House extensions in Flintshire

Flintshire received 290 householder applications in the last 12 months - about 6 a week. Rear extensions and garage works are the most common. Of the 212 decided so far, 196 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 75 applications
22 Oct 2026 Consultation period opened FUL/000876/26

Bronwylfa, Hawarden Road, Wrexham, Caergwrle, LL12 9BB

Erection of a two-storey side extension above the existing garden room, with int

Full - Building Works Flintshire
16 Oct 2026 Consultation period opened FUL/000857/26

10, Mold Road, Caergwrle, Flintshire, LL12 9LP

Orangery to rear of the property

Full - Building Works Flintshire
12 Oct 2026 Consultation period opened FUL/000837/26

BALI HAI, Bretton Lane, Bretton, Chester, CH4 0DW

Conversion of the attached garage at Bali Hai, together with a single storey rear extension, to form a small ground floor annex.

Full - Building Works Flintshire
9 Oct 2026 Consultation period opened FUL/000730/26

CARNINGLI, Trelogan, Holywell, CH8 9BZ

Erection of rear extensions comprising two-storey and single-storey elements, together with internal alterations and extension of the paving area.

Full - Building Works Flintshire
6 Oct 2026 Consultation period opened FUL/000824/26

Oak Tree Cottage, Lower Mountain Road, Penyffordd, Chester, CH4 0EU

Proposed side single storey extension, replacement glazing and new timber frame porch

Full - Building Works Flintshire
5 Oct 2026 Consultation period opened FUL/000819/26

OSBORNE BARN, Wrexham Road, Penyffordd, Chester, CH4 0HT

First Floor Extension with Double Storey Feature Extension for Stairway

Full - Building Works Flintshire
5 Oct 2026 Consultation period opened FUL/000773/26

33, Mold Road, Broughton, Chester, CH4 0PQ

Retrospective planning application for Summerhouse/garden room

Full - Building Works Flintshire
3 Oct 2026 Consultation period opened FUL/000806/26

66, Hawarden Road, Caergwrle, Wrexham, LL12 9BY

Removal of hedging to the front and side of front garden, including removal of cherry tree, removal of lawn and soil, creating parking for two vehicle...

Full - Building Works Flintshire
2 Oct 2026 Consultation period opened FUL/000820/26

11, Godrer Mynydd, Gwernymynydd, Mold, CH7 4AD

Erection of single storey flat roofed extension at rear of dwelling. (This application is being made on behalf of an Register Disabled Person and is p...

Full - Building Works Flintshire
2 Oct 2026 Publication period closed FUL/000817/26

2, Firbeck Close, Broughton, Chester, CH4 0TG

Proposed side and rear extension and re-model of existing garage

Full - Building Works Flintshire
2 Oct 2026 Consultation period opened FUL/000810/26

51, Plymouth Street, Shotton, Deeside, CH5 1HZ

Rear extension

Full - Building Works Flintshire
1 Oct 2026 Consultation period opened FUL/000815/26

Moorefield House, Babell Road, Pantasaph, Holywell, CH8 8PW

Ground and First Floor Extensions

Full - Building Works Flintshire
1 Oct 2026 Under Consideration LDP/000783/26

9, Ash View, Aston, Deeside, CH5 1BL

Lawful Development certificate for proposed garage conversion to a micro-scale meal preparation business

Certificate of Lawfulness Sec 192 Flintshire
1 Oct 2026 Consultation period opened FUL/000799/26

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

Proposed side and rear extensions and internal alterations

Full - Building Works Flintshire
30 Sept 2026 Approved 12 Oct LDP/000812/26

1, The Sidings, Buckley, CH7 3DQ

LDC - Single Storey Rear Extension

Certificate of Lawfulness Sec 192 Flintshire
28 Sept 2026 Consultation period opened FUL/000801/26

17 , Pippins Close, Shotton, CH5 1PE

Single storey rear extension

Full - Building Works Flintshire
28 Sept 2026 Application allocated to Case Officer FUL/000807/26

Coachman's Cottage, Hall Lane, Sychyn, Mold, CH7 6AD

Conversion of Stable Block and Store to ancillary accommodation.

Full - Building Works Flintshire
28 Sept 2026 Publication period closed FUL/000802/26

17, Blackbrook Avenue, Hawarden, Deeside, CH5 3HJ

Rear two storey extension.

Full - Building Works Flintshire
25 Sept 2026 Application Valid FUL/000803/26

ALLERTON LODGE CARE HOME, Calcot, Holywell, CH8 8LG

proposed construction of detached annex to existing care home for on site staff accomodation

Full - Building Works Flintshire
25 Sept 2026 Consultation period opened FUL/000798/26

GWENALLT, Ysceifiog, Holywell, CH8 8NJ

Extensions to existing dwelling to provide additional bedrooms and enlarged habitable space.

Full - Building Works Flintshire
24 Sept 2026 Publication period closed FUL/000686/26

EWLOE POST OFFICE, The Highway, Hawarden, Deeside, CH5 3DN

Erection of a single-storey rear extension and two-storey rear extension, the conversion of part of the existing building into a restaurant, the reten...

Full - Building Works Flintshire
23 Sept 2026 Consultation period opened FUL/000777/26

Ysgol Parc y Llan & Ysgol Terrig, Treuddyn, Mold, CH7 4LN

Single-storey front entrance extension to Ysgol Terrig, together with a single-storey side extension to accommodate the Ysgol Terrig Early Years Centr...

Full - Building Works Flintshire
17 Sept 2026 Publication period closed FUL/000786/26

22, Godrer Mynydd, Gwernymynydd, Mold, CH7 4AD

Conversion of the existing attached garage to habitable accommodation with a mezzanine floor, a new pitched roof and new windows, a single storey rear...

Full - Building Works Flintshire
17 Sept 2026 Under Consideration LDP/000787/26

62, The Nurseries, Halkyn Road, Flint, CH6 5UJ

Garage conversion - to home office/hobby room

Certificate of Lawfulness Sec 192 Flintshire
17 Sept 2026 Publication period closed FUL/000785/26

23, Hafod Park, Mold, CH7 1QN

Proposed rear single storey extension, two storey side extension and internal alterations

Full - Building Works Flintshire
17 Sept 2026 Under Consideration FUL/000782/26

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

Resubmitted application following refusal for the demolition of existing dwelling and the construction of a high-quality replacement 2 storey, 4 bedro...

Full - Building Works Flintshire
17 Sept 2026 Publication period closed FUL/000770/26

PWLL GWYN, London Road, Trelawnyd, Rhyl, LL18 6EB

Replacement porch, new pitched roof replacing flat roof and side extension forming sunroom

Full - Building Works Flintshire
14 Sept 2026 Application allocated to Case Officer FUL/000776/26

9, 11 & 13, Northop Road, Flint, CH6 5LG

Extensions to and material alterations to the external appearance of the buildings.

Full - Building Works Flintshire
14 Sept 2026 Recommendation made FUL/000772/26

106, Wood Lane, Hawarden, Deeside, CH5 3JE

Erection of a single-storey ground-level extension (requiring removal of existing prefabricated garage). To be built to a high level of sustainability...

Full - Building Works Flintshire
11 Sept 2026 Approved 24 Sep LDP/000766/26

2, Hill Road, Higher Kinnerton, Chester, CH4 9FX

S192 app for Construction of an extension to the rear of the property

Certificate of Lawfulness Sec 192 Flintshire
11 Sept 2026 Approved 5 Oct LDP/000742/26

36, St Peters Park, Northop, Mold, CH7 6DR

Erection of a single storey extension to the rear of the existing property. Prop

Certificate of Lawfulness Sec 192 Flintshire
10 Sept 2026 Under Consideration FUL/000765/26

98 Kelsterton Road Connah's Quay Deeside CH5 4BJ

Proposed Single storey rear extension with a flat roof. Two storey side extension. New front porch and internal alterations.

Full - Building Works Flintshire
10 Sept 2026 Publication period closed FUL/000728/26

8, CALAVERAS, Bryn Awelon, Mold, CH7 1LU

As per application - Proposed extension to existing.

Full - Building Works Flintshire
10 Sept 2026 Recommendation made FUL/000734/26

2, St Andrews Close, Hawarden, Deeside, CH5 3QQ

To remove a 4.4 meter long section of existing garden wall which is set back 2.5 meters from the pavement across a grass verge, and to replace it with...

Full - Building Works Flintshire
7 Sept 2026 Approved 26 Oct FUL/000757/26

9, Higher Common Road, Buckley, CH7 3NG

Side and Rear Extension

Full - Building Works Flintshire
7 Sept 2026 Recommendation made FUL/000745/26

RAKE COTTAGE, Rake Lane, Hawarden, Deeside, CH5 3PN

New Garage and Storage Space

Full - Building Works Flintshire
7 Sept 2026 Under Consideration FUL/000698/26

35 , Wepre Lane, Connahs Quay, CH5 4JR

Proposed rear extension and internal modifications

Full - Building Works Flintshire
3 Sept 2026 Under Consideration FUL/000732/26

61, High Street, Holywell, CH8 7TF

Single storey extension to rear of existing premises

Full - Building Works Flintshire
2 Sept 2026 Recommendation made FUL/000735/26

Roseneath, 5 , Hawarden Road, Penyffordd, CH4 0JD

Proposed bungalow to dormer bungalow extension, single storey rear extension and 2 storey rear extension.

Full - Building Works Flintshire
2 Sept 2026 Publication period closed LBC/000737/26

PLAS HAFOD HOTEL, Hafod Road, Gwernymynydd, Mold, CH7 5JS

Listed Building Consent - Demolition of existing conservatory and construction of timber decked seating area

Listed Building Extensions and Alterations Flintshire
2 Sept 2026 Publication period closed FUL/000736/26

PLAS HAFOD HOTEL, Hafod Road, Gwernymynydd, Mold, CH7 5JS

Demolition of existing conservatory and construction of timber decked seating area

Full - Building Works Flintshire
1 Sept 2026 Republication period opened FUL/000726/26

Briarfield, Old Aston Hill, Ewloe, Deeside, CH5 3AH

Construction of a new tarmac driveway with an integrated linear drainage system connected to an internal soakaway. Widening of the existing access ont...

Full - Building Works Flintshire
27 Aug 2026 Approved 20 Oct FUL/000720/26

65, Beechwood Road, Saltney, Chester, CH4 8TN

Rear extension for disabled adaptation

Full - Building Works Flintshire
27 Aug 2026 Withdrawn 7 Oct FUL/000722/26

71, Parkfield Road, Broughton, Chester, CH4 0SA

Single-storey pitched roof front extension to provide a fully accessible shower

Full - Building Works Flintshire
27 Aug 2026 Approved 11 Sep LDP/000719/26

NANT Y GLYN, Alltami Road, Alltami, Mold, CH7 6RW

Proposed garden room in garden of existing house

Certificate of Lawfulness Sec 192 Flintshire
27 Aug 2026 Republication period opened FUL/000706/26

17, Manor Drive, Buckley, CH7 2HX

Extension to rear garden using common land adopted by highways

Full - Building Works Flintshire
27 Aug 2026 Publication period closed FUL/000692/26

Haddef, Llinegar Hill, Ffynnongroyw, CH8 9SY

Proposed extensions & major alterations & proposed oak frame car port & partial demolition of existing structures

Full - Building Works Flintshire
25 Aug 2026 Approved 20 Oct FUL/000691/26

5 Eccleston Road Higher Kinnerton

Single storey rear extension and replacement of front window with patio doors

Full - Building Works Flintshire
24 Aug 2026 Approved 15 Oct FUL/000709/26

Lisla, 30, Little Mountain Road, Buckley, CH7 3BY

Proposed Single Storey Rear Extension

Full - Building Works Flintshire
24 Aug 2026 Withdrawn 2 Sep FUL/000704/26

Bryn Haul, Moel Y Crio, Mold, CH7 6PY

Proposed conversion and extension of existing office into ancillary accommodatio

Full - Building Works Flintshire
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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 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.