186 Cannon Hill Lane, Raynes Park, Merton, SW20 9BY Data via plota.co.uk

26/PAHE/1242 - Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Approved
Extensions & alterations

Proposal

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 6m, maximum height of 3.5m and eaves height of 2.5m. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
23 Jun 2026
✓
Validated
30 Jun 2026
✓
Approved
24 Jul 2026

Approved on 24 Jul 2026 · Delegated · Last checked 30 Sept 2026

Documents 3

Decision & officer reports 1

PDF Decision Notice - Prior Approval (Class A household Ext) - Not Required Decision Notice · 24 Jul 2026 View ↗

Plans & drawings 1

PDF Plans Plans · 30 Jun 2026 View ↗

Application forms 1

PDF Application Form Redacted Application Forms/Certificates · 30 Jun 2026 View ↗

All documents on the council site ↗

Site constraints 6

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 134 m away: Cannon Hill Common
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.
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
Inside the Merton built-up area; Public transport access: PTAL 1b (very poor), TfL 2023, for the 100 m square; Metropolitan Open Land 25 m away.
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.

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Other new applications on this street

21 Oct 2026Pending

166 Cannon Hill Lane, Raynes Park, Merton, SW20 9BY

APPLICATION FOR PRIOR APPROVAL IN RESPECT OF THE PROPOSED ERECTION OF A SINGLE S...

26/PAHE/2358
12 Oct 2026Pending

122 Cannon Hill Lane, Raynes Park, Merton, SW20 9ET

APPLICATION FOR DISCHARGE OF CONDITION 8 (LANDSCAPING AND TREE PLANTING SCHEME) ...

26/DOC/2286
22 Jun 2026Approved

463 Cannon Hill Lane, Raynes Park, Merton, SW20 9HH

APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED EREC...

26/LDCP/1283

Nearby new applications

21 Oct 2026Pending

166 Cannon Hill Lane, Raynes Park, Merton, SW20 9BY

APPLICATION FOR PRIOR APPROVAL IN RESPECT OF THE PROPOSED ERECTION OF A SINGLE S...

26/PAHE/2358
12 Oct 2026Pending

119 Elm Walk, Raynes Park, Merton, SW20 9EF

APPLICATION FOR PRIOR APPROVAL IN RESPECT OF THE PROPOSED ERECTION OF A SINGLE S...

26/PAHE/2271
12 Oct 2026Pending

122 Cannon Hill Lane, Raynes Park, Merton, SW20 9ET

APPLICATION FOR DISCHARGE OF CONDITION 8 (LANDSCAPING AND TREE PLANTING SCHEME) ...

26/DOC/2286
6 Oct 2026Pending

63 Ashridge Way, Morden, Surrey, Merton, SM4 4ED

APPLICATION FOR PRIOR APPROVAL IN RESPECT OF THE PROPOSED ERECTION OF A SINGLE S...

26/PAHE/2235
5 Oct 2026Pending

151 Whatley Avenue, Raynes Park, Merton, SW20 9NT

APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED EREC...

26/LDCP/2216
22 Sept 2026Pending

322 Martin Way, Raynes Park, Merton, SW20 9BX

HIP TO GABLE ROOF EXTENSION, ERECTION OF REAR FACING DORMER, ERECTION OF TWO-STO...

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Important details

Council
Merton
Application type
Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1
Postcode
SW20 9BY
Received
23 Jun 2026
Validated
30 Jun 2026
Case officer
Show
Target decision
11 Aug 2026
Decision
Prior Approval Not Required
Decision date
24 Jul 2026
Decision level
Delegated
Applicant
Show
Agent
Show

How this decision compares

Decided in 24 days from validation, 32 days faster than Merton's median of 56 for extensions. 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

Statutory expiry
11 Aug 2026

Historical activity at this location

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

Within ~100m

Nearby activity

2025 Approved
160 Cannon Hill Lane Raynes Park SW20 9BY
APPLICATION FOR A SINGLE STOREY REAR EXTENSION.
25/P3063
2025 Approved
160 Cannon Hill Lane Raynes Park SW20 9BY
APPLICATION FOR THE ERECTION OF A FRONT PORCH EXTENSION
25/P2815
2025 Approved
188 Cannon Hill Lane Raynes Park SW20 9BY
APPLICATION FOR THE ERECTION OF A SINGLE-STOREY REAR EXTENSION INCLUDING THE DEMOLITION O…
25/P0616/INVALID
2025 Approved
188 Cannon Hill Lane Raynes Park SW20 9BY
APPLICATION FOR THE ERECTION OF A SINGLE-STOREY REAR EXTENSION INCLUDING THE DEMOLITION O…
25/P0616
2024 Approved
Ground Floor 149 Cannon Hill Lane Raynes Park SW20 9BZ
CHANGE OF USE FROM TATTOO PARLOUR (SUI GENERIS USE) TO BEAUTY SALON (SUI GENERIS USE)
24/P2971
2022 Approved
186 Cannon Hill Lane Raynes Park London SW20 9BY
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
22/P1368
2022 Approved
186 Cannon Hill Lane Raynes Park London SW20 9BY
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
22/P1368/INVALID
2021 Approved
2 Northway Morden SM4 4HF
ERECTION OF A DETACHED, SINGLE STOREY RENDERED OUTBUILDING IN REAR GARDEN.
21/P3105
2020 Withdrawn
149A Cannon Hill Lane Raynes Park SW20 9ET
ERECTION OF A FIRST FLOOR REAR EXTENSION AND REAR ROOF EXTENSION TO UPPER FLOOR FLAT.
20/P2776/INVALID
2020 Approved
190 Cannon Hill Lane Raynes Park London SW20 9BY
ERECTION OF A SINGLE STOREY REAR EXTENSION AND FRONT PORCH EXTENSION
20/P0670
2018 Refused
149A Cannon Hill Lane Raynes Park SW20 9ET
ERECTION OF A FIRST FLOOR REAR EXTENSION AND REAR ROOF EXTENSION IN CONNECTION WITH THE P…
18/P4441/INVALID
2018 Refused
149A Cannon Hill Lane Raynes Park SW20 9ET
ERECTION OF A FIRST FLOOR REAR EXTENSION AND REAR ROOF EXTENSION IN CONNECTION WITH THE P…
18/P4441
2019 Refused
190 Cannon Hill Lane Raynes Park London SW20 9BY
ERECTION OF A PART SINGLE PART TWO STOREY REAR EXTENSION.
19/P4270
2019 Approved
208 Cannon Hill Lane Wimbledon London SW20 9BY
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF R…
19/P3924
2019 Approved
3 Northway Morden SM4 4HE
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
19/P2901
2019 Refused
3 Northway Morden SM4 4HE
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
19/P2201
2017 Approved
169 Cannon Hill Lane Raynes Park London SW20 9BZ
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
17/P2731
2017 Approved
11 Northway Morden SM4 4HE
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
17/P1977
2017 Refused
15 Northway Morden SM4 4HE
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE FOR THE PROPOSED ERECTION OF A SINGLE ST…
17/P0816/INVALID
2017 Refused
15 Northway Morden SM4 4HE
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE FOR THE PROPOSED ERECTION OF A SINGLE ST…
17/P0816
2016 Approved
15 Northway Morden SM4 4HE
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE FOR A PROPOSED SINGLE STOREY REAR EXTENS…
16/P2581
2016 Approved
202 & 204 Cannon Hill Lane Raynes Park London SW20 9BY
ERECTION OF A DUAL TWO STOREY REAR EXTENSION SPANNING 202 & 204 CANNON HILL LANE.
16/P1811
2016 Approved
202 & 204 Cannon Hill Lane Raynes Park London SW20 9BY
ERECTION OF A DUAL TWO STOREY REAR EXTENSION SPANNING 202 & 204 CANNON HILL LANE.
16/P1811/INVALID
2025 Approved
188 Cannon Hill Lane Raynes Park SW20 9BY
APPLICATION FOR PRIOR APPROVAL IN RESPECT OF THE PROPOSED ERECTION OF A SINGLE STOREY REA…
25/P0615
2020 Approved
190 Cannon Hill Lane Raynes Park London SW20 9BY
APPLICATION TO DETERMINE WHETHER PRIOR APPROVAL IS REQUIRED IN RESPECT OF THE PROPOSED ER…
20/P0736
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