24 Onslow Gardens Hornsey London N10 3JU Data via plota.co.uk

HGY/2026/1679 - Householder planning permission Approved
Extensions & alterations

Proposal

Erection of a single storey rear and side extension and installation of rear rooflights to infill extension. (AMENDED DESCRIPTION) Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
around 15 Jun 2026
✓
Approved
28 Aug 2026

Approved on 28 Aug 2026 · Delegated Decision · Last checked 24 Sept 2026

Documents 7

Decision & officer reports 2

PDF DM Final Officer Report.pdf PDF · 28 Aug 2026 View ↗ PDF DM Decision.pdf PDF · 28 Aug 2026 View ↗

Consultation & comments 1

PDF Objector’s name hidden Show PDF · 5 Aug 2026 View ↗

Other documents 4

PDF Proposed - Rev A PDF · 27 Aug 2026 View ↗ PDF DAS.pdf PDF · 12 Jun 2026 View ↗ PDF Existing.pdf PDF · 12 Jun 2026 View ↗ PDF ApplicationFormRedacted.pdf PDF · 12 Jun 2026 View ↗

All documents on the council site ↗

Site constraints 6

Local nature reserve about 66 m away: Queen's 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.
Air quality management area: Haringey 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
Inside the Haringey built-up area; Public transport access: PTAL 2 (poor), TfL 2023, for the 100 m square; Metropolitan Open Land about 65 m away.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. 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 £2,325,000 in August 2022. Terraced house, freehold.

16 August 2022£2,325,000
31 July 2007£1,310,000
12 December 1996£330,000

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

Building

Floor area228 m² (2,454 sq ft)
Energy ratingD (67 out of 100), could reach B
PropertyMid-terrace house, 10 habitable rooms
Built1900 to 1929
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in January 2022, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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Other new applications on this street

30 Sept 2026Pending

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Important details

Council
Haringey
Application type
Householder planning permission
Postcode
N10 3JU
Received
around 15 Jun 2026
Validated
15 Jun 2026
Ward
Muswell Hill
Case officer
Show
Decision
Approve with Conditions
Decision date
28 Aug 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Show

How this decision compares

Decided in 74 days from validation, 19 days slower than Haringey's median of 55 for householder applications. Approved, as 90% of householder applications here are.

67%decided within 8 weeks
90%approved
55,362decided in the last year

Plota live figures for householder applications decided across the UK in the last twelve months, from validation; too few recent householder applications in Haringey to go on. Haringey decision record →

Public comments

2comments received
2 objecting

Last counted 24 Sept 2026

Read the comments on the council site ↗

Historical activity at this location

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

Within ~100m

Nearby activity

2025 Approved
50 Woodland Gardens, Hornsey, London, N10 3UA
De-conversion of 3 x self-contained flats back into a single dwelling house.
HGY/2025/2672
2025 Approved
31 Onslow Gardens, Hornsey, London, N10 3JT
Replacement of all existing timber windows with double glaze windows, replacement of exis…
HGY/2025/1491
2025 Approved
7 Onslow Gardens, Hornsey, London, N10 3JT
Demolition of existing ground floor rear extension and first floor conservatory. Erection…
HGY/2025/0466
2024 Approved
7 Onslow Gardens, Hornsey, London, N10 3JT
Demolition of existing ground floor rear extension and first floor conservatory. Erection…
HGY/2024/3042
2024 Approved
36 Woodland Gardens, Hornsey, London, N10 3UA
Replacement of existing single storey conservatory with glazed ground floor rear extensio…
HGY/2024/2736
2024 Approved
Second Floor Flat C, 26 Woodland Gardens, Hornsey, London, N10 3UA
Replacement window to front dormer window on the second floor.
HGY/2024/1065
2023 Approved
13 Onslow Gardens, Hornsey, London, N10 3JT
Retention of use of the property as a large HMO (sui generis), including its reduction fr…
HGY/2023/2202
2023 Approved
15 Onslow Gardens, Hornsey, London, N10 3JT
Formation of new crossover and off street parking to front of property
HGY/2023/2695
2023 Refused
13 Onslow Gardens, Hornsey, London, N10 3JT
Use of existing outbuilding, to provide sleeping accommodation ancillary to existing prop…
HGY/2023/1659
2023 Approved
13 Onslow Gardens, Hornsey, London, N10 3JT
Construction of an outbuilding
HGY/2023/0540
2023 Approved
Ground Floor Flat, 72 Woodland Gardens, Hornsey, London, N10 3UA
Alterations to existing rear extension, roof light with new external windows
HGY/2023/0721
2022 Approved
19, Onslow Gardens, London, N10 3JT
Erection of a single storey ground floor side infill to existing outrigger, lower ground…
HGY/2022/1245
2022 Approved
Flat 1, 21, Woodland Gardens, London, N10 3UE
Erection of single storey rear extension, addition of new rear doors and creation of rais…
HGY/2022/1731
2022 Approved
Flat 1, 46, Onslow Gardens, London, N10 3JX
Proposed single storey rear/side infill extension to ground floor garden flat with green…
HGY/2022/1952
2022 Withdrawn
13, Onslow Gardens, London, N10 3JT
Change of use of property from C4 use (accommodation for 3-6 unrelated individuals) to Su…
HGY/2022/0368
2022 Approved
1, Onslow Gardens, London, N10 3JT
Erection of a single storey rear infill kitchen extension.
HGY/2022/1698
2022 Refused
1, Onslow Gardens, London, N10 3JT
Erection of single storey rear infill extension. Alterations and roof extension of existi…
HGY/2022/1170
2021 Approved
15, Onslow Gardens, London, N10 3JT
Single storey ground floor extension to rear of building. Re-modelling of first floor out…
HGY/2021/3354
2021 Approved
Ground Floor Flat A, 26, Woodland Gardens, London, N10 3UA
Replacement of 3 x like for like front timber sash windows; replacement of 1x side timber…
HGY/2021/2079
2021 Approved
5, Woodland Gardens, London, N10 3UE
Rear roof extension and associated roof terrace to existing two storey outrigger and 4 x…
HGY/2021/1723
2017 Approved
12 Woodland Gardens London N10 3UA
Single storey rear extension and installation of three new windows
HGY/2017/0934
2016 Approved
20 Onslow Gardens London N10 3JU
Single storey rear/side extension with 2x sky lanterns, replace existing 1st floor roof w…
HGY/2016/2640
2016 Withdrawn
20 Onslow Gardens London N10 3JU
First floor rear balcony with glazed balustrade and obscure 1.7m high glazed panels to si…
HGY/2016/2735
2016 Approved
20 Onslow Gardens London N10 3JU
Application for a Lawful Development Certificate for rear roof extension to facilitate a…
HGY/2016/2639
2016 Approved
108 Muswell Hill Road London N10 3JD
Change of use from studio to use as studio and residential annex to main building
HGY/2016/0406
Haringey
Planning Authority Score
4/10
Below average
#192 of 296 councils
Relevant to this application:
Householder decisions

Haringey is slower than most councils at deciding householder applications, ranking #209 out of 296. Householder applications are slightly more likely to be approved here (91%) than the national average (90%).

Slower than most councils
for householder decisions
These figures are council-wide context, not a prediction for this application. View full council performance
Haringey decision statistics
Based on MHCLG data, the year to March 2026
85%
Overall approval rate
Below avg (87%) #206 of 296
91%
Householder approved
Above avg (90%) #174 of 296
55%
Decided in 8 weeks
Below avg (63%) #209 of 296
40%
Extended time limit
Below avg (41%) #151 of 296
83%
Minor dwellings approved
279 decided (1-9 homes)
100%
Major dwellings approved
8 decided (10+ homes)
46%
Change of use approved
28 decided
1,469
Total decisions
217 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.

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.