15 Portman Gardens London NW9 5AS Data via plota.co.uk

26/2406/192 - Proposed Lawful Development Certificate Pending Consideration
Extensions & alterations

Proposal

Roof extension involving hip to gable, rear dormer window and 3no. front facing rooflights Data via plota.co.uk

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View original council record ↗

Application progress

✓
Received
24 Jun 2026
✓
Validated
25 Jun 2026
Decision
Awaiting decision

This application is under consideration - no decision has been issued yet.

Documents 8

Plans & drawings 7

PDF PROPOSED FLOOR PLANS Drawing · 25 Jun 2026 View ↗ PDF EXISTING FLOOR PLANS Drawing · 25 Jun 2026 View ↗ PDF EXISTING ELEVATIONS Drawing · 24 Jun 2026 View ↗ PDF FIRE SAFETY PLANS Drawing · 24 Jun 2026 View ↗ PDF PROPOSED ELEVATIONS Drawing · 24 Jun 2026 View ↗ PDF EXISTING/PROPOSED SECTION Drawing · 24 Jun 2026 View ↗ PDF LOCATION/SITE PLAN Site Location Plan · 24 Jun 2026 View ↗

Application forms 1

PDF APPLICATION FORM - WITHOUT PERSONAL DATA Application Form · 24 Jun 2026 View ↗

All documents on the council site ↗

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Important details

Council
Barnet
Application type
Proposed Lawful Development Certificate
Postcode
NW9 5AS
Received
24 Jun 2026
Validated
25 Jun 2026
Ward
Burnt Oak
Case officer
Track to view
Target decision
20 Aug 2026
Applicant
Track to view
Agent
Art Consultants (UK) Ltd

Consultation & key dates

Alt. reference
PP-15036105

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

2018 Approved
First floor side extension. New front porch
18/1513/HSE
2016 Approved
Single storey side and rear extension (Retrospective Application)
16/3496/RCU
Within ~100m

Nearby activity

2025
49 The Greenway London NW9 5AU
Change of use from a single dwellinghouse (Use Class C3) to a 5 bed HMO (House in Multipl…
25/4615/FUL
2025 Approved
5 Greenway Close London NW9 5AZ
Roof extension involving side and rear dormer window with juliette balcony and 2no. front…
25/2377/192
2025
5 Greenway Close London NW9 5AZ
Single storey front and rear extension. Relocation of existing air conditioning units
25/1387/HSE
2025 Approved
5 Greenway Close London NW9 5AZ
Part single, part two storey side and rear extension. Roof extension including 1no. side…
25/0243/HSE
2025 Approved
5 Greenway Close London NW9 5AZ
Single storey rear extension with a depth of 4.25m, a maximum height of 2.95m and an eave…
25/0241/PNH
2024 Approved
17 Greenway Gardens London NW9 5AY
Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.08…
24/2574/PNH
2024 Approved
1 Greenway Gardens London NW9 5AY
Single storey side and rear extension with 1no. roof lantern following demolition of the…
24/2055/HSE
2024 Approved
1 Greenway Gardens London NW9 5AY
Roof extension involving hip to gable, rear dormer window with juliette balcony and 3no…
24/2072/192
2024 Approved
17 Greenway Gardens London NW9 5AY
Single storey rear extension. New front porch
24/1347/192
2024 Approved
17 Greenway Gardens London NW9 5AY
Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.60…
24/0594/PNH
2023 Approved
26 Greenway Gardens London NW9 5AX
Single storey rear extension
23/1953/HSE
2022 Approved
27 Greenway Gardens London NW9 5AY
Single storey rear extension with a proposed depth of 6 metres, maximum height of 3.27 me…
22/4102/PNH
2022 Approved
20 Greenway Gardens London NW9 5AX
Roof extension involving hip to gable, rear dormer window and 2no front facing rooflights
22/1951/192
2022 Refused
20 Greenway Gardens London NW9 5AX
Roof extension involving hip to gable, rear dormer window and 2no front facing rooflights
22/1180/192
2021
5 Portman Gardens London NW9 5AS
Erection of a rear storage shed (RETROSPECTIVE)
21/5089/HSE
2021 Refused
24 Greenway Gardens London NW9 5AX
Single storey rear extension
21/1865/HSE
2021 Refused
24 Greenway Gardens London NW9 5AX
Single storey rear extension with a proposed depth of 6.00 metres from original rear wall…
21/0591/PNH
2020 Refused
2 Portman Gardens London NW9 5AS
Conversion of the existing dwelling into 2no self-contained flats including part single…
20/5782/FUL
2020 Approved
2 Greenway Close London NW9 5AZ
Single storey front, side and rear extension, front porch extension, conversion of garage…
20/4072/HSE
2019 Approved
Imperial House The Hyde London NW9 5AL
Redevelopment of the Site, comprising the demolition of existing buildings and the erecti…
19/2897/FUL
2016 Refused
71 The Greenway London NW9 5AR
Part single, part two storey rear extension. Single storey front and side extensions incl…
16/3095/HSE
2016 Approved
11 Greenway Gardens London NW9 5AY
Single storey rear extension with a proposed maximum depth of 6 metres from original rear…
16/3720/PNH
2016 Withdrawn
71 The Greenway London NW9 5AR
Part single, part two storey side extension
16/1577/HSE
2016 Approved
71 The Greenway London NW9 5AR
Single storey rear extension. New front porch
16/1543/192
2016 Approved
3 Greenway Close London NW9 5AZ
Single Storey Side Extension and front porch
16/0270/HSE
Barnet
Planning Authority Score
6.5/10
Good
#79 of 292 councils
Relevant to this application:
Householder decisions

Barnet is faster than most councils at deciding householder applications, ranking #32 out of 292. Only 23% of applications have the time limit extended, well below the 40% 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 83% approved vs 90% nationally.

One of the strictest councils
only 83% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Barnet decision performance
Based on MHCLG data, 2025
76%
Overall approval rate
Below avg (87%) #277 of 292
83%
Householder approved
Below avg (90%) #252 of 292
82%
Decided in 8 weeks
Above avg (64%) #32 of 292
23%
Extended time limit
Below avg (40%) #25 of 292
53%
Minor dwellings approved
323 decided (1-9 homes)
94%
Major dwellings approved
16 decided (10+ homes)
41%
Change of use approved
123 decided
2,539
Total decisions
599 refused in 2025
Source: MHCLG planning statistics · See full council rankings