House extensions in Swansea

Swansea received 256 householder applications in the last 12 months - about 5 a week. Rear extensions and side extensions are the most common. Of the 150 decided so far, 127 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

105 last 90 days
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33 last 30 days
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10 last 14 days

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Showing 50 of 105 applications
2026/1134/FUL 8 Jul 2026 Being Considered

25 Llwyn Mawr Close Sketty Swansea SA2 9HD

First floor side extension

Swansea 8 Jul 2026
2026/1131/FUL 8 Jul 2026 Being Considered

60 Pennard Drive Southgate Swansea SA3 2DN

Two storey rear extension including Juliette balcony to rear bedroom window

Swansea 8 Jul 2026
2026/1122/PRE 6 Jul 2026 Being Considered

The Barn Wernoleu Penclawdd Swansea SA4 3RA

(Pre-application) Rear single storey extension, rear entrance porch extension, rear first floor bay window, fenestration alterations, front privacy lo...

Swansea 6 Jul 2026
2026/1108/FUL 2 Jul 2026 Being Considered

Springfield Llanmadoc Swansea SA3 1BY

Single storey rear extension, wrap around rear/side balcony and solar panels to the rear elevation

Swansea 2 Jul 2026
2026/1093/FUL 1 Jul 2026 Being Considered

17 Hazelmere Road Sketty Swansea SA2 0SN

Single storey rear extension

Full Plans Swansea 1 Jul 2026
2026/1100/S73 1 Jul 2026 Being Considered

Unit 1B Parc Tawe City Centre Swansea SA1 2AS

Change of use from retail (Class A1) to indoor leisure use (Class D2) with addition of new door to front elevation and internal works to construct a m...

Variation of Condition Swansea 1 Jul 2026
2026/1085/FUL 30 Jun 2026 Being Considered

39 Roman Court Blackpill Swansea SA3 5BL

Proposed rear conservatory extension

Full Plans Swansea 30 Jun 2026
2026/1076/LBC 29 Jun 2026 Being Considered

23 St James Gardens Uplands Swansea SA1 6DY

Repair and re-instatement of the roof structure of the existing detached garage (application for Listed Building Consent)

Listed Building Consent Swansea 29 Jun 2026
2026/1083/FUL 29 Jun 2026 Being Considered

66 - 67 The Kingsway City Centre Swansea SA1 5HW

Refurbishment & Change of Use of the upper floors into residential apartments including a roof top extension along with retention of the Ground Floor ...

Full Plans Swansea 29 Jun 2026
2026/1074/FUL 29 Jun 2026 Being Considered

Highfield Farm Cilonen Swansea SA4 3UR

Replacement front porch, external cladding to the front and side elevations, fenestration alterations to the front elevation.

Full Plans Swansea 29 Jun 2026
2026/1055/PLD 24 Jun 2026 Decided

4 Hatfield Court Ravenhill Swansea SA5 5DE

Single storey side/rear extension (application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea 24 Jun 2026
2026/1056/FUL 24 Jun 2026 Being Considered

68 Heol Camlan Birchgrove Swansea SA7 9LL

Ground floor rear lobby and bedroom extension

Full Plans Swansea 24 Jun 2026
2026/1057/FUL 24 Jun 2026 Being Considered

26 Glynderwen Crescent Sketty Swansea SA2 8EH

Rear dormer, removal of sun room and erection of a single storey rear extension, single storey side extension, front hardstandig to provide additional...

Full Plans Swansea 24 Jun 2026
2026/1050/FUL 23 Jun 2026 Being Considered

92 Wern Terrace Port Tennant Swansea SA1 8NT

First floor rear extension and rear roof extension

Full Plans Swansea 23 Jun 2026
2026/1042/FUL 22 Jun 2026 Being Considered

90 Gelli Deg Fforestfach Swansea SA5 4PB

Removal of rear conservatory, erection of a single storey rear extension, and addition of a rear door to the garage

Full Plans Swansea 22 Jun 2026
2026/1045/FUL 22 Jun 2026 Being Considered

128 Frampton Road Gorseinon Swansea SA4 4YG

Ground floor side extension

Full Plans Swansea 22 Jun 2026
2026/1048/FUL 22 Jun 2026 Being Considered

30 Whitestone Road Bishopston Swansea SA3 3DB

Increase in ridge height, two single storey side extensions, side canopy, single storey rear extension with recessed balcony above, side roof extensio...

Full Plans Swansea 22 Jun 2026
2026/1024/PRE 18 Jun 2026 Being Considered

5 Myrtle Terrace Mumbles Swansea SA3 4DT

Pre-application enquiry - Single storey side extension, increase in side boundary wall height and rear roof dormer extension.

Pre App Welsh Government Swansea 18 Jun 2026
2026/1022/FUL 18 Jun 2026 Being Considered

102 Manor Road Manselton Swansea SA5 9PN

First-floor rear extension with flat roof.

Full Plans Swansea 18 Jun 2026
2026/1011/FUL 17 Jun 2026 Being Considered

181 Neath Road Landore Swansea SA1 2JT

Change of use to create an HMO for 4 people with external alterations to elevations

Full Plans Swansea 17 Jun 2026
2026/1012/FUL 17 Jun 2026 Being Considered

25 Picket Mead Road Newton Swansea SA3 4SA

Single storey rear extension, front and rear solar panels, front porch under existing canopy and relocation of ground floor side door

Full Plans Swansea 17 Jun 2026
2026/1014/PRE 17 Jun 2026 Decided

Grove Cottage Llwynybwch Farm Oldwalls Llanrhidian Swansea SA3 1HA

(Pre-application) Front Porch, first floor rear extension, front and rear dormers and rear fenestration alterations

Pre App Welsh Government Swansea 17 Jun 2026
2026/1003/FUL 16 Jun 2026 Being Considered

52 Clydach Road Craig Cefn Parc Swansea SA6 5TA

Two storey side extension with first floor side Juliet balcony, front bay window, and alterations to fenestration including first floor rear Juliet ba...

Full Plans Swansea 16 Jun 2026
2026/0998/FUL 16 Jun 2026 Being Considered

25 Llys Penpant Llangyfelach Swansea SA6 6DA

Single storey side and rear extension

Full Plans Swansea 16 Jun 2026
2026/0990/FUL 15 Jun 2026 Being Considered

54 Langland Bay Road Langland Swansea SA3 4QP

Proposed extended patio area with storage area below, pergola and additional boundary screening.

Full Plans Swansea 15 Jun 2026
2026/0992/FUL 15 Jun 2026 Being Considered

11 Westbourne Place Mumbles Swansea SA3 4DB

Single storey rear extension and rear decked area

Full Plans Swansea 15 Jun 2026
2026/0994/PLD 15 Jun 2026 Being Considered

688 Llangyfelach Road Treboeth Swansea SA5 9EL

Conversion of two dwellings into one (Application for a Certificate of Lawful Development)

Lawful Dev. Cert - Proposed Swansea 15 Jun 2026
2026/0997/FUL 15 Jun 2026 Being Considered

Common Farm Llanrhidian Swansea SA3 1EU

Retention and completion of works to convert garage to be used as a gymnasium and home office/studio as ancillary accommodation to the main dwelling, ...

Full Plans Swansea 15 Jun 2026
2026/0995/FUL 15 Jun 2026 Being Considered

68 Eversley Road Sketty Swansea SA2 9DF

Side return extension

Full Plans Swansea 15 Jun 2026
2026/0987/NMA 11 Jun 2026 Decided

18 Hendrefoilan Close Sketty Swansea SA2 7NF

Two storey front extension, first floor side extension, rear roof extension, front rooflights and alterations - Non Material Amendment to Planning Per...

Non Material Amendment Swansea 11 Jun 2026
2026/0981/PRE 10 Jun 2026 Decided

Sunnyside Rhossili Swansea SA3 1PL

(Pre-application) Re-roofing of main house pitched roof, re-rendering to external walls, and replacement detached garden store building with external ...

Pre App Welsh Government Swansea 10 Jun 2026
2026/0980/FUL 10 Jun 2026 Being Considered

78 Gorseinon Road Penllergaer Swansea SA4 9AB

Demolish the existing single storey rear extension and erection of a two storey rear extension, and erection of a first floor side extension

Full Plans Swansea 10 Jun 2026
2026/0969/FUL 9 Jun 2026 Being Considered

15 Cwmlan Terrace Landore Swansea SA1 2PQ

Proposed first floor rear infill extension.

Full Plans Swansea 9 Jun 2026
2026/0964/FUL 8 Jun 2026 Awaiting decision

3 Clyn Cwm Gwyn Killay Swansea SA2 7AQ

Single storey rear sun room

Full Plans Swansea 8 Jun 2026
2026/0966/PLD 8 Jun 2026 Decided

2 Usk Place Cwmrhydyceirw Swansea SA6 6RE

Rear single storey and two storey extension (application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea 8 Jun 2026
2026/0955/PLD 8 Jun 2026 Being Considered

Clifflands Rhossili Swansea SA3 1PE

Siting of a mobile home within residential curtilage ancillary to the main dwelling house (Application for a Certificate of Proposed Lawfulness)

Lawful Dev. Cert - Proposed Swansea 8 Jun 2026
2026/0954/FUL 5 Jun 2026 Being Considered

25 Broadmead Crescent Bishopston Swansea SA3 3BA

Single storey detached garage

Full Plans Swansea 5 Jun 2026
2026/0952/S73 5 Jun 2026 Being Considered

34 Cae Bryn Avenue Sketty Swansea SA2 9AT

Two storey side/rear extension, part single/ part two storey rear extension and replacement detached garage - Variation of condition 2 (plans) of Plan...

Variation of Condition Swansea 5 Jun 2026
2026/0951/FUL 5 Jun 2026 Being Considered

8 Francis Road Morriston Swansea SA6 7DY

Construction of a raised balcony terrace to the rear elevation of the existing dwelling, including a powder-coated steel support frame, composite deck...

Full Plans Swansea 5 Jun 2026
2026/0950/FUL 4 Jun 2026 Being Considered

43 Norfolk Street Mount Pleasant Swansea SA1 6JQ

Change of Use of 5 Bed HMO (Class C4) to 6 Bed HMO (Class C4) to include fenestration alterations and the addition of a rear roof extension and front ...

Full Plans Swansea 4 Jun 2026
2026/0931/PLD 3 Jun 2026 Decided

15 Clordir Road Pontlliw Swansea SA4 9EY

The main extension will be a single storey hipped roof construction built against the side/south elevation, and the garage door will be infilled with ...

Lawful Dev. Cert - Proposed Swansea 3 Jun 2026
2026/0930/FUL 3 Jun 2026 Being Considered

15 Mayals Avenue Blackpill Swansea SA3 5DE

Single storey side/rear extension and alterations to detached outbuilding

Full Plans Swansea 3 Jun 2026
2026/0942/FUL 3 Jun 2026 Being Considered

Flat 76 Newton Road Mumbles Swansea SA3 4BE

Replacement roof covering with new fascias ,barge boards and rain water goods. Replacement chimneys. Two rear rooflights. Re-location of the front ent...

Full Plans Swansea 3 Jun 2026
2026/0913/PRE 2 Jun 2026 Decided

121 Belgrave Road Gorseinon Swansea SA4 6RE

Pre-application enquiry - Proposed two storey side extension and porch enlargement.

Pre App Welsh Government Swansea 2 Jun 2026
2026/0919/PRE 2 Jun 2026 Decided

69 Lan Coed Winch Wen Swansea SA1 7LR

Pre-application enquiry - Construction of rear single storey extension with pitched roof

Pre App Welsh Government Swansea 2 Jun 2026
2026/0914/FUL 2 Jun 2026 Being Considered

The Chapel 682 Llangyfelach Road Treboeth Swansea SA5 9EN

Retention and completion of change of use of existing chapel to provide residential accommodation including single storey rear extension

Full Plans Swansea 2 Jun 2026
2026/0911/FUL 1 Jun 2026 Being Considered

15 Huntingdon Way Sketty Swansea SA2 9HL

The construction of a raised decking at the rear of the property with 900mm front glass balustrade

Full Plans Swansea 1 Jun 2026
2026/0905/FUL 1 Jun 2026 Being Considered

17 Bath Villas Morriston Swansea SA6 7AN

Convert existing garage into garden room including raising the roof and side/rear extension

Full Plans Swansea 1 Jun 2026
2026/0895/FUL 29 May 2026 Awaiting decision

26 St Peters Road Newton Swansea SA3 4SB

Single storey rear extension

Full Plans Swansea 29 May 2026
2026/0894/PLD 29 May 2026 Decided

96 Westport Avenue Mayals Swansea SA3 5EF

Removal of existing conservatory and erection of a single storey rear extension (application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea 29 May 2026
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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 — taller, larger, 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 with objections) 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.