18 Horsmonden Road, London, SE4 1RG Data via plota.co.uk

DC/26/145071 - Householder Application Registered
Extensions & alterations

Proposal

Construction of single-storey rear extension and rear dormer extension at 18 Horsmonden Road, SE4. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
17 Aug 2026
✓
Validated
19 Aug 2026
✓
Consultation
25 Aug 2026
Decision
Expected by 14 Oct 2026

This application is under consideration - no decision has been issued yet. Plota predicts a decision around 14 Oct 2026, from Lewisham's recent extensions.

Documents 8

Plans & drawings 7

PDF 2601 p 101 Proposed floor plans Case Copy Drawings · 18 Aug 2026 View ↗ PDF 2601 p 102 Proposed elevations and section Case Copy Drawings · 18 Aug 2026 View ↗ PDF 2602 e 101 Existing plans Case Copy Drawings · 18 Aug 2026 View ↗ PDF 2602 e 102 Existing elevations and section Case Copy Drawings · 18 Aug 2026 View ↗ PDF 2602 e 103 Existing site photos Case Copy Drawings · 18 Aug 2026 View ↗ PDF 2601 p 103 Proposed elevation views Case Copy Drawings · 18 Aug 2026 View ↗ PDF Location plan Case Copy Drawings · 18 Aug 2026 View ↗

Application forms 1

PDF Redacted Application form Application Form · 18 Aug 2026 View ↗

All documents on the council site ↗

Site constraints 3

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 Named permitted development rights are withdrawn here.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: Crofton Park and Honor Oak Park Air Quality Management Area
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 ↗
Also on the record
Inside the Lewisham built-up area.
Not affected
Outside flood zones 2 and 3 · 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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Important details

Council
Lewisham
Application type
Householder Application
Postcode
SE4 1RG
Received
17 Aug 2026
Validated
19 Aug 2026
Ward
Crofton Park
Case officer
Show
Applicant
Show
Agent
Show

Decision outlook

Day 26 of the 56-day target. Lewisham usually decides extensions by day 56.

Day 2630 days to the 56-day target
81%decided within 8 weeks
86%approved
599decided 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 8 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15153878
Neighbours
25 Aug 2026
Consultation
25 Aug 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 Approved
53 CROFTON PARK ROAD, LONDON, SE4 1AF
Application for a Lawful Development Certificate (proposed) submitted under Section 192 o…
DC/25/142064
2025 Refused
53 CROFTON PARK ROAD, LONDON, SE4 1AF
Application for a Lawful Development Certificate (proposed) submitted under Section 192 o…
DC/25/141373
2025 Approved
47 SEVENOAKS ROAD, LONDON, SE4 1RF
Application for a Lawful Development Certificate (proposed) submitted under Section 192 o…
DC/25/139452
2025 Approved
46 CROFTON PARK ROAD, LONDON, SE4 1AE
Application for a Lawful Development Certificate (proposed) submitted under Section 192 o…
DC/25/138820
2025 Approved
46 CROFTON PARK ROAD, LONDON, SE4 1AE
The demolition of the conservatory and kitchen wall and the erection of a single storey r…
DC/25/138835
2024 Refused
46 CROFTON PARK ROAD, LONDON, SE4 1AE
The construction of a single-storey rear extension and rear roof extension, and installat…
DC/24/138174
2024 Approved
57 SEVENOAKS ROAD, LONDON, SE4 1RF
Application for a Lawful Development Certificate (proposed) submitted under Section 192 o…
DC/24/137186
2024 Approved
42 CROFTON PARK ROAD, LONDON, SE4 1AE
Removal of the existing conservatory and construction of a single storey rear extension a…
DC/24/135481
2024 Approved
41 CROFTON PARK ROAD, LONDON, SE4 1AF
Construction of a single storey rear extension and side infill extension at 41 Crofton Pa…
DC/24/135125
2023 Withdrawn
57 CROFTON PARK ROAD, LONDON, SE4 1AF
Application for a Lawful Development Certificate (proposed) submitted under Section 192 o…
DC/23/132411
2023 Approved
8 CROFTON PARK ROAD, LONDON, SE4 1AE
Construction of single-storey rear extension at 8 Crofton Park Road SE4.
DC/23/131881
2023 Refused
57 CROFTON PARK ROAD, LONDON, SE4 1AF
Application for a Lawful Development Certificate (proposed) submitted under Section 192 o…
DC/23/131600
2023 Approved
57 CROFTON PARK ROAD, LONDON, SE4 1AF
Construction of rear outbuilding, single storey rear infill extension, enlarged window op…
DC/23/130445
2022 Approved
40 CROFTON PARK ROAD, LONDON, SE4 1AE
Application for a Lawful Development Certificate (proposed) submitted under Section 192 o…
DC/22/129370
2022 Approved
34 CROFTON PARK ROAD, LONDON, SE4 1AE
Construction of dormer extension at the rear of the main roof and outrigger at 34 Crofton…
DC/22/128561
2022 Refused
88 CROFTON PARK ROAD, LONDON, SE4 1AE
Construction of a rear extension at 88 Crofton Park Road SE4.
DC/22/127803
2022 Approved
34 CROFTON PARK ROAD, LONDON, SE4 1AE
Part demolition of an existing ground floor rear extension and construction of a new sing…
DC/22/125568
2022 Approved
34 CROFTON PARK ROAD, LONDON, SE4 1AE
Lawful Development Certificate (Proposed) for the construction of roof extensions to the…
DC/22/125569
2021 Approved
61 CROFTON PARK ROAD, LONDON, SE4 1AF
Lawful Development Certificate (proposed) in respect of the constuction of a replacement…
DC/21/124087
2021 Approved
12 CROFTON PARK ROAD, LONDON, SE4 1AE
Lawful Development Certificate (Proposed) for the construction of extension to the rear r…
DC/21/123524
2016 Approved
48 CROFTON PARK ROAD, LONDON, SE4 1AE
The construction of a side and rear infill extension at 48 Crofton Park Road, SE4.
DC/16/099040
2016 Approved
32 LADYWELL HEIGHTS, CROFTON PARK ROAD, LONDON, SE4 1AE
The installation of replacement double glazed uPVC windows with brown coloured frames to…
DC/16/099543
2016 Approved
87 SEVENOAKS ROAD, LONDON, SE4 1RF
Lawful development certificate (proposed) in respect to a hip to gable roof extension tog…
DC/16/099371
2016 Approved
18 CROFTON PARK ROAD, LONDON, SE4 1AE
The construction of a single storey wrap-around extension with a pitched roof and folding…
DC/16/098971
2016 Approved
30 CROFTON PARK ROAD, LONDON, SE4 1AE
Construction of a single storey rear extension at 30 Crofton Park Road, SE4
DC/16/095135
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