38 Tretawn Gardens London NW7 4NR Data via plota.co.uk

26/2521/HSE - Householder Application Approved

Proposal

Roof extension involving triple rear dormer window, 2no. front facing rooflights and new side gable windows Data via plota.co.uk

View original council record ↗Last checked

Application progress

Received
3 Jul 2026
Validated
8 Jul 2026
Consultation
16 Jul 2026
Approved
2 Sept 2026

Approved on 2 Sept 2026 · Last checked 2 Sept 2026

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 Named permitted development rights are withdrawn here.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 ↗
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
Tree preservation order 10 m away: The London Borough of Barnet (Housing Site No. 14 Lawrence Street, Mill Hill, NW7) Forestry Act 1951 made under The Town and Country Planning Act 1947; 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 11 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
Householder Application
Postcode
NW7 4NR
Received
3 Jul 2026
Validated
8 Jul 2026
Ward
Mill Hill
Case officer
Show
Target decision
2 Sept 2026
Decision
Approve subject to conditions
Decision date
2 Sept 2026
Applicant
Show
Agent
uksmartbuild.com Ltd

How this decision compares

Decided in 56 days from validation, about the council's usual 53 days. Approved, as 74% of extensions here are.

87%decided within 8 weeks
74%approved
1,436decided 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 2 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15058981
Site or press notice
16 Jul 2026
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