Chesterfield Windmill Lane Barnet EN5 3HX Data via plota.co.uk

26/0051/HSE - Householder Application Approved

Proposal

Single storey side extension with balcony above. Enclosure of existing ground floor side veranda and first floor side balcony. Single storey rear extension with green roof and associated glass balustrade. Enclosure of first floor front balcony. Side and rear extensions to existing garage including addition of a pitched roof with 4no. rooflights and front and rear gable windows to provide attic roofspace, following demolition of shed Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
7 Jan 2026
✓
Approved
12 Mar 2026

Approved on 12 Mar 2026 · Delegated Decision · Last checked 26 Jul 2026

Associated applications 4

Site constraints 6

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 Named permitted development rights are withdrawn here.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.
Archaeological priority area
An assessment or field evaluation may be asked for before ground works.
The council or Historic England considers archaeology likely here. A desk-based assessment, and sometimes trial trenching, can be asked for with the application.
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; Public transport access: PTAL 1b (very poor), TfL 2023, for the 100 m square; Green belt 58 m away: London.
Not affected
Outside flood zones 2 and 3 · No listed building at the site · No scheduled monument at the site

Checked on 6 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.

Sales history 1

Last sold for £830,000 in February 2007. Detached house, freehold.

28 February 2007£830,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area264 m² (2,842 sq ft)
Energy ratingC (70 out of 100), could reach B
PropertyDetached house, 9 habitable rooms
Built1976 to 1982
HeatingBoiler and radiators, mains gas
WallsCavity wall, as built, partial insulation (assumed)

From the energy performance certificate lodged in April 2024, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council
Barnet
Application type
Householder Application
Postcode
EN5 3HX
Received
7 Jan 2026
Validated
7 Jan 2026
Ward
High Barnet
Case officer
Show
Decision
Approve subject to conditions
Decision date
12 Mar 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Buildplans

How this decision compares

Decided in 64 days from validation, 12 days slower than Barnet's median of 52 for extensions. Approved, as 75% of extensions here are.

87%decided within 8 weeks
75%approved
1,752decided in the last year

Plota live figures for extensions decided by Barnet in the last twelve months, from validation. Barnet decision record →

Consultation & key dates

Alt. reference
PP-14605768
Planning Portal ref
PP-14605768
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

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

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

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.