46 Michleham Down London N12 7JN Data via plota.co.uk

26/3222/HSE - Householder Application Approved
Extensions & alterations

Proposal

Single storey side/rear extension with 3no. rooflights following demolition of the existing storage/utility structure. Changes to fenestration Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
3 Sept 2026
✓
Consultation
10 Sept 2026
✓
Approved
14 Oct 2026

Approved on 14 Oct 2026 · Delegated Decision · Last checked 15 Oct 2026

Documents 5

Decision & officer reports 1

PDF DN: APPROVE HSE WITH CONDS Decision Notice · 14 Oct 2026 View ↗

Statements & assessments 1

PDF PLANNING DESIGN AND ACCESS STATEMENT Planning statement · 2 Sept 2026 View ↗

Plans & drawings 1

PDF EXISTING/PROPOSED Drawing · 2 Sept 2026 View ↗

Application forms 1

PDF APPLICATION FORM REDACTED Application Form · 2 Sept 2026 View ↗

Other documents 1

PDF CIL CIL Document · 2 Sept 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 Named permitted development rights are withdrawn here.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 ↗
Also on the record
Inside the Barnet built-up area; Public transport access: PTAL 1a (very poor), TfL 2023, for the 100 m square; Green belt 65 m away: London; Metropolitan Open Land 99 m away; Natural England's Provisional ALC map (1:250,000, 1970s) had this area as grade 4, but it predates the buildings here and the current map does not class it as farmland.
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 2

Last sold for £1,247,000 in July 2026. Semi-detached house, freehold.

17 July 2026£1,247,000
30 April 2004£575,000

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

Building

Floor area207 m² (2,228 sq ft)
Energy ratingD (65 out of 100), could reach C
PropertySemi-detached house, 6 habitable rooms
Built1930 to 1949
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in February 2023, the latest held for this property. The building may have changed since. View the certificate

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Other new applications on this street

26 May 2026Approved

49 Michleham Down London N12 7JJ

Roof extension involving rear dormer window with juliette balcony, 4no. front fa...

26/1956/192

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29 Sept 2026Pending

13 Twineham Green London N12 7EP

Part single, part two storey rear extension with pitched roof and 3no. rooflight...

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10 Sept 2026Pending

76 Southover London N12 7HB

Change of use from Hair Salon (Class E) to amalgamate first floor dwelling into ...

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12 Aug 2026Approved

15 Cissbury Ring North London N12 7AL

Roof extension involving rear dormer window with juliette balcony, 3no. front fa...

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10 Aug 2026Approved

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Single storey side/rear infill, first floor side extension. Conversion of garage...

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Important details

Council
Barnet
Application type
Householder Application
Postcode
N12 7JN
Received
3 Sept 2026
Validated
3 Sept 2026
Ward
Totteridge & Woodside
Case officer
Show
Target decision
29 Oct 2026
Decision
Approve subject to conditions
Decision date
14 Oct 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Detailed Planning Ltd

How this decision compares

Decided in 41 days from validation, 11 days faster than Barnet's median of 52 for extensions. Approved, as 75% of extensions here are.

87%decided within 8 weeks
75%approved
1,904decided 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 15 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PLP-00006415
Comments by
1 Oct 2026
Site or press notice
10 Sept 2026
Statutory expiry
29 Oct 2026

Historical activity at this location

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

Within ~100m

Nearby activity

2025 Approved
14 Michleham Down London N12 7JN
First floor rear extension. Roof extension involving new crown roof with rear dormer wind…
25/2248/HSE
2025
33 Michleham Down London N12 7JJ
Single storey rear extension with 1no. rooflight. Single storey side extension with re-lo…
25/1230/HSE
2023 Approved
53 Michleham Down London N12 7JJ
Single storey side/rear extension with new access steps and ramps and new associated rear…
23/5519/HSE
2024 Approved
3 Shortgate London N12 7JP
Single storey side and rear extension with 3no. rooflights following demolition of the ex…
24/0161/HSE
2024 Approved
9 Shortgate London N12 7JP
Roof extension involving side and rear dormer windows. Conversion of garage into habitabl…
24/0055/HSE
2023 Approved
55 Michleham Down London N12 7JJ
Single storey rear extension with new patio area and associated access steps and balustra…
23/5420/HSE
2023 Approved
47 Michleham Down London N12 7JJ
Single storey rear extension
23/3429/HSE
2023 Approved
55 Michleham Down London N12 7JJ
Roof extension including hip to gable, rear dormer window with juliette balcony, 3 no. ro…
23/3569/192
2022 Approved
53 Michleham Down London N12 7JJ
Single storey side/rear extension with new access steps and ramps and new associated rear…
22/5595/HSE
2022 Refused
53 Michleham Down London N12 7JJ
Single storey side/rear extension with new access steps and ramps and new associated rear…
22/4236/HSE
2022 Approved
33 Michleham Down London N12 7JJ
Single storey rear extension with rooflight. Single storey side extension with re-located…
22/0277/HSE
2021 Approved
23 Michleham Down London N12 7JJ
Roof extension involving hip to gable, rear dormer window and 2no front and side facing r…
21/5553/HSE
2021 Approved
23 Michleham Down London N12 7JJ
Conversion of the existing garage into habitable room, insertion of window to replace the…
21/5283/HSE
2021 Approved
39 Michleham Down London N12 7JJ
Alterations to rear landscaping with new decking/steps and planting beds
21/1207/HSE
2020 Approved
25 Michleham Down London N12 7JJ
Demolition of existing side extensions. Part single part two storey side and rear extensi…
20/5078/HSE
2020 Approved
36 Michleham Down London N12 7JN
Single storey rear extension
20/5401/HSE
2020 Approved
41 Michleham Down London N12 7JJ
Single storey rear extension with raised patio following demolition of existing conservat…
20/0221/HSE
2020 Approved
41 Michleham Down London N12 7JJ
Roof extension involving hip to gable, new rear dormer window with Juliette balcony, 1no…
20/0218/192
2018 Approved
39 Michleham Down London N12 7JJ
Single storey side extension following demolition of existing garage and garden store. Re…
18/4126/HSE
2017 Approved
57 Michleham Down London N12 7JJ
Roof extension involving hip to gable, rear dormer window, 3no. rooflights to front eleva…
17/7550/192
2017 Approved
31 Michleham Down London N12 7JJ
Roof extension involving 1 no. new rear dormer window, 1no. rooflight to front and new wi…
17/3410/192
2017 Refused
16 Michleham Down London N12 7JN
Roof extension involving hip to gable, 2no rear dormer windows, 2no rooflights to front e…
17/1180/HSE
2016 Approved
12 Shortgate London N12 7JP
Two storey side extension
16/7751/HSE
2016 Approved
32 Michleham Down London N12 7JN
Roof extension involving hip to gable, rear dormer window, 1no. rooflights to front and n…
16/6948/192
2016 Approved
4 Shortgate London N12 7JP
Extensions to roof involving hip to gable end, rear dormer with juliette balcony and 3 no…
16/1253/192
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

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.