16 Overland Close Mumbles Swansea SA3 4LR Data via plota.co.uk

2026/1470/PRE - Pre App Welsh Government Refused

Proposal

Pre-application enquiry - Proposed alteration to the existing two-storey detached garage/first-floor office-store structure Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
7 Sept 2026
✓
Validated
9 Sept 2026
✓
Consultation
10 Sept 2026
✗
Refused
13 Oct 2026
Appeal
Not lodged

Refused on 13 Oct 2026 · Delegated Decision · Last checked 14 Oct 2026

Site constraints 3

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
Conservation area 58 m away: Mumbles; SSSI 500 m away: Oystermouth Old Quarry.
Not affected
Outside flood zones 2 and 3 · No listed building at the site · 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.

Building

Floor area110 m² (1,184 sq ft)
Energy ratingD (55 out of 100), could reach C
PropertySemi-detached house, 5 habitable rooms
Built1967 to 1975
HeatingBoiler and radiators, mains gas
WallsCavity wall, as built, no insulation (assumed)

From the energy performance certificate lodged in November 2013, 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
Pre App Welsh Government
Postcode
SA3 4LR
Received
7 Sept 2026
Validated
9 Sept 2026
Ward
Mumbles - Area 2
Parish
Mumbles Community Council
Case officer
Show
Target decision
30 Sept 2026
Decision
Negative
Decision date
13 Oct 2026
Decision level
Delegated Decision
Applicant
Show

Public comments

No public comments yet.

Last counted 14 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Consultation
10 Sept 2026
Comments by
10 Sept 2026
Statutory expiry
30 Sept 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.