37 Rowsley Avenue London NW4 1AP Data via plota.co.uk

25/4837/HSE - Householder Application Approved
Extensions & alterations

Proposal

Single storey side extension and rear extensions with 3no. rooflights following demolition of the existing conservatory. Repositioning of existing air conditioning unit to side elevation [Amended Description] Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
3 Dec 2025
✓
Consultation
11 Dec 2025
✓
Approved
29 Jan 2026

Approved on 29 Jan 2026 · Delegated Decision · Last checked 3 Oct 2026

Documents 9

Decision & officer reports 2

PDF DELEGATED REPORT Report · 5 Feb 2026 View ↗ PDF DN: APPROVE HSE WITH CONDS Decision Notice · 29 Jan 2026 View ↗

Statements & assessments 3

PDF FLOOD RISK ASSESSMENT Application Document · 3 Dec 2025 View ↗ IMG FLOOD RISK ASSESSMENT Application Document · 3 Dec 2025 View ↗ PDF FLOOD RISK ASSESSMENT Application Document · 3 Dec 2025 View ↗

Plans & drawings 2

PDF PROPOSED PLAN SET Revised Drawing · 23 Jan 2026 View ↗ PDF EXISTING Drawing · 3 Dec 2025 View ↗

Application forms 2

PDF APPLICATION FORM - WITHOUT PERSONAL DATA Application Form · 3 Dec 2025 View ↗ PDF COMMUNITY INFRASTRUCTURE LEVY - COMPLETED FORM CIL Document · 3 Dec 2025 View ↗

All documents on the council site ↗

Site constraints 4

Article 4 direction
Article 4 Small Houses in Multiple Occupation (HMO) Area 1. Named permitted development rights are withdrawn here.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: Barnet 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 ↗
Also on the record
Inside the Barnet built-up area; Public transport access: PTAL 0 (very poor), TfL 2023, for the 100 m square.
Not affected
Outside flood zones 2 and 3 · Not green belt · No listed building at the site

Checked on 2 November 2026. Historic England, the Environment Agency, Natural England, 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.

Sales history 2

Last sold for £590,000 in March 2008. Semi-detached house, freehold.

4 March 2008£590,000
18 May 2000£298,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

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Other new applications on this street

3 Nov 2026Pending

38 Rowsley Avenue London NW4 1AJ

Roof extension involving hip to gable, rear dormer window with juliette balcony ...

26/3985/192

Nearby new applications

3 Nov 2026Pending

38 Rowsley Avenue London NW4 1AJ

Roof extension involving hip to gable, rear dormer window with juliette balcony ...

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22 Sept 2026Approved

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1 x Ash (applicants ref. T1) - Fell to ground level. Dead Elm Group (applicants ...

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17 Sept 2026Pending

11 Downage London NW4 1AS

Alterations and extensions to the roof including rear dormer window and the part...

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New first floor roof terrace to rear elevation with associated balustrade and pr...

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Important details

Council
Barnet
Application type
Householder Application
Postcode
NW4 1AP
Received
3 Dec 2025
Validated
3 Dec 2025
Ward
Hendon
Case officer
Show
Target decision
3 Feb 2026
Decision
Approve subject to conditions
Decision date
29 Jan 2026
Decision level
Delegated Decision
Applicant
Show
Agent
S & S Coates Surveying & Design

How this decision compares

Decided in 57 days from validation, 5 days slower than Barnet's median of 52 for extensions. Approved, as 75% of extensions here are.

86%decided within 8 weeks
75%approved
2,145decided in the last year

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

Public comments

No public comments yet.

Last counted 3 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14536749
Planning Portal ref
PP-14536749
Comments by
1 Jan 2026
Site or press notice
11 Dec 2025
Statutory expiry
28 Jan 2026

Historical activity at this location

27 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2024 Approved
Single storey side and rear extension following demolition of the existing conservatory a…
24/3517/HSE
2024 Approved
Roof extension involving hip to gable rear dormer with juliette balcony, 2no. front facin…
24/3514/192
Within ~100m

Nearby activity

2025 Approved
Ground Floor Flat 20 Rowsley Avenue London NW4 1AJ
Single storey rear extension with 2no. rooflights
25/1286/FUL
2023 Refused
38 Rowsley Avenue London NW4 1AJ
Roof extension including hip to gable, rear dormer window with juliette balcony and 2no…
23/2725/192
2023 Approved
44 Rowsley Avenue London NW4 1AJ
Single storey front porch extension over the existing garage with pitched roof following…
23/2429/HSE
2023 Approved
48 Rowsley Avenue London NW4 1AJ
Part single, part two storey side and rear extension and extension of existing raised pat…
23/1665/HSE
2023 Approved
44 Rowsley Avenue London NW4 1AJ
Roof extension including hip to gable, rear dormer window, 2no. front facing rooflights a…
23/1874/192
2023 Approved
13 Rowsley Avenue London NW4 1AP
Single storey front extension including conversion of the existing garage into habitable…
23/1148/HSE
2022 Refused
38 Rowsley Avenue London NW4 1AJ
First floor side extension. Roof extension involving rear dormer window with juliette bal…
22/2979/HSE
2022 Refused
13 Rowsley Avenue London NW4 1AP
Single storey rear extension measuring 6m in depth with a maximum height of 3m and eaves…
22/5876/PNH
2022 Approved
46 Rowsley Avenue London NW4 1AJ
Single storey side extension following demolition of the existing extension and shed
22/5199/192
2022 Approved
86 Sunny Gardens Road London NW4 1RY
Single storey rear conservatory extension
22/3582/HSE
2021 Refused
32 Rowsley Avenue London NW4 1AJ
Proposed merging of the single storey rear extension with crown roof and rear patio. Erec…
21/1049/HSE
2021 Refused
32 Rowsley Avenue London NW4 1AJ
Proposed merging of the single storey rear extension with crown roof and rear patio. Erec…
21/1431/HSE
2021 Approved
100 Sunny Gardens Road London NW4 1RY
Roof extension including hip to gable, rear dormer window with juliette balcony, 1no. roo…
21/4348/192
2021 Approved
100 Sunny Gardens Road London NW4 1RY
Roof extension involving hip to gable, rear dormer window with juliette balcony, 2no fron…
21/2654/192
2020 Approved
32 Rowsley Avenue London NW4 1AJ
Single storey rear infill extensions between existing ground floor extensions. Erection o…
20/5924/HSE
2020 Approved
100 Sunny Gardens Road London NW4 1RY
Single storey side/rear extension. Alterations to existing rear extension.
20/4925/HSE
2020 Approved
94 Sunny Gardens Road London NW4 1RY
Single storey front, side and rear extension following the demolition of the existing ext…
20/4422/HSE
2020 Refused
32 Rowsley Avenue London NW4 1AJ
Amalgamation of the ground floor rear extension with crown roof. Erection of ground floor…
20/2488/HSE
2020 Approved
22 Rowsley Avenue London NW4 1AJ
Single storey rear extension with raised patio area and associated access steps
20/4022/HSE
2020 Refused
22 Rowsley Avenue London NW4 1AJ
Single storey rear extension (AMENDED DESCRIPTION)
20/2648/HSE
2017 Approved
27 Downage London NW4 1AS
Roof extension involving 2no rear dormer windows and 1no side dormer window, 2no roofligh…
17/3737/HSE
2016 Approved
43 Rowsley Avenue London NW4 1AP
Single storey rear extension following demolition of existing conservatory. Alterations t…
16/4790/HSE
2016 Approved
43 Rowsley Avenue London NW4 1AP
Extension to roof including rear wrap-around dormer with juliette balcony to facilitate a…
16/4774/192
2016 Approved
10 Rowsley Avenue London NW4 1AJ
Ground floor rear extensions. New steps to garden and associated works
16/3105/FUL
2016 Refused
90 Sunny Gardens Road London NW4 1RY
Single storey rear extension with raised terrace following the demolition of the existing…
16/0460/HSE
Barnet
Planning Authority Score
6.2/10
Average
#90 of 296 councils
Relevant to this application:
Householder decisions

Barnet is faster than most councils at deciding householder applications, ranking #42 out of 296. Only 25% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Barnet is also one of the strictest councils - it refuses more householder applications than almost any other, with only 82% approved vs 90% nationally.

One of the strictest councils
only 82% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Barnet decision statistics
Based on MHCLG data, the year to March 2026
75%
Overall approval rate
Below avg (87%) #285 of 296
82%
Householder approved
Below avg (90%) #264 of 296
79%
Decided in 8 weeks
Above avg (63%) #42 of 296
25%
Extended time limit
Below avg (41%) #29 of 296
55%
Minor dwellings approved
319 decided (1-9 homes)
90%
Major dwellings approved
21 decided (10+ homes)
41%
Change of use approved
132 decided
2,541
Total decisions
625 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use