20 Derwent Avenue Barnet EN4 8LX Data via plota.co.uk

26/2836/192 - Proposed Lawful Development Certificate Approved

Proposal

Roof extension involving rear dormer window with juliette balcony Data via plota.co.uk

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Application progress

✓

Received

31 Jul 2026

✓

Approved

5 Aug 2026

Approved on 5 Aug 2026 · Delegated Decision · Last checked 8 Aug 2026

Documents 11

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Important details

Council: Barnet
Application type: Proposed Lawful Development Certificate
Postcode: EN4 8LX
Received: 31 Jul 2026
Validated: 31 Jul 2026
Ward: Brunswick Park
Case officer: Show
Target decision: 25 Sept 2026
Decision: Lawful
Decision date: 5 Aug 2026
Decision level: Delegated Decision
Applicant: Show
Agent: Show

Public comments

No public comments yet.

Last counted 8 Aug 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference: PP-15125468

Barnet

Planning Authority Score

6.2/10

Average

#90 of 296 councils

Relevant to this application:

Householder decisions

Barnet is faster than most councils at deciding householder applications, ranking #42 out of 296. Only 25% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Barnet is also one of the strictest councils - it refuses more householder applications than almost any other, with only 82% approved vs 90% nationally.

One of the strictest councils

only 82% approved vs 90% nationally

These figures are council-wide context, not a prediction for this application. View full council performance

Barnet decision performance

Based on MHCLG data, the year to March 2026

75%

Overall approval rate

Below avg (87%) #285 of 296

82%

Householder approved

Below avg (90%) #264 of 296

79%

Decided in 8 weeks

Above avg (63%) #42 of 296

25%

Extended time limit

Below avg (41%) #29 of 296

55%

Minor dwellings approved

319 decided (1-9 homes)

90%

Major dwellings approved

21 decided (10+ homes)

41%

Change of use approved

132 decided

2,541

Total decisions

625 refused in the year to March 2026