House extensions in Swansea

Swansea received 511 householder applications in the last 12 months - about 10 a week. Rear extensions and side extensions are the most common. Of the 301 decided so far, 253 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

191
|
57
|
26
Get alerts for Swansea

Filter applications

Date receivedLast 90 days
Date receivedLast 90 days
Select one year, or two for a range.
Number of homesAny
StatusAny
Application routeAny
Application type1 selected
KeywordsNone
Match

Matches words or phrases in the application address and description.

Showing 50 of 191 applications
2 days ago Being Considered 2026/1372/FUL

4 Windsor Place Mumbles Swansea SA3 4LG

Front dormer, rear rooflights, and single strorey rear extension

Full Plans Swansea
2 days ago Being Considered 2026/1448/FUL

37 Heol Gerrig Treboeth Swansea SA5 9BP

Two storey rear extension

Full Plans Swansea
8 Sept 2026 Being Considered 2026/1458/FUL

9 Plas Gwernfadog Drive Ynysforgan Swansea SA6 6QZ

Two storey rear extension

Full Plans Swansea
8 Sept 2026 Being Considered 2026/1469/PRE

Woodlands Castle Llanmorlais Swansea SA4 3TL

(Pre-application) Single storey side extension and rear single two storey extension

Pre App Welsh Government Swansea
7 Sept 2026 Being Considered 2026/1370/PLD

19A Clarence Street Sandfields Swansea SA1 3QR

Installation of PV panels and replacement roof covering and rooflights

Lawful Dev. Cert - Proposed Swansea
7 Sept 2026 Being Considered 2026/0866/FUL

42 - 43 Coed Saeson Crescent Sketty Swansea SA2 9DQ

Change of use from retail (Class A1) to four flats (Class C3) with external alterations (amendment to Planning Permission 2013/0953 granted on appeal ...

Full Plans Swansea
7 Sept 2026 Being Considered 2025/2590/FUL

Land To The Rear Of Land Of Former Oak Tree Park Hotel Birchgrove Swansea SA7 9JR

Retention and completion of detached outbuilding and detached dwelling (including two storey side extension, two front dormer windows, velux type wind...

Full Plans Swansea
4 Sept 2026 Being Considered 2026/1457/FUL

85 Higher Lane Langland Swansea SA3 4PD

Single storey side extensions, removal of existing roof structures and addition of a first floor including new roof construction with solar panels, fi...

Full Plans Swansea
4 Sept 2026 Being Considered 2026/1311/FUL

66 Lon Mafon Sketty Swansea SA2 9ER

Roof extension and loft conversion consisting of a raised ridge height, three South facing dormers and one North facing dormer

Full Plans Swansea
4 Sept 2026 Decided 2026/1016/PLD

17 Croftfield Crescent Newton Swansea SA3 4UL

Single storey side extension alterations to fenestration, and external alterations (application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
3 Sept 2026 Being Considered 2026/1451/FUL

46 Swansea Road Pontlliw Swansea SA4 9EE

Single story side extension and attic conversion with a raised roof

Full Plans Swansea
3 Sept 2026 Withdrawn 2026/1425/PLD

18 Moorside Road West Cross Swansea SA3 5EY

Enlargement of existing rear dormer roof extensions with rear Juliet balcony (application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
2 Sept 2026 Being Considered 2026/1440/FUL

Ty Morlun Oystermouth Road Swansea SA1 3UL

Proposed automated roller shutter door to control access into existing residential parking

Full Plans Swansea
2 Sept 2026 Being Considered 2026/1439/PRE

14 Castle Street Mumbles Swansea SA3 4BH

(Pre-application) Garage conversion to garden room with covered decked area & 1.8m high side privacy screen and rear steps.

Pre App Welsh Government Swansea
2 Sept 2026 Awaiting decision 2026/1363/PLD

Ller Fedwen Farm Felindre Swansea SA5 7PX

Rear dormer (application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
2 Sept 2026 Being Considered 2026/1318/PLD

Ysgol Gyfun Gymraeg Bryn Tawe Heol Gwyrosydd Penlan Swansea SA5 7BU

Replacement windows at the eastern and western elevations of the main school building and the replacement of the curtain wall at the western elevation...

Lawful Dev. Cert - Proposed Swansea
2 Sept 2026 Being Considered 2026/1365/PLD

Ysgol Gyfun Gymraeg Bryn Tawe Heol Gwyrosydd Penlan Swansea SA5 7BU

Partial demolition and replacement of existing doors, windows and internal amendments of the sixth form block (Application for a Certificate of Propos...

Lawful Dev. Cert - Proposed Swansea
2 Sept 2026 Being Considered 2026/1357/PLD

Ysgol Gyfun Gymraeg Bryn Tawe Heol Gwyrosydd Penlan Swansea SA5 7BU

Partial demolition and replacement of external cladding, roof, windows, doors and internal amendments of Selwyn's gym (application for a Certificate o...

Lawful Dev. Cert - Proposed Swansea
1 Sept 2026 Being Considered 2026/1412/FUL

8 Orchard Close Port Eynon Swansea SA3 1NZ

Single storey side extension

Full Plans Swansea
1 Sept 2026 Being Considered 2026/1426/FUL

26 Kennington Close Killay Swansea SA2 7EF

Single storey rear extension and extension to rear dormer

Full Plans Swansea
1 Sept 2026 Being Considered 2026/1427/FUL

47 Gors Road Penllergaer Swansea SA4 9BA

Demolition of the rear conservatory, proposed single storey and two storey rear extensions.

Full Plans Swansea
1 Sept 2026 Being Considered 2026/1422/FUL

The Cottage 266A Derwen Fawr Road Sketty Swansea SA2 8EJ

Two storey extension to the Western and Southern elevations replacing the existing single storey side and front extensions

Full Plans Swansea
28 Aug 2026 Being Considered 2026/1364/NMA

21 Bryn Road Loughor Swansea SA4 6PG

Detached dwelling (Non Material amendment to planning permission 2019/2695/FUL granted 27th February 2020) for alterations to the elevations by adding...

Non Material Amendment Swansea
28 Aug 2026 Being Considered 2026/1356/FUL

24 Langland Court Road Langland Swansea SA3 4TB

Two storey side extension with new under croft garden room under external paved area

Full Plans Swansea
28 Aug 2026 Being Considered 2026/1416/FUL

36 Woodville Road Mumbles Swansea SA3 4AD

Rear dormer extension, front roof lights, and alterations to single storey rear extension roof and fenestration (previously approved).

Full Plans Swansea
28 Aug 2026 Decided 2026/1114/FUL

Sunnyside Rhossili Swansea SA3 1PL

Re-roofing of the main house including the addition of a flue, re-rendering to external walls, and replacement detached garden store building with ext...

Full Plans Swansea
27 Aug 2026 Being Considered 2026/1409/FUL

6A Heol Ysgyfarnog Birchgrove Swansea SA7 9NH

Single storey rear extension

Full Plans Swansea
26 Aug 2026 Being Considered 2026/1395/PLD

152 Pennard Drive Southgate Swansea SA3 2DR

Single storey rear extension & ground floor side window (Application for a certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
26 Aug 2026 Being Considered 2026/0572/FUL

20 Borough Road Loughor Swansea SA4 6RP

Vehicle crossing at front of property

Full Plans Swansea
26 Aug 2026 Being Considered 2026/1243/PRE

Brynfield Court Langland Swansea SA3 4TF

Pre-application enquiry - The structural repair of the external walls and balconies, including the balcony balustrade and panel replacement

Pre App Welsh Government Swansea
26 Aug 2026 Being Considered 2026/1312/FUL

St Madoc Llanmadoc Swansea SA3 1DE

Detached garage with first floor storage and associated access

Full Plans Swansea
26 Aug 2026 Awaiting decision 2026/1383/NMA

Townhill Community Primary School Townhill Road Townhill Swansea SA1 6PT

Demolition of the existing kitchen/dining hall block and construction of a new detached dining hall block with associated kitchen and storage/welfare ...

Non Material Amendment Swansea
25 Aug 2026 Being Considered 2026/1384/PRE

69 Tyn Y Bonau Road Pontarddulais Swansea SA4 8RY

Pre-application enquiry - Construction of rear first floor extension

Pre App Welsh Government Swansea
25 Aug 2026 Being Considered 2026/1389/FUL

18 Moorside Road West Cross Swansea SA3 5EY

Enlargement of existing front dormer and rear roof extension

Full Plans Swansea
24 Aug 2026 Being Considered 2026/1380/FUL

34 Long Shepherds Drive Caswell Swansea SA3 4RP

Alterations to means of enclosure

Full Plans Swansea
24 Aug 2026 Being Considered 2026/1381/FUL

9 William Dennis Avenue Loughor Swansea SA4 6PD

First floor extension over existing garage and ground floor utility room extension to rear

Full Plans Swansea
24 Aug 2026 Being Considered 2026/1323/PRE

4 Station Terrace Penclawdd Swansea SA4 3XX

(Pre-application) Chimney re-crown and repointing, lead flashing and soakers. Roof replacement of main building and single story extension using new f...

Pre App Welsh Government Swansea
21 Aug 2026 Awaiting decision 2026/0916/PLD

30 Station Road Grovesend Swansea SA4 4GY

Single storey rear extension (appliction for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
20 Aug 2026 Decided 2026/1360/PRE

27 Gabalfa Road Sketty Swansea SA2 8NE

PRE APP - Extension and conversion of existing garage to annex for carer of occupant

Pre App Welsh Government Swansea
20 Aug 2026 Being Considered 2026/1253/FUL

Brynfield Manor 42 Brynfield Road Langland Swansea SA3 4SX

Retention and completion of rear two-storey extension

Full Plans Swansea
20 Aug 2026 Being Considered 2026/1374/FUL

79 Frederick Place Llansamlet Swansea SA7 9SX

Formation of a permeable driveway to the front of the property and extension to the existing outbuilding/workshop to form a garage for storage.

Full Plans Swansea
19 Aug 2026 Refused 2026/1324/NMA

15 The Paddock West Cross Swansea SA3 5AH

Two storey extension to the rear of the existing house - Non Material Amendment to planning permission 2025/0991/FUL granted 3rd October 2025 to allow...

Non Material Amendment Swansea
19 Aug 2026 Being Considered 2025/2567/FUL

67 Hendrefoilan Road Sketty Swansea SA2 9LU

Replacement dwelling

Full Plans Swansea
18 Aug 2026 Being Considered 2026/1358/LBC

Singleton Abbey Singleton Park Swansea SA2 8PW

Removal of modern internal partitions to provide an open-plan office space. In addition, restore a historic window opening to the internal corridor to...

Listed Building Consent Swansea
18 Aug 2026 Being Considered 2026/1361/FUL

Orchard House 15 Melcorn Drive Newton Swansea SA3 4UN

Proposed detached garage with office/storage at first floor level, garage to ajoin existing detached store/plant room

Full Plans Swansea
18 Aug 2026 Being Considered 2026/1342/FUL

107 Frampton Road Gorseinon Swansea SA4 4YE

Ground floor rear extension

Full Plans Swansea
18 Aug 2026 Being Considered 2026/1353/FUL

113 Goetre Fawr Road Killay Swansea SA2 7QT

Two storey side, single storey rear and detached garage.

Full Plans Swansea
18 Aug 2026 Awaiting decision 2026/1359/PLD

331 Clasemont Road Morriston Swansea SA6 6BU

Rear dormer, front rooflights and internal alterations (application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
17 Aug 2026 Being Considered 2026/1326/FUL

15,17,19, 21 And 23 Heol Myddfai Felindre Swansea SA5 7ND

Extension to roof gables, replacement roof coverings, roof mounted solar panels, external wall insulation, replacement doors and windows, detached pla...

Full Plans Swansea
17 Aug 2026 Being Considered 2026/1345/FUL

21 Bryn Road Loughor Swansea SA4 6PG

Retention of detached single-storey outbuilding to the rear garden, for use as a store and workshop incidental to the dwellinghouse approved under 201...

Full Plans Swansea
Recency
Last 2 weeks
2-4 weeks
1-2 months
Older

Get free email alerts for new extensions applications in Swansea

Set up alerts

Frequently asked questions

When do you need planning permission for a house extension?
Single-storey rear extensions up to 4m (detached) or 3m (semi-detached / terraced) are usually permitted development. Two-storey extensions, anything in a conservation area, or larger projects almost always need a planning application.
What's the difference between planning permission and permitted development?
Permitted development rights let you build certain things without applying for planning permission, subject to specified limits. Anything outside those limits, whether taller, larger or in a protected area, needs full planning permission.
How long does a householder application take?
The statutory target is 8 weeks from validation. Most simple householder extensions are decided within that window; complex or contested cases, especially those drawing a lot of comments, can take longer.
Can I get email alerts for new extensions applications in Swansea?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Swansea. You can also narrow the alert to a postcode, street, or drawn area.

We check Swansea's planning portal daily. New extensions applications appear here within a day of being published.