If you are weighing up an extension against moving, or buying a house with plans to enlarge it, England's new planning decision arrangements are relevant from 31 October 2026. They change who decides many applications; they do not give a particular extension permission.

What starts on 31 October

The government's statutory guidance, published on 1 June, confirms the commencement date. Under the national scheme, householder applications generally fall into the category that planning officers must decide. Councillors concentrate on applications that qualify for committee consideration.

There are exceptions. Applications linked to certain listed-building consents and retrospective applications follow different provisions; applications involving a council's own interests have special arrangements. The scheme does not cover National Park Authorities, the Broads Authority, development corporations or the Homes and Communities Agency. Ask the relevant planning authority which route applies to your property. This is an England change, not a new UK-wide planning system.

Faster decisions are an aim, not a booking date

A government announcement published on 30 October highlights extensions and loft conversions as examples that could benefit. It also describes expanding the PlanAssist pilot from three councils to 15 for a year, with wider availability intended by the end of 2027.

The reported trial improvements do not establish a four-week decision deadline for your application. Officers remain responsible for decisions, and the announcement says the normal planning process continues. Do not assume an application will be approved, or arrange building work around a predicted decision date solely because of the announcement.

Checks before committing to a purchase or move

  • During viewings, separate the space a home already provides from changes you hope to make. Add the proposed works to your viewing checklist as questions to investigate.
  • Ask the planning authority to confirm the relevant application process and expected timetable. If an application is already underway, check its current position rather than assuming the new scheme has changed the outcome or removed a requirement.
  • When comparing extending with moving, collect separate quotes for the building project and the transaction. Use the moving cost calculator for the moving side of that comparison; it does not price an extension or establish that work is permitted.
  • Keep survey findings separate from planning assumptions. Our property surveys guide can help you prepare questions about the building itself. Get the proposed works and required permissions checked before treating extra space as part of your buying decision.

A useful next step is a confirmed answer about your specific property, rather than a general promise of a quicker planning system.