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

26/3342/HSE - Householder Application Pending Consideration
Extensions & alterations

Proposal

Single storey side and rear extension with 3no. rooflights Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
11 Sept 2026
✓
Validated
14 Sept 2026
✓
Consultation
17 Sept 2026
Decision
Expected by 9 Nov 2026

This application is under consideration - no decision has been issued yet. Plota predicts a decision between 28 Oct 2026 and 8 Nov 2026, from Barnet's recent extensions. Comments are open until 8 Oct 2026.

Comment on this application ↗

Documents 6

Plans & drawings 4

PDF LOCATION PLAN Site Location Plan · 11 Sept 2026 View ↗ PDF PROPOSED Drawing · 11 Sept 2026 View ↗ PDF BLOCK PLANS Block plan · 11 Sept 2026 View ↗ PDF EXISTING Drawing · 11 Sept 2026 View ↗

Application forms 1

PDF APPLICATION FORM REDACTED Application Form · 11 Sept 2026 View ↗

Other documents 1

PDF CIL CIL Document · 11 Sept 2026 View ↗

All documents on the council site ↗

Site constraints 4

Flood zone 3, rivers and sea
High chance: a 1 in 100 or greater annual chance from rivers, or 1 in 200 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Flood map ↗
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 Named permitted development rights are withdrawn here.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.
Not affected
Not green belt · No listed building at the site · No scheduled monument at the site

Checked on 18 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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Other new applications on this street

24 Jun 2026Refused

15 Portman Gardens London NW9 5AS

Roof extension involving hip to gable, rear dormer window and 3no. front facing ...

26/2406/192

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26/3446/RCU
11 Sept 2026Pending

Mar House 50 The Hyde London NW9 5NG

Non material amendment to planning permission 22/1932/FUL dated 06/02/2024 for '...

26/3330/NMA
11 Sept 2026Pending

3 Birchwood Court, Edgware, HA8 5JE

Proposed conversion of garage into habitable room with replacement of garage doo...

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8 Sept 2026Pending

106 The Greenway London NW9 5AP

Part single, part two storey side and rear extension with pitched roof following...

26/3267/HSE
12 Aug 2026Pending

132A Burnt Oak Broadway Edgware HA8 0BB

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Important details

Council
Barnet
Application type
Householder Application
Postcode
NW9 5AS
Received
11 Sept 2026
Validated
14 Sept 2026
Ward
Burnt Oak
Case officer
Show
Target decision
9 Nov 2026
Applicant
Show
Agent
Ideal Design Ltd

Decision outlook

Day 21 of the 56-day target. Barnet usually decides extensions by day 52.

Day 2135 days to the 56-day target
87%decided within 8 weeks
75%approved
1,696decided 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 29 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PLP-00008178
Comments by
8 Oct 2026
Site or press notice
17 Sept 2026
Statutory expiry
9 Nov 2026

Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

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
6.2/10
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