23 Western Road Lewes East Sussex BN7 1RL Data via plota.co.uk

SDNP/26/01462/HOUS - Householder Approved

Proposal

Single storey rear extension, rear air-source heat pump and fenestration alterations Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
16 Apr 2026
✓
Approved
10 Jun 2026

Approved on 10 Jun 2026 · SDNPA Delegated Decision · Last checked 5 Jul 2026

Documents 5

Consultation & comments 2

PDF Commenter’s name hidden Show General Comment · 14 May 2026 View ↗
PDF Commenter’s name hidden Show General Comment · 14 May 2026 View ↗

All documents on the council site ↗

Site constraints 5

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.
Lewes conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
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 ↗
15 listed buildings within 150 m of the postcode pin
Nearest: 13, Western Road, Grade II, about 48 m from the postcode pin · 1 Grade I, 14 Grade II
The site itself is not listed. Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Show all 15 with distances
Historic England ↗
Also on the record
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.

Building

Floor area95 m² (1,023 sq ft)
Energy ratingD (58 out of 100)
PropertyMid-terrace maisonette, 4 habitable rooms
BuiltBefore 1900
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in September 2010, 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
Householder
Postcode
BN7 1RL
Received
16 Apr 2026
Validated
16 Apr 2026
Ward
Lewes Priory Ward
Parish
Lewes Town Council
Case officer
Show
Target decision
11 Jun 2026
Decision
Approved
Decision date
10 Jun 2026
Decision level
SDNPA Delegated Decision
Applicant
Show
Agent
astula-architecture

How this decision compares

Decided in 55 days from validation, about the council's usual 56 days. Approved, as 92% of extensions here are.

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-14858025
Planning Portal ref
PP-14858025
Statutory expiry
11 Jun 2026
Env. assessment
No

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.