Class S prior approval scheme
The Classes S prior approval scheme in the UK permits the change of use of agricultural buildings to state-funded schools or registered nurseries, without requiring full planning permission, provided certain conditions are met and prior approval is obtained from the local planning authority.
The Class S prior approval scheme aims to facilitate the conversion of agricultural buildings to educational and childcare facilities, supporting the provision of essential services in rural areas. This helps to enhance community infrastructure and provide more opportunities for education and childcare in these regions.
By allowing these conversions under a prior approval scheme, the regulatory process is streamlined, making it easier and quicker to repurpose agricultural buildings for these important uses, while still ensuring that any significant adverse impacts are considered and mitigated.
Under Class S, agricultural buildings can be converted to the following uses:
- State-funded schools
- Registered nurseries
Conditions and limitations:
- Size Limit: The cumulative floor space of the building or buildings changing use under Class S must not exceed 500 square meters.
- Previous Use: The building must have been in agricultural use as part of an agricultural unit on or before 20 March 2013.
- Prior Approval: Prior approval from the local planning authority is required to assess:
The prior approval process involves submitting an application to the local planning authority. The authority will review the application to assess potential impacts related to transport, noise, contamination, and flooding. If the authority does not respond within the statutory period (usually 56 days), the development is deemed to have prior approval and can proceed.
[edit] Related articles on Designing Buildings.
- Alterations to existing buildings.
- Article 4 direction.
- Change of use class.
- Class Q permitted development.
- Class R prior approval scheme.
- Class Q prior approval scheme.
- CLC calls for rethink of permitted development rights.
- Conservation area.
- Enforcement notice.
- Established use certificate.
- IHBC responds to supporting defence infrastructure and the future of time-limited permitted development rights.
- Lawful development certificate.
- Listed building.
- Local development order.
- National planning policy framework.
- Permitted development: The end of the high street or a blessing in disguise?
- Planning enforcement.
- Planning permission.
- Prior approval.
- Renovation.
- Section 215.
- Sui generis.
- Town and Country Planning Act.
- Town and Country Planning (General Permitted Development) (Amendment) (England) Order.
- Use class.
Featured articles and news
We're expanding our collaborative mission by launching DB Intelligence, an exclusive market research advisory panel. Built environment professionals can now get paid to share their expertise on industry trends, products and services.
Panel members receive direct financial incentives for participating in research projects like short surveys, 1-2-1 interviews and focus groups. Register today to shape the future of the construction sector.
Building Control Independent Panel final report
A precis of a key report led by Dame Hackitt with full recommendations and link to the government response.
Guide to ISO 19650 for Architecture Firms (2026)
A user gives their low down.
A UK training and membership provider for mould remediation professionals.
Building Safety recap April, 2026
A short and longer run-through of the month, with links to further information and sources.
CIAT May 2026 briefing.
Independent NSI and BAFE study exploring how organisations are changing the way they buy fire safety services.
From medieval scribes to modern word art.
ECA welcomes crackdown on late payment and push for clean energy, whilst CIOB seek fixed cladding removal timeframes.
Cyber Security in the Built Environment
Protecting projects, data, and digital assets: A CIOB Academy TIS.
Managing competence in the built environment
ITFG publishes new industry guide on how to meet the ICC principles.
The UK's campaign to reduce noise pollution: Mythbusting, articles and topic guides.

















