10 Castle Avenue Mumbles Swansea SA3 4BA Data via plota.co.uk

2026/1729/FUL - Full Plans Being Considered

Proposal

Demolition of existing kitchen extension, part demolition of the existing garage & proposed single storey rear / side extensions. Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
19 Oct 2026
✓
Consultation
22 Oct 2026
Decision
Expected by 14 Dec 2026

Under consideration

No decision has been issued yet. Plota predicts a decision between 1 Dec 2026 and 10 Dec 2026, from Swansea's recent demolitions.

Comments are open until 13 Nov 2026

Comment on this application ↗

Site constraints 5

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.
Scheduled monument 31 m away: Oystermouth Castle
Its setting is a consideration for work nearby.
Nationally important archaeology protected by the Secretary of State. Work that affects the monument or its setting is rarely permitted.
SSSI 61 m away: Oystermouth Old Quarry
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
2 listed buildings within 150 m.
Not affected
Outside flood zones 2 and 3

Checked on 20 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 £525,000 in February 2023. Semi-detached house, freehold.

24 February 2023£525,000

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

Building

Floor area113 m² (1,216 sq ft)
Energy ratingD (58 out of 100), could reach C
PropertySemi-detached house, 6 habitable rooms
Built1900 to 1929
HeatingBoiler and radiators, mains gas
WallsCavity wall, filled cavity

From the energy performance certificate lodged in August 2022, the latest held for this property. The building may have changed since. View the certificate

Work with planning data?

Every application in Swansea - and every UK council - as a live feed, an API, or a bulk CSV export.

About Plota's data service

Important details

Council
Swansea
Application type
Full Plans
Postcode
SA3 4BA
Received
19 Oct 2026
Validated
19 Oct 2026
Ward
Mumbles - Area 2
Parish
Mumbles Community Council
Case officer
Show
Target decision
14 Dec 2026
Applicant
Show
Agent
Atrium Architecture Ltd

Decision outlook

Day 9 of the 56-day target. Swansea usually decides demolitions by day 50.

Day 947 days to the 56-day target
76%decided within 8 weeks
83%approved
79decided in the last year

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

Public comments

No public comments yet.

1 neighbour consulted · Last counted 27 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15304260
Planning Portal ref
PP-15304260
Neighbours
22 Oct 2026
Consultation
22 Oct 2026
Comments by
13 Nov 2026
Site or press notice
23 Oct 2026
Statutory expiry
14 Dec 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.