House extensions in Glamorgan

Glamorgan received 445 householder applications in the last 12 months - about 9 a week. Rear extensions and garage works are the most common. Of the 334 decided so far, 306 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 123 applications
22 Oct 2026 Awaiting Determination (no consults) 2026/00757/LBC

Pen Y Bryn, Pen-y-lan Road, Aberthin

Reinstate front porch and alterations to windows in the new extension, including dormer windows and roof lights.

Listed Building Consent application Glamorgan
19 Oct 2026 Awaiting Consultation Responses 2026/00767/FUL

64 Penlan Road, Llandough, Penarth

Hip to gable loft conversion with 2no. dormers to the front elevation, additional window to side. Alterations to fenestration. Ground floor rear exten...

Full Planning Application Glamorgan
19 Oct 2026 Awaiting Consultation Responses 2026/00744/FUL

24 Vale View Crescent, Llandough, Penarth

Retrospective application for erecting a deck and shed in the back garden of a domestic property

Full Planning Application Glamorgan
15 Oct 2026 Awaiting Consultation Responses 2026/00777/FUL

61 Phyllis Street Barry

Proposed single storey rear extension & loft conversion, including demolition of existing rear extension

Full Planning Application Glamorgan
15 Oct 2026 Awaiting Consultation Responses 2026/00760/FUL

The Tower House, 70 Victoria Road, Penarth

External upgrades to replace and upgrade existing windows and external doors, Fascia, soffits and guttering

Full Planning Application Glamorgan
15 Oct 2026 Awaiting Determination (no consults) 2026/00761/LAW

Mews Cottage, Heol-y-cawl, Dinas Powys

Enclosure of the front of the existing integral carport, to form an enclosed entrance area. The enclosed area will form part of the house.

Lawful Use or Development application Glamorgan
14 Oct 2026 Awaiting Consultation Responses 2026/00740/FUL

Northcliff Rise, Moulton

A new detached double garage and annex. A new detached orangery with adjacent outdoor swimming pool. Installation of Solar Panels and Heat pump.

Full Planning Application Glamorgan
14 Oct 2026 Awaiting Consultation Responses 2026/00717/FUL

Scouts Association, 9 Highwalls Road, Dinas Powys

Open Sided Canopy Extention to Scout Hall

Full Planning Application Glamorgan
14 Oct 2026 Awaiting Consultation Responses 2026/00508/FUL

26 The Parade, Barry

Installation of roof windows

Full Planning Application Glamorgan
14 Oct 2026 Awaiting Consultation Responses 2026/00507/FUL

2 The Parade, Barry

Installation of roof windows

Full Planning Application Glamorgan
14 Oct 2026 Awaiting Consultation Responses 2026/00058/FUL

Penyrheol, Treoes

2 storey rear extension to comprise living room to ground floor and bedroom. En suite to first floor, erection of new garage and vehicular access

Full Planning Application Glamorgan
13 Oct 2026 Awaiting Consultation Responses 2026/00770/FUL

Y Felin Fach, Monknash

Proposed detached garage

Full Planning Application Glamorgan
13 Oct 2026 Awaiting Consultation Responses 2026/00769/FUL

56 Shakespeare Avenue, Penarth

Proposed single storey rear extension. Proposed 2 storey side extension. Proposed front porch and internal alterations.

Full Planning Application Glamorgan
13 Oct 2026 Awaiting Consultation Responses 2026/00766/FUL

Trengale, Piccadilly, Llanblethian, Cowbridge

Existing side PVC conservatory to be demolished and replaced with a solid wall and pitched roof extension. New external door and small window to oppos...

Full Planning Application Glamorgan
13 Oct 2026 Awaiting Consultation Responses 2026/00419/FUL

59 Tydfil Street, Barry

Remove existing main terracotta clay tiled roof and replace with slate tiles. Replace patio doors in lounge with wider sliding doors. Cover entire exi...

Full Planning Application Glamorgan
13 Oct 2026 Awaiting Consultation Responses 2026/00729/FUL

Little West Apartments, 9 & 10 B4524 Southerndown To Main Road, Southerndown

Amalgamation of 2 apartments into a single dwelling. Also including a minor alteration to the rear elevation to slightly extend the footprint of the e...

Full Planning Application Glamorgan
12 Oct 2026 Awaiting Consultation Responses 2026/00752/FUL

2 Cwrt-y-vil Road, Penarth

Installation of uPVC heritage replacement white woodgrain sash windows to all existing openings on the front, side and rear elevations. Velux conserva...

Full Planning Application Glamorgan
12 Oct 2026 Awaiting Consultation Responses 2026/00750/FUL

40 Marine Drive, Barry

Single storey, pitched roof, rear infill extension. All finishes to match existing

Full Planning Application Glamorgan
12 Oct 2026 Awaiting Determination (no consults) 2026/00730/LAW

23 Heol Y Pentir, Rhoose

Proposed single storey rear extension and new roof over existing conservatory

Lawful Use or Development application Glamorgan
9 Oct 2026 Awaiting Consultation Responses 2026/00763/FUL

31 Colcot Road, Barry

Proposed rear dormer loft conversion extension with hip to gable and existing detached garage converted to garden room, gym, shower room and storage t...

Full Planning Application Glamorgan
9 Oct 2026 Approved 12 Oct 2026/00622/LAW

17 Lavernock Road, Penarth

New single storey extension and dormer loft conversion both to the rear

Lawful Use or Development application Glamorgan
7 Oct 2026 Awaiting Consultation Responses 2026/00755/FUL

Three Elms, Church Road, Llanblethian, Cowbridge

Alterations to Approved Detached Garage

Full Planning Application Glamorgan
7 Oct 2026 Awaiting Consultation Responses 2026/00737/FUL

11 Windsor Terrace, Penarth

Replacement of roof tiles and roof windows and additional roof insulation

Full Planning Application Glamorgan
6 Oct 2026 Awaiting Consultation Responses 2026/00753/FUL

21 Trem Y Bae, Penarth

Proposed enclosure of the existing covered entrance area to the front. Opening up of northeast facing terrace wall and insertion of a new frameless gl...

Full Planning Application Glamorgan
6 Oct 2026 Awaiting Consultation Responses 2026/00754/FUL

59 Geraint's Way, Cowbridge

Single Storey Rear Extension, Rear Dormer Extension, Extension of existing Front Dormer, together with adaptation of existing garage to form workshop ...

Full Planning Application Glamorgan
6 Oct 2026 Awaiting Consultation Responses 2026/00751/FUL

2 Maes-y-ffynon, Bonvilston

Demolition of existing boiler room/log store annex, and the erection of a new single storey side extension.

Full Planning Application Glamorgan
6 Oct 2026 Awaiting Consultation Responses 2026/00631/FUL

33 Eastgate, Cowbridge

Demolish the existing rear Garage, build new unit in the same position with additional area for home office.

Full Planning Application Glamorgan
6 Oct 2026 Awaiting Consultation Responses 2026/00514/FUL

Dyllwyn, Morfa Lane, Wenvoe

Erection of a self-contained 2-bedroom dwelling

Full Planning Application Glamorgan
5 Oct 2026 Awaiting Consultation Responses 2026/00747/FUL

Llanwensan Fach, Peterston Road, Groesfaen

A new shed to the side of the house (northeast) for a golf simulator.

Full Planning Application Glamorgan
5 Oct 2026 Awaiting Consultation Responses 2026/00707/FUL

58 John Batchelor Way, Penarth

Proposed powder coated steel & glass balcony at first floor level, adjacent to front door (to match that at number 27)

Full Planning Application Glamorgan
5 Oct 2026 Awaiting Consultation Responses 2026/00651/FUL

1 Fairfield Road, Penarth

Extension of existing pavement crossover to front of property

Full Planning Application Glamorgan
2 Oct 2026 Awaiting Consultation Responses 2026/00746/FUL

26 Tordoff Way, Barry

Proposed timber decking and handrails to front elevation of existing domestic dwellinghouse

Full Planning Application Glamorgan
2 Oct 2026 Awaiting Consultation Responses 2026/00723/FUL

2 Salop Street, Penarth

Erection of a ground floor rear/side extension

Full Planning Application Glamorgan
2 Oct 2026 Awaiting Consultation Responses 2026/00704/FUL

3 Wessex Place, Barry

Single storey rear extension and first floor rear dormer extension

Full Planning Application Glamorgan
1 Oct 2026 Awaiting Consultation Responses 2026/00708/FUL

38 Caradoc Avenue, Barry

Single storey extension to the front and side elevation

Full Planning Application Glamorgan
30 Sept 2026 Awaiting Determination (no consults) 2026/00702/LAW

147 Lavernock Road, Penarth

Proposed single storey rear extension

Lawful Use or Development application Glamorgan
29 Sept 2026 Approved 30 Sep 2026/00381/LAW

74 Murch Road, Dinas Powys

Proposed Rooflights and PV panels

Lawful Use or Development application Glamorgan
28 Sept 2026 Awaiting Consultation Responses 2026/00734/FUL

3 Petrel Close, Penarth

Proposed entrance porch

Full Planning Application Glamorgan
28 Sept 2026 Awaiting Consultation Responses 2026/00731/FUL

13 Wood Street, Penarth

Rebuilding our old brick garage and convert it to a garden summer room

Full Planning Application Glamorgan
25 Sept 2026 Awaiting Consultation Responses 2026/00685/FUL

162 Redlands Road, Penarth

Installation of driveway, excavations to form an even slope. Driveway to be surfaced with permeable resin, overlaying permeable tarmac with hardcore l...

Full Planning Application Glamorgan
24 Sept 2026 Awaiting Consultation Responses 2026/00726/FUL

The Cottage, 79 Cog Road, Sully

The proposed demolition and the rebuild of a garden room.

Full Planning Application Glamorgan
24 Sept 2026 Awaiting Consultation Responses 2026/00724/FUL

Ty Gan Y Mor, Craig Yr Eos Avenue, Ogmore By Sea

Proposed Single Storey Garden Room

Full Planning Application Glamorgan
24 Sept 2026 Awaiting Consultation Responses 2026/00727/FUL

24 Forrest Road, Penarth

A rear extension on the first floor of the house to provide an additional bedroom with en-suite.

Full Planning Application Glamorgan
24 Sept 2026 Awaiting Consultation Responses 2026/00725/FUL

2 Laburnum Way, Penarth

Single storey side extension to create utility and WC with new vehicle access and dropped kerb

Full Planning Application Glamorgan
23 Sept 2026 Awaiting Consultation Responses 2026/00719/FUL

34 Clos Y Rheilffordd, Barry

Proposed garage conversion, with window to replace garage door, to existing domestic dwellinghouse

Full Planning Application Glamorgan
23 Sept 2026 Awaiting Consultation Responses 2026/00722/FUL

14 Ger Y Llan, St Nicholas

Wrap-around extension: rear single-storey, side two-storey.

Full Planning Application Glamorgan
22 Sept 2026 Awaiting Consultation Responses 2026/00280/FUL

Tudor Bungalow, Cowbridge Road, Ystradowen

Demolition of bungalow and detached garage and development of replacement dwelling and detached garage, landscaping, boundary treatments and associate...

Full Planning Application Glamorgan
21 Sept 2026 Awaiting Consultation Responses 2026/00666/FUL

3 Badgers Brook Close, Ystradowen

Single-storey rear extension to provide additional ground-floor living accommodation.

Full Planning Application Glamorgan
21 Sept 2026 Awaiting Consultation Responses 2026/00678/FUL

146 Redlands Road, Penarth

To install a permeable resin bound surface driveway for off road parking, install electric point with car charging and installation of outside tap.

Full Planning Application Glamorgan
21 Sept 2026 Approved 29 Sep 2026/00455/FUL

27 Countess Place, Penarth

Proposed rear outbuilding

Full Planning Application Glamorgan
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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 Glamorgan?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Glamorgan. You can also narrow the alert to a postcode, street, or drawn area.

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