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Planning application

17 Whittlesey Street London SE1 8SZ

Granted Lambeth 26/00346/FUL Full Planning Permission

Works: Extension

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Application for Full Planning Permission for the replacement of existing ground floor rear extension and replacement of existing garage roof with a green roof.

As published by the council, reference 26/00346/FUL

Application record

Reference
26/00346/FUL
Type
Full Planning Permission
Status
Decided
Decision
Granted As published: Grant Permission
Received
4 Feb 2026
Validated
4 Feb 2026
Decided
22 Apr 2026
Ward
Waterloo & South Bank
Decision by
Delegated Decision
Postcode
SE1 8SZ

Site history

Applications at this address on the Lambeth register

This site has had 4 applications since 2026: 4 approved, 0 refused.

  • 26/01824/LB Granted

    17 Whittlesey Street London SE1 8SZ

    Replacement of a first floor rear non-original bathroom window with ultra slim double glazing timber sash window, and installation of internal timber panelled window shutters. (Please note: The reference number for this Listed Building Consent application is 26/01824/LB but there is also an associated application for Full Planning Permission related to these works with reference number: 26/01823/FUL).

    Decided 14 Aug 2026 Heritage and listed buildings
  • 26/01823/FUL Granted

    17 Whittlesey Street London SE1 8SZ

    Replacement of a first floor rear non-original bathroom window with ultra slim double glazing timber sash window, and installation of internal timber panelled window shutters. (Full Planning Permission and Listed Building Consent ref:26/01824/LB applications received).

    Decided 14 Aug 2026 Full applications
  • 26/00347/LB Granted

    17 Whittlesey Street London SE1 8SZ

    Application for Listed Building Consent for the replacement of existing ground floor rear extension and replacement of existing garage roof with a green roof. External works: replacement of first floor WC windows with timber windows. Replacement of rainwater goods and cast irons vent with plastic together with repairs and making good of existing pointing. Replacement of existing ground floor rear door and windows with aluminium framed door and fixed windows. Internal works: Replacement and enlargement of existing basement with the installation of underground heating. Replacement of fireplaces and surround, removal of existing partition to first floor rear bedroom WC and installation of new cast iron radiators. (Full Planning Permission ref: 26/00346/FUL application received).

    Decided 22 Apr 2026 Heritage and listed buildings

Timeline

Dates from the published record

  1. 4 Feb 2026

    Received by Lambeth

  2. 22 Apr 2026

    Decision issued: Grant Permission

  3. 10 Aug 2026

    Added to PlanIndex

Cases linked to this one on the register

1 later application on the register refers to this one:

  • 26/00347/LB Granted

    17 Whittlesey Street London SE1 8SZ

    Application for Listed Building Consent for the replacement of existing ground floor rear extension and replacement of existing garage roof with a green roof. External works: replacement of first floor WC windows with timber windows. Replacement of rainwater goods and cast irons vent with plastic together with repairs and making good of existing pointing. Replacement of existing ground floor rear door and windows with aluminium framed door and fixed windows. Internal works: Replacement and enlargement of existing basement with the installation of underground heating. Replacement of fireplaces and surround, removal of existing partition to first floor rear bedroom WC and installation of new cast iron radiators. (Full Planning Permission ref: 26/00346/FUL application received).

    Decided 22 Apr 2026 Heritage and listed buildings

Who's behind it

Company information only, from the register and Companies House

Fynn Architects Agent, an architecture practice registered in London

Active · incorporated 2024 · London

6 applications on PlanIndex

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Greenwood Applicant, registered in Aberdeen

Dissolved · incorporated 1995 · Aberdeen

7 applications on PlanIndex · across 2 councils

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Documents

Plans, drawings, consultee responses and the officer's report

10 documents on file for this application

  • DELEGATED REGISTER Delegated Register · 22 Apr 2026
  • TREE SURVEY Supporting Docs · 04 Feb 2026
  • DRAFT CONSTRUCTION MANAGEMENT PLAN Supporting Docs · 04 Feb 2026
  • THE LOCATION PLAN Plans · 04 Feb 2026
  • DESIGN, ACCESS AND HERITAGE STATEMENT Supporting Docs · 04 Feb 2026
  • FLOOD RISK ASSESSMENT Supporting Docs · 04 Feb 2026
  • APPLICATION FORM - WITHOUT PERSONAL DATA Application Form · 04 Feb 2026
  • EXISTING AND PROPOSED PLANS Plans · 04 Feb 2026
  • DESK STUDY AND STAGE 1 & 2 BIA Supporting Docs · 04 Feb 2026
  • STAGE 1 & 2 BASEMENT IMPACT ASSESSMENT (SCREENING & SCOPING) REPORT Supporting Docs · 04 Feb 2026

Watch members (£5 a month) open the document list from here.

Open the documents

What this grant of permission means

Lambeth granted permission on 22 April 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

About full applications

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.

Nearby applications

Within 0.3 miles

  • 17 Whittlesey Street London SE1 8SZ

    26/00347/LB Submitted 4 Feb 2026 50 yards away

    Application for Listed Building Consent for the replacement of existing ground floor rear extension and replacement of existing garage roof with a green roof. External works: replacement of first floor WC windows with timber windows. Replacement of rainwater goods and cast irons vent with plastic together with repairs and making good of existing pointing. Replacement of existing ground floor rear door and windows with aluminium framed door and fixed windows. Internal works: Replacement and enlargement of existing basement with the installation of underground heating. Replacement of fireplaces and surround, removal of existing partition to first floor rear bedroom WC and installation of new cast iron radiators. (Full Planning Permission ref: 26/00346/FUL application received).

    Granted Heritage and listed buildings Extension Windows or glazing 11 docs
  • 1 - 3 Whittlesey Street London SE1 8SZ

    26/02951/FUL Submitted 9 Oct 2026 50 yards away

    78% historically approved · decision due ~4 Dec

    Proposed single-storey ground floor rear extension with bi-fold doors and double glazed glass, and alteration of garage door to front elevation with operable door, and internal reconfiguration of the ground floor.

    Awaiting decision Full applications Extension Windows or glazing
    Small domestic
  • 17 Whittlesey Street London SE1 8SZ

    26/01824/LB Submitted 22 Jun 2026 50 yards away

    Replacement of a first floor rear non-original bathroom window with ultra slim double glazing timber sash window, and installation of internal timber panelled window shutters. (Please note: The reference number for this Listed Building Consent application is 26/01824/LB but there is also an associated application for Full Planning Permission related to these works with reference number: 26/01823/FUL).

    Granted Heritage and listed buildings Windows or glazing 7 docs
  • 8 Whittlesey Street London SE1 8SZ

    26/02091/LB Submitted 17 Jul 2026 50 yards away

    79% historically approved · decision due ~11 Sep

    Erection of a single-storey ground-floor rear extension; partial removal of the rear infill wall and internal wall; removal and reconstruction of the existing single-storey pitched roof with installation of rooflights; alterations to doors and windows; and associated internal, external and drainage works to the Grade II listed building. (Please note: The reference number for this Listed Building Consent application is 26/02091/LB, but there is also an associated application for Full Planning Permission related to these works with reference number: 26/02090/FUL)

    Decided Heritage and listed buildings Extension Loft or dormer +1 8 docs
    Small domestic
  • 17 Whittlesey Street London SE1 8SZ

    26/01823/FUL Submitted 22 Jun 2026 50 yards away

    Replacement of a first floor rear non-original bathroom window with ultra slim double glazing timber sash window, and installation of internal timber panelled window shutters. (Full Planning Permission and Listed Building Consent ref:26/01824/LB applications received).

    Granted Full applications Windows or glazing 7 docs
  • 17 Whittlesey Street London Lambeth SE1 8SZ

    26/01786/FUL Submitted 18 Jun 2026 50 yards away

    78% historically approved · decision due ~13 Aug

    Partial rebuilding of existing garage, internal insulation, floor slab and roof replacement, replacement doors and windows (all proposed works are to the garage only).

    Decided Full applications Roofing Windows or glazing 6 docs

In Lambeth

  • 26/03040/FUL Awaiting decision

    3 Walberswick Street London Lambeth SW8 1XF

    Erection of a second-storey rear extension and the addition of a window to the mansard. Reduction from a double sliding door to a single door with a Juliet balcony

    Received 15 Oct, published by the council 21 Oct 2026 Full applications
  • 26/03004/FUL Awaiting decision

    61 Amesbury Avenue London Lambeth SW2 3AE

    Erection of a single storey rear infill extension, replacement of the existing timber sash windows with double glazed timber sash windows, erection of new fence to front patio and installaton of Air Source Heat Pump to existing roof.

    Received 14 Oct, published by the council 21 Oct 2026 Full applications
  • 26/02996/FUL Awaiting decision

    Surrey County Cricket Club Kennington Oval London Lambeth SE11 5SS

    Extension of the existing external balcony on third floor pitch-facing elevation and installation of minor additional plant at roof level.

    Received 13 Oct, published by the council 21 Oct 2026 Full applications
  • 26/03001/FUL Awaiting decision

    80 Park Hill London SW4 9PB

    Erection of a single-storey ground floor rear and infill extension including the installation of two rooflights (ground floor flat).

    Received 13 Oct, published by the council 19 Oct 2026 Full applications
  • 26/02962/FUL Awaiting decision

    280 Ground Floor Rosendale Road London Lambeth SE24 9DL

    installation of an extraction duct to side elevation (RETROSPECTIVE)

    Received 12 Oct, published by the council 13 Oct 2026 Full applications