13 Hazelbury Close, Wimbledon, Merton, SW19 3JL Data via plota.co.uk

26/HOUSE/1716 - Householder Refused

Proposal

Erection of a two-storey rear extension, erection of a front porch & conversion of garage into habitable room Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
5 Aug 2026
✗
Refused
30 Sept 2026
Appeal
Not lodged

Refused on 30 Sept 2026 · Delegated · Last checked 30 Sept 2026

Site constraints 4

Air quality management area: Merton 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 303 m away: Merton Park Green Walks
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
Inside the Merton built-up area; Public transport access: PTAL 2 (poor), TfL 2023, for the 100 m square.
Not affected
Outside flood zones 2 and 3 · Not green belt · No listed building at the site

Checked on 17 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.

Building

Floor area124 m² (1,335 sq ft)
Energy ratingD (65 out of 100), could reach C
PropertyDetached house, 6 habitable rooms
Built1996 to 2002
HeatingBoiler and radiators, mains gas
WallsCavity wall, as built, insulated (assumed)

From the energy performance certificate lodged in September 2025, 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
Merton
Application type
Householder
Postcode
SW19 3JL
Received
5 Aug 2026
Validated
5 Aug 2026
Ward
Merton Park
Case officer
Show
Target decision
30 Sept 2026
Decision
Refuse Permission
Decision date
30 Sept 2026
Decision level
Delegated
Applicant
Show
Agent
A&S Design

How this decision compares

Decided in 56 days from validation, about the council's usual 56 days. Refused, as 10% of extensions here are.

52%decided within 8 weeks
90%approved
1,414decided in the last year

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

Consultation & key dates

Comments by
14 Sept 2026
Statutory expiry
30 Sept 2026
Merton
Planning Authority Score
4.5/10
Below average
#173 of 296 councils
Relevant to this application:
Householder decisions

Merton ranks #196 out of 296 councils for householder decision speed. Householder applications are slightly more likely to be approved here (92%) than the national average (90%).

These figures are council-wide context, not a prediction for this application. View full council performance
Merton decision statistics
Based on MHCLG data, the year to March 2026
89%
Overall approval rate
Above avg (87%) #135 of 296
92%
Householder approved
Above avg (90%) #158 of 296
57%
Decided in 8 weeks
Below avg (63%) #196 of 296
39%
Extended time limit
Below avg (41%) #139 of 296
54%
Minor dwellings approved
82 decided (1-9 homes)
100%
Major dwellings approved
11 decided (10+ homes)
83%
Change of use approved
24 decided
1,079
Total decisions
115 refused in the year to March 2026

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.