112 Byron Avenue, New Malden, Surrey, Merton, KT3 6EZ Data via plota.co.uk

26/HOUSE/0738 - Householder Approved

Proposal

Erection of a single storey rear extension and conversion of garage into habitable room and the alterations to the front porch. Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
21 Apr 2026
✓
Validated
15 May 2026
✓
Approved
9 Jul 2026

Approved on 9 Jul 2026 · Delegated · Last checked 1 Oct 2026

Associated applications 2

  • Householder26/HOUSE/0738This application
    Erection of a single storey rear extension and conversion of garage into habitable room and the alterations to the front porch.

Site constraints 5

Flood zone 2, rivers and sea
Medium chance: between a 1 in 100 and 1 in 1,000 annual chance from rivers, or 1 in 200 to 1 in 1,000 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Flood map ↗
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 ↗
Also on the record
Local nature reserve about 339 m away: Sir Joseph Hood Memorial Wood; Inside the Merton built-up area; Public transport access: PTAL 2 (poor), TfL 2023, for the 100 m square.
Not affected
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.

Building

Floor area94 m² (1,012 sq ft)
Energy ratingD (62 out of 100), could reach B
PropertyEnd-terrace house, 4 habitable rooms
Built1930 to 1949
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in January 2025, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

Work with planning data?

Every application in Merton - and every UK council - as a live feed, an API, or a bulk CSV export.

About Plota's data service

Important details

Council
Merton
Application type
Householder
Postcode
KT3 6EZ
Received
21 Apr 2026
Validated
15 May 2026
Ward
West Barnes
Case officer
Show
Target decision
10 Jul 2026
Decision
Grant Permission Subject To Conditions
Decision date
9 Jul 2026
Decision level
Delegated
Applicant
Show

How this decision compares

Decided in 55 days from validation, about the council's usual 56 days. Approved, as 90% 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
7 Jun 2026
Statutory expiry
10 Jul 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.