4 Windsor Place Mumbles Swansea SA3 4LG Data via plota.co.uk

2026/1372/FUL - Full Plans Being Considered

Proposal

Front dormer, rear rooflights, and single strorey rear extension Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
20 Aug 2026
✓
Validated
9 Sept 2026
✓
Consultation
9 Sept 2026
Decision
Expected by 4 Nov 2026

Under consideration

No decision has been issued yet. Plota predicts a decision around 30 Oct 2026, from Swansea's recent extensions.

The consultation period closed on 6 Oct 2026.

Site constraints 6

Mumbles 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 ↗
Also on the record
SSSI 209 m away: Blackpill, Swansea; 3 listed buildings within 150 m; Local nature reserve 445 m away: Mumbles Hill; National landscape 426 m away: Gower.
Not affected
Outside flood zones 2 and 3 · 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 1

Last sold for £172,500 in February 2026. Flat or maisonette, freehold.

12 February 2026£172,500Recorded as a transfer outside a standard sale

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

Building

Floor area90 m² (969 sq ft)
Energy ratingD (59 out of 100), could reach C
PropertyMid-terrace house, 4 habitable rooms
BuiltBefore 1900
HeatingBoiler and radiators, mains gas
WallsSandstone, as built, no insulation (assumed)

From the energy performance certificate lodged in August 2025, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council
Swansea
Application type
Full Plans
Postcode
SA3 4LG
Received
20 Aug 2026
Validated
9 Sept 2026
Ward
Mumbles - Area 2
Parish
Mumbles Community Council
Case officer
Show
Target decision
4 Nov 2026
Applicant
Show
Freehold owner
Show

Decision outlook

Day 49 of the 56-day target. Swansea usually decides extensions by day 51.

Day 497 days to the 56-day target
75%decided within 8 weeks
83%approved
484decided in the last year

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

Public comments

No public comments yet.

5 neighbours consulted · Last counted 27 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Neighbours
9 Sept 2026
Consultation
9 Sept 2026
Comments by
6 Oct 2026
Site or press notice
15 Sept 2026
Statutory expiry
4 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.

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.

Freehold owner: Information produced by HM Land Registry. © Crown copyright 2026. Source: HM Land Registry, UK and overseas companies that own property in England and Wales, September 2026 release.