Planning application
17 Whittlesey Street London SE1 8SZ
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).
-
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).
-
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).
Timeline
Dates from the published record
-
4 Feb 2026
Received by Lambeth
-
22 Apr 2026
Decision issued: Grant Permission
-
10 Aug 2026
Added to PlanIndex
Related applications
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).
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 recordGreenwood 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 recordDocuments
Plans, drawings, consultee responses and the officer's report
10 documents on file for this application
- DELEGATED REGISTER
- TREE SURVEY
- DRAFT CONSTRUCTION MANAGEMENT PLAN
- THE LOCATION PLAN
- DESIGN, ACCESS AND HERITAGE STATEMENT
- FLOOD RISK ASSESSMENT
- APPLICATION FORM - WITHOUT PERSONAL DATA
- EXISTING AND PROPOSED PLANS
- DESK STUDY AND STAGE 1 & 2 BIA
- STAGE 1 & 2 BASEMENT IMPACT ASSESSMENT (SCREENING & SCOPING) REPORT
Watch members (£5 a month) open the document list from here.
Open the documentsWhat 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
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
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 glazingSmall domestic -
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).
Granted Heritage and listed buildings Windows or glazing 7 docs -
8 Whittlesey Street London SE1 8SZ
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 docsSmall domestic -
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).
Granted Full applications Windows or glazing 7 docs -
17 Whittlesey Street London Lambeth SE1 8SZ
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
Other full applications
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
-
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.
-
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.
-
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).
-
26/02962/FUL Awaiting decision
280 Ground Floor Rosendale Road London Lambeth SE24 9DL
installation of an extraction duct to side elevation (RETROSPECTIVE)