2026

   Received by Kingston upon Thames

2. 28 Jul 2026

   Validated

   Checked as complete and ready for consideration.

3. 11 Aug 2026

   Added to PlanIndex

4. 17 Sep 2026

   Decision issued: Refuse

5. 17 Sep 2026

   Status changed to Refused

   Previously Pending Consideration.

Kingston 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.

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

• Waterside 21 Portsmouth Road Kingston Upon Thames KT1 2NA

  20/03216/NMA Submitted 14 Dec 2020 50 yards away

  Non Material Amendment to Planning Permission 20/00415/HOU (Erection of double storey side and rear extension, loft conversion with 3no dormer windows and addition of Juliet balcony to front elevation.) to provide partial single storey rear extension with addition of three garden facing windows and bi-folding doors to internal side elevation and addition of Velux window to rear elevation

  Refused Amendments Extension Loft or dormer +1 17 docs
  Small domestic

• Waterside 21 Portsmouth Road Kingston Upon Thames KT1 2NA

  21/02518/FUL Submitted 4 Aug 2021 50 yards away

  Application under Section 73 of the Town and Country Planning Act 1990 to carry out development without compliance with Condition 1 (Approved Plans) of Planning Permission ref: 20/00415/HOU (Erection of double storey side and rear extension, loft conversion with 3no dormer windows and addition of Juliet balcony to front elevation) dated 30/04/2020. Variation to include approved window to side elevation to be increased in height increasing the use of natural light to both Ground and first floor stair lobby

  Granted Full applications Extension Loft or dormer +1 5 docs

• Waterside 21 Portsmouth Road Kingston Upon Thames KT1 2NA

  21/03236/FUL Submitted 8 Oct 2021 50 yards away

  Application under Section 73 of the Town and Country Planning Act 1990 to carry out development without compliance with Condition 1 (Approved Plans) of Planning Permission ref: 20/00415/HOU (Erection of double storey side and rear extension, loft conversion with 3no dormer windows and addition of Juliet balcony to front elevation) dated 06/01/2021. Variation to include replacing skylight to the loft front elevation to dormer matching the side and rear elevations

  Refused Full applications Extension Loft or dormer +1 11 docs

• Waterside 21 Portsmouth Road Kingston Upon Thames KT1 2NA

  20/00415/HOU Submitted 20 Feb 2020 50 yards away

  Erection of double storey side and rear extension, loft conversion with 3no dormer windows and addition of Juliet balcony to front elevation.

  Granted Householder Extension Loft or dormer +1 15 docs
  Domestic

• Waterside 21 Portsmouth Road Kingston Upon Thames KT1 2NA

  21/00709/FUL Submitted 8 Mar 2021 50 yards away

  Application under Section 73 of the Town and Country Planning Act 1990 to carry out development without compliance with Condition 1 (Approved Plans) of Planning Permission ref 20/00415/HOU (Erection of double storey side and rear extension, loft conversion with 3no dormer windows and addition of Juliet balcony to front elevation) to allow for the following changes to size of extensions, changes to fenestration and internal alterations

  Granted Full applications Extension Loft or dormer +1 17 docs

• Waterside 21 Portsmouth Road Kingston Upon Thames KT1 2NA

  21/02113/FUL Submitted 30 Jun 2021 50 yards away

  Application under Section 73 of the Town and Country Planning Act 1990 to carry out development without compliance with Condition 1 (Approved Plans) of Planning Permission ref: 20/00415/HOU (Erection of double storey side and rear extension, loft conversion with 3no dormer windows and addition of Juliet balcony to front elevation). Variation to include changes to fenestration

  Withdrawn Full applications Extension Loft or dormer +1 5 docs

• 26/01675/FUL Refused

  40B And 40C Clarence Street Kingston Upon Thames KT1 1NR

  Conversion of commercial floorspace (Use Class E) at first floor level and house in multiple occupation unit (Use Class C4) at second and third floor levels to 3nos. residential dwellings (Use Class C3). Erection of 3nos. front dormer roof extensions and alterations to existing rear dormers. Installation of first floor rear terrace and 2nos. second floor rear balconies. Changes to fenestrations.

  Received 30 Jul, published by the council 3 Sep 2026 Full applications
• 26/01693/FUL Granted

  63 - 69 Kingston Road New Malden KT3 3PB

  Repair and reinstatement of the external envelope including brickwork reconstruction, rendered band, parapet replacement, gas main enclosure and window alterations (Part retrospective)

  Received 31 Jul, published by the council 1 Sep 2026 Full applications
• 26/02148/FUL Awaiting decision

  County Hall Developemnt Site Penrhyn Road Kingston Upon Thames KT1 2EA

  Application under Section 19 of the Planning (Listed Buildings and Conservation Areas) Act 1990 to vary Condition 15 (Conservation Management Plan) of application reference 21/03970/LBC (Listed Building Consent for the refurbishment, restoration and extension of the County Hall (Grade II*) to provide flexible commercial use (class E) and residential use (class C3), demolition of The Canteen Building and The Computer Wing Building, erection of replacement buildings of between 2 and 6 storeys for residential use (class C3), alterations to the existing boundary including Nos. 5 & 7 Milner Road, new means of access, associated public realm and landscaping, highway works, car and cycle parking and all ancillary and associated work (Amended Description, Amended Plans and Additional Information Received)) dated 22/09/2023. Variation to amend the trigger for the submission and approval of the Conservation Management Plan.

  Received 8 Oct, published by the council 21 Oct 2026 Full applications
• 26/02145/FUL Awaiting decision

  1 Fassett Road Kingston Upon Thames KT1 2TD

  Enlargement of the existing large House in Multiple Occupation (Use Class Sui generis) through erection of part first and second floor rear extensions and upwards roof extension with dormers and rooflights to create additional floor with associated internal alterations.

  Received 7 Oct, published by the council 21 Oct 2026 Full applications
• 26/02135/FUL Awaiting decision

  18 The Mount New Malden KT3 4HU

  Application under Section 73 of the Town and Country Planning Act 1990 to carry out development without compliance with Condition 1 (Approved drawings) for Application Reference Number: 26/01548/HOU (Erection of a single storey rear extension.) dated 17/09/2026. Variation to add a window to the right side elevation of the proposed extension.

  Received 6 Oct, published by the council 20 Oct 2026 Full applications