House extensions in Swansea

Swansea received 661 householder applications in the last 12 months - about 13 a week. Rear extensions and side extensions are the most common. Of the 456 decided so far, 374 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

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Showing 50 of 186 applications
Yesterday Being Considered 2026/1682/PRE

480 Gower Road Killay Swansea SA2 7DZ

(Pre-application) Front porch, single storey rear extension, detached garage and new access and driveway

Pre App Welsh Government Swansea
Yesterday Being Considered 2026/1648/FUL

306 Middle Road Gendros Swansea SA5 8EW

First floor rear extension

Full Plans Swansea
Yesterday Being Considered 2026/1540/FUL

75 Higher Lane Langland Swansea SA3 4PD

Single storey rear extension

Full Plans Swansea
23 Oct 2026 Being Considered 2026/1751/FUL

Drummau Fach Stables Birchgrove Road Birchgrove Swansea SA7 9EJ

Part single part two storey side extension and detached garage

Full Plans Swansea
23 Oct 2026 Being Considered 2026/1718/FUL

25 Heol Yr Eithen Cwmrhydyceirw Swansea SA6 6JP

Single storey rear extension

Full Plans Swansea
22 Oct 2026 Pending 2026/1702/ELD

1 Cambridge Close Langland Swansea SA3 4PF

Single storey rear extension (application for a Certificate of Existing Lawful Development)

Swansea
21 Oct 2026 Being Considered 2026/1674/PLD

1 Three Cliffs Drive Southgate Swansea SA3 2BN

Demolition of rear lean to and construction of rear porch (Application for Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
21 Oct 2026 Being Considered 2026/1737/FUL

496 Pentregethin Road Gendros Swansea SA5 8AG

Construction of an additional storey above the existing single-storey building together with associated external alterations

Full Plans Swansea
20 Oct 2026 Being Considered 2026/1733/FUL

62 St Elmo Avenue St Thomas Swansea SA1 8DP

Proposed ground floor rear extension

Full Plans Swansea
20 Oct 2026 Decided 26 Oct 2026/1723/PRE

Cerrig Glan Llanrhidian Swansea SA3 1ES

(Pre-application) Two storey rear extension

Pre App Welsh Government Swansea
20 Oct 2026 Being Considered 2026/1716/PLD

113 Graiglwyd Road Cockett Swansea SA2 0UZ

Removal of side store and construction of a single storey side extension (application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
20 Oct 2026 Being Considered 2026/1731/PLD

26 Clordir Road Pontlliw Swansea SA4 9EY

Rear dormer extension (application for a Certificate of Proposed Lawful Devellopment)

Lawful Dev. Cert - Proposed Swansea
19 Oct 2026 Being Considered 2026/1730/FUL

43 Mansion Gardens Penllergaer Swansea SA4 9GY

Single storey rear extension.

Full Plans Swansea
19 Oct 2026 Being Considered 2026/1729/FUL

10 Castle Avenue Mumbles Swansea SA3 4BA

Demolition of existing kitchen extension, part demolition of the existing garage & proposed single storey rear / side extensions.

Full Plans Swansea
17 Oct 2026 Being Considered 2026/1719/FUL

41 Mayals Avenue Blackpill Swansea SA3 5DB

Part two storey and part single storey and rear extension

Full Plans Swansea
16 Oct 2026 Being Considered 2026/1670/FUL

7A Murton Lane Newton Swansea SA3 4TR

Proposed single storey garden outbuilding within the curtilage of dwelling under construction.

Full Plans Swansea
16 Oct 2026 Being Considered 2026/1496/FUL

Killay Fawr Farm Gower Road Upper Killay Swansea SA2 7DP

To replace existing road kerbs with dropped kerbs and alterations to footpath

Full Plans Swansea
15 Oct 2026 Being Considered 2026/1724/FUL

Clase Primary School Rheidol Avenue Clase Swansea SA6 7JX

Installation of three freestanding canopy structures

Full Plans Swansea
15 Oct 2026 Being Considered 2026/1720/FUL

6 Llangorse Road Penlan Swansea SA5 7EJ

Construction of hardstanding and reformation of existing front access steps

Full Plans Swansea
15 Oct 2026 Being Considered 2026/1715/LBC

Mission Gallery Gloucester Place Maritime Quarter Swansea SA1 1TY

Replacement rear porch, replace first floor windows, replace kitchen window. Installation of disabled access ramp (application for Listed Building Con...

Listed Building Consent Swansea
15 Oct 2026 Being Considered 2026/1714/FUL

9 Highpool Close Newton Swansea SA3 4TU

Detached granny annexe and detached shed

Full Plans Swansea
15 Oct 2026 Being Considered 2026/1711/PLD

18 Llys Yr Onnen Clydach Swansea SA6 5BL

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

Lawful Dev. Cert - Proposed Swansea
15 Oct 2026 Being Considered 2026/1598/FUL

38 Aberdyberthi Street Hafod Swansea SA1 2NF

Proposed attic conversion with a flat roof dormer on the rear elevation

Full Plans Swansea
14 Oct 2026 Being Considered 2026/1705/PRE

28 Manselfield Road Murton Swansea SA3 3AR

(Pre-application) To convert an existing 1960s church hall into a community centre with a church sanctuary for the congregation, formerly based at the...

Pre App Welsh Government Swansea
14 Oct 2026 Refused 21 Oct 2026/1706/PRE

7 Tudor Way Murton Swansea SA3 3AZ

(Pre-application) Single storey rear extension, side pitched roof in place of existing flat roof, front and rear dormer roof extensions, front and rea...

Pre App Welsh Government Swansea
14 Oct 2026 Being Considered 2026/1701/FUL

4 Glasfryn Close Cockett Swansea SA2 0FP

Change of use of dwelling (Class C3) to care home (Class C2) and construction of link to existing nursing home

Full Plans Swansea
14 Oct 2026 Being Considered 2026/1653/FUL

Morris Arms Llangyfelach Road Treboeth Swansea SA5 9LN

Two storey part single storey side extension to facilitate the change of use of the former public house (Class A3) and 1st floor flat (Class C3) to 5 ...

Full Plans Swansea
14 Oct 2026 Being Considered 2026/1609/FUL

10 Canaston Court Penlan Swansea SA5 7LL

Ground floor rear extension

Full Plans Swansea
14 Oct 2026 Being Considered 2026/1694/FUL

13 Stanley Street Mumbles Swansea SA3 4NE

Removal of the existing rear additions and construction of a part two-storey and part single-storey rear extension with roof lights, the addition of a...

Full Plans Swansea
14 Oct 2026 Being Considered 2026/1675/PLD

Abernant Allt Y Graban Road Pontarddulais Swansea SA4 8DS

Use of detached outbuilding for home working (application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
14 Oct 2026 Being Considered 2026/1666/FUL

7B Murton Lane Newton Swansea SA3 4TR

Proposed single storey garden outbuilding within the curtilage of dwelling under construction

Full Plans Swansea
14 Oct 2026 Being Considered 2026/1460/FUL

79 Southlands Drive West Cross Swansea SA3 5RJ

Two storey side extension and alterations to fenestration

Full Plans Swansea
14 Oct 2026 Awaiting decision 2026/0980/FUL

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
13 Oct 2026 Being Considered 2026/1685/PLD

37 Graigola Road Glais Swansea SA7 9HS

Use of the land for siting a mobile home for use ancillary to the main dwelling (application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
13 Oct 2026 Being Considered 2026/1679/PLD

11 Hatherleigh Drive Newton Swansea SA3 4TP

Addition of a pitched roof with rear and side rooflights to rear conservatory, and alterations to conservatory walls and fenestration. Addition of a r...

Lawful Dev. Cert - Proposed Swansea
12 Oct 2026 Being Considered 2026/1680/FUL

28 Pant Y Dwr Three Crosses Swansea SA4 3PG

Single storey rear extension with new side dormer and extension to existing side dormer

Full Plans Swansea
12 Oct 2026 Being Considered 2026/1635/PLD

66 Brynymor Road Gowerton Swansea SA4 3EZ

Single storey side extension and single storey rear extension (Application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
12 Oct 2026 Being Considered 2026/1650/FUL

84 Pennard Road Pennard Swansea SA3 2AA

Demolition of existing single storey rear wing and construction of a two storey rear extension

Full Plans Swansea
9 Oct 2026 Being Considered 2026/1514/FUL

The Lanches Reynoldston Swansea SA3 1AU

Retention of Existing Agricultural Barn along with an additional extension to the rear of it

Full Plans Swansea
9 Oct 2026 Being Considered 2026/1651/FUL

Elm Villa 112 Pentre Road Pontarddulais Swansea SA4 8DQ

Single storey rear extension and enlarged front porch

Full Plans Swansea
9 Oct 2026 Being Considered 2026/1615/FUL

Y Gelli Caswell Road Caswell Swansea SA3 3BS

Extension of an existing raised decked area, installation of a glass roof veranda, retaining walls and rear bi-fold doors

Full Plans Swansea
8 Oct 2026 Being Considered 2026/1432/FUL

24 Gendros Drive Gendros Swansea SA5 8EP

Front and rear rooflights, single storey rear extension and conversion of garage to ancillary living accommodation with front extension and alteration...

Full Plans Swansea
8 Oct 2026 Being Considered 2026/1663/FUL

14 Castle Street Mumbles Swansea SA3 4BH

Garage conversion to garden room with covered decked area & full height side privacy screen and rear steps.

Full Plans Swansea
8 Oct 2026 Awaiting decision 2026/1645/PLD

27 Sycamore Road West Cross Swansea SA3 5LB

Detached outbuilding (application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
7 Oct 2026 Being Considered 2026/1647/PLD

51 Headland Road Bishopston Swansea SA3 3HD

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

Lawful Dev. Cert - Proposed Swansea
6 Oct 2026 Being Considered 2026/1626/FUL

119 Newton Road Newton Swansea SA3 4SW

Detached garage with side workshop/bathroom extension and first floor home office (amendment to planning permission 2025/2385/FUL granted 10th Februar...

Full Plans Swansea
5 Oct 2026 Being Considered 2026/1627/PLD

73 Mumbles Road West Cross Swansea SA3 5AA

Stationing of a caravan to provide ancillary residential accommodation (application for a Certificate of Proposed Lawful Development)

Lawful Dev. Cert - Proposed Swansea
5 Oct 2026 Being Considered 2026/1465/FUL

Land Part Of Caereithin Farm Caereithin Farm Road Ravenhill Swansea SA5 5GH

Conversion and change of use of existing outbuildings to provide additional residential care accommodation for adults (Class C2 Use), with alterations...

Full Plans Swansea
5 Oct 2026 Being Considered 2026/1464/FUL

Caereithin Farmhouse Caereithin Farm Lane Ravenhill Swansea SA5 5GH

Change of Use of a Dwellinghouse (C3 Use) to a Residential Care Facility for Adults (C2 Use) first floor rear extension, front covered veranda, fenest...

Full Plans Swansea
5 Oct 2026 Being Considered 2026/1634/FUL

8 Bishops Walk Morriston Swansea SA6 6EE

Retention and completion of proposed outbuilding

Full Plans Swansea
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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, 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.