12 Thornton Road, Wimbledon, Merton, SW19 4NE Data via plota.co.uk

25/P3503 - Full Planning Permission Approved
Extensions & alterations

Proposal

Erection of a part one, part two storey rear wrap around extension. Addition of windows and a roof light Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
26 Nov 2025
✓
Approved
14 Jan 2026

Approved on 14 Jan 2026 · Delegated · Last checked 1 Oct 2026

Documents 13

Decision & officer reports 2

PDF Delegated Report Officer Report · 25 Mar 2026 View ↗ PDF Decision Notice Decision Notice · 25 Mar 2026 View ↗

Statements & assessments 1

PDF Commenter’s name hidden Show Supporting Document Planning Public View ↗

Plans & drawings 7

PDF Commenter’s name hidden Show Supporting Document Planning Public View ↗
PDF Commenter’s name hidden Show Supporting Document Planning Public View ↗
PDF Commenter’s name hidden Show Supporting Document Planning Public View ↗
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PDF Commenter’s name hidden Show Supporting Document Planning Public View ↗
PDF Commenter’s name hidden Show Supporting Document Planning Public View ↗
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Other documents 3

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PDF Commenter’s name hidden Show Supporting Document Planning Public View ↗
PDF Commenter’s name hidden Show Supporting Document Planning Public View ↗

All documents on the council site ↗

Site constraints 7

Grade II listed: 62 63, Denmark Road Sw19
List entry 1080920 · 29 m away · 10 more listed buildings within 150 m (10 Grade II)
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.
Show the other 10 with distances
Historic England ↗
Wimbledon West 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: 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
Special area of conservation 445 m away: Wimbledon Common; SSSI 445 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 scheduled monument at the site

Checked on 6 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 £1,495,000 in August 2025. Terraced house, freehold.

27 August 2025£1,495,000

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

Building

Floor area134 m² (1,442 sq ft)
Energy ratingE (50 out of 100), could reach B
PropertySemi-detached house, 5 habitable rooms
Built1930 to 1949
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in April 2016, the latest held for this property. The building may have changed since. View the certificate

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Other new applications on this street

9 Sept 2026Pending

23 Thornton Road, Wimbledon, Merton, SW19 4NG

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T1 ASH (X1) -REDUCE CROWN BACK TO PREVIOUS POINTS OF REDUCTION (APPROXIMATELY 2M...

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18 May 2026Approved

THORNTON LODGE, 39 Thornton Road, Wimbledon, Merton, SW19 4NQ

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26/DOC/0984
11 May 2026Approved

Non Allocated Parking, THORNTON HOUSE Thornton Road, Wimbledon, Merton

T1 - ASH - FELL TO GROUND LEVEL T2 - UNKNOWN SPECIES - FELL TO GROUND LEVEL T3 -...

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Important details

Council
Merton
Application type
Full Planning Permission
Postcode
SW19 4NE
Received
26 Nov 2025
Validated
26 Nov 2025
Ward
Hillside
Parish
Historic
Case officer
Show
Target decision
22 Jan 2026
Decision
Grant Permission Subject To Conditions
Decision date
14 Jan 2026
Decision level
Delegated
Applicant
Show
Agent
3W Architecture Limited

How this decision compares

Decided in 49 days from validation, 9 days faster than Merton's median of 58 for extensions. Approved, as 91% of extensions here are.

48%decided within 8 weeks
91%approved
1,384decided 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

Statutory expiry
22 Jan 2026

Historical activity at this location

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

Within ~100m

Nearby activity

2025
75 - 77 Ridgway Wimbledon London SW19 4ST
ADVERTISEMENT CONSENT APPLICATION FOR THE INSTALLATION OF EXTERNAL SIGNAGE TO THE EXISTIN…
25/P3786
2025 Withdrawn
19 Hillside Wimbledon SW19 4NL
ERECTION OF A CONSERVATORY ON THE SOUTH ELEVATION
25/P3736/INVALID
2025 Approved
3 Berkeley Place Wimbledon London SW19 4NN
DEMOLITION OF EXISTING SIDE/REAR EXTENSION, ERECTION OF NEW SINGLE STOREY SIDE REAR EXTEN…
25/P1026
2025 Approved
1A Denmark Road Wimbledon SW19 4PG
DEMOLITION OF AN EXISTING SINGLE STOREY GARAGE AND THE ERECTION OF A TWO STOREY DWELLING…
25/P0576/INVALID
2025 Approved
1A Denmark Road Wimbledon SW19 4PG
DEMOLITION OF AN EXISTING SINGLE STOREY GARAGE AND THE ERECTION OF A TWO STOREY DWELLING…
25/P0576
2025 Approved
21 Thornton Road Wimbledon London SW19 4NG
FRONT GARDEN: T1 & T2 - SILVER BIRCH - REDUCE CROWN BY 2M BACK GARDEN: T3 - TULIP TREE…
25/T0867
2025 Approved
4 Hillside Wimbledon SW19 4NH
T1 - APPLE - PRUNE, REMOVE LOWEST LIMB, REDUCE ALL REMAINING CANOPY GROWTH TO ABOVE THE G…
25/T1083
2024 Approved
10 Hillside Wimbledon SW19 4NH
ERECTION OF A GROUND AND FIRST-FLOOR LEFT SIDE EXTENSION, CHANGES ON THE ROOF ON THE EXIS…
24/P3362
2024 Approved
4 Hillside West Wimbledon London SW19 4NH
REPLACEMENT OF THE EXISTING GROUND FLOOR TIMBER BOUNDARY WALL FACING THORNTON ROAD WITH A…
24/P2792
2024 Approved
97 Ridgway Wimbledon London SW19 4SX
ERECTION OF A GROUND FLOOR REAR AND SIDE INFILL EXTENSION.
24/P3208
2024 Approved
7 Hillside Wimbledon SW19 4NH
FRONT GARDEN: CRAB APPLE TREE - REMOVE
24/T3242
2024 Approved
10 Denmark Avenue Wimbledon SW19 4HF
ERECTION OF A SINGLE STOREY REAR EXTENSION WITH REPLACEMENT GLAZING AND ROOFLIGHTS. CONVE…
24/P2104
2024 Approved
49 Denmark Road Wimbledon SW19 4PQ
APPLICATION FOR GENERAL REPAIR TO EXISTING WINDOWS. REMOVAL OF REAR DOOR AND WINDOW AND R…
24/P1885/INVALID
2024 Approved
49 Denmark Road Wimbledon SW19 4PQ
LISTED BUILDING CONSET APPLICATION FOR THE GENERAL REPAIR TO EXISTING WINDOWS. REMOVAL OF…
24/P1886
2024 Approved
49 Denmark Road Wimbledon SW19 4PQ
APPLICATION FOR GENERAL REPAIR TO EXISTING WINDOWS. REMOVAL OF REAR DOOR AND WINDOW AND R…
24/P1885
2024 Approved
49 Denmark Road Wimbledon SW19 4PQ
LISTED BUILDING CONSET APPLICATION FOR THE GENERAL REPAIR TO EXISTING WINDOWS. REMOVAL OF…
24/P1886/INVALID
2024 Approved
Ridgway Stables 93 Ridgway Wimbledon
RETENTION AND RESTORATION OF BOUNDARY WALLS, PART DEMOLITION OF ALL OTHER EXISTING STABLE…
24/P0914
2024 Approved
9 Thornton Road Wimbledon SW19 4NE
T1 - WALNUT - REDUCE BY APPROX. 2M FROM HEIGHT AND WIDTH
24/T1922
2024 Approved
5 Berkeley Place Wimbledon SW19 4NN
T1 - EUCALYPTUS X1 - REDUCE CROWN BY 1-1.5M ALL AROUND.
24/T1818
2024 Approved
12 Hillside West Wimbledon London SW19 4NH
SILVER BIRCH - REDUCE CROWN BY 4M
24/T1498
2016 Approved
59 Denmark Road Wimbledon SW19 4PQ
CONVERSION OF ROOFSPACE INTO HABITABLE ROOMS, UNBLOCKING OF PREVIOUSLY EXISTING WINDOW, I…
16/P0702
2016 Approved
6 Thornton Road East Wimbledon London SW19 4NF
RENEWAL OF EXISTING WINDOWS WITH NEW TIMBER WINDOWS TO FRONT ELEVATION AND PVC WINDOWS TO…
16/P2680
2016 Approved
9 Berkeley Place Wimbledon London SW19 4NN
5 DAY NOTICE: 1X CONIFER TO BE FELLED.
16/T2775
2016 Refused
6 Thornton Road East Wimbledon London SW19 4NF
RENEWAL OF EXISTING WINDOWS WITH NEW PVCU WINDOWS
16/P1708
2016 Withdrawn
2a Lauriston Road Wimbledon London SW19 4TQ
9 X LIME TREES SURROUNDING 2 LAURISTON ROAD TO BE RE POLLARD.
16/T2107
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
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.

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use

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.