21 Thornton Road, Wimbledon, Merton, SW19 4NG Data via plota.co.uk

26/HOUSE/0187 - Householder Approved
Extensions & alterations

Proposal

Erection of a single storey extension. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
9 Feb 2026
✓
Validated
1 Jun 2026
✓
Approved
week of 28 Sept 2026

Approved in the week of 28 Sept 2026 · Delegated · Last checked 30 Sept 2026

Documents 9

Statements & assessments 1

PDF planning/uploads/891427901777312765:: ::application form for householders in flood risk zones General Correspondence · 27 Apr 2026 View ↗

Plans & drawings 2

PDF 26HOUSE0187-21-Thornton-Road-Proposed-Plans-and-Elevations-amended-rev-E Plans · 25 Sept 2026 View ↗ PDF PL-030-Front-garden-planning-REV-B Plans · 18 Jun 2026 View ↗

Other documents 6

PDF PL_030 - Front garden_planning.pdf General Correspondence · 12 Mar 2026 View ↗ PDF cil_21 Thornton Rd.pdf General Correspondence · 12 Mar 2026 View ↗ PDF PL_020 - Proposed_planning.pdf General Correspondence · 12 Mar 2026 View ↗ PDF 21-Thornton-Road-Wimbledon-Merton-SW19-4NG.pdf General Correspondence · 12 Mar 2026 View ↗ PDF PL_010 - Existing_planning.pdf General Correspondence · 12 Mar 2026 View ↗ PDF ApplicationFormRedacted.pdf General Correspondence · 12 Mar 2026 View ↗

All documents on the council site ↗

Site constraints 5

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 ↗
8 listed buildings within 150 m of the postcode pin
Nearest: 47-51, Denmark Road Sw19, Grade II, about 47 m from the postcode pin · 8 Grade II
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.
Show all 8 with distances
Historic England ↗
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 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 £1,450,000 in October 2025. Detached house, freehold.

28 October 2025£1,450,000Recorded as a transfer outside a standard sale
26 July 2013£975,000
1 November 2005£625,000
22 March 1999£370,000

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

Building

Floor area106 m² (1,141 sq ft)
Energy ratingC (72 out of 100)
PropertyDetached house, 4 habitable rooms
Built1983 to 1990
HeatingBoiler and radiators, mains gas
WallsCavity wall, as built, insulated (assumed)

From the energy performance certificate lodged in June 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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Other new applications on this street

9 Sept 2026Pending

23 Thornton Road, Wimbledon, Merton, SW19 4NG

APPLICATION FOR REPLACEMENT OF THE EXISTING REAR BASEMENT (KITCHEN) WINDOW WITH ...

26/HOUSE/2001
28 Aug 2026Pending

30 Thornton Road, Wimbledon, Merton, SW19 4NG

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

26/TCA/1967
30 Jun 2026Pending

12 Thornton Road, Wimbledon, Merton, SW19 4NE

APPLICATION FOR VARIATION OF CONDITION 2 (APPROVED PLANS), ATTACHED TO LBM PLANN...

26/SEC73/1343
18 May 2026Approved

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

APPLICATION FOR DISCHARGE OF CONDITION 4 (REFUSE AND RECYCLING), 8 (CYCLE PARKIN...

26/DOC/0984

Nearby new applications

2 Oct 2026Pending

4 Sunnyside, Wimbledon, Merton, SW19 4SL

G1 - LIME TREES X 5 - CYCLIC POLLARDING TO MANAGE SIZE, REDUCE RISK OF FAILURE A...

26/TCA/2220
29 Sept 2026Pending

ATRIUM HOUSE, 54B Ridgway, Wimbledon, Merton, SW19 4QR

T1 Pittosporum - Removal to ground level

26/TCA/2195
25 Sept 2026Pending

62 Murray Road, Wimbledon, Merton, SW19 4PE

REAR & SIDE GARDEN MAGNOLIA GRANDIFLORA (T1) TO REDUCE THE CROWN BY 20 PERCENT (...

26/TCA/2122
23 Sept 2026Pending

26 Denmark Avenue, Wimbledon, Merton, SW19 4HQ

FRONT : 2 ACACIAS, 1 HORSE CHESTNUT - REDUCE BACK TO LAST CUTTING POINTS. DEAD C...

26/TCA/2090
18 Sept 2026Pending

36 Lauriston Road, Wimbledon, Merton, SW19 4TQ

THE PROPERTY HAS BEEN SUBJECT TO SEVERAL YEARS OF LIMITED MANAGEMENT, RESULTING ...

26/TCA/2083
15 Sept 2026Pending

Flat 4, 11 Thornton Hill, Wimbledon, Merton, SW19 4HU

T1 - 1X GINKGO BILOBA (MAIDENHAIR TREE) TO BE CROWN REDUCED TO MOST RECENT REDUC...

26/10/2069

Important details

Council
Merton
Application type
Householder
Postcode
SW19 4NG
Received
9 Feb 2026
Validated
1 Jun 2026
Ward
Hillside
Case officer
Show
Target decision
27 Jul 2026
Decision date
week of 28 Sept 2026
Decision level
Delegated
Applicant
Show
Agent
Irene Siljama
Freehold owner
Show

Consultation & key dates

Comments by
12 Jul 2026
Statutory expiry
27 Jul 2026

Historical activity at this location

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

Within ~100m

Nearby activity

2025 Withdrawn
19 Hillside Wimbledon SW19 4NL
ERECTION OF A CONSERVATORY ON THE SOUTH ELEVATION
25/P3736/INVALID
2025
33 Denmark Road Wimbledon SW19 4PQ
ERECTION OF A GROUND AND FIRST FLOOR REAR AND SIDE EXTENSION. CHANGES FROM PERMISSION 25/…
25/P3749
2025 Approved
Thornton House 39 Thornton Road Wimbledon SW19 4NQ
APPLICATION FOR EXTERNAL ALTERATIONS AT ROOF LEVEL INCLUDING REPLACEMENT SLATE ROOF TO MA…
25/P2599
2025
12 Thornton Road Wimbledon SW19 4NE
ERECTION OF A PART ONE, PART TWO STOREY REAR WRAP AROUND EXTENSION. ADDITION OF WINDOWS A…
25/P3503
2025 Approved
Faraday House 39 Thornton Road Wimbledon SW19 4NQ
APPLICATION FOR THE REPLACEMENT OF EXISTING WINDOWS WITH TIMBER FRAMED SASH WINDOWS.
25/P1737/INVALID
2025 Approved
Faraday House 39 Thornton Road Wimbledon SW19 4NQ
APPLICATION FOR THE REPLACEMENT OF EXISTING WINDOWS WITH TIMBER FRAMED SASH WINDOWS.
25/P1737
2025 Refused
33 Denmark Road Wimbledon SW19 4PQ
ERECTION OF A GROUND FLOOR REAR AND SIDE EXTENSION, FIRST FLOOR REAR EXTENSION, SECOND FL…
25/P1558
2025
The Coach House Thornton House Thornton Road Wimbledon SW19 4NG
APPLICATION FOR THE RETENTION OF EXISTING ROOF COVERING.
25/P2208
2025 Approved
31 Thornton Road Wimbledon SW19 4NG
T1 - LIME - REDUCE CROWN BACK TO PREVIOUS POINTS (1.5M OFF HEIGHT AND WIDTH).
25/T1854
2025 Approved
The Coach House 39 Thornton Road Wimbledon SW19 4NQ
APPLICATION FOR MINOR INTERNAL AND EXTERNAL ALTERATIONS INCLUDING NEW FENESTRATION AND BO…
25/P0563
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
20 Hillside Wimbledon SW19 4NL
ON THE BORDER OF THE 20 & 21: EUCALYPTUS - REMOVAL OF TREE
25/T0857
2025 Approved
33 Denmark Road Wimbledon SW19 4PQ
ERECTION OF A GROUND FLOOR REAR AND SIDE EXTENSION, AND REAR FIRST FLOOR EXTENSION.
25/P0552
2025 Approved
30 Denmark Road Wimbledon London SW19 4PG
APPLICATION FOR THE CONVERSION OF ROOFSPACE AND THE ERECTION OF A REAR DORMER ROOF EXTENS…
25/P0398
2024 Approved
24 Denmark Road Wimbledon SW19 4PG
DEMOLITION AND REBUILDING OF GROUND AND FIRST-FLOOR LEVELS WITH A SLIGHTLY WIDER FOOTPRIN…
24/P3115
2024 Approved
20 Hillside Wimbledon SW19 4NL
DEMOLITION OF EXISTING TWO STOREY DWELLING AND REPLACEMENT WITH A TWO STOREY DWELLING PLU…
24/P2870
2024 Refused
33 Denmark Road Wimbledon SW19 4PQ
ERECTION OF A GROUND FLOOR REAR AND SIDE EXTENSION, AND REAR EXTENSION PROPOSED ON FIRST…
24/P3394
2024 Refused
30 Denmark Road Wimbledon London SW19 4PG
APPLICATION FOR A LOFT CONVERSION WITH A SIDE DORMER WINDOW ROOF EXTENSION WITH 1 ROOFLIG…
24/P3067
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
7 Hillside Wimbledon SW19 4NH
FRONT GARDEN: CRAB APPLE TREE - REMOVE
24/T3242
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
34 Thornton Road Wimbledon London SW19 4NG
CREATION OF LIGHTWELL TO REAR OF THE BUILDING, INSTALLATION OF REPLACEMENT GLAZING AND RE…
16/P2584
2016 Approved
14 Hillside West Wimbledon London SW19 4NH
FALSE ACACIATO HAVE HEIGHT AND WIDTH REDUCED BY APPROX 2-3 METRES.
16/T2483
2016 Refused
Walnut Tree Cottage 1 St John's Road Wimbledon London SW19 4PH
FRONT GARDEN: 1X SILVER BIRCH TREE TO BE REMOVED.
16/T2239
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.

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.

Freehold owner: Information produced by HM Land Registry. © Crown copyright 2026. Source: HM Land Registry, UK and overseas companies that own property in England and Wales, September 2026 release.