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Rear basement extension, a new bay window to the side elevation, new oriel window to the rear elevation, new structural glass over the two existing front lightwell along with window and rooflight alterations throughout.

29 Castelnau Barnes Richmond Upon Thames SW13 9RS

The decision has been made on the application.Reference: PA26/0683London Borough of Richmond upon Thames

Last published check: 4 Oct 2026, 12:24. Check the council record for more recent changes.

Application location

29 Castelnau Barnes Richmond Upon Thames SW13 9RS

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Application summary

Status
The decision has been made on the application.
Application type
Householder Application
Received
27 Feb 2026
Validated
8 Apr 2026
Determination deadline
3 Jun 2026
Local authority
London Borough of Richmond upon Thames

Application overview

Rear basement extension, a new bay window to the side elevation, new oriel window to the rear elevation, new structural glass over the two existing front lightwell along with window and rooflight alterations throughout.

Proposal details

Reference
PA26/0683
Alternative references
PP-14685905
Ward
Barnes Ward [BRN]
Agent
Burnham
UPRN
100022290449

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Documents 40 of 40

DocumentPublishedAction
Application Form - Without Personal DataApplication Form - Redacted27 Feb 2026View
The location plan 29C_01_001Submitted Drawing27 Feb 2026View
Existing/Proposed Block Plan 29C_02_101Superseded Drawing27 Feb 2026View
Fire Safety StrategyReport27 Feb 2026View
CIL FORMCommunity Infrastructure Levy Form27 Feb 2026View
Flood risk assessmentReport27 Feb 2026View
Heritage StatementReport27 Feb 2026View
Design and access statementReport27 Feb 2026View
Existing Basement PlanSuperseded Drawing27 Feb 2026View
Exisitng Section CCSuperseded Drawing27 Feb 2026View
Existing Seciton DDSuperseded Drawing27 Feb 2026View
Existing Ground Floor PlanSuperseded Drawing27 Feb 2026View
Existing First & Second Floor PlanSuperseded Drawing27 Feb 2026View
Existing Roof PlanSuperseded Drawing27 Feb 2026View
Existing Front & Rear ElevationSuperseded Drawing27 Feb 2026View
Existing North Side ElevationSuperseded Drawing27 Feb 2026View
Existing South Side ElevationSuperseded Drawing27 Feb 2026View
Existing Section AASuperseded Drawing27 Feb 2026View
Existing Section BBSuperseded Drawing27 Feb 2026View
Proposed Basement PlanSuperseded Drawing27 Feb 2026View
Proposed Section CCSuperseded Drawing27 Feb 2026View
Proposed Ground Floor PlanSuperseded Drawing27 Feb 2026View
Proposed First & Second Floor PlanSuperseded Drawing27 Feb 2026View
Proposed Roof PlanSuperseded Drawing27 Feb 2026View
Proposed Front & Rear ElevationSuperseded Drawing27 Feb 2026View
Proposed North Side ElevationSuperseded Drawing27 Feb 2026View
Proposed SOuth Side ELevationSuperseded Drawing27 Feb 2026View
Proposed Section AASuperseded Drawing27 Feb 2026View
Proposed Seciton BBSuperseded Drawing27 Feb 2026View
Basement Impact Assessment (BIA)Report8 Apr 2026View
Proposed DrawingsSuperseded Drawing13 Apr 2026View
29C_Proposed Plans Rev FSuperseded Drawing13 May 2026View
Proposed Window DetailsRevised Drawing29 May 2026View
29C_Proposed Plans Rev HRevised Drawing2 Jun 2026View
Proposed Basemnet Plan garden size comparisonDrawing2 Jun 2026View
Basement Impact Assessment RevisedReport4 Aug 2026View
Existing Site Plans 29CRevised Drawing13 May 2026View
Construction Management PlanReport6 Aug 2026View
Officer ReportReport1 Sept 2026View
DecisionDecision Notice1 Sept 2026View

Documents open on the council website. Browse council documents if a link has changed.

Application timeline

Council milestones and published deadlines. A deadline passing does not confirm a decision.

  1. Application date

    Published milestoneCouncil source

  2. Received date

    Published milestoneCouncil source

  3. Registration date

    Published milestoneCouncil source

  4. Valid date

    Published milestoneCouncil source

  5. Press notice start date

    Published milestoneCouncil source

  6. Site notice date

    Published milestoneCouncil source

  7. Publicity end date

    Past published deadline

    A published target or deadline. It does not confirm an outcome.

    Council source

  8. Site notice end date

    Past published deadline

    A published target or deadline. It does not confirm an outcome.

    Council source

  9. Decision due date

    Past published deadline

    A published target or deadline. It does not confirm an outcome.

    Council source

  10. Consultation expiry date

    Past published deadline

    A published target or deadline. It does not confirm an outcome.

    Council source

  11. Statutory expiry date

    Past published deadline

    A published target or deadline. It does not confirm an outcome.

    Council source

  12. Dispatch date

    Published milestoneCouncil source

  13. Decision date

    Published milestoneCouncil source

  14. Extension date

    Past published deadline

    A published target or deadline. It does not confirm an outcome.

    Council source

  15. Decision expiry date

    Published deadline

    A published target or deadline. It does not confirm an outcome.

    Council source

Decision & conditions

Granted Permission
Decision
Planning conditions
  1. The development to which this permission relates must be begun not later than the expiration of three years beginning with the date of this permission. REASON: To conform with the requirements of Section 91 of the Town and Country Planning Act 1990 as amended by the Planning and Compulsory Purchase Act 2004.
  2. No new external finishes (including fenestration), including works of making good, shall be carried out other than in materials to match the existing, except where indicated otherwise on the submitted application form and/or approved drawings. REASON: To ensure that the proposed development is in keeping with the existing building and does not prejudice the appearance of the locality.
  3. The development hereby permitted shall be carried out in accordance with the following approved plans and documents, where applicable. The location plan 29C_01_001 Flood Risk Assessment Received 27 February 2026, and Existing Basement Floor Plan 29C_03_000 Existing Ground Floor Plan 29C_03_001 Existing First and Second Floor Plans 29C_03_002 Existing Roof Plan 29C_03_003 Existing Front and Rear Elevations 29C_05_001 Existing Side Elevation North Facing 29C_05_002 Existing Side Elevation South Facing 29C_05_003 Existing Section AA 29C_04_001 Existing Section BB 29C_04_002 Existing Section CC 29C_04_003 Existing Section DD 29C_04_004 Received 13 May 2026, and Proposed Bay Window 29C_06_101 Proposed Bay Window details 29C_06_102 Received 29 May 2026, and Proposed Basement Floor Plan 29C_03_100 Rev H Proposed Ground Floor Plan 29C_03_101 Rev H Proposed First and Second Floor Plans 29C_03_102 Rev H Proposed Roof Plan 29C_03_103 Rev H Proposed Front and Rear Elevations 29C_05_101 Rev H Proposed Side Elevation North Facing 29C_05_102 Rev H Proposed Side Elevation South Facing 29C_05_103 Rev H Proposed Section AA 29C_04_101 Rev H Proposed Section BB 29C_04_102 Rev H Proposed Section CC 29C_04_103 Rev H Proposed Section DD 29C_04_103 Rev H Received 02 June 2026, and Construction Management Plan, dated 05 Agusut 2026 and received 06 August 2026 REASON: To accord with the terms of the application, for the avoidance of doubt and in the interests of proper planning.
  4. The development must be carried out in accordance with the provisions of the Fire Safety Strategy received 27 February 2026 unless otherwise approved in writing by the Local Planning Authority. REASON: To ensure that the development incorporates the necessary fire safety measures in accordance with the Mayor's London Plan Policy D12.
  5. During onsite construction of any phase of development, all non-road transportable industrial equipment or vehicles which are fitted with an internal diesel powered compression ignition engine between 37 and 560KW and not intended for transporting goods or passengers on roads are required to meet Stage IIIB of EU Directive 97/68/E and be NRMM registered. Such vehicles must be run on ultra low sulphur diesel (also known as ULSD 'cleaner diesel' or 'green diesel'). 'Ultra low sulphur diesel' means fuel meeting the specification within BS EN 590. Where these standards are succeeded, they should be applied when reasonable. Exemptions to these standards may be granted for specialist equipment or for equipment with alternative emission reduction equipment or run on alternative fuels. Such exemptions shall be applied for in writing to the local planning authority in advance of the use of such vehicles, detailing the reasons for the exemption being sought and clearly identifying the subject vehicles. Exemptions that are granted will be in writing and such vehicles must not be used until written exemption has been issued by the local planning authority. No vehicles or plant to which the above emission standards apply shall be on site, at any time, whether in use or not, unless it complies with the above standards, without the prior written consent of the local planning authority. Reason: To protect the amenity of future occupants and/or neighbours.
  6. Approval of a Biodiversity Gain Plan will not be required before development commences Biodiversity Net Gain The effect of paragraph 13 of Schedule 7A to the Town and Country Planning Act 1990 is that planning permission granted for development of land in England is deemed to have been granted subject to the condition ('biodiversity gain condition') that development may not begin unless: (a) a Biodiversity Gain Plan has been submitted to the planning authority, and (b) the planning authority has approved the plan. The planning authority, for the purposes of determining whether to approve a Biodiversity Gain Plan, if one is required in respect of this permission would be the London Borough of Richmond upon Thames. There are statutory exemptions and transitional arrangements which mean that the biodiversity gain condition does not always apply. These are listed below. Based on the information available this permission is considered to be one which will not require the approval of a biodiversity gain plan before development is begun because one or more of the statutory exemptions or transitional arrangements in the list below is/are considered to apply. Statutory exemptions and transitional arrangements in respect of the biodiversity gain condition. 1. The application for planning permission was made before 12 February 2024. 2. The planning permission relates to development to which section 73A of the Town and Country Planning Act 1990 (planning permission for development already carried out) applies. 3. The planning permission was granted on an application made under section 73 of the Town and Country Planning Act 1990 and (i) the original planning permission to which the section 73 planning permission relates* was granted before 12 February 2024; or (ii) the application for the original planning permission* to which the section 73 planning permission relates was made before 12 February 2024. 4. The permission which has been granted is for development which is exempt being: 4.1 Development which is not 'major development' (within the meaning of article 2(1) of the Town and Country Planning (Development Management Procedure) (England) Order 2015) where: (i) the application for planning permission was made before 2 April 2024; (ii) planning permission is granted which has effect before 2 April 2024; or (iii) planning permission is granted on an application made under section 73 of the Town and Country Planning Act 1990 where the original permission to which the section 73 permission relates* was exempt by virtue of (i) or (ii). 4.2 Development below the de minimis threshold, meaning development which: (i) does not impact an onsite priority habitat (a habitat specified in a list published under section 41 of the Natural Environment and Rural Communities Act 2006); and (ii) impacts less than 25 square metres of onsite habitat that has biodiversity value greater than zero and less than 5 metres in length of onsite linear habitat (as defined in the statutory metric). 4.3 Development which is subject of a householder application within the meaning of article 2(1) of the Town and Country Planning (Development Management Procedure) (England) Order 2015. A 'householder application' means an application for planning permission for development for an existing dwellinghouse, or development within the curtilage of such a dwellinghouse for any purpose incidental to the enjoyment of the dwellinghouse which is not an application for change of use or an application to change the number of dwellings in a building. 4.4 Development of a biodiversity gain site, meaning development which is undertaken solely or mainly for the purpose of fulfilling, in whole or in part, the Biodiversity Gain Planning condition which applies in relation to another development, (no account is to be taken of any facility for the public to access or to use the site for educational or recreational purposes, if that access or use is permitted without the payment of a fee). 4.5 Self and Custom Build Development, meaning development which: (i) consists of no more than 9 dwellings; (ii) is carried out on a site which has an area no larger than 0.5 hectares; and (iii) consists exclusively of dwellings which are self-build or custom housebuilding (as defined in section 1(A1) of the Self-build and Custom Housebuilding Act 2015). 4.6 Development forming part of, or ancillary to, the high speed railway transport network (High Speed 2) comprising connections between all or any of the places or parts of the transport network specified in section 1(2) of the High Speed Rail (Preparation) Act 2013. * 'original planning permission means the permission to which the section 73 planning permission relates' means a planning permission which is the first in a sequence of two or more planning permissions, where the second and any subsequent planning permissions are section 73 planning permissions. Irreplaceable habitat If the onsite habitat includes irreplaceable habitat (within the meaning of the Biodiversity Gain Requirements (Irreplaceable Habitat) Regulations 2024) there are additional requirements for the content and approval of Biodiversity Gain Plans. The Biodiversity Gain Plan must include, in addition to information about steps taken or to be taken to minimise any adverse effect of the development on the habitat, information on arrangements for compensation for any impact the development has on the biodiversity of the irreplaceable habitat. The planning authority can only approve a Biodiversity Gain Plan if satisfied that the adverse effect of the development on the biodiversity of the irreplaceable habitat is minimised and appropriate arrangements have been made for the purpose of compensating for any impact which do not include the use of biodiversity credits. The effect of section 73D of the Town and Country Planning Act 1990 If planning permission is granted on an application made under section 73 of the Town and Country Planning Act 1990 (application to develop land without compliance with conditions previously attached) and a Biodiversity Gain Plan was approved in relation to the previous planning permission ('the earlier Biodiversity Gain Plan') there are circumstances when the earlier Biodiversity Gain Plan is regarded as approved for the purpose of discharging the biodiversity gain condition subject to which the section 73 planning permission is granted. Those circumstances are that the conditions subject to which the section 73 permission is granted: (i) do not affect the post-development value of the onsite habitat as specified in the earlier Biodiversity Gain Plan, and (ii) in the case of planning permission for a development where all or any part of the onsite habitat is irreplaceable habitat the conditions do not change the effect of the development on the biodiversity of that onsite habitat (including any arrangements made to compensate for any such effect) as specified in the earlier Biodiversity Gain Plan.
  7. The basement hereby approved shall not be constructed other than in accordance with recommendations made throughout the Basement Impact Assessment (dated 03 / 08 / 2026) and Flood Risk Assessment (ref. 29c_FRA_23.02.2026) unless otherwise approved in writing by the Local Planning Authority. The basement extension shall not be used for sleeping accommodation. REASON: To prevent the risk of flooding to and from the site in accordance with relevant policy requirements including but not limited to London Plan Policy SI13, its associated Sustainable Design and Construction SPG, and Richmond Council's Local Plan; to safeguard structural stability; and to reduce risk of life to future occupants.
  8. In accordance with Section DM3 of the National Planning Policy Framework, Richmond upon Thames Borough Council takes a positive and proactive approach to the delivery of sustainable development, by: * Providing a formal pre-application service * Providing written policies and guidance, all of which is available to view on the Council's website * Where appropriate, negotiating amendments to secure a positive decision * Determining applications in a timely manner. In this instance: * The application was amended following negotiations with the Council to ensure the scheme complied with adopted policy and guidance, and a decision was made without delay
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