Class Q Barn Conversion Calculator
Check agricultural building to residential conversion eligibility under the amended 2024 GPDO, 10-dwelling allowances, 1,000 m² floorspace limits, and 56-day prior approval rules.
Location & Statutory Exclusions (Paragraph Q.1)
2024 Scheme Limits (SI 2024/579 Caps)
Allowed only on hardstanding existing on or before 24 July 2023.
Required 56-Day Prior Approval Submission
Class Q & Permitted Development Legal Guides
Official statutory guidance referencing the GPDO 2015, SI 2024/579, and Planning Inspectorate appeal precedents.
How Do I Find Planning Applications Near Me in the UK?
You can search current and recent planning applications near any UK address using our free Planning Applications Near Me tool, powered directly by official planning.data.gov.uk data. Simply enter your postcode to view approved, pending, and refused applications within 0.25, 0.5, or 1.0 mile of your property over the last 5 years.
Can I Object to a Neighbour's Planning Application in the UK?
Yes. Anyone has the statutory right to object to any planning application during the 21-day public consultation period. However, planning officers and committees can only consider 'material planning considerations' such as loss of light, overlooking, overbearing scale, and traffic danger. Objections based on loss of property value or personal disputes are legally dismissed.
How Long Does Planning Permission Last in the UK?
Full planning permission in the UK typically lasts for 3 years from the date decision notice is issued. If you do not lawfully commence material operations on site within this 3-year window, the permission lapses permanently and you must submit a completely fresh planning application.
What Is the Difference Between Permitted Development and Planning Permission?
Permitted Development Rights (PDR) are statutory rights granted by Parliament allowing homeowners to build extensions, loft conversions, and outbuildings within strict size limits without applying to the council. Full planning permission requires submitting architectural plans to the local council, which decides whether to grant or refuse permission based on local policies.
How to Find Out If a Property Has Planning Permission in the UK?
You can check if a property has planning permission by searching the local council's online planning register using the property address or postcode, reviewing the local authority search (CON29 / LLC1) during conveyancing, or ordering an official copy of the planning history from your Local Planning Authority.
Can You Apply for Planning Permission on Someone Else's Property in the UK?
Yes. In the UK, you do not need to own a property or plot of land to apply for planning permission on it. However, under Section 65 of the Town and Country Planning Act 1990 and Article 13 of the DMPO 2015, you must sign an Ownership Certificate and serve formal statutory notice (Certificate B) on all legal freeholders and long-leaseholders at least 21 days before submitting the application.
Class Q Barn Conversion FAQs
Under The Town and Country Planning (General Permitted Development and Compensation Orders) (Amendment) (England) Order 2024 (SI 2024/579), effective 21 May 2024, the Government overhauled Class Q: (1) Developers can now create up to 10 dwellings per agricultural unit (up from 5), (2) the cumulative residential floorspace cap increased to 1,000 square metres, (3) the maximum size for any single dwelling is capped at 150 square metres, and (4) single-storey rear extensions of up to 4 metres are now permitted on existing hardstanding in place before 24 July 2023.