For landowners · Cornwall

Farm diversification in Cornwall — matching the idea to a planning route that exists

Diversification projects fail at planning far more often than they fail commercially, and usually because the proposal was designed before anyone asked which policy route supports it. Cornwall's rural policy is workable, but it rewards proposals framed as re-use and rural enterprise rather than as new development in the countryside.

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01

Routes that tend to work

Re-use of existing buildings is consistently easier than new build in the open countryside.

  • Class Q conversion of redundant agricultural buildings to dwellings, within its limits
  • Class R change of use of agricultural buildings to a flexible commercial use
  • Conversion of stone barns to holiday accommodation or workspace, on re-use and heritage grounds
  • Agricultural buildings under permitted development, subject to prior notification and size limits
  • Seasonal or temporary camping and glamping uses, where the site and access support it

02

The constraints that decide it

Access and highways come first — a single-track lane with poor visibility will limit an intensification proposal regardless of design merit. Then drainage, ecology, landscape impact in the AONB, and whether the enterprise can be evidenced as genuinely rural rather than a housing scheme in agricultural clothing.

03

Design that earns its consent

Proposals that read as agricultural in form and material — simple volumes, dark timber or profiled sheet, minimal domestic paraphernalia and hard landscaping — sit far better in a Cornish valley and in an officer's report than a suburban interpretation of a rural building.

Frequently asked

Straight answers.

Do I need permission for glamping pods?
Usually yes, as a material change of use of the land, and often with conditions on siting, seasonality and numbers. Access and drainage capacity are the practical determinants.
Can I build a new agricultural building without applying?
Agricultural permitted development allows certain buildings on holdings over a minimum size, subject to prior notification of siting and appearance and to dimensional limits. It does not extend to residential or commercial use.
What is Class R?
A permitted change of use of an agricultural building to a flexible commercial use within a floorspace limit, via prior approval. It is a useful route for workshops, storage and small business units.
Will the AONB designation stop a diversification scheme?
Not automatically, but it raises the bar on landscape and visual impact, and it removes some permitted development allowances. Schemes that use existing buildings and existing access do best.

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