10 Downside Lewes East Sussex BN7 1EE Data via plota.co.uk

SDNP/26/03725/LDP - Lawful Development Cert (Proposed) Application in Progress

Proposal

Erection of a detached single-storey outbuilding within the rear garden of the existing dwellinghouse. Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
28 Sept 2026
Decision
Expected by 23 Nov 2026

Under consideration

No decision has been issued yet. Plota predicts a decision between 23 Nov 2026 and 2 Dec 2026, from South Downs's recent extensions.

Site constraints 6

South Downs National Park
The park authority decides applications here. Great weight to conserving the landscape; major development restricted.
Landscape, scenic beauty and wildlife carry great weight, and major development is only allowed in exceptional circumstances.
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
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 ↗
Registered battlefield about 90 m away: Battle of Lewes 1264
Its setting is a consideration for work nearby.
Registered parks and gardens, battlefields, world heritage sites and protected wrecks are designated heritage assets: harm needs clear and convincing justification.
Historic England ↗
Also on the record
1 listed building within 150 m of the postcode pin; Inside the Lewes built-up area.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. 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.

Sales history 1

Last sold for £725,000 in December 2014. Detached house, freehold.

17 December 2014£725,000

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

Building

Floor area169 m² (1,819 sq ft)
Energy ratingC (69 out of 100), could reach B
PropertyDetached house, 8 habitable rooms
Built1983 to 1990
HeatingBoiler and radiators, mains gas
WallsTimber frame, as built, insulated (assumed)

From the energy performance certificate lodged in May 2014, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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Important details

Application type
Lawful Development Cert (Proposed)
Postcode
BN7 1EE
Received
28 Sept 2026
Validated
28 Sept 2026
Ward
Lewes Priory Ward
Parish
Lewes Town Council
Case officer
Show
Target decision
23 Nov 2026
Decision level
SDNPA Delegated Decision
Applicant
Show

Decision outlook

Day 11 of the 56-day target. South Downs usually decides extensions by day 56.

Day 1145 days to the 56-day target
50%decided within 8 weeks
92%approved
657decided in the last year

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

Consultation & key dates

Alt. reference
PP-15186552
Planning Portal ref
PP-15186552
Statutory expiry
23 Nov 2026
Env. assessment
No

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.