House extensions in Kings Lynn

Kings Lynn received 578 householder applications in the last 12 months - about 11 a week. Rear extensions and garage works are the most common. Of the 470 decided so far, 438 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 138 applications
Today Awaiting decision 26/01797/F

Land East of 30 School Road Marshland St James Norfolk

Retrospective formation of a new access

Kings Lynn
Today Awaiting decision 26/01793/F

25 John Davis Way Watlington KINGS LYNN Norfolk PE33 0TB

Householder: Proposed first floor extension to existing bungalow and associated alterations

Kings Lynn
Yesterday Awaiting decision 26/01624/F

30 High Street Hunstanton Norfolk PE36 5AF

Install bay window to front of shop and install a rear external staircase to rear of the flat above

Full Application Kings Lynn
Yesterday Awaiting decision 26/01791/F

16 Robin Kerkham Way Clenchwarton King's Lynn Norfolk PE34 4BB

New highway access to residential property

Full Application Kings Lynn
6 Nov 2026 Awaiting decision 26/01787/F

16 Shernborne Road Dersingham King's Lynn Norfolk PE31 6HZ

Relocation of vehicular access

Full Application Kings Lynn
5 Nov 2026 Awaiting decision 26/01766/F

Queen Elizabeth Hospital Gayton Road Queen Elizabeth Hospital Site King's Lynn Norfolk PE30 4ET

New proposed roof-top ventilation plant on the West Wing Entrance block at QEH. Proposed roof finish replacement, new handrails and new window replace...

Full Application Kings Lynn
5 Nov 2026 Awaiting decision 26/01735/F

Two Hoots Church Street Thornham Hunstanton Norfolk PE36 6NJ

Paved driveway to replace existing gravel surface from site entrance to side of house

Full Application Kings Lynn
4 Nov 2026 Awaiting decision 26/01685/F

The Limes 107 Broomhill Downham Market Norfolk PE38 9QU

Proposed conversion of residential outbuilding to self contained dwelling with proposed detached garage block

Full Application Kings Lynn
4 Nov 2026 Awaiting decision 26/01741/F

Sandpiper House 41 Westgate Holme next The Sea Hunstanton Norfolk PE36 6LF

HOUSEHOLDER: Minor extension and alterations to front porch (single storey); external alterations to rear single storey roof and walls; replacement of...

Full Application Kings Lynn
3 Nov 2026 Awaiting decision 26/01785/F

19 Grafton Close King's Lynn Norfolk PE30 3EZ

Householder: Side and Rear Extension.

Full Application Kings Lynn
3 Nov 2026 Awaiting decision 26/01781/F

Bramble Cottage 21 Lynn Road Shouldham King's Lynn Norfolk PE33 0BT

Householder: Proposed Oak Framed & Glazed Garden Room

Full Application Kings Lynn
29 Oct 2026 Awaiting decision 26/01674/F

Memorial Hall High Street Fincham KINGS LYNN Norfolk PE33 9EJ

Proposed internal reconfiguration, new openings and fenestration and new external facing materials, removal of flat roofs and replace with pitched inc...

Full Application Kings Lynn
29 Oct 2026 Awaiting decision 26/01728/F

Tower House St James Green Castle Acre King's Lynn Norfolk PE32 2BD

HOUSEHOLDER: Garage conversion and first floor extension over garage

Full Application Kings Lynn
29 Oct 2026 Awaiting decision 26/01682/F

Annexe At The Hythe Bridge Road Downham Market Norfolk PE38 0AE

Removal of pitched roof structure over small single storey area and extend upwards with new internal staircase and new staff area complete with new pi...

Full Application Kings Lynn
28 Oct 2026 Awaiting decision 26/01753/F

46 Clarence Road Hunstanton Norfolk PE36 6HQ

HOUSEHOLDER - Demolition of existing conservatory, garage and outbuilding to enable new flat roof extension to accommodate kitchen/dining space. Re-ro...

Full Application Kings Lynn
28 Oct 2026 Awaiting decision 26/01740/LB

Ardmore House Main Road Crimplesham King's Lynn Norfolk PE33 9DX

Replacement of 4 standard windows and 1 bay window with double glazed units, repair and paint 2nd bay window

Listed Building Application Kings Lynn
28 Oct 2026 Awaiting decision 26/01739/F

Ardmore House Main Road Crimplesham King's Lynn Norfolk PE33 9DX

HOUSEHOLDER - Replacement of 4 standard windows and 1 bay window with double glazed units, repair and paint 2nd bay window

Full Application Kings Lynn
28 Oct 2026 Awaiting decision 26/01666/F

The Manor House 3 Chalk Pit Road Holme next The Sea Hunstanton Norfolk PE36 6LW

HOUSEHOLDER: Erection of a double garage

Full Application Kings Lynn
27 Oct 2026 Awaiting decision 26/01743/F

4 Park Lane Downham Market Norfolk PE38 9RN

HOUSEHOLDER: Single storey rear extension.

Full Application Kings Lynn
27 Oct 2026 Awaiting decision 26/01549/F

Lavender Cottage High Street Thornham Hunstanton Norfolk PE36 6LX

In-ground outdoor swimming pool. Sitting in front garden of Lavender Cottage, shielded from external view by 2m boundary fence, two trees, 12m parking...

Full Application Kings Lynn
27 Oct 2026 Awaiting decision 26/01727/F

87 Bexwell Road Downham Market Norfolk PE38 9LJ

Householder: New outbuilding/garden room

Full Application Kings Lynn
26 Oct 2026 Awaiting decision 26/01730/F

Charlotte Cottage 20 Sandringham Avenue Docking KINGS LYNN Norfolk PE31 8QH

HOUSEHOLDER: Single storey rear extension with balcony over

Full Application Kings Lynn
26 Oct 2026 Awaiting decision 26/01709/F

Wesley House Hills Court Hilgay Downham Market Norfolk PE38 0QE

HOUSEHOLDER: Proposed porch, Oak frame and rosemary tiled roof covering

Full Application Kings Lynn
23 Oct 2026 Awaiting decision 26/01725/F

Glenmarry Thiefgate Lane Saddlebow Norfolk PE34 3AP

HOUSEHOLDER - Single-storey pitched roof side extension to form a garden room.

Full Application Kings Lynn
22 Oct 2026 Awaiting decision 26/01715/F

Dundrum Cottage High Street Thornham HUNSTANTON Norfolk PE36 6LY

HOUSEHOLDER: Erection of a 2-storey glazed front extension to utilise part of the existing garden space, with rooflights. Conversion of the garage to ...

Full Application Kings Lynn
21 Oct 2026 Awaiting decision 26/01720/F

Eastfield Barn Chapel Road Tilney Fen End Tilney St Lawrence WISBECH Norfolk PE14 8JL

Proposed extension to dwelling including conversion of existing building to additional bedrooms and demolition of dwelling

Full Application Kings Lynn
20 Oct 2026 Awaiting decision 26/01555/F

Land At E569785 N323575 And SW of 31 Church Lane Roydon Norfolk

New self build dwelling and detached garage and new vehicular entrance

Full Application Kings Lynn
19 Oct 2026 Awaiting decision 26/01681/F

Sloe Cottage 31 Foundry Lane Ringstead King's Lynn Norfolk PE36 5LE

HOUSEHOLDER - Single storey garden room rear extension

Full Application Kings Lynn
19 Oct 2026 Awaiting decision 26/01676/F

15 Abbeyfields Abbey Road Great Massingham King's Lynn Norfolk PE32 2JE

HOUSEHOLDER - Proposed porch, new fenestration, boiler & wood burner flues, and new rooflights

Full Application Kings Lynn
19 Oct 2026 Awaiting decision 26/01644/LB

35 Churchgate Way Terrington St Clement King's Lynn Norfolk PE34 4LZ

Proposed alterations to existing grade II listed residential dwelling

Listed Building Application Kings Lynn
19 Oct 2026 Awaiting decision 26/01643/F

35 Churchgate Way Terrington St Clement King's Lynn Norfolk PE34 4LZ

HOUSEHOLDER: Proposed alterations to existing grade II listed residential dwelling

Full Application Kings Lynn
19 Oct 2026 Awaiting decision 26/01650/F

Brownsea 44 Beach Road Holme next The Sea Hunstanton Norfolk PE36 6LG

HOUSEHOLDER: Extension & alterations to dwelling and proposed garage

Full Application Kings Lynn
16 Oct 2026 Awaiting decision 26/01675/F

10 Birkbeck Close South Wootton King's Lynn Norfolk PE30 3LH

Householder: Attached Garden Store to Dwelling and Detached Annexe.

Full Application Kings Lynn
16 Oct 2026 Awaiting decision 26/01669/F

Pinfold The Green North Wootton King's Lynn Norfolk PE30 3RD

HOUSEHOLDER -Retrospective single storey extensions and rendering to dwelling and new detached garage

Full Application Kings Lynn
15 Oct 2026 Awaiting decision 26/01702/F

Spencer Farm Sutton Road Terrington St Clement King's Lynn Norfolk PE34 4EX

Demolition of existing dwelling and outbuildings and construction of replacement dwelling, attached annexe, detached double garage and garden wall/bou...

Full Application Kings Lynn
15 Oct 2026 Awaiting decision 26/01673/LB

26 All Saints Street King's Lynn Norfolk PE30 5AD

Installation of through floor lift

Listed Building Application Kings Lynn
15 Oct 2026 Awaiting decision 26/01670/F

Old Hunstanton Village Hall 36 Old Hunstanton Road Old Hunstanton HUNSTANTON Norfolk PE36 6HS

Extension and Alterations to Social Club including partial demolition.

Full Application Kings Lynn
15 Oct 2026 Awaiting decision 26/01667/F

35 Churchgate Way Terrington St Clement King's Lynn Norfolk PE34 4LZ

HOUSEHOLDER - Proposed alterations to existing boundary wall

Full Application Kings Lynn
14 Oct 2026 Awaiting decision 26/01665/F

59 North Beach Heacham King's Lynn Norfolk PE31 7LJ

Proposed Garage/Outbuilding

Full Application Kings Lynn
14 Oct 2026 Awaiting decision 26/01584/F

48 Station Road Heacham KINGS LYNN Norfolk PE31 7EY

Subdivison and refurbishment of the existing first-floor four bedroom apartment to form two self contained flats with associated window alternations a...

Full Application Kings Lynn
13 Oct 2026 Awaiting decision 26/01660/LB

26 Church Lane Heacham King's Lynn Norfolk PE31 7HJ

RESTROSPECTIVE Erection of a detached timber Summerhouse within the existing garden

Listed Building Application Kings Lynn
13 Oct 2026 Awaiting decision 26/01659/F

26 Church Lane Heacham King's Lynn Norfolk PE31 7HJ

HOUSEHOLDER and RETROSPECTIVE: Erection of a detached timber Summerhouse within the existing garden

Full Application Kings Lynn
13 Oct 2026 Awaiting decision 26/01625/F

Land West of Hootens And NW of 97 The Drove Barroway Drove Downham Market Norfolk PE38 0AL

Retrospective permission for storage containers and a proposed gate, together with a touring caravan to be used in conjunction with the land

Full Application Kings Lynn
12 Oct 2026 Awaiting decision 26/01654/LB

Manor Farm House 57 Burnham Road South Creake FAKENHAM Norfolk NR21 9JG

LISTED BUILDING: The addition of two dormer windows to the west side of the east wing of the building

Listed Building Application Kings Lynn
12 Oct 2026 Awaiting decision 26/01653/F

Manor Farm House 57 Burnham Road South Creake FAKENHAM Norfolk NR21 9JG

HOUSEHOLDER: The addition of two dormer windows to the west side of the east wing of the building

Full Application Kings Lynn
9 Oct 2026 Awaiting decision 26/01648/F

3 Hollycroft Close Emneth Wisbech Norfolk PE14 8BL

HOUSEHOLDER - Proposed single-storey extensions and alterations to bungalow

Full Application Kings Lynn
9 Oct 2026 Awaiting decision 26/01631/F

Waldeck 3 Dohamero Lane West Winch King's Lynn Norfolk PE33 0NL

HOUSEHOLDER: Single storey garage extension to front of property

Full Application Kings Lynn
8 Oct 2026 Awaiting decision 26/01639/F

82 Station Road Snettisham King's Lynn Norfolk PE31 7QS

Householder: Single Storey side extension and loft conversion incorporating dormer windows

Full Application Kings Lynn
8 Oct 2026 Awaiting decision 26/01630/F

Leeway 17 Main Road Brookville Thetford Norfolk IP26 4RB

HOUSEHOLDER: Extensions to garage and dwelling

Full Application Kings Lynn
8 Oct 2026 Awaiting decision 26/01607/F

The Chestnuts Wisbech Road Tipps End Welney Wisbech Norfolk PE14 9QN

Demolition of existing outbuildings. New extension to house replacing existing, with air source heat pump. Two new ancillary agricultural style buildi...

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

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