100 Gibbon Road Newhaven East Sussex BN9 9ER Data via plota.co.uk

LW/26/0477 - Certificate of Lawful Use/Dev (Proposed) Awaiting decision

Proposal

Erection of single-storey rear extension, replacement of existing rear window with door and addition of steps Data via plota.co.uk

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View original council record ↗Last checked 28 Oct 2026, 18:23

Street View

Application progress

✓

Received

16 Sept 2026

Decision

Expected by 11 Nov 2026

Under consideration

No decision has been issued yet. Plota predicts a decision around 7 Nov 2026, from Lewes's recent extensions.

Documents

View the documents on the council's website ↗

Site constraints 4

Radon affected area, class 5

An estimated 10 to 30% of homes reach the radon action level. Indicative for the 1 km square, which takes the highest class found in it; a radon test gives the answer for a building.

From the British Geological Survey and UK Health Security Agency indicative atlas. Under building regulations, as the BRE guide BR 211 (2023) sets out, new buildings and extensions need basic radon protection from class 3 in England and Wales and from class 2 in Scotland, and full protection from class 5. The class at the site itself, from the detailed BGS map, decides which.

UKHSA radon ↗

Local nature reserve 253 m away: Castle Hill, Newhaven

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.

Also on the record

Inside the Newhaven built-up area; Priority habitat 14 m away: Deciduous woodland.

Not affected

Outside flood zones 2 and 3 · Not green belt · No listed building at the site

Checked on 28 October 2026. Historic England, the Environment Agency, Natural England, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI) 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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Important details

Council: Lewes
Application type: Certificate of Lawful Use/Dev (Proposed)
Postcode: BN9 9ER
Received: 16 Sept 2026
Validated: 16 Sept 2026
Ward: Newhaven South
Parish: Newhaven Town Council
Case officer: Show
Target decision: 11 Nov 2026
Applicant: Show
Agent: Martin Dean Design

Decision outlook

Day 43 of the 56-day target. Lewes usually decides extensions by day 52.

prediction

Day 4313 days to the 56-day target

74%decided within 8 weeks

94%approved

167decided in the last year

Plota live figures for extensions decided by Lewes in the last twelve months, from validation. Lewes decision record →

Public comments

No public comments yet.

Last counted 28 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference: PP-15219918
Planning Portal ref: PP-15219918
Statutory expiry: 11 Nov 2026
Env. assessment: No

Lewes

Planning Authority Score

7/10

Good

#62 of 296 councils

Relevant to this application:

Householder decisions

Lewes ranks #126 out of 296 councils for householder decision speed. Only 25% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Householder applications are slightly more likely to be approved here (94%) than the national average (90%).

Rarely extends deadlines

decisions usually arrive on time

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

Lewes decision statistics

Based on MHCLG data, the year to March 2026

89%

Overall approval rate

Above avg (87%) #134 of 296

94%

Householder approved

Above avg (90%) #111 of 296

69%

Decided in 8 weeks

Above avg (63%) #126 of 296

25%

Extended time limit

Below avg (41%) #30 of 296

76%

Minor dwellings approved

63 decided (1-9 homes)

100%

Major dwellings approved

5 decided (10+ homes)

88%

Change of use approved

16 decided

394

Total decisions

42 refused in the year to March 2026