374 Mumbles Road Mumbles Swansea SA3 5TN Data via plota.co.uk

2026/1445/FUL - Full Plans Being Considered
Change of useNew homesCommercial premises

Proposal

Change of use of former guest house (Class C1) to four flats (Class C3) Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
3 Sept 2026
✓
Validated
11 Sept 2026
✓
Consultation
22 Sept 2026
Decision
Expected by 6 Nov 2026

Under consideration

No decision has been issued yet. Plota predicts a decision between 6 Nov 2026 and 24 Nov 2026, from Swansea's recent changes of use.

Comments are open until 13 Oct 2026

Comment on this application ↗

Documents 3

Consultation & comments 2

PDF Ymgynghoriad Ymgyngoreion - Consultee Consultation Ymgynghoriad Ymgyngoreion - Consultee Consultation · 14 Sept 2026 View ↗ PDF Ymgynghoriad Ymgyngoreion - Consultee Consultation Ymgynghoriad Ymgyngoreion - Consultee Consultation · 14 Sept 2026 View ↗

Other documents 1

PDF Llythyr Cydnabyddiaeth -Acknowledgement Letter Llythyr Cydnabyddiaeth -Acknowledgement Letter · 14 Sept 2026 View ↗

All documents on the council site ↗

Site constraints 5

Flood zone 3, rivers and sea
High chance: a 1 in 100 or greater annual chance from rivers, or 1 in 200 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Flood map ↗
SSSI 49 m away: Blackpill, Swansea
Natural England may need consulting, depending on what is proposed.
Sites of special scientific interest are the best wildlife and geological sites in the country. Development likely to harm one is rarely permitted.
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 66 m away: Mumbles; 1 listed building within 150 m.
Not affected
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 area244 m² (2,626 sq ft)
Energy ratingD (60 out of 100), could reach C
PropertyMid-terrace house, 11 habitable rooms
Built1900 to 1929
HeatingBoiler and radiators, mains gas
WallsSandstone or limestone, as built, no insulation (assumed)

From the energy performance certificate lodged in January 2023, the latest held for this property. The building may have changed since. View the certificate

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Other new applications on this street

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28 Jul 2026Approved

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Single storey side extension and additional hard landscaping

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Important details

Council
Swansea
Application type
Full Plans
Postcode
SA3 5TN
Received
3 Sept 2026
Validated
11 Sept 2026
Ward
West Cross - Bay Area
Parish
Mumbles Community Council
Case officer
Show
Target decision
6 Nov 2026
Applicant
Show
Agent
Show

Decision outlook

Day 28 of the 56-day target. Swansea usually decides changes of use by day 63.

Day 2835 days to the predicted decision (day 63)
44%decided within 8 weeks
73%approved
138decided in the last year

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

Public comments

No public comments yet.

4 neighbours consulted · Last counted 5 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15182002
Planning Portal ref
PP-15182002
Neighbours
14 Sept 2026
Consultation
22 Sept 2026
Comments by
13 Oct 2026
Site or press notice
17 Sept 2026
Statutory expiry
6 Nov 2026
Env. assessment
No

Historical activity at this location

22 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2025 Approved
6 Norton Avenue Mumbles Swansea SA3 5TP
Single storey side flat roof kitchen extension, new flat roof covering to rear lean-to, g…
2025/1685/FUL
2023 Approved
4 Norton Avenue Mumbles Swansea SA3 5TP
Single storey rear extension (application for a Certificate of Proposed Lawful Developmen…
2023/1629/PLD
2023 Refused
3 Castle Acre Mumbles Swansea SA3 5TH
Rear roof extension - Non Material Amendment to planning permission 2022/2069/FUL granted…
2023/1345/NMA
2022 Approved
1 Norton Avenue Mumbles Swansea SA3 5TP
Two storey side extension, first floor rear terrace, single storey rear extension and fro…
2022/2688/FUL
2022 Approved
3 Castle Acre Mumbles Swansea SA3 5TH
Rear roof extension
2022/2069/FUL
2022 Refused
3 Castle Acre Mumbles Swansea SA3 5TH
Rear roof extension with balcony and single storey front extension
2022/1195/FUL
2022 Approved
9 Norton Avenue Mumbles Swansea SA3 5TP
Side and rear dormers, and single story side/rear extension
2022/0878/FUL
2022 Approved
2 Norton Avenue Mumbles Swansea SA3 5TP
Two storey side extension, single storey rear extension and new front porch and bay windo…
2022/0659/DOC
2022 Approved
101 Mumbles Road West Cross Swansea SA3 5TW
Two storey side extension, single storey rear extension to include extension to first flo…
2022/0759/FUL
2022 Approved
101 Mumbles Road West Cross Swansea SA3 5TW
PRE-APP Two storey side extension, single storey rear extension to include extension to f…
2022/0521/PRE
2021 Approved
101 Mumbles Road West Cross Swansea SA3 5TW
Pre-application enquiry - Two story side extension, rear balcony, addition of pitched roo…
2021/2799/PRE
2021 Refused
101 Mumbles Road West Cross Swansea SA3 5TW
Two storey side extension, single storey rear extension and extension to rear first floor…
2021/1752/FUL
2021 Approved
2 Norton Avenue Norton Swansea SA3 5TP
Two storey side extension, single storey rear extension and new front porch and bay window
2021/1378/FUL
2021 Approved
101 Mumbles Road West Cross Swansea SA3 5TW
Pre-application enquiry - Two storey side extension, extension to rear first floor balcon…
2021/1399/PRE
2021 Approved
388 Mumbles Road Mumbles Swansea SA3 5TN
Change of use of guesthouse (Class C1) to a residential dwelling (Class C3)
2021/0631/FUL
2021 Approved
101 Mumbles Road West Cross Swansea SA3 5TW
Pre-application enquiry - Two storey side extension, addition of pitched roof to porch, r…
2021/1014/PRE
2021 Approved
7 Castle Acre Mumbles Swansea SA3 5TH
Single storey front extension
2021/0443/FUL
2021 Approved
2 Norton Avenue Mumbles Swansea SA3 5TP
PRE-APP Two storey side extension
2021/0580/PRE
2021 Approved
101 Mumbles Road Mumbles Swansea SA3 5TW
PRE APP - Two storey side extension, increase existing front extension, fenestration alte…
2021/0535/PRE
2018 Approved
6 Norton Road Mumbles Swansea SA3 5TQ
Single storey rear extension, 2 no. windows to west elevation and fenestration alterations
2018/1959/FUL
2016 Refused
101 Mumbles Road West Cross Swansea SA3 5TW
Detached dwelling
2016/0888
2016 Approved
11 Norton Avenue Mumbles Swansea SA3 5TP
Single storey rear/side extension, side and rear dormers and front roof lights
2016/0910

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.