House extensions in Knowsley

Knowsley received 173 householder applications in the last 12 months - about 3 a week. Rear extensions and side extensions are the most common. Of the 130 decided so far, 127 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 48 of 48 applications
7 Sept 2026 Awaiting decision 26/00439/CLD

103 Tarbock Road Huyton Knowsley L36 5TD

Certificate of lawful development for the erection of a proposed rear dormer extension

Certificate of Lawful Use/ Dev. Proposed Knowsley
1 Sept 2026 Pending 26/00171/FUL

26 Harriers Crescent Westvale Kirkby Knowsley L32 4AD

Erection of a pergola (retrospective)

Full Application Knowsley
1 Sept 2026 Pending 26/00427/FUL

3 Woodland Road Halewood Knowsley L26 1XE

Erection of a single storey side and rear extension together with the demolition of existing garage.

Full Application Knowsley
28 Aug 2026 Awaiting decision 26/00179/FUL

43 Thingwall Hall Drive Roby Knowsley L14 5PE

Installation of dropped kerb for vehicular access together with amendments to parking arrangements

Full Application Knowsley
28 Aug 2026 Pending 26/00399/PDE

4 Greystone Road Roby Knowsley L14 6UG

Prior approval for the erection of a single storey rear extension maximum depth from original rear wall: 4.90 metres maximum height: 3.80 metres heigh...

Prior Notification - Household Knowsley
26 Aug 2026 Pending 26/00418/FUL

30 Blackburne Drive Halewood Knowsley L25 0QF

Erection of a two storey side and part two storey rear extension.

Full Application Knowsley
26 Aug 2026 Awaiting decision 26/00288/FUL

The Smithy Greensbridge Lane Tarbock Green Knowsley L35 1QH

Demolition of existing garage together with the erection of 1no. Self-contained annexe within curtilage of existing dwelling.

Full Application Knowsley
25 Aug 2026 Awaiting decision 26/00408/FUL

Unicorn Inn 405 Cronton Road Cronton Knowsley WA8 5QF

Erection of a single storey rear extension to kitchen (retrospective)

Full Application Knowsley
24 Aug 2026 Pending 26/00420/FUL

495 Cronton Road Cronton Knowsley WA8 5QH

Erection of a single storey side extension.

Full Application Knowsley
17 Aug 2026 Awaiting decision 26/00333/FUL

The Barley Mill Greensbridge Farm Greensbridge Lane Tarbock Green Knowsley L35 1QD

Erection of a single storey rear extension.

Full Application Knowsley
17 Aug 2026 Awaiting decision 26/00404/FUL

12 Lysander Road Prescot Knowsley L34 1BP

Conversion of integral garage to form habitable room

Full Application Knowsley
13 Aug 2026 Awaiting decision 26/00310/FUL

4 Rectory Drive Halewood Knowsley L26 6LJ

Installation of new obscured window to first floor gable wall

Full Application Knowsley
12 Aug 2026 Awaiting decision 26/00400/FUL

26 Rosebank Road Huyton Knowsley L36 3AB

Proposed conversion of existing garage to a habitable space for use by a disabled person

Full Application Knowsley
11 Aug 2026 Awaiting decision 26/00351/FUL

46 Sugar Lane Knowsley Knowsley L34 0ER

Erection of a single storey front, side and rear extension. Demolition of existing front extension.

Full Application Knowsley
11 Aug 2026 Awaiting decision 26/00382/FUL

10 Pear Tree Road Huyton Knowsley L36 5UB

Erection of two storey side extension

Full Application Knowsley
10 Aug 2026 Awaiting decision 26/00391/PDE

23 Lapwing Court Halewood Knowsley L26 7WH

Prior approval for the erection of a single storey rear extension maximum depth from original rear wall: 4.00 metres maximum height: 3.65 metres heigh...

Prior Notification - Household Knowsley
7 Aug 2026 Awaiting decision 25/00571/FUL

AM2PM Convenience Store 18 - 20 Mackets Lane Halewood Knowsley L25 0LQ

Part single and part two-storey rear extension; installation of plant and extraction equipment in association with exsiting shop use and use as restau...

Full Application Knowsley
7 Aug 2026 Awaiting decision 26/00388/FUL

101 Rimmer Avenue Roby Knowsley L16 2NF

Erection of first floor side extension

Full Application Knowsley
5 Aug 2026 Awaiting decision 26/00386/FUL

5 Whitestone Close Knowsley Knowsley L34 7HG

Erection of a part two storey and single storey extension to side and rear with construction of pitched roof to front elevation

Full Application Knowsley
3 Aug 2026 Awaiting decision 26/00379/FUL

36 Archway Road Huyton Knowsley L36 9XE

Change of use from residential dwelling (use Class C3) to dental practice (use Class E(e)) together with external alterations comprising demolition of...

Full Application Knowsley
30 Jul 2026 Awaiting decision 26/00371/FUL

Halewood Academy The Avenue Halewood Knowsley L26 1UU

External alterations to building comprising of roof refurbishment to form enclosures to existing plant and associated works

Full Application Knowsley
29 Jul 2026 Awaiting decision 26/00102/FUL

47 Edgemoor Drive Field Lane Estate Knowsley L10 1LP

Erection of two storey side and rear extension and part single storey rear extension

Full Application Knowsley
23 Jul 2026 Approved 26/00348/FUL

27 Trispen Close Halewood Knowsley L26 7YP

Erection of a single storey side and rear extension.

Full Application Knowsley
21 Jul 2026 Awaiting decision 26/00327/PDE

24 Kendal Road Tower Hill Kirkby Knowsley L33 2ED

Prior approval for the erection of a single storey rear extension maximum depth from original rear wall: 4.00 metres maximum height: 3.30 metres heigh...

Prior Notification - Household Knowsley
15 Jul 2026 Approved 26/00341/FUL

63 Lawton Road Roby Knowsley L36 4HN

Erection of single storey front and side extension

Full Application Knowsley
15 Jul 2026 Awaiting decision 26/00340/FUL

39 Tithebarn Road Knowsley Knowsley L34 0EU

Erection of a two storey side extension and single storey front and rear extension with partial demolition of existing garage

Full Application Knowsley
14 Jul 2026 Approved 26/00320/PDE

82 Fernwood Drive Halewood Knowsley L26 7ZB

Prior approval for the erection of a single storey rear extension maximum depth from original rear wall: 4.50 metres maximum height: 2.97 metres heigh...

Prior Notification - Household Knowsley
10 Jul 2026 Approved 26/00384/FUL

29 Melling Way Kirkby Park Kirkby Knowsley L32 1TN

Erection of single storey wrap around extension to the front, side and rear (following demolition of attached garage and rear extension)

Full Application Knowsley
10 Jul 2026 Awaiting decision 26/00331/FUL

All In One 175 - 177 Tarbock Road Huyton Knowsley L36 5TG

Installation of new shop frontage to the st john road facing elevation, installation of 1 no. new door opening to ground floor Tarbock Road facing ele...

Full Application Knowsley
10 Jul 2026 Approved 26/00299/FUL

142 Rupert Road Roby Knowsley L36 9TH

Erection of a single storey rear extension.

Full Application Knowsley
8 Jul 2026 Awaiting decision 26/00329/FUL

84 Roby Road Roby Knowsley L36 4HG

Erection of a two storey side extension, part two storey / part single storey rear extension and single storey front extension

Full Application Knowsley
7 Jul 2026 Approved 26/00231/FUL

9 Swallow Close Tower Hill Kirkby Knowsley L33 4DG

Erection of a two storey side extension and 1 no. outbuilding to rear

Full Application Knowsley
7 Jul 2026 Approved 26/00309/PDE

16 Sandiway Huyton Knowsley L36 0UW

Prior approval for the erection of a single storey rear extension maximum depth from original rear wall: 4.72 metres maximum height: 3.26 metres heigh...

Prior Notification - Household Knowsley
6 Jul 2026 Approved 26/00285/FUL

34 Briar Drive Roby Knowsley L36 9XQ

Erection of two storey side extension, single storey front and rear extension

Full Application Knowsley
3 Jul 2026 Awaiting decision 26/00258/FUL

32 Lancaster Road Huyton Knowsley L36 1US

Erection of two storey side extension

Full Application Knowsley
1 Jul 2026 Awaiting decision 26/00275/FUL

Access To Woodcroft Way Off West Street Prescot Knowsley

Installation of electrically operated vehicular and pedestrian gates.

Full Application Knowsley
1 Jul 2026 Awaiting decision 26/00290/FUL

42 Greystone Road Roby Knowsley L14 6UG

Erection of a part two storey side and rear extension.

Full Application Knowsley
30 Jun 2026 Approved 26/00253/FUL

51 Wimborne Road Huyton Knowsley L14 8UE

Erection of single storey rear extension

Full Application Knowsley
30 Jun 2026 Approved 26/00292/FUL

3 Yew Tree Road Halewood Knowsley L25 9QN

Erection of a single storey front and rear extension.

Full Application Knowsley
30 Jun 2026 Approved 26/00317/FUL

92 Manchester Road Prescot Knowsley L34 1NQ

Proposed single storey side extension

Full Application Knowsley
29 Jun 2026 Approved 26/00159/FUL

1 Baileys Lane Halewood Knowsley L26 2XB

Erection of single storey rear extension, enlargement of existing front window and alerations to ground floor commercial unit

Full Application Knowsley
29 Jun 2026 Approved 26/00316/PDE

70 Barkbeth Road Huyton Knowsley L36 3TX

Prior approval for the erection of a single storey rear extension maximum depth from original rear wall: 5.96 metres maximum height: 3.29 metres heigh...

Prior Notification - Household Knowsley
24 Jun 2026 Awaiting decision 26/00306/FUL

Land To The North Of Unit 1 Symmetry Logistics Park Merseyside Colliery Way Cronton Knowsley L35 3AA

Erection of a close board timber fence To The North Of Unit 1 Symmetry park

Full Application Knowsley
22 Jun 2026 Approved 26/00241/FUL

23 Cowper Way Huyton Knowsley L36 0TP

Erection of single storey front extension to form porch

Full Application Knowsley
18 Jun 2026 Approved 26/00259/FUL

32 Balmoral Way Huyton Knowsley L34 1QB

Conversion of garage to habitable room

Full Application Knowsley
15 Jun 2026 Approved 26/00286/FUL

20 Seathwaite Crescent Tower Hill Kirkby Knowsley L33 2DW

Erection of a single storey rear extension.

Full Application Knowsley
15 Jun 2026 Approved 26/00261/FUL

56 Hall Lane Tower Hill Kirkby Knowsley L33 4YS

Erection of single storey side extension

Full Application Knowsley
13 Jun 2026 Refused 26/00135/FUL

1 Ross Close Knowsley Knowsley L34 0EP

Erection of 1.9 m high concrete post / base board and timber panel fence and access gate to side boundary

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

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