Short answer: A landowner does not normally need to secure planning permission before opening a conversation with a developer. Planning may be pursued by the owner, by a developer under an agreed structure, or as a condition of a future purchase.
Why land is often discussed before permission exists
Preparing a credible application can require planning, architectural, highways, drainage, ecological, arboricultural and other work. The appropriate team depends on the site. Undertaking every study before a commercial route is agreed can expose a landowner to unnecessary cost.
What can be assessed initially?
A proportionate desktop review may examine the development plan, settlement position, planning history, flood mapping, heritage designations, ecology records, highway access and the relationship with surrounding homes. This is screening—not a planning decision.
Pre-application advice from the local planning authority can sometimes help identify policy or technical issues. It is not binding and cannot guarantee the outcome of a later application.
How permission can affect value
Unconsented land carries uncertainty. A planning permission may reduce some uncertainty, but its value depends on what was approved, the conditions, obligations, infrastructure requirements, build costs and market demand. Gross development value is not the same as the amount payable for land.
Possible routes
Sell without permission
Quicker in principle, but the buyer prices planning risk and may require due diligence.
Conditional contract
A purchase proceeds only if agreed conditions—commonly planning—are satisfied.
Option agreement
The developer receives a time-limited right to buy subject to negotiated terms.
Read the full acquisition-method comparison and obtain independent legal and tax advice before agreeing terms.
Authoritative sources and further reading
National policy provides the broad framework, but decisions are normally made against the development plan for the local area unless material considerations indicate otherwise.