House Extension planning applications in Wales

Search house extension, loft conversion, and dormer applications by postcode, town, street, address, council, or planning reference.

Covers householder extension applications — single-storey rear and two-storey side extensions, loft conversions and dormers, wraparound extensions, porches, garage conversions, outbuildings and garden rooms, orangeries and conservatories.

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Showing 50 of 1,955 applications
C26/0474/39/DT Yesterday Pending

CRAIG Y DON Lôn Golff, Abersoch, Pwllheli, Gwynedd, LL53 7EF

Cais cynllunio ôl-weithredol ar gyfer dymchwel garej bresennol ac adeiladu garej newydd o fewn cwrtil y tŷ annedd er mwyn darparu lle storio atodol. R...

Householder Planning Gwynedd
A260476 Yesterday Pending

15 Victoria Street, Aberaeron, Ceredigion, SA46 0DA

Proposed Extension and Alterations to Dwelling

Householder Planning Ceredigion
A260477 Yesterday Pending

15 Victoria Street, Aberaeron, Ceredigion, SA46 0DA

Proposed Extension and Alterations to Dwelling

Listed Building Consent Ceredigion
FUL/000699/26 2 days ago Application allocated to Case Officer

85, Pen Y Maes Road, Holywell, CH8 7EG

Demolition of side porch extension - Proposed Single storey side extension - Disabled adaption

Full - Building Works Flintshire
FUL/000695/26 2 days ago Application allocated to Case Officer

45 , Howard Street, Connahs Quay, CH5 4QQ

Single-storey flat roof rear extension to provide a living room and internal alterations to form a fully accessible shower room, existing living room ...

Full - Building Works Flintshire
AGN/000684/26 2 days ago Application allocated to Case Officer

Land off Ffordd Pennant, Maes Pennant, Holywell, CH8 9PJ

STEEL FRAME AND CLAD STORAGE SHED

Prior Approval Agriculture Flintshire
A260473 2 days ago Pending

TYNCELYN VILLA, Blaenpennal, Aberystwyth, Ceredigion, SY23 4TL

Proposed extension to dwelling along with demolition of existing side porch.

Householder Planning Ceredigion
NP/26/0353/FUL 2 days ago Pending

17, Trewarren Road, St Ishmaels, Haverfordwest, Pembrokeshire, SA62 3SZ

Retrospective - Removal of existing side boundary wall to create driveway

Full Pembroke Coast
2026/1374/FUL 20 Aug 2026 Being Considered

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 20 Aug 2026
P/26/0880/LBC 20 Aug 2026 Under Consultation

MIN Y NANT, LLAWR-Y-GLYN, CAERSWS, SY17 5RH

Installation of a stairlift together with shower room adaptations

Listed Building Consent Powys 20 Aug 2026
C26/0467/11/LL 20 Aug 2026 Pending

Unit C Bryn Llwyd Works. , Bangor, LL57 4SP

Newid defnydd uned o ddefnydd B1 i D2 gan gynnwys estyniad newydd. Change of use of exisiting unit from B1 to D2 including new extension

Full Planning Gwynedd 20 Aug 2026
C26/0476/19/DT 20 Aug 2026 Pending

21 Dôl Beuno, Bontnewydd, Caernarfon, Gwynedd, LL55 2UE

Dymchwel adeilad allanol a chodi estyniad deulawr cefn Demolish outbuilding and construct a two storey rear extension

Householder Planning Gwynedd 20 Aug 2026
A260467 20 Aug 2026 Pending

PENLANSAITH, Tresaith, Cardigan, Ceredigion, SA43 2JH

Renovations and extension to existing dwelling

Householder Planning Ceredigion 20 Aug 2026
P/2026/0171 20 Aug 2026 Pending

DOLANOG Rhyd Clydach, Brynmawr, Ebbw Vale, Blaenau Gwent, NP23 4SJ

Proposed two storey extension at rear of dwelling and dormer to main roof at front and rear

Householder Application Blaenau Gwent 20 Aug 2026
P/26/0138 20 Aug 2026 Unknown

Ffostyll 18 The Hawthorns Pant Merthyr Tydfil CF48 2EJ

Demolish existing conservatory and construct a single storey rear extensions

Full Merthyr Tydfil 20 Aug 2026
26/01761/FUL 19 Aug 2026 Pending

Castell Coch Farm Mill Road Tongwynlais Cardiff CF15 7JQ

Proposed subdivision of existing dwelling to create two self-contained dwellings; with associated internal reconfiguration, garage extension and alter...

Full Planning Permission Cardiff 19 Aug 2026
26/01768/HSE 19 Aug 2026 Pending

131 Maindy Road Cathays Cardiff CF24 4HN

Proposed erection of a detached single-storey garage in the rear garden

Householder Planning Permission Cardiff 19 Aug 2026
2026/00587/LBC 19 Aug 2026 Pending

58 High Street, Cowbridge

Replacement of roof structure and cover, excavation and installation of timecrete floor to increase floor level and wall insulation to rear annexe and...

Glamorgan 19 Aug 2026
26/01763/HSE 19 Aug 2026 Pending

7 Welby Road Canton Cardiff CF5 1PA

GROUND FLOOR REAR/SIDE EXTENSION AND REAR DORMER LOFT CONVERSION

Householder Planning Permission Cardiff 19 Aug 2026
2026/00612/FUL 19 Aug 2026 Pending

5 Meadow View Court, Sully

Proposed part first floor front and side extensions and external alterations

Glamorgan 19 Aug 2026
2026/00605/FUL 19 Aug 2026 Pending

20 Knowbury Avenue, Penarth

New front porch with balcony over, new rear dormer to first floor, internal remodelling. All finishes to match existing

Glamorgan 19 Aug 2026
2026/00463/LAW 19 Aug 2026 Pending

1 St Davids Avenue, Dinas Powys

Demolition of existing garage and garden wall. Erection of single storey side elevation mono-pitch extension

Glamorgan 19 Aug 2026
P/26/436/FUL 19 Aug 2026 -

32A & B Picton Avenue, Porthcawl, CF36 3AJ

Part two storey and part single storey rear extension

Bridgend 19 Aug 2026
P/26/434/FUL 19 Aug 2026 -

181 West Road, Nottage, Porthcawl, CF36 3RT

Increase in ridge height to allow first floor accommodation with front and rear gables with Juliette balcony to front elevation, front porch and singl...

Bridgend 19 Aug 2026
0/53604 19 Aug 2026 REGISTERED

Pennant Hall Ffordd Pennant Eglwysbach LL28 5UN

The proposal is to alter in minor respects the main staircase design in order (i) principally to facilitate increasing the door head height from the e...

Listed Building Consent Conwy 19 Aug 2026
2026/00611/FUL 19 Aug 2026 Pending

57 Buttrills Road, Barry

Construction of a granny flat to replace existing garage

Glamorgan 19 Aug 2026
2026/00610/LAW 19 Aug 2026 Pending

32 Dunraven Close, Cowbridge

A single-storey flat-roof extension to the rear of a lawful dwellinghouse

Glamorgan 19 Aug 2026
2026/00477/LAW 19 Aug 2026 Pending

Highways, 59 Broadway, Llanblethian, Cowbridge

Demolition of existing garage & rear conservatory and construction of single storey wrap around extension

Glamorgan 19 Aug 2026
2026/00586/FUL 19 Aug 2026 Pending

29 Clevedon Avenue, Sully

Convert existing garage into Annexe to create independent living for a disable family member. Replace exising log cabin with triple garage.

Glamorgan 19 Aug 2026
P/26/432/FUL 19 Aug 2026 -

10 School Road, Kenfig Hill, Bridgend, CF33 6DT

Single storey rear extension

Bridgend 19 Aug 2026
C26/0297/26/AC 19 Aug 2026 Pending

TAN Y BRYN, Waunfawr, Caernarfon, Gwynedd, LL55 4BZ

Cais i ddiwygio amod 2 o ganiatâd cynllunio C18/0856/26/LL ar gyfer gwaith adnewyddu ar y bwthyn presennol gan gynnwys gwaith dymchwel waliau, newidia...

Removal/Variation of Condition(s) Gwynedd 19 Aug 2026
C26/0334/23/DT 19 Aug 2026 Pending

17 Glan Moelyn, Llanrug, Caernarfon, Gwynedd, LL55 4PG

Codi estyniad llawr cyntaf dros gegin/ystafell fwyta bresennol Erection of a first floor extension over existing kitchen/dining

Householder Planning Gwynedd 19 Aug 2026
C26/0482/26/DT 19 Aug 2026 Pending

Hendy, GWASTAD FAES, Waunfawr, Caernarfon, Gwynedd, LL55 4AX

Estyniad i ochr yr eiddo. Extension to the side of the property.

Householder Planning Gwynedd 19 Aug 2026
C26/0498/03/DT 19 Aug 2026 Pending

12 Tyddyn Gwyn, Manod, Blaenau Ffestiniog, Gwynedd, LL41 4AN

Application for a two storey extension / Cais am estyniad cefn dau lawr

Householder Planning Gwynedd 19 Aug 2026
20/2026/0349/HH 19 Aug 2026 Pending

THE COACH HOUSE, Pentre Coch, Ruthin, Denbighshire, LL15 2YF

Codi estyniad ystafell ardd yn y cefn a gosod ffenestri Newydd (ail-gyflwyniad) / Erection of a garden room extension to rear and installation of repl...

Householder Application Denbighshire 19 Aug 2026
20/2026/0350/LBC 19 Aug 2026 Pending

THE COACH HOUSE, Pentre Coch, Ruthin, Denbighshire, LL15 2YF

Codi estyniad ystafell ardd yn y cefn a gosod ffenestri Newydd (ail-gyflwyniad cais Adeilad Rhestredig) / Erection of a garden room extension to rear ...

Listed Building Consent Denbighshire 19 Aug 2026
17/2026/0251/HH 19 Aug 2026 Pending

1 Plas Teg, Llandegla, Wrexham, Denbighshire, LL11 3AQ

Codi estyniad ystafell wydr i'r annedd / Erection of a conservatory extension to dwelling

Householder Application Denbighshire 19 Aug 2026
A260459 19 Aug 2026 Pending

BRYN Y GRAIG Bryn-y-mor Road, Aberystwyth, Ceredigion, SY23 2HX

Proposed alterations at Bryn y Graig, remove lean-to roofs, convert outbuildings in to habitable spaces and cover with well insulated flat, green roof...

Householder Planning Ceredigion 19 Aug 2026
A260464 19 Aug 2026 Pending

NODDFA, 2 Belle Vue Terrace, Aberaeron, Ceredigion, SA46 0BB

Proposed domestic garage to include removal of outhouse and rear boundary wall

Approval of Details Reserved by Condition Ceredigion 19 Aug 2026
2026/00511/FUL 19 Aug 2026 Pending

8, 9 and 10 St Joseph's Mews, Penarth

Reroofing requiring increase in roof height of approx 50mm

Glamorgan 19 Aug 2026
26/P/0380/HH 18 Aug 2026 Pending

4 Bedford Close Greenmeadow Cwmbran Torfaen NP44 5HN

Storm porch to front of property

Householder Torfaen 18 Aug 2026
2026/1361/FUL 18 Aug 2026 Being Considered

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
DM/2026/01020 18 Aug 2026 Pending Consideration

Jubilee Cottage Penrhos Farm To Beiliau Wood Penrhos Monmouthshire NP15 2LF

Proposed single storey side extension and first floor extension over existing side extension

Householder Monmouthshire 18 Aug 2026
26/P/0379/FUL 18 Aug 2026 Pending

Flat 1 High Street Pontypool Torfaen NP4 6EY

Replacement of flat roof with new mono pitched lightweight metal roof

Full Application Torfaen 18 Aug 2026
26/01753/HSE 18 Aug 2026 Pending

31 Crofts Street Roath Cardiff CF24 3DZ

PROPOSED CONVERSION OF EXISTING DETATCHED GARAGE. PROPOSED INCREASE IN HEIGHT OF RIDGE AND EAVES.

Householder Planning Permission Cardiff 18 Aug 2026
26/01755/HSE 18 Aug 2026 Pending

70 Heol Nant Glandulas Lisvane Cardiff CF14 0AB

Rear conservatory extension.

Householder Planning Permission Cardiff 18 Aug 2026
P/2026/0540 18 Aug 2026 Ymgynghori ar hyn o bryd / Under Consultation

AELWYD, HILL STREET, RHOSLLANERCHRUGOG, WREXHAM, LL14 1LW

SINGLE STOREY FRONT EXTENSION

Caniatâd cynllunio perchennog tŷ / Householder planning permission Wrexham 18 Aug 2026
0/53600 18 Aug 2026 REGISTERED

Bryn Euryn Cottage 78 & 80 Tan Y Bryn Road Rhos On Sea LL28 4TU

Proposed conversion of 2 no dwellings into 1no dwelling

Full Conwy 18 Aug 2026
2026/1353/FUL 18 Aug 2026 Being Considered

113 Goetre Fawr Road Killay Swansea SA2 7QT

Two storey side, single storey rear and detached garage.

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

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 18 Aug 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 extensions planning applications anywhere in Wales?
Yes. Click the "Set up alerts" button on this page and you'll get a daily (or weekly) email listing every new extensions application submitted anywhere in Wales. No need to pick a postcode or draw a map - pick the category once, choose your frequency, and we'll do the rest.

Extensions planning applications elsewhere

Data updated daily across Wales's active councils.