22 - 24 Thurlestone Avenue London N12 0LP Data via plota.co.uk

26/3453/FUL - Full Application Pending Consideration
Commercial & major worksDemolitionExtensions & alterationsCommercial premises

Proposal

Single storey extension to the existing rear (Class E) office outbuilding following demolition of existing annexe outbuilding Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
22 Sept 2026
✓
Consultation
1 Oct 2026
Decision
Expected by 17 Nov 2026

This application is under consideration - no decision has been issued yet. Plota predicts a decision around 17 Nov 2026, from Barnet's recent commercial and major works. Comments are open until 22 Oct 2026.

Comment on this application ↗

Documents 9

Statements & assessments 2

PDF PLANNING STATEMENT Planning statement · 22 Sept 2026 View ↗ PDF FIRE STATEMENT Application Document · 22 Sept 2026 View ↗

Plans & drawings 5

PDF SITE LOCATION AND SITE PLANS Site Location Plan · 25 Sept 2026 View ↗ PDF EXISTING AND PROPOSED BLOCK PLANS Block plan · 25 Sept 2026 View ↗ PDF THE LOCATION PLAN Site Location Plan · 22 Sept 2026 View ↗ PDF PROPOSED DRAWINGS Drawing · 22 Sept 2026 View ↗ PDF EXISTING DRAWINGS Drawing · 22 Sept 2026 View ↗

Application forms 2

PDF APPLICATION FORM - WITHOUT PERSONAL DATA Application Form · 22 Sept 2026 View ↗ PDF COMMUNITY INFRASTRUCTURE LEVY - COMPLETED FORM CIL Document · 22 Sept 2026 View ↗

All documents on the council site ↗

Site constraints 5

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 Named permitted development rights are withdrawn here.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 ↗
Local nature reserve 104 m away: Coppetts Wood and Glebelands
Work nearby can need a habitats assessment.
Harm to a protected site is only accepted where there is no alternative and an overriding public interest.
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Also on the record
Inside the Barnet built-up area.
Not affected
Outside flood zones 2 and 3 · Not green belt · No listed building at the site

Checked on 23 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
Barnet
Application type
Full Application
Postcode
N12 0LP
Received
22 Sept 2026
Validated
22 Sept 2026
Ward
Friern Barnet
Case officer
Show
Target decision
17 Nov 2026
Applicant
Show
Agent
Excel Planning

Decision outlook

Day 12 of the 56-day target. Barnet usually decides commercial and major works by day 56.

Day 1244 days to the 56-day target
72%decided within 8 weeks
58%approved
38decided in the last year

Plota live figures for commercial and major works decided by Barnet in the last twelve months, from validation. Barnet decision record →

Public comments

No public comments yet.

Last counted 1 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15241908
Comments by
22 Oct 2026
Site or press notice
1 Oct 2026
Statutory expiry
17 Nov 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

2025 Approved
Roof extension including 1no. rear dormer window, 1no side dormer window and 2no. front f…
25/2288/FUL
2025
Single storey rear extension to the existing office following demolition of the existing…
25/0877/FUL
Within ~100m

Nearby activity

2024 Approved
36 Thurlestone Avenue London N12 0LP
Single storey rear extension with a depth of 3.52m, a maximum height of 3.79m and an eave…
24/4810/PNH
2024 Withdrawn
40 Thurlestone Avenue London N12 0LP
Erection of a rear outbuilding
24/3591/192
2024 Approved
36 Thurlestone Avenue London N12 0LP
Roof extension involving hip to gable, rear dormer window, 2no. front facing rooflights a…
24/3502/192
2024 Approved
40 Thurlestone Avenue London N12 0LP
Single storey rear extension with 2 no rooflights following the demolition of the existin…
24/2335/HSE
2024 Approved
40 Thurlestone Avenue London N12 0LP
Roof extension involving hip to gable, rear dormer window with juliette balcony and 3no…
24/2336/192
2023 Approved
23 Ferncroft Avenue London N12 0LN
Roof extension including hip to gable, rear dormer window with juliette balcony and 3no…
23/2844/192
2023 Approved
23 Ferncroft Avenue London N12 0LN
Single storey rear extension with a proposed depth of 5.50 metres from original rear wall…
23/2843/PNH
2022 Approved
12 Thurlestone Avenue London N12 0LP
Single storey rear extension following demolition of the existing garage. New timber fenc…
22/5813/HSE
2022 Approved
26 Lyndhurst Avenue London N12 0LU
Roof extension involving hip to gable, rear dormer and 2no front facing rooflights
22/3332/192
2022 Approved
20 Lyndhurst Avenue London N12 0LU
Roof extension involving hip to gable, rear dormer window and 2no. front facing rooflights
22/2368/192
2022
20 Lyndhurst Avenue London N12 0LU
Single storey rear infill extension. Demolition and rebuild of the existing garage into h…
22/2367/HSE
2021 Approved
7 Ferncroft Avenue London N12 0LN
Part single, part two storey rear extension following demolition of the existing garage…
21/3549/HSE
2021 Approved
7 Ferncroft Avenue London N12 0LN
Part single, part two storey rear extension following demolition of the existing garage…
21/3549/FUL
2021 Approved
8 Thurlestone Avenue London N12 0LP
Single storey rear extension
21/3776/HSE
2021 Approved
7 Ferncroft Avenue London N12 0LN
Roof extension involving hip to gable, rear dormer window and 3no front facing rooflights
21/3560/192
2021 Refused
8 Thurlestone Avenue London N12 0LP
Single storey rear extension
21/2583/192
2020 Approved
8 Ferncroft Avenue London N12 0LN
Single storey rear extension
20/5894/HSE
2021 Approved
16 Lyndhurst Avenue London N12 0LU
Single storey side and rear extension. Bay window to front elevation. (AMENDED PROPOSAL)
21/0890/HSE
2021 Approved
5 Ferncroft Avenue London N12 0LN
Erection of a rear outbuilding following demolition of existing detached garage
21/0642/192
2021 Approved
5 Ferncroft Avenue London N12 0LN
Roof extension involving hip to gable, rear dormer window and 3no front facing rooflights
21/0641/192
2017 Approved
33 Hollickwood Avenue London N12 0LS
Single storey rear extension following demolition of existing garage and the construction…
17/5238/HSE
2017 Refused
5 Thurlestone Avenue London N12 0LP
Single storey rear extension. Relocation of existing step and insertion of railing
17/5735/192
2017 Approved
21 Ferncroft Avenue Friern Barnet London N12 0LN
Extension to roof including hip to gable end, 1no rear dormer and 1no additional roof lig…
17/1716/192
2017 Approved
25 Thurlestone Avenue London N12 0LP
Extension to roof including hip to gable end, 1no rear dormer with 3no roof lights to fro…
17/0297/192
2016 Approved
18 Lyndhurst Avenue London N12 0LU
Single storey rear and side extension
16/5579/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