17 Whittlesey Street London SE1 8SZ Data via plota.co.uk

26/01823/FUL - Full Planning Permission Approved
Extensions & alterationsListed buildings

Proposal

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). Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
22 Jun 2026
✓
Approved
14 Aug 2026

Approved on 14 Aug 2026 · Delegated Decision · Last checked 16 Aug 2026

Documents 9

Decision & officer reports 1

PDF Decision Notice Decision Notice · 14 Aug 2026 View ↗

Statements & assessments 2

PDF + HERITAGE STATEMENT Design & Access Statement · 22 Jun 2026 View ↗ PDF FLOOD RISK ASSESSMENT Supporting Docs · 22 Jun 2026 View ↗

Plans & drawings 2

PDF EXISTING/PROPOSED DRAWINGS Plans · 22 Jun 2026 View ↗ PDF THE LOCATION PLAN OS Map · 22 Jun 2026 View ↗

Application forms 2

PDF COMMUNITY INFRASTRUCTURE LEVY - COMPLETED FORM Supporting Docs · 22 Jun 2026 View ↗ PDF APPLICATION FORM - WITHOUT PERSONAL DATA Application Form · 22 Jun 2026 View ↗

Other documents 2

PDF Delegated Register Delegated Register · 13 Aug 2026 View ↗ PDF REVISED WINDOW DETAILS Plans - Revised · 11 Aug 2026 View ↗

All documents on the council site ↗

Associated applications 2

Site constraints 8

Grade II listed: 2-18, Whittlesey Street Se1
List entry 1081063 · 29 m from the pin · 21 more listed buildings within 150 m (21 Grade II)
Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Show the other 21 with distances
Historic England ↗
Flood zone 3, rivers and sea
High chance: a 1 in 100 or greater annual chance from rivers, or 1 in 200 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Flood map ↗
Roupell Street conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Air quality management area: Lambeth AQMA
The council has declared the area as failing an air quality objective.
Schemes that add traffic, parking or combustion plant are assessed against the area's action plan and may need an air quality assessment.
Council record ↗
Central activities zone
The core of central London in the London Plan.
Offices, culture and the other strategic functions of the centre take priority over new housing here.
Opportunity area
Where the London Plan expects significant growth.
Boundaries are indicative and the borough holds the detailed plan.
Also on the record
Inside the Lambeth built-up area; Town centre 84 m away: Waterloo.
Not affected
Not green belt · No scheduled monument at the site

Checked on 11 September 2026. Historic England, the Environment Agency, Natural England and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

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Other new applications on this street

17 Jul 2026Pending

8 Whittlesey Street London SE1 8SZ

Erection of a single-storey ground-floor rear extension; partial removal of the ...

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18 Jun 2026Approved

17 Whittlesey Street London Lambeth SE1 8SZ

Partial rebuilding of existing garage, internal insulation, floor slab and roof ...

26/01787/LB

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14 Aug 2026Pending

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Important details

Council
Lambeth
Application type
Full Planning Permission
Postcode
SE1 8SZ
Received
22 Jun 2026
Validated
22 Jun 2026
Ward
Waterloo & South Bank
Case officer
Show
Decision
Grant Permission
Decision date
14 Aug 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Fynn Architects

How this decision compares

Decided in 53 days from validation, about the council's usual 56 days. Approved, as 80% of extensions here are.

61%decided within 8 weeks
80%approved
569decided in the last year

Plota live figures for extensions decided by Lambeth in the last twelve months, from validation. Lambeth decision record →

Public comments

No public comments yet.

Last counted 16 Aug 2026

Read the comments on the council site ↗

Consultation & key dates

Env. assessment
No

Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2025 Refused
43 Roupell Street London SE1 8TB
Replacement of existing ground floor front and all first floor windows with single glazed…
25/03305/LB
2025 Approved
21 Roupell Street London SE1 8SP
Excavation of basement to lower the floor and increase head height, removal of walls and…
25/02028/LB
2025 Approved
21 Roupell Street London SE1 8SP
Excavation of basement to lower the floor and increase head height. Replacement of roof g…
25/02027/FUL
2025 Refused
43 Roupell Street London SE1 8TB
Replacement of existing ground floor front and all first floor windows with single glazed…
25/03495/FUL
2024 Approved
35 Roupell Street London Lambeth SE1 8TB
Replacement of existing rear/side extension with glazed mono-pitch roof; alteration of re…
24/03227/LB
2024 Approved
35 Roupell Street London Lambeth SE1 8TB
Replacement of existing rear/side extension with glazed mono-pitch roof; alteration of re…
24/03226/FUL
2025 Refused
32 Roupell Street London Lambeth SE1 8TB
Retrospective application for a conservation rooflight in butterfly roof (and associated…
25/02760/FUL
2025 Refused
32 Roupell Street London Lambeth SE1 8TB
Retrospective application for a conservation rooflight in butterfly roof (and associated…
25/02761/LB
2025 Approved
11B Theed Street London SE1 8ST
Rear garden. T1 Corkscrew Willow approx 7m. Crown reduce by up to 1.5m to previous points…
25/02926/TCA
2025 Approved
34 Roupell Street London SE1 8TB
Demolition of existing side and lean-to roof rear extensions. Erection of single storey g…
25/01647/LB
2025 Approved
34 Roupell Street London SE1 8TB
Demolition of existing side and lean-to roof rear extensions. Erection of single storey g…
25/01646/FUL
2025 Approved
13 Aquinas Street London SE1 8AE
Replacement of rear French doors and 2x rear windows with timber replacements.
25/00759/LB
2025 Approved
7 Miller Walk London SE1 8AJ
Rear Garden: T1: Birch: Crown reduce by up to 3m, back to previous points. Final height a…
25/01470/TCA
2025 Approved
22 & 22A Cornwall Road London SE1 8TW
Display of 2 non-illuminated A-Board signs to be placed on the pavement outside 22 Cornwa…
25/00656/ADV
2025 Refused
23 Cornwall Road London SE1 8TW
Application for Listed Building Consent for the replacement of all existing windows (like…
25/00845/LB
2024 Approved
55 Roupell Street London Lambeth SE1 8TB
Erection of single storey ground floor rear glazed enclosure; excavation of basement to l…
24/01716/LB
2024 Approved
55 Roupell Street London Lambeth SE1 8TB
Erection of single storey ground floor rear glazed enclosure; partial removal of side wal…
24/01715/FUL
2025 Approved
26 Roupell Street London SE1 8TB
Application for Listed Building Consent for the removal and replacement of plaster to int…
25/00193/LB
2024 Approved
13 Theed Street London Lambeth SE1 8ST
Removal of existing aluminium clad roofing and roof trusses, raising existing east and we…
24/03403/FUL
2024 Approved
23 Cornwall Road London SE1 8TW
Relocation of kitchen to basement with addition of glazed partition, replacement of stair…
24/03221/FUL
2016 Withdrawn
35 Cornwall Road London SE1 8TJ
Construction of a roof terrace at 2nd floor level with attendant doorway access and balus…
16/04884/FUL
2016 Approved
11 Miller Walk London SE1 8AJ
To crown reduce 1 x Silver Birch tree to front of property by up to 4.5 metres and prune…
16/04851/TCA
2016 Approved
Ground Floor 23 Cornwall Road London SE1 8TW
To crown reduce 8 x trees (T1, T2, T3, T4, T5, T7, T9 and T10) back to previous reduction…
16/01351/TCA
2016 Approved
52 Roupell Street London SE1 8TB
Refurbishment, including the formation of a rear lightwell (covered with a metal grating…
16/00356/FUL
2016 Approved
52 Roupell Street London SE1 8TB
Refurbishment including the formation of a rear lightwell (covered with metal grating at…
16/00357/LB
Lambeth
Planning Authority Score
2.7/10
Poor
#242 of 296 councils
Relevant to this application:
Householder decisions

Lambeth ranks #164 out of 296 councils for householder decision speed. 47% of applications have the time limit extended, above the 41% national average. Lambeth is also one of the strictest councils - it refuses more householder applications than almost any other, with only 81% approved vs 90% nationally.

One of the strictest councils
only 81% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Lambeth decision statistics
Based on MHCLG data, the year to March 2026
78%
Overall approval rate
Below avg (87%) #274 of 296
81%
Householder approved
Below avg (90%) #273 of 296
62%
Decided in 8 weeks
Below avg (63%) #164 of 296
47%
Extended time limit
Above avg (41%) #209 of 296
46%
Minor dwellings approved
70 decided (1-9 homes)
100%
Major dwellings approved
9 decided (10+ homes)
42%
Change of use approved
53 decided
1,784
Total decisions
396 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings