42 Chilmark Road, Streatham, London, Merton, SW16 5HB Data via plota.co.uk

26/LDCP/1834 - Lawful Development Certificate - Proposed - Section 192 Pending Consideration

Proposal

Lawful development certificate in respect of the proposed erection of a hip to gable and rear dormer roof extension and insertion of X2 rooflights to front roofslope Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
22 Aug 2026
✓
Validated
10 Sept 2026
Decision
Expected by 5 Nov 2026

This application is under consideration - no decision has been issued yet. Plota predicts a decision between 5 Nov 2026 and 21 Nov 2026, from Merton's recent extensions. Comments are open until 5 Oct 2026.

Comment on this application ↗

Site constraints 3

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; Designated open space 42 m away.
Not affected
Outside flood zones 2 and 3 · Not green belt · No listed building at the site

Checked on 29 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.

Sales history 2

Last sold for £420,000 in July 2026. Terraced house, freehold.

28 July 2026£420,000
18 June 2002£171,000

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

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Important details

Council
Merton
Application type
Lawful Development Certificate - Proposed - Section 192
Postcode
SW16 5HB
Received
22 Aug 2026
Validated
10 Sept 2026
Ward
Longthornton
Case officer
Show
Target decision
5 Nov 2026
Decision level
Delegated
Applicant
Show

Decision outlook

Day 25 of the 56-day target. Merton usually decides extensions by day 62.

Day 2537 days to the predicted decision (day 62)
45%decided within 8 weeks
91%approved
1,147decided 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
5 Oct 2026
Statutory expiry
5 Nov 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.

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