House extensions in Kings Lynn

Kings Lynn received 275 householder applications in the last 12 months - about 5 a week. Rear extensions and garage works are the most common. Of the 152 decided so far, 140 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

143 last 90 days
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47 last 30 days
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24 last 14 days

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Showing 50 of 143 applications
26/01142/F 7 Jul 2026 Awaiting decision

Melanna 25 Ryston End Downham Market Norfolk PE38 9AX

Householder: Conversion of first floor area of existing garage to annex and single story rear extension to dwelling

Kings Lynn 7 Jul 2026
26/01130/F 6 Jul 2026 Awaiting decision

35 Salters Road Gaywood King's Lynn Norfolk PE30 4HF

HOUSEHOLDER: Demolition of existing poor quality side extension and replace with new side extension

Kings Lynn 6 Jul 2026
26/01125/LDP 6 Jul 2026 Awaiting decision

4 Church Terrace Sedgeford Road Docking King's Lynn Norfolk PE31 8LJ

Application for a Lawful Development Certificate for a proposed single storey rear extension and associated works

Kings Lynn 6 Jul 2026
26/01120/F 3 Jul 2026 Awaiting decision

Austin House 15 Austin Street King's Lynn Norfolk PE30 1DZ

Householder: Demolition of the existing garage/workshop and part of the potting shed. Demolition of an existing modern conservatory attached to the re...

Kings Lynn 3 Jul 2026
26/01121/LB 3 Jul 2026 Awaiting decision

Austin House 15 Austin Street King's Lynn Norfolk PE30 1DZ

Listed Building Application: Demolition of the existing garage/workshop and part of the potting shed. Demolition of an existing modern conservatory at...

Kings Lynn 3 Jul 2026
26/01115/F 2 Jul 2026 Awaiting decision

13 The Cedars Snettisham King's Lynn Norfolk PE31 7XG

Single storey extension and alterations to dwelling allowing for external finish changes.

Full Application Kings Lynn 2 Jul 2026
26/01113/F 2 Jul 2026 Awaiting decision

Bell House And The Old Bell School Road West Rudham King's Lynn Norfolk PE31 8TE

HOUSEHOLDER: Bell House - Proposed demolition of existing car-port and erection of new double car-port, demolition of existing boundary wall and erect...

Kings Lynn 2 Jul 2026
26/01097/F 1 Jul 2026 Awaiting decision

6 Davy Field Lynn Road Ingoldisthorpe KINGS LYNN Norfolk PE31 6TR

HOUSEHOLDER - Garden room/home gym with shower room and store Linked to existing dwelling.

Full Application Kings Lynn 1 Jul 2026
26/01093/F 1 Jul 2026 Awaiting decision

Colville 61 Sluice Road Denver Downham Market Norfolk PE38 0DY

HOUSEHOLDER: Extension to and conversion of part of existing garage into a self-contained residential annexe

Full Application Kings Lynn 1 Jul 2026
26/01104/F 1 Jul 2026 Awaiting decision

126 Bexwell Road Downham Market Norfolk PE38 9LJ

Repositioning of new vehicular access from that approved under 25/00646/F

Full Application Kings Lynn 1 Jul 2026
26/01096/F 1 Jul 2026 Awaiting decision

29 Hay Green Road North Terrington St Clement King's Lynn Norfolk PE34 4PY

HOUSEHOLDER: proposed single storey rear and side extension with flat roof and lantern

Kings Lynn 1 Jul 2026
26/01102/F 1 Jul 2026 Awaiting decision

Sycamore Farm Chapel Road Tilney Fen End Tilney St Lawrence Wisbech Norfolk PE14 8JL

HOUSEHOLDER: Proposed extensions and alteration to existing dwelling

Kings Lynn 1 Jul 2026
26/01087/LB 29 Jun 2026 Awaiting decision

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

Listed Building Application: Installation of through floor lift

Listed Building Application Kings Lynn 29 Jun 2026
26/01083/F 26 Jun 2026 Awaiting decision

24 Collins Lane Heacham King's Lynn Norfolk PE31 7DZ

Householder: Proposed rear extension and part garage conversion to provide annexe ancillary to existing dwelling.

Full Application Kings Lynn 26 Jun 2026
26/01082/FM 26 Jun 2026 Awaiting decision

Stoke Ferry Timber Ltd Boughton Road North Stoke Ferry KINGS LYNN Norfolk PE33 9BF

RETROSPECTIVE: Change of Use, Paddock to dog walking area.. Erection of perimeter fence with netting 1.8 metres high to prevent escape. Dog training a...

Kings Lynn 26 Jun 2026
26/01076/F 25 Jun 2026 Awaiting decision

Townsend Farm House Middle Drove Marshland St James Wisbech Norfolk PE14 8JT

HOUSEHOLDER: Demolition of existing conservatory with new residential extension forming 1 additional Bedroom.

Full Application Kings Lynn 25 Jun 2026
26/01077/F 25 Jun 2026 Awaiting decision

39 South Everard Street King's Lynn Norfolk PE30 5HJ

HOUSEHOLDER: Replacement of the front door, retention of the existing UPVC windows on the front elevation, replacement of the external rainwater goods...

Full Application Kings Lynn 25 Jun 2026
26/01067/F 24 Jun 2026 Awaiting decision

18 Church Farm Road Heacham King's Lynn Norfolk PE31 7JB

HOUSEHOLDER: Single storey rear kitchen, utility and garden room extension. Garage conversion.

Full Application Kings Lynn 24 Jun 2026
26/01064/F 23 Jun 2026 Awaiting decision

Stratton House 12 St Georges Court Thornham HUNSTANTON Norfolk PE36 6NR

HOUSEHOLDER: New garden wall and gate to eastern boundary

Full Application Kings Lynn 23 Jun 2026
26/01061/F 23 Jun 2026 Awaiting decision

Home Lea 85 Stanhoe Road Great Bircham King's Lynn Norfolk PE31 6GP

HOUSEHOLDER - Proposed Rear Extension & Alterations to Dwelling House

Full Application Kings Lynn 23 Jun 2026
26/01060/F 23 Jun 2026 Awaiting decision

7 Glenfield Close Outwell Wisbech Norfolk PE14 8RU

HOUSEHOLDER: Single storey rear extension

Full Application Kings Lynn 23 Jun 2026
26/01052/F 23 Jun 2026 Awaiting decision

16 Lode Avenue Upwell Wisbech Norfolk PE14 9BH

HOUSEHOLDER: To place a 40ft by 15ft mobile home/ caravan in my garden for a family member to use. Utilities will be connected via my property. The fa...

Full Application Kings Lynn 23 Jun 2026
26/01063/F 23 Jun 2026 Awaiting decision

Whitehall Farm Walsingham Road Burnham Thorpe King's Lynn Norfolk PE31 8HN

Retrospective planning application for change of use of part of barn for use as a public bar and kitchen area and construction of two single storey ex...

Kings Lynn 23 Jun 2026
26/01042/F 22 Jun 2026 Awaiting decision

Oakwood House Common Road West Bilney KINGS LYNN Norfolk PE32 1JX

HOUSEHOLDER: Proposed single-storey side and rear extensions including link to garage, new porch and balcony structures. Various internal and external...

Full Application Kings Lynn 22 Jun 2026
26/01044/F 22 Jun 2026 Awaiting decision

11 Cedar Way West Lynn King's Lynn Norfolk PE34 3JY

HOUSEHOLDER: Demolition of existing attached garage, and construction of new single storey side extension

Full Application Kings Lynn 22 Jun 2026
26/01047/F 22 Jun 2026 Awaiting decision

Harbourside Main Road Brancaster Staithe King's Lynn Norfolk PE31 8BP

HOUSEHOLDER: Ground and First floor extension to the West of the property, replacing an existing Ground Floor Garage. Small Ground floor extension to ...

Full Application Kings Lynn 22 Jun 2026
26/01050/F 22 Jun 2026 Awaiting decision

29 Windsor Road King's Lynn Norfolk PE30 5PL

Retrospective: Householder: Front iron gates with and brick pillars

Full Application Kings Lynn 22 Jun 2026
26/01043/F 19 Jun 2026 Awaiting decision

12 Brancaster Close King's Lynn Norfolk PE30 3EW

HOUSEHOLDER: First floor side extension

Full Application Kings Lynn 19 Jun 2026
26/01024/F 17 Jun 2026 Awaiting decision

20 The Birches South Wootton King's Lynn Norfolk PE30 3JG

HOUSEHOLDER - First Floor/Two Storey Extension to Dwelling.

Full Application Kings Lynn 17 Jun 2026
26/01023/F 17 Jun 2026 Awaiting decision

Thurlow Cottage 16 Eastgate Holme next The Sea Hunstanton Norfolk PE36 6LL

Single storey detached outbuilding

Full Application Kings Lynn 17 Jun 2026
26/01027/F 16 Jun 2026 Awaiting decision

Hamara Fen Road Wiggenhall St Mary Magdalen KINGS LYNN Norfolk PE34 3DB

HOUSEHOLDER - Proposed Cart Lodge

Full Application Kings Lynn 16 Jun 2026
26/01018/F 16 Jun 2026 Awaiting decision

Marsh Barn Cross Lane Brancaster King's Lynn Norfolk PE31 8AE

Proposed side extension to align with the existing structure and provide an ensuite for the bedroom.

Full Application Kings Lynn 16 Jun 2026
26/01021/F 16 Jun 2026 Awaiting decision

Broadview 106 Sutton Road Terrington St Clement King's Lynn Norfolk PE34 4PJ

HOUSEHOLDER: Proposed Detached Garage

Full Application Kings Lynn 16 Jun 2026
26/01020/F 16 Jun 2026 Awaiting decision

Nightingale Lodge Nightingale Lane Downham Market Norfolk PE38 9BG

HOUSEHOLDER: Two storey extension on rear of existing two storey dwelling

Full Application Kings Lynn 16 Jun 2026
26/01030/F 16 Jun 2026 Awaiting decision

High House Trinity Road Walpole Highway Wisbech Norfolk PE14 7SN

Householder: Two Storey Side Extension, front porch, raise roof to rear extension with lantern light and alterations

Full Application Kings Lynn 16 Jun 2026
26/01002/F 15 Jun 2026 Awaiting decision

Domville Glebe Lane Burnham Overy Staithe KINGS LYNN Norfolk PE31 8JQ

HOUSEHOLDER: Conservatory added to the Southwest corner of existing dwelling to the ground floor only

Full Application Kings Lynn 15 Jun 2026
26/01006/F 15 Jun 2026 Awaiting decision

Fridhem Rest Home 79 Station Road Heacham King's Lynn Norfolk PE31 7AB

Replacement porch.

Full Application Kings Lynn 15 Jun 2026
26/01000/F 12 Jun 2026 Awaiting decision

5 Oxborough Drive South Wootton King's Lynn Norfolk PE30 3HZ

HOUSEHOLDER: Detached Car Port (revised design)

Full Application Kings Lynn 12 Jun 2026
26/00993/F 12 Jun 2026 Awaiting decision

Youth Centre Avenue Road Hunstanton Norfolk PE36 5BW

Extensions, alterations and refurbishment of Community Centre

Full Application Kings Lynn 12 Jun 2026
26/00980/F 11 Jun 2026 Awaiting decision

6 Middle Farm Cottages Church Lane Little Massingham King's Lynn Norfolk PE32 2JW

HOUSEHOLDER: Single Storey Extension to existing Dwelling house and Detached Garage/Cartshed

Full Application Kings Lynn 11 Jun 2026
26/00981/F 10 Jun 2026 Awaiting decision

14 Station Road Dersingham King's Lynn Norfolk PE31 6PP

HOUSEHOLDER: Extension to existing dwelling to link to existing Annex and associated alterations

Full Application Kings Lynn 10 Jun 2026
26/00978/F 10 Jun 2026 Awaiting decision

10 Branodunum Brancaster King's Lynn Norfolk PE31 8AL

HOUSEHOLDER - Extension and renovation of existing dwelling.

Full Application Kings Lynn 10 Jun 2026
26/00977/LB 10 Jun 2026 Awaiting decision

Westgate House 90 Market Place Burnham Market King's Lynn Norfolk PE31 8HD

Works to allow for outbuilding to be used for continued residential use in association with dwelling

Listed Building Application Kings Lynn 10 Jun 2026
26/00976/F 10 Jun 2026 Awaiting decision

Westgate House 90 Market Place Burnham Market King's Lynn Norfolk PE31 8HD

HOUSEHOLDER - Works to allow for outbuilding to be used for continued residential use in association with dwelling

Full Application Kings Lynn 10 Jun 2026
26/00990/F 10 Jun 2026 Awaiting decision

2 Hare House Station Road Docking King's Lynn Norfolk PE31 8LS

Removal and replacement of existing garden wall and the removal of existing oil tank and replacement with buried oil tank

Full Application Kings Lynn 10 Jun 2026
26/00979/F 10 Jun 2026 Awaiting decision

Land N of 57 And 67 Fen Road Rowan Close Watlington Norfolk PE33 0UG

SELF BUILD: Substitution of house type including change of materials and position of a detatched garage on existing planning permission No 06/00145FM

Full Application Kings Lynn 10 Jun 2026
26/00991/F 10 Jun 2026 Awaiting decision

Crossways Ringstead Road Docking King's Lynn Norfolk PE31 8PL

Householder: Demolition of single storey extension. New single storey extension. Timber cladding to existing external fletton brick walls. New Windows...

Full Application Kings Lynn 10 Jun 2026
26/00950/F 8 Jun 2026 Awaiting decision

101 Lynn Road Snettisham King's Lynn Norfolk PE31 7QD

HOUSEHOLDER: Single storey side and rear extension

Full Application Kings Lynn 8 Jun 2026
26/00957/F 8 Jun 2026 Awaiting decision

Carrstone Lodge Pullover Road Tilney All Saints King's Lynn Norfolk PE34 4SG

HOUSEHOLDER: Proposed extension to existing house and construction of new outbuilding

Full Application Kings Lynn 8 Jun 2026
26/00954/F 8 Jun 2026 Awaiting decision

39 Marram Way Heacham King's Lynn Norfolk PE31 7AH

Householder: Proposed extension and alterations

Full Application Kings Lynn 8 Jun 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 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.