Planning application
26/01035/FUL
Walnut Farm Science Park Lockgate Road Sidlesham West Sussex
Proposal
Demolition of existing lean-to building and construction of replacement building within Class E(g) use (office, research, and development and light industry)
As published by the council, reference 26/01035/FUL
Timeline
Dates from the published record
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8 May 2026
Received by South Downs National Park
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15 May 2026
Validated
Checked as complete and ready for consideration.
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27 Jul 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with South Downs National Park for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
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26/00352/PLD Granted
3 Walnut Farm Science Park Lockgate Road Sidlesham West Sussex PO20 7QQ
Proposed single storey extension to commercial building.
-
12/00100/COU Granted
Units 1 And 2 Walnut Farm Science Park Lockgate Road Sidlesham West Sussex PO20 7QQ
Storage and preparation of cars.
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12/00100/COU Granted
Units 1 And 2 Walnut Farm Science Park Lockgate Road Sidlesham West Sussex PO20 7QQ
Storage and preparation of cars.
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26/00111/PA3Q Awaiting decision
Willowdene Nursery Fletchers Lane Sidlesham Chichester West Sussex PO20 7QG
Prior Approval of Proposed Change of Use of an existing agricultural building to 1 no' dwellinghouse (Use Class C3), and for associated operational development, under Part 3, Class Q(c) of The Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended) which was amended by Statutory Instrument 2024 No. 579 which came into effect on 21st May 2024.
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26/00931/FUL Granted
South Barn Willowdene Fletchers Lane Sidlesham West Sussex PO20 7QG
Erection of 1 no. 3 bed dwelling - alternative to planning permission SI/23/01011/FUL.
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26/00931/FUL Granted
South Barn Willowdene Fletchers Lane Sidlesham West Sussex PO20 7QG
Erection of 1 no. 3 bed dwelling - alternative to planning permission SI/23/01011/FUL.
Other full applications applications
In South Downs National Park
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26/01604/FUL Awaiting decision
Donnington Manor Farm Selsey Road Donnington Chichester West Sussex PO20 7PL
Construction of 1 no. building for 3 no. commercial units.
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26/01512/FUL Awaiting decision
The Coach House Village Road Kirdford Billingshurst West Sussex RH14 0LU
Change of use of existing dwelling (C3) to community church meeting hall F2(b).
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26/01507/FUL Awaiting decision
80 Exton Road Chichester West Sussex PO19 8BT
S73 retrospective conversion of single dwelling to form as 2no. separate care units.
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26/01492/FUL Awaiting decision
Willowdene Nursery School Tangmere Road Tangmere Chichester West Sussex PO20 2HW
Change of use from remaining A2 (nursery) to C3 (residential) with external alterations.
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26/01459/FUL Awaiting decision
Cassino 4 - 5 Market Road Chichester West Sussex PO19 1JW
Change of use of ground floor from Public House (sui generis) to Adult Gaming Centre (sui generis) and associated office use on the first floor. Application under Section 73 to vary Condition 4 (hours of operation) from planning permission CC/26/00500/FUL to allow trading of the premises from 08:30 until midnight, 7 days a week for the AGC and associated office use.