17 Thornton Way London NW11 6SE Data via plota.co.uk

25/4277/HSE - Householder Application Approved

Proposal

Changes to fenestration; new ground floor bay window, new dormer window on second floor to south elevation. New ground floor air source heat pump on north elevation (AMENDED DESCRIPTION)(UPDATED PLANS) Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
27 Oct 2025
✓
Validated
28 Oct 2025
✓
Consultation
22 Jan 2026
✓
Approved
17 Feb 2026

Approved on 17 Feb 2026 · Delegated Decision · Last checked 27 Oct 2026

Documents 13

Decision & officer reports 1

PDF DN: APPROVE HSE WITH CONDS Decision Notice · 17 Feb 2026 View ↗

Statements & assessments 1

PDF DESIGN AND ACCESS STATEMENT Design and Access Statement · 24 Oct 2025 View ↗

Plans & drawings 3

PDF PROPOSED Revised Drawing · 14 Jan 2026 View ↗ PDF EXISTING Revised Drawing · 16 Dec 2025 View ↗ PDF THE LOCATION PLAN Site Location Plan · 24 Oct 2025 View ↗

Application forms 2

PDF APPLICATION FORM - WITHOUT PERSONAL DATA Application Form · 24 Oct 2025 View ↗ PDF COMMUNITY INFRASTRUCTURE LEVY - COMPLETED FORM CIL Document · 24 Oct 2025 View ↗

Other documents 6

IMG SITE NOTICE Photo · 5 Feb 2026 View ↗ IMG SITE NOTICE Photo · 5 Feb 2026 View ↗ IMG SITE NOTICE Photo · 5 Feb 2026 View ↗ IMG SITE NOTICE Photo · 5 Feb 2026 View ↗ IMG SITE NOTICE Photo · 5 Feb 2026 View ↗ IMG SITE NOTICE Photo · 21 Jan 2026 View ↗

All documents on the council site ↗

Site constraints 7

Hampstead Garden Suburb conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Council document ↗
2 Article 4 directions
Article 4 Small Houses in Multiple Occupation (HMO) Area 1 · Article 4 for Hampstead Garden Suburb CA 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 Named permitted development rights are withdrawn here.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 ↗
Local nature reserve 169 m away: Big Wood & Little Wood
Work nearby can need a habitats assessment.
Harm to a protected site is only accepted where there is no alternative and an overriding public interest.
Also on the record
2 listed buildings within 150 m; Inside the Barnet built-up area; Public transport access: PTAL 1b (very poor), TfL 2023, for the 100 m square.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 2 November 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 3

Last sold for £2,725,000 in December 2025. Detached house, freehold.

1 December 2025£2,725,000
11 November 2011£1,750,000
17 July 1998£705,000

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

Building

Floor area222 m² (2,390 sq ft)
Energy ratingD (60 out of 100), could reach C
PropertySemi-detached house, 8 habitable rooms
Built1930 to 1949
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in December 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
NW11 6SE
Received
27 Oct 2025
Validated
28 Oct 2025
Ward
Garden Suburb
Case officer
Show
Target decision
17 Feb 2026
Decision
Approve subject to conditions
Decision date
17 Feb 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Archplan

How this decision compares

Decided in 112 days from validation, 56 days slower than Barnet's median of 56 for householder applications. Approved, as 81% of householder applications here are.

78%decided within 8 weeks
81%approved
1,290decided in the last year

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

Public comments

No public comments yet.

Last counted 27 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14434855
Planning Portal ref
PP-14434855
Comments by
12 Feb 2026
Site or press notice
22 Jan 2026
Statutory expiry
23 Dec 2025

Historical activity at this location

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

Within ~100m

Nearby activity

2025
15 Middleway London NW11 6SN
1 x Mature Beech (applicants ref. T1) - Approximately 9.00m. Reduce overlong branches whi…
TCP/0797/25
2025
35 Southway London NW11 6RX
1 x Mature Oak (applicants ref. T1) - Crown thin density by 25%, reduce back to clear bui…
TCP/0658/25
2025 Approved
23 Middleway London NW11 6SN
1 x Rowan Mountain Ash - Reduce crown by approximately 10% and thin out by 1-1.5 metres…
TCP/0508/25
2025
16 Middleway London NW11 6SP
1 x Macrocarpa - Cut to ground level.
TCP/0196/25
2024
21 Middleway London NW11 6SN
1 x Red Plum (applicants ref. T1) - Fell to ground level. 1 x Ornamental Maple (applicant…
TCP/0708/24
2024
16 Middleway London NW11 6SP
1 x Magnolia - Crown thin by 15%. Reduce unruly height and spread approx. 0.5m height and…
TCP/0419/24
2024 Approved
23 Middleway London NW11 6SN
Replacement of existing windows to match existing
24/2439/HSE
2024
23 Middleway London NW11 6SN
1 x Laburnum (applicants ref. T1) - Fell to ground level and replace with more suitable s…
TCP/0314/24
2024 Approved
23 Middleway London NW11 6SN
Reinstatement of vehicular access following removal of hedge. Reinstatement of stone driv…
24/0155/HSE
2024
35 Southway London NW11 6RX
1 x Laurel (applicants ref. T1) - Fell to combat subsidence damage to 33 Southway, London…
TCP/0044/24
2023 Approved
25 Middleway London NW11 6SH
1 x Weeping Willow - Reduce density by pollarding at previous pruning points, remove dead…
TCP/0756/23
2023 Approved
33 Southway London NW11 6RX
1 x Mature Oak (applicants ref. T1) - Crown thin approx by 20%, lift low branches and tri…
TCP/0529/23
2023 Approved
20 Middleway London NW11 6SP
1 x Mature Field Maple (applicants ref. T1) -Approximately 6.00m: Thin crown density thro…
TCP/0468/23
2023 Approved
25 Middleway London NW11 6SH
1 x Weeping Willow - Reduce the density by pollarding at previous pruning points, includi…
TCP/0417/23
2023 Approved
31 Southway London NW11 6RX
"Demolition of the existing garage. Single Storey Side/Rear Extension. Replacement of 1no…
23/1870/HSE
2022 Approved
26 Middleway London NW11 6SG
3 x Sycamore - Reduce the density of these trees by crown thinning approximately 25% incl…
TCP/0468/22
2022 Approved
15 Middleway London NW11 6SN
1 x Beech (applicants ref. T1) - Approximately 9.00m. Thin crown density by approximately…
TCP/0318/22
2022 Approved
53 Southway London NW11 6SB
1 x Oak (applicants ref. T1) - Crown clean removing dead wood, remove 1 split unsafe limb…
TCP/0083/22
2022 Approved
15 Middleway London NW11 6SN
External alterations to the rear and side elevations including; Replacement of the existi…
22/0150/HSE
2022 Approved
40 Southway London NW11 6SA
1 x Mature Oak - Crown thin density by 25%, remove deadwood, retain basic height and shap…
TPP/0079/22
2016 Approved
41 Southway London NW11 6RX
New basement level including 2No. lightwells to east elevation and 1No. lightwell to west…
16/5371/HSE
2016 Approved
25 Middleway London NW11 6SH
1 x Willow - Thin by 30% as specified, Reduce height as specified1 x Magnolia - Reduce he…
TCP/0482/16
2016 Approved
25 Middleway London NW11 6SH
Extension to roof including side and rear dormer, to facilitate a loft conversion
16/4971/HSE
2016 Approved
24 Thornton Way London NW11 6SJ
1 x Conifer - Fell
TCF/0369/16
2016 Approved
32 Middleway London NW11 6SG
Installation of 1no air-conditioning unit positioned within an timber enclosure in rear o…
16/0736/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

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.