143 Colindale Avenue London NW9 5HB Data via plota.co.uk

26/3647/PNH - Prior Notification (Householder) Pending Consideration
Extensions & alterations

Proposal

Single storey rear/side extension with a proposed depth of 6 metres, maximum height of 2.9 metres and eaves height of 2.85 metres; Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
8 Oct 2026
✓
Consultation
9 Oct 2026
Decision
Expected by 19 Nov 2026

Under consideration

No decision has been issued yet. Plota predicts a decision between 20 Nov 2026 and 2 Dec 2026, from Barnet's recent extensions.

Comments are open until 1 Nov 2026

Comment on this application ↗

Documents 6

Statements & assessments 1

PDF FLOOD RISK ASSESSMENT Application Document · 8 Oct 2026 View ↗

Plans & drawings 4

PDF THE LOCATION PLAN Site Location Plan · 8 Oct 2026 View ↗ PDF BLOCK PLAN OF THE SITE Block plan · 8 Oct 2026 View ↗ PDF LAYOUT PLAN - EXISTING Drawing · 8 Oct 2026 View ↗ PDF LAYOUT PLAN - PROPOSED Drawing · 8 Oct 2026 View ↗

Application forms 1

PDF APPLICATION FORM - WITHOUT PERSONAL DATA Application Form · 8 Oct 2026 View ↗

All documents on the council site ↗

Site constraints 7

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 Named permitted development rights are withdrawn here.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 ↗
Opportunity area
Where the London Plan expects significant growth.
Boundaries are indicative and the borough holds the detailed plan.
Also on the record
1 listed building within 150 m; Tree preservation order 8 m away: The London Borough of Barnet Colindale Hospital and adjacent, Colindale Avenue, London NW9 Tree Preservation Order 2004 made under The Town and Country Planning Act 1990 The Town and Country Planning; Inside the Barnet built-up area; Public transport access: PTAL 4 (good), TfL 2023, for the 100 m square.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 16 October 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.

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Other new applications on this street

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Important details

Council
Barnet
Application type
Prior Notification (Householder)
Postcode
NW9 5HB
Received
8 Oct 2026
Validated
8 Oct 2026
Ward
Colindale South
Case officer
Show
Target decision
19 Nov 2026
Applicant
Show
Agent
AGS

Decision outlook

Day 20 of the 56-day target. Barnet usually decides extensions by day 52.

Day 2036 days to the 56-day target
87%decided within 8 weeks
75%approved
1,888decided 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.

26 neighbours consulted · Last counted 22 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15277195
Planning Portal ref
PP-15277195
Neighbours
9 Oct 2026
Consultation
9 Oct 2026
Comments by
1 Nov 2026
Statutory expiry
19 Nov 2026

Historical activity at this location

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

This property

Previous applications at this address

2025
Erection of a rear outbuilding
25/4749/192
2025 Refused
Erection of a garden outhouse
25/3362/192
2025 Approved
Roof extension involving rear dormer window and 2no. front facing rooflights
25/3364/192
2025 Refused
Single storey rear extension with a depth of 6.00 metres, a maximum height of 2.90 metres…
25/3363/PNH
2024
Erection of a garden room
24/4062/192
Within ~100m

Nearby activity

2025 Approved
Land To The North Of Substation Joslin Avenue London NW9 5HW
1 x Lombardy Poplar (applicants ref. T38) - Monolith to height of 3m. Standing in Area A1…
TPP/0774/25
2024
145 Colindale Avenue London NW9 5HB
Erection of a garden room
24/4063/192
2021 Refused
Fletcher Court 1 Joslin Avenue London NW9 5HW
Upward extension to create 44 additional dwellinghouses with associated cycle store and e…
21/6753/PNV
2021 Refused
118 Colindale Avenue London NW9 5GX
Change of use from a Tuition Centre Business (Class F1a) to a Cafe (Class Eb)
21/4472/FUL
2021 Withdrawn
118 Colindale Avenue London NW9 5GX
Change of use from a Tuition Centre Business to a Cafe
21/2331/192
2020 Approved
65A Colindale Avenue London NW9 5HB
Roof extension involving rear dormer windows
20/5057/FUL
2020 Approved
63A Colindale Avenue London NW9 5HB
Roof extension involving rear dormer window
20/5056/FUL
2020 Approved
A5150 Colindeep Lane- From The Junction With Edgeware Road To The West And Near Watford Way To The East
Installation of up to 11no PVC lamp post banners (amended description)
20/3057/ADV
2020 Approved
Colindale Avenue - From The Junction With Edgware Road To The West And Aerodrome Road To The East
Installation of up to 27no PVC lamppost banners
20/3060/ADV
2020 Approved
Ground And First Floor Unit 3 Colindale Business Centre 126 Colindale Avenue London NW9 5HD
Change of use of the ground and first floors of Unit 3 of the property from B1(a) (office…
20/4916/PNO
2018 Approved
Unit 2 126 Colindale Avenue London NW9 5HD
Change of use from Use Class B1 (office) to Use Class C3 (residential) to provide (14 Uni…
18/2026/PNO
2018 Refused
Unit 2 126 Colindale Avenue London NW9 5HD
Change of use from Use Class B1 (office) to Use Class C3 (residential) to provide (14 Uni…
18/0933/PNO
2017 Approved
126 - 128 Colindale Avenue London NW9 5HD
Installation of 2no internally illuminated fascia signs and 1no internally illuminated pr…
17/7183/ADV
2017 Approved
Ground And First Floor Building 1 126 Colindale Avenue London NW9 5HD
Change of use from Use Class B1 (office) to Use Class C3 (residential) to provide (14 Uni…
17/6829/PNO
2017 Approved
126 Colindale Avenue London NW9 5HD
Alterations to the west elevation of the building to include new windows at ground and fi…
17/4756/FUL
2017 Approved
130 Colindale Avenue London NW9 4AX
Installation of 1 Internally illuminated projector sign, 1 internally illuminated logo, 1…
17/5172/ADV
2017 Approved
85 Colindale Avenue London NW9 5HB
Roof extension involving rear dormer window and juliette balcony
17/4618/192
2017 Approved
87 Colindale Avenue London NW9 5HB
Roof extension involving rear dormer window and juliette balcony
17/4666/192
2017 Approved
128 Colindale Avenue London NW9 4AX
Installation of 3no internally illuminated fascia signs and 2no internally illuminated ha…
17/2508/ADV
2017 Approved
128 Colindale Avenue London NW9 4AX
New shop front
17/2507/FUL
2016 Approved
85-87 Colindale Avenue London NW9 5HB
First floor rear extension to 85 and 87 Colindale Avenue
16/4937/HSE
2025
126 Colindale Avenue London NW9 5HD
Variation of condition 2 (Approved Plans) of planning permission 18/5153/S73 dated 23/08/…
25/0825/S73
2024 Approved
122 Colindale Avenue London NW9 5HP
Use as 6no. self-contained flats
24/3585/191
2023 Approved
126 Colindale Avenue London NW9 5HD
Non-material amendments to planning permission reference 18/5153/S73 dated 23/08/19 for '…
23/5276/NMA
2021 Approved
126 Colindale Avenue London NW9 5HD
Variation of condition 2 (Plan Numbers) of planning permission reference H/05833/14 dated…
21/3267/S73
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

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