22 De Montfort Road Lewes East Sussex BN7 1SR Data via plota.co.uk

SDNP/26/02272/HOUS - Householder Approved

Proposal

Alterations to existing loft conversion including repositioning of staircase, the installation of a dormer to side roof slope and widening of rear dormer Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
9 Jun 2026
✓
Validated
12 Jun 2026
✓
Approved
5 Aug 2026

Approved on 5 Aug 2026 · LA Delegated Decision · Last checked 6 Aug 2026

Documents 6

Decision & officer reports 1

Consultation & comments 3

PDF Commenter’s name hidden Show General Comment · 16 Jul 2026 View ↗
PDF Commenter’s name hidden Show General Comment · 8 Jul 2026 View ↗
PDF Commenter’s name hidden Show General Comment · 6 Jul 2026 View ↗

All documents on the council site ↗

Site constraints 6

Grade II listed: The Black Horse Hotel
List entry 1043685 · 17 m away · 5 more listed buildings within 150 m (5 Grade II)
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 the other 5 with distances
Historic England ↗
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.
Public footpath 14 m away
Matters where it crosses or adjoins the site: obstructing a path without a diversion order is an offence, and work cannot start until the order is confirmed.
Compiled from highway authority data, not the legal definitive map. A few authorities have not published, so no path shown is not proof there is none.
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 ↗
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. 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 3

Last sold for £597,000 in October 2022. Semi-detached house, freehold.

12 October 2022£597,000
8 December 2006£360,000
28 October 2005£185,000

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

Building

Floor area112 m² (1,206 sq ft)
Energy ratingD (59 out of 100), could reach C
PropertySemi-detached house, 6 habitable rooms
Built1900 to 1929
HeatingBoiler and radiators, mains gas
WallsCavity wall, as built, no insulation (assumed)

From the energy performance certificate lodged in September 2013, the latest held for this property. The building may have changed since. View the certificate

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Important details

Application type
Householder
Postcode
BN7 1SR
Received
9 Jun 2026
Validated
12 Jun 2026
Ward
Lewes Priory Ward
Parish
Lewes Town Council
Case officer
Show
Target decision
7 Aug 2026
Decision
Approved
Decision date
5 Aug 2026
Decision level
LA Delegated Decision
Applicant
Show

How this decision compares

Decided in 54 days from validation, about the council's usual 57 days. Approved, as 92% of extensions here are.

50%decided within 8 weeks
92%approved
696decided in the last year

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

Public comments

2comments received
2 neutral

6 neighbours consulted · Last counted 6 Aug 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14994147
Planning Portal ref
PP-14994147
Statutory expiry
7 Aug 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.

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

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.