20 Undercliff Road, London, SE13 7TT Data via plota.co.uk

DC/26/145770 - Full Planning Permission Registered
Extensions & alterations

Proposal

Installation of replacement uPVC double-glazed windows on the front, rear and side elevations. Installation of two replacement composite doors on the front elevation, and replacement uPVC doors on the rear and side elevations at 20 Undercliff Road, SE13. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
14 Oct 2026
✓
Consultation
20 Oct 2026
Decision
Expected by 9 Dec 2026

Under consideration

No decision has been issued yet. Plota predicts a decision around 9 Dec 2026, from Lewisham's recent extensions.

Documents 7

Statements & assessments 1

PDF Design and access statement Case Copy Documents · 14 Oct 2026 View ↗

Plans & drawings 5

PDF 12440-pr-20ur-zz-dr-a-pl402 Proposed window and door schedules Case Copy Drawings · 14 Oct 2026 View ↗ PDF 12440-pr-20ur-zz-dr-a-pl401 Proposed window and door schedules Case Copy Drawings · 14 Oct 2026 View ↗ PDF 12440-pr-20ur-zz-dr-a-pl201 Existing & proposed elevations Case Copy Drawings · 14 Oct 2026 View ↗ PDF 28mm upvc suppliers casement Case Copy Drawings · 14 Oct 2026 View ↗ PDF Location plan Case Copy Drawings · 14 Oct 2026 View ↗

Application forms 1

PDF Redacted Application form Application Form · 14 Oct 2026 View ↗

All documents on the council site ↗

Site constraints 8

Article 4 direction
Small HMO Northern Extension. Named permitted development rights are withdrawn here.
An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.
Air quality management area: Lewisham 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 ↗
National infrastructure project about 873 m away: Thames Tideway Tunnel
The site is about 873 m from the project boundary. Waste water treatment, decided. The project page says whether consent was granted. Also within 2 km: London Strategic Heat Main Project (at pre-application, about 1619 m).
Nationally significant infrastructure projects (power stations, electricity lines, pipelines, major roads and railways, harbours, airports and reservoirs) are consented by a Secretary of State under the Planning Act 2008, after an examination by the Planning Inspectorate, rather than by the council. The boundary is the one the Inspectorate consults on and can change as the scheme does. Projects are shown within 2 km of the site.
Planning Inspectorate project page ↗
Also on the record
Local nature reserve about 320 m away: Brookmill Road; Radon affected area, class 2; Inside the Lewisham built-up area; Public transport access: PTAL 5 (very good), TfL 2023, for the 100 m square; Conservation area about 94 m away: Brockley.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 20 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI), Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) 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

22 Jun 2026Approved

28 UNDERCLIFF ROAD, LONDON, SE13 7TT

Installation of replacement windows and doors to the front and rear elevations t...

DC/26/144440
14 Sept 2026Pending

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DC/26/145377
12 Aug 2026Approved

7 UNDERCLIFF ROAD, LONDON, SE13 7TU

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DC/26/145021
5 Aug 2026Approved

19 UNDERCLIFF ROAD, LONDON, SE13 7TU

Application for a Lawful Development Certificate (proposed) submitted under Sect...

DC/26/144964

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22 Oct 2026Pending

92 TYRWHITT ROAD, LONDON, SE4 1QB

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21 Oct 2026Pending

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Demolition of the existing MOT garage (B2) and change of use and construction of...

DC/26/145693
14 Oct 2026Pending

12 DARLING ROAD, LONDON, SE4 1YQ

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12 Oct 2026Pending

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9 Oct 2026Pending

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Important details

Council
Lewisham
Application type
Full Planning Permission
Postcode
SE13 7TT
Received
14 Oct 2026
Validated
14 Oct 2026
Ward
Ladywell
Case officer
Show
Target decision
9 Dec 2026
Decision level
Delegated
Applicant
Show
Agent
Potter Raper
Freehold owner
Show

Decision outlook

Day 14 of the 56-day target. Lewisham usually decides extensions by day 56.

Day 1442 days to the 56-day target
76%decided within 8 weeks
86%approved
782decided in the last year

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

Public comments

No public comments yet.

Last counted 26 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15123709
Planning Portal ref
PP-15123709
Neighbours
20 Oct 2026
Consultation
20 Oct 2026
Statutory expiry
9 Dec 2026
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
1 SANDROCK ROAD, LONDON, SE13 7TS
Conversion of the property from a small scale house in multiple occupation (Use Class C4)…
DC/26/142551
2025 Withdrawn
1 SANDROCK ROAD, LONDON, SE13 7TS
The construction of a roof extension to the rear roofslope and installation of rooflights…
DC/25/141547
2025 Refused
22 SANDROCK ROAD, LONDON, SE13 7TR
Application for a Lawful Development Certificate (proposed) submitted under Section 192 o…
DC/25/141330
2024 Approved
26A SANDROCK ROAD, LONDON, SE13 7TR
Installation of replacement windows in the front and rear elevations at Flats A & B 26 Sa…
DC/24/136001
2024 Approved
52B SANDROCK ROAD, LONDON, SE13 7TR
Construction of a roof extension to the rear roofslope at 52B Sandrock Road, SE13.
DC/24/135077
2024 Withdrawn
52B SANDROCK ROAD, LONDON, SE13 7TR
Retrospective application for the removal of a window in the rear facade, lowering of the…
DC/24/135076
2023 Approved
30 SHELL ROAD, LONDON, SE13 7TW
Construction of a two storey rear extension and alterations to the existing raised terrac…
DC/23/133277
2023 Approved
16 UNDERCLIFF ROAD, LONDON, SE13 7TT
Installation of solar panels to the front roof slope and the rear roof extension, install…
DC/23/133293
2023 Approved
30 SHELL ROAD, LONDON, SE13 7TW
Construction of a dormer extension to the rear roof slope at 30 Shell Road, SE13.
DC/23/133270
2023 Approved
37A SANDROCK ROAD, LONDON, SE13 7TS
Construction of an outbuilding in the rear garden at 37A Sandrock Road SE13.
DC/23/131440
2023 Approved
45 SANDROCK ROAD, LONDON, SE13 7TS
Construction of a rear dormer, installation of two front rooflights and the alteration of…
DC/23/130659
2023 Approved
18A & 18B SANDROCK ROAD, LONDON, SE13 7TR
The installation of replacement uPVC windows in the front, side and rear elevations and u…
DC/23/130284
2022 Approved
33A SANDROCK ROAD, LONDON, SE13 7TS
Construction of an outbuilding in the rear garden of 33A Sandrock Road SE13.
DC/22/128396
2022 Refused
2 UNDERCLIFF ROAD, LONDON, SE13 7TT
Removal of the existing parapets and high level chimney stacks to the roofs of Loampit Go…
22/127819
2022 Refused
2 UNDERCLIFF ROAD, LONDON, SE13 7TT
Removal of the existing parapets and high level chimney stacks to the roofs of Loampit Go…
DC/22/127819
2022 Approved
16 SHELL ROAD, LONDON, SE13 7TW
Construction of a single storey rear extension at 16 Shell Road, SE13.
DC/22/126709
2022 Approved
7A SHELL ROAD, LONDON, SE13 7TW
Construction of a single storey rear extension to ground floor flat at 7a Shell Road, SE1…
DC/22/126101
2022 Approved
36 UNDERCLIFF ROAD, LONDON, SE13 7TT
The construction of single storey rear extension at 36 Undercliff Road SE13.
DC/22/126564
2022 Approved
38 SHELL ROAD, LONDON, SE13 7TW
The erection of a two storey rear extension at 38 Shell Road, SE12, together with the con…
DC/22/126310
2022 Approved
36 UNDERCLIFF ROAD, LONDON, SE13 7TT
Lawful Development Certificate (Proposed Use) for construction of rear roof extension and…
DC/22/126180
2016 Approved
33B SANDROCK ROAD, LONDON, SE13 7TS
The construction of a roof extension to the rear roof slope at 33B Sandrock Road SE13, to…
DC/16/097090
2016 Approved
GROUND FLOOR FLAT, 4 UNDERCLIFF ROAD, LONDON, SE13 7TT
The construction of a single storey rear extension to the ground floor flat at 4 Undercli…
DC/16/096559
2016 Approved
16 SANDROCK ROAD, LONDON, SE13 7TR
Lawful Development Certificate (Proposed) in respect of the construction of a single stor…
DC/16/096428
2016 Approved
62 SANDROCK ROAD, LONDON, SE13 7TR
Lawful Development Certificate (Proposed) in respect of the construction of a rear roof e…
DC/16/096708
2016 Refused
62 SANDROCK ROAD, LONDON, SE13 7TR
Lawful Development Certificate (Proposed) in respect of the construction of a rear roof e…
DC/16/095837
Lewisham
Planning Authority Score
5.8/10
Average
#111 of 296 councils
Relevant to this application:
Householder decisions

Lewisham ranks #127 out of 296 councils for householder decision speed. Householder applications are slightly more likely to be approved here (90%) than the national average (90%).

These figures are council-wide context, not a prediction for this application. View full council performance
Lewisham decision statistics
Based on MHCLG data, the year to March 2026
84%
Overall approval rate
Below avg (87%) #224 of 296
90%
Householder approved
Above avg (90%) #192 of 296
69%
Decided in 8 weeks
Above avg (63%) #127 of 296
31%
Extended time limit
Below avg (41%) #58 of 296
65%
Minor dwellings approved
117 decided (1-9 homes)
92%
Major dwellings approved
12 decided (10+ homes)
57%
Change of use approved
67 decided
1,303
Total decisions
207 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Freehold owner: Information produced by HM Land Registry. © Crown copyright 2026. Source: HM Land Registry, UK and overseas companies that own property in England and Wales, September 2026 release.