House extensions in Flintshire

Flintshire received 146 householder applications in the last 12 months - about 3 a week. Garage works and rear extensions are the most common. Of the 65 decided so far, 61 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

101 last 90 days
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35 last 30 days
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16 last 14 days

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Showing 50 of 101 applications
FUL/000549/26 2 days ago Pending

74, Llys Curig, Oakenholt, Flint, CH6 5FW

Landscaping garden to create a lower level to allow privacy and space for a summ

Full - Building Works Flintshire
FUL/000587/26 9 Jul 2026 Pending

16, Green Park, Connahs Quay, Deeside, CH5 4QJ

Single-storey flat roof extension and internal alterations to provide an increas

Full - Building Works Flintshire 9 Jul 2026
LBC/000595/26 9 Jul 2026 Pending

PEN Y CEFN FARM, Rhydymwyn, Mold, CH7 5HP

Structural timber renovation and repairs to the ground and first floors.

Listed Building Extensions and Alterations Flintshire 9 Jul 2026
FUL/000597/26 9 Jul 2026 Pending

LLYS Y BRENIN, Holywell, CH8 7TH

Replacement of windows with new as like-for-like configuration in Accoya timber.

Full - Building Works Flintshire 9 Jul 2026
LDP/000589/26 8 Jul 2026 Pending

17 , Briarwood Road, Ewloe, CH5 3BU

Rear extension

Certificate of Lawfulness Sec 192 Flintshire 8 Jul 2026
FUL/000533/26 7 Jul 2026 Consultation period opened

The Old Telephone Exchange, Rhosesmor Road, Halkyn, Holywell, CH8 8DL

Proposed side and rear extension and re-ordering works to facilitate the replacement of the existing sunroom and create an additional bedroom and rati...

Full - Building Works Flintshire 7 Jul 2026
FUL/000344/26 6 Jul 2026 Pending

Tegfan Court, High Street, Caergwrle, LL12 9ES

2 New external escape stairs to flats 3 and 6.

Full - Building Works Flintshire 6 Jul 2026
LBC/000575/26 6 Jul 2026 Pending

Hendy Groes, Llanasa, Holywell, CH8 9LZ

Replace stable style oak back door with solid hardwood back door, replace curren

Listed Building Extensions and Alterations Flintshire 6 Jul 2026
FUL/000538/26 3 Jul 2026 Pending

Hill Cottage, Moel Y Crio, Mold, CH7 6PY

Proposed Renovation and Minor Extension to Existing Cottage

Full - Building Works Flintshire 3 Jul 2026
FUL/000574/26 3 Jul 2026 Pending

14, Sunnyside, Mancot, Deeside, CH5 2BE

Build new orangery extension to rear of property

Full - Building Works Flintshire 3 Jul 2026
FUL/000572/26 2 Jul 2026 Pending

RIDGEFIELD, Kinnerton Road, Hope, Wrexham, LL12 9RN

first floor side extension

Full - Building Works Flintshire 2 Jul 2026
LDP/000576/26 2 Jul 2026 Pending

THE PARK CLINIC, Earl Road, Mold, CH7 1AX

Proposed single storey rear 'infill' extension including all other works associa

Certificate of Lawfulness Sec 192 Flintshire 2 Jul 2026
FUL/000558/26 1 Jul 2026 Pending

20, Sealand Road, Sealand, Deeside, CH5 2RJ

Demolition of existing bungalow and construction of new Dormer bungalow and Gara

Full - Building Works Flintshire 1 Jul 2026
FUL/000566/26 1 Jul 2026 Pending

14, Abbotts Lane, Penyffordd, Chester, CH4 0HW

Rebuild attached garage and extend over 1st floor

Full - Building Works Flintshire 1 Jul 2026
FUL/000559/26 30 Jun 2026 Pending

OWAIN GLYNDWR INN, Glyndwr Road, Gwernymynydd, Mold, CH7 5LP

Proposed single storey rear extension, internal alterations

Full - Building Works Flintshire 30 Jun 2026
FUL/000539/26 29 Jun 2026 Pending

Bryn Teifion, Babell Road, Pantasaph, Holywell, CH8 8PW

Erection of new boundary wall to front of property

Full - Building Works Flintshire 29 Jun 2026
FUL/000497/26 25 Jun 2026 Consultation period opened

ROSE COTTAGE, Trelawnyd, Rhyl, LL18 6EB

Propose demolition and removal of existing garage and construction of new garage per attached plans.

Full - Building Works Flintshire 25 Jun 2026
FUL/000548/26 25 Jun 2026 Consultation period opened

SANDBANK, Gresford Road, Hope, Wrexham, LL12 9PW

Proposed utility and bedroom extension & first floor roof space conversion. Include alterations to entrance canopy/cover.

Full - Building Works Flintshire 25 Jun 2026
FUL/000546/26 25 Jun 2026 Consultation period opened

Unit 3 Acorn Business Park, Ground Floor, Aber Park Industrial Estate Road, Flint, CH6 5YN

ADDING TWO NEW WINDOWS ( AND WINDOW OPENINGS)

Full - Building Works Flintshire 25 Jun 2026
FUL/000550/26 25 Jun 2026 Consultation period opened

BRYN ALYN COTTAGE, Rhydymwyn, Mold, CH7 5HE

Proposed extension and alterations, including replacement detached garage

Full - Building Works Flintshire 25 Jun 2026
FUL/000544/26 24 Jun 2026 Consultation period opened

LYNSCOTT NURSERIES, Hendy Road, Mold, CH7 5JP

PROPOSED EXTENSIONS & ALTERATIONS

Full - Building Works Flintshire 24 Jun 2026
FUL/000529/26 23 Jun 2026 Consultation period opened

Railway Inn, Main Road, Ffynnongroyw, Holywell, CH8 9SN

Proposed Double Garage

Full - Building Works Flintshire 23 Jun 2026
FUL/000543/26 23 Jun 2026 Consultation period opened

Four Oaks, Lower Mountain Road, Penyffordd, Chester, CH4 0EU

Proposed extensions, alterations and temporary siting of static caravan

Full - Building Works Flintshire 23 Jun 2026
FUL/000528/26 19 Jun 2026 Consultation period opened

3, BRO DAWEL, Whitford Road, Whitford, Holywell, CH8 9AE

Construction of a two storey kitchen and bedroom extension

Full - Building Works Flintshire 19 Jun 2026
FUL/000468/25 17 Jun 2026 Republication period opened

Rising Sun, Nannerch, Mold, CH7 5RH

Proposed formation of a vehicular access

Full - Building Works Flintshire 17 Jun 2026
FUL/000508/26 17 Jun 2026 Publication period closed

Loxdale, Gresford Road, Hope, Wrexham, LL12 9SB

Proposed extension to existing garage and store.

Full - Building Works Flintshire 17 Jun 2026
FUL/000523/26 17 Jun 2026 Republication period opened

1, White Oaks Drive, Northop Hall, Mold, CH7 6LL

Erection of a single-storey rear extension and two-storey side extension with associated works to render the existing property.

Full - Building Works Flintshire 17 Jun 2026
FUL/000524/26 17 Jun 2026 Consultation period opened

73, Well Street, Buckley, CH7 2PQ

Removal of existing conservatory with proposed extensions and internal alterations with proposed garage conversion.

Full - Building Works Flintshire 17 Jun 2026
FUL/000525/26 17 Jun 2026 Consultation period opened

10, Upper Aston Hall Lane, Hawarden, CH5 3EN

Replace previous rear extension and form new porch

Full - Building Works Flintshire 17 Jun 2026
FUL/000516/26 16 Jun 2026 Consultation period opened

Eagle & Child Inn, Lon Capel, Gwaenysgor, Rhyl, LL18 6EJ

Construction of detached single storey garage/storage building anciliary to existing hospitality business.

Full - Building Works Flintshire 16 Jun 2026
FUL/000512/26 15 Jun 2026 Application invalid

53, High Street, Connahs Quay, Deeside, CH5 4DD

Proposed internal and external alterations, along with change of use from A1 to A3.

Full - Building Works Flintshire 15 Jun 2026
FUL/000514/26 15 Jun 2026 Consultation period opened

Glan Y Wern, Well Street, Trelawnyd, Rhyl, LL18 6DW

Alterations & construction of single storey orangery style extension, in lieu of existing conservatory to rear of existing dwelling.

Full - Building Works Flintshire 15 Jun 2026
LBC/000515/26 15 Jun 2026 Consultation period opened

27, High Street, Holywell, CH8 7TE

Listed Building Consent for proposed new shop front, repairs to existing front windows and replacement windows to the rear

Listed Building Extensions and Alterations Flintshire 15 Jun 2026
LDP/000511/26 15 Jun 2026 Under Consideration

1, THE GABLES, Station Lane, Hawarden, Deeside, CH5 3EG

Loft conversion within permitted development rights

Certificate of Lawfulness Sec 192 Flintshire 15 Jun 2026
FUL/000347/26 12 Jun 2026 Consultation period opened

115, Dee Road, Connahs Quay, Deeside, CH5 4PB

5m single storey extension to the rear of the property, allowing for an open plan kitchen diner and a lounge. Relocation of the garage (pushing the ga...

Full - Building Works Flintshire 12 Jun 2026
FUL/000494/26 11 Jun 2026 Consultation period opened

30, GLENVINE, Bryn Awelon, Mold, CH7 1LU

Single storey extension of kitchen to improve wheelchair accessibility and turning space.

Full - Building Works Flintshire 11 Jun 2026
FUL/000506/26 11 Jun 2026 Consultation period opened

BUCKLEY CRICKET CLUB, Chester Road, Buckley, CH7 3AQ

Single-storey extension to the existing Buckley Cricket Club clubhouse to provide enlarged home and away changing rooms, shower facilities, WC accommo...

Full - Building Works Flintshire 11 Jun 2026
LDP/000507/26 11 Jun 2026 Under Consideration

GLANLLYN, Llanfynydd, Wrexham, LL11 5HH

Proposed single-storey side extensions to an existing dwelling, to be carried out under permitted development.

Certificate of Lawfulness Sec 192 Flintshire 11 Jun 2026
FUL/000510/26 11 Jun 2026 Publication period closed

GLANLLYN, Llanfynydd, Wrexham, LL11 5HH

Proposed side extensions to an existing dwelling, including the demolition of an existing conservatory, and external rendering of the front elevation.

Full - Building Works Flintshire 11 Jun 2026
FUL/000431/26 10 Jun 2026 Publication period closed

6, Hazel Drive, Penymynydd, Chester, CH4 0NF

Retrospective Application: Imprinted concrete driveway

Full - Building Works Flintshire 10 Jun 2026
LDP/000458/26 10 Jun 2026 Decision Issued

BODOWEN, Ewloe Place, Buckley, CH7 3NL

Build a concrete base 35ft x 13ft for a caravan/ lodge to be sited on Caravan to be sited 6ft from any neighbouring properties Area is 40ft x 20ft ...

Certificate of Lawfulness Sec 192 Flintshire 10 Jun 2026
FUL/000428/26 9 Jun 2026 Consultation period opened

1, Lesters Lane, Bretton, Chester, CH4 0DA

Single storey extension to replace existing single storey extension and timber shed

Full - Building Works Flintshire 9 Jun 2026
FUL/000504/26 9 Jun 2026 Consultation period opened

4, Bryn Y Gwynt, Pentre Halkyn, Holywell, CH8 8HU

Proposed Single Storey Rear Extension with Roof Terrace. Removal of existing conservatory. Conversion of existing garage into home office. Replacem...

Full - Building Works Flintshire 9 Jun 2026
FUL/000477/26 5 Jun 2026 Republication period opened

36, Ffordd Glynne, Penymynydd, Chester, CH4 0TW

Retrospective Application: Rear extension and side garage

Full - Building Works Flintshire 5 Jun 2026
FUL/000491/26 4 Jun 2026 Under Consideration

1, Brookleigh Avenue, Mancot, Deeside, CH5 2BB

Rear/side 2 storey extension front porch and driveway/hardstanding, replacement roof to existing outbuilding

Full - Building Works Flintshire 4 Jun 2026
FUL/000480/26 3 Jun 2026 Publication period closed

Isfryn, Station Road, Bagillt, Flint, CH6 6AF

Single storey extension to rear & side elevations

Full - Building Works Flintshire 3 Jun 2026
FUL/000471/26 3 Jun 2026 Under Consideration

GREGGS, A55 Eb Brookside To Ewloe, Ewloe, Mold, CH7 6HF

Small extension to the side of a Greggs shop to provide a staff toilet.

Full - Building Works Flintshire 3 Jun 2026
FUL/000483/26 2 Jun 2026 Publication period closed

26, Queensway, Shotton, Deeside, CH5 1HT

New rear raised decking

Full - Building Works Flintshire 2 Jun 2026
FUL/000367/26 29 May 2026 Publication period closed

5, Old Warren, Broughton, Chester, CH4 0EG

We would like to add a single story rear extension to include a small downstairs bathroom, utility space and living room.

Full - Building Works Flintshire 29 May 2026
FUL/000454/26 29 May 2026 Under Consideration

The Homestead, Cefn Bychan Road, Pantymwyn, Mold, CH7 5EL

Demolition of existing bungalow and erection of replacement dwelling and garage with workshop and associated new entrance, hard and soft landscaping w...

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

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