27 Marryat Road, Wimbledon, Merton, SW19 5BE Data via plota.co.uk

26/NMA/1750 - Non-Material Amendment - Section 96A Refused

Proposal

Application for non-material amendments to application 25/P3152, proposed installation of 4 new metal clad dormer windows, new handmade clay rooftiles to replace concrete tiles, proposed conservation style rooflights, new aluminium double glazed windows and internal alterations. Conversion of existing loft space over garage, a proposed small swimming pool and proposed vehicular and pedestrian gates. Non-material amendment relates to increasing the pitch of the roof from 33 degrees to 42 degrees. Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
14 Aug 2026
✗
Refused
29 Sept 2026
Appeal
Not lodged

Refused on 29 Sept 2026 · Delegated · Last checked 30 Sept 2026

Associated applications 2

Site constraints 8

Wimbledon North 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 ↗
Archaeological priority area
An assessment or field evaluation may be asked for before ground works.
The council or Historic England considers archaeology likely here. A desk-based assessment, and sometimes trial trenching, can be asked for with the application.
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 ↗
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
Special area of conservation 416 m away: Wimbledon Common; SSSI 416 m away: Wimbledon Common SSSI; Inside the Merton 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 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.

Sales history 1

Last sold for £3,601,000 in December 2021. Detached house, freehold.

9 December 2021£3,601,000

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

Building

Floor area190 m² (2,045 sq ft)
Energy ratingD (57 out of 100), could reach C
PropertyDetached bungalow, 6 habitable rooms
Built1976 to 1982
HeatingBoiler and radiators, mains gas
WallsCavity wall, filled cavity

From the energy performance certificate lodged in November 2020, 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
Non-Material Amendment - Section 96A
Postcode
SW19 5BE
Received
14 Aug 2026
Validated
14 Aug 2026
Ward
Village
Case officer
Show
Target decision
11 Sept 2026
Decision
Refuse Non-Material Amendment To Planning Permission
Decision date
29 Sept 2026
Decision level
Delegated
Applicant
Show
Agent
CORNERSTONE ARCHITECTURAL DESIGN LTD

How this decision compares

Decided in 46 days from validation, 10 days faster than Merton's median of 56 for extensions. 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
7 Sept 2026
Statutory expiry
11 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

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.