7 Cobham Avenue, New Malden, Merton, KT3 6EP Data via plota.co.uk

Pending 26/LDCP/1749 - Lawful Development Certificate - Proposed - Section 192
Extensions & alterations
Council
Merton 4.5/10
Date received
2 Sept 2026
Postcode
KT3 6EP
Type
Lawful Development Certificate - Proposed - Section 192

Description

Application for a lawful development certificate in respect of the proposed erection of a hip to gable, rear dormer roof extension and 2 front rooflights Data via plota.co.uk

Get alerts nearby Council site ↗

Last checked

Decision outlook

Plota predicts a decision between 17 Oct 2026 and 25 Oct 2026, from recent lawful development certificates across the UK.

Day 12 of the 56-day target. Councils usually decide lawful development certificates by day 50.

Day 1244 days to the 56-day target
84%decided within 8 weeks
85%approved
19,862decided in the last year

Plota live figures for lawful development certificates decided across the UK in the last twelve months, from validation; too few recent lawful development certificates in Merton to go on. Merton decision record →

Site constraints 3

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
Inside the Merton built-up area.
Not affected
Not green belt · No scheduled monument at the site

Checked on 11 September 2026. Historic England, the Environment Agency, Natural England 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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Historical activity at this location

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

Within ~100m

Nearby activity

2025 Approved
6 Byron Avenue New Malden KT3 6EX
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
25/P1720/INVALID
2025 Approved
6 Byron Avenue New Malden KT3 6EX
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
25/P1720
2024 Approved
17 Stanley Avenue New Malden KT3 6EW
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPEECT OF A REAR DORMER AND x3 ROOF…
24/P0570
2024 Refused
2 Cobham Avenue New Malden KT3 6EP
ERECTION OF A PART GROUND/PART FIRST FLOOR REAR EXTENSION, ENLARGEMENT OF ROOF OVER EXIST…
24/P0035
2024 Withdrawn
2 Cobham Avenue New Malden KT3 6EP
CHANGE OF USE OF C3 FOUR FLATS TO C3 TWO FLATS, ERECTION OF A GROUND AND FIRST-FLOOR EXTE…
24/P0035/INVALID
2023 Approved
19 Byron Avenue New Malden KT3 6EX
ERECTION OF A SINGLE STOREY REAR/INFILL SIDE EXTENSION .
23/P2862/INVALID
2023 Approved
19 Byron Avenue New Malden KT3 6EX
ERECTION OF A SINGLE STOREY REAR/INFILL SIDE EXTENSION .
23/P2862
2023 Approved
19 Byron Avenue New Malden KT3 6EX
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
23/P2454
2023 Approved
2 Byron Avenue New Malden KT3 6EX
ERECTION OF A SINGLE STOREY SIDE EXTENSION.
23/P1323
2022 Approved
19 Byron Avenue New Malden KT3 6EX
RETROSPECTIVE PERMISSION OF DEMOLITION OF THE EXISTING GARAGE AND CHANGES TO BOUNDARY TRE…
22/P2859
2021 Approved
4 Byron Avenue New Malden KT3 6EX
PROPOSED SINGLE STOREY REAR EXTENSION & PROPOSED REAR ROOF EXTENSION WITH 2x ROOFLIGHTS T…
21/P3632
2022 Approved
5 Byron Avenue New Malden KT3 6EX
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
22/P0310
2021 Approved
29 Cobham Avenue New Malden KT3 6EP
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
21/P3210
2021 Approved
29 Cobham Avenue New Malden KT3 6EP
ERECTION OF A SINGLE STOREY SIDE AND REAR EXTENSION.
21/P3209
2020 Refused
1A Stanley Avenue New Malden KT3 6EW
ERECTION OF A TWO STOREY REAR EXTENSION AND HIP TO GABLE AND REAR ROOF EXTENSIONS TO CONV…
20/P3079
2021 Withdrawn
1A Stanley Avenue New Malden KT3 6EW
ERECTION OF A GROUND FLOOR EXTENSION, FIRST FLOOR EXTENSION AND REAR ROOF EXTENSION TO CO…
21/P1038
2020 Approved
3 Stanley Avenue New Malden KT3 6EW
ERECTION OF A PERGOLA TO EXISTING REAR EXTENSION
20/P1954
2020 Approved
7 Stanley Avenue New Malden KT3 6EW
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
20/P1279/INVALID
2020 Approved
7 Stanley Avenue New Malden KT3 6EW
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
20/P1279
2020 Withdrawn
24 Cobham Avenue New Malden KT3 6EP
EMAIL RECD WITH INSTRUCTIONS TO WITHDRAW 05/05/2020 APPLICATION FOR A LAWFUL DEVELOPMENT…
20/P1415
2018 Approved
36 Byron Avenue New Malden KT3 6EX
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE FOR THE PROPOSED ERECTION OF A SINGLE ST…
18/P1694/INVALID
2018 Approved
19 Stanley Avenue New Malden KT3 6EW
TWO STOREY SIDE AND SINGLE STOREY REAR EXTENSION AND REAR FACING DORMER WINDOW
18/P0705
2017 Approved
19 Byron Avenue New Malden KT3 6EX
ERECTION OF A TIMBER,CLAD SINGLE STOREY ANCILLARY ANNEXE
18/P0291
2017 Approved
30 Cobham Avenue New Malden KT3 6EP
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A…
17/P4261
2016 Approved
45 Byron Avenue New Malden Surrey KT3 6EY
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE FOR THE PROPOSED ERECTION OF A HIP TO GA…
16/P2906
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