5 Southwood Avenue Hornsey London N6 5RY Data via plota.co.uk

HGY/2026/1206 - Householder planning permission Approved

Proposal

Single storey glass extension to the side of the existing outrigger, installation of new windows and doors, and installation of 1no low profile rooflight to existing outrigger pitched roof. Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
around 4 Jun 2026
✓
Approved
20 Aug 2026

Approved on 20 Aug 2026 · Delegated Decision · Last checked 22 Aug 2026

Site constraints 6

Highgate 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 ↗
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 ↗
Local nature reserve about 110 m away: Parkland Walk
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.
1 listed building within 150 m of the postcode pin
Nearest: 225, Archway Road N6, Grade II, about 26 m from the postcode pin
The site itself is not listed. Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Historic England ↗
Also on the record
Inside the Haringey built-up area; Public transport access: PTAL 4 (good), 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 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 4

Last sold for £2,263,100 in December 2025. Terraced house, freehold.

5 December 2025£2,263,100
11 July 2016£1,925,000
19 November 1999£595,000
23 January 1998£363,200

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

Building

Floor area202 m² (2,174 sq ft)
Energy ratingD (55 out of 100), could reach C
PropertySemi-detached house, 6 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 2024, 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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Important details

Council
Haringey
Application type
Householder planning permission
Postcode
N6 5RY
Received
around 4 Jun 2026
Validated
4 Jun 2026
Ward
Highgate
Case officer
Show
Target decision
30 Jul 2026
Decision
Approve with Conditions
Decision date
20 Aug 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Colin Mulhern

How this decision compares

Decided in 77 days from validation, 22 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

1comment received
1 neutral

Last counted 22 Aug 2026

Read the comments on the council site ↗

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

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.