How long does planning permission last? Plus, find out how to 'lock in' permission

half built house with scaffold and timber frame
(Image credit: Getty Images)

Are you looking at your application and wondering 'how long does planning permission last' and 'what happens if I don't start by the expiry date'? Don't worry we have all of the answers you need concerning planning permission deadlines, start dates and the consequences of not meeting these timelines. 

The journey to achievng planning permission on a self build or extension can be straightforward for some and overwhelming and draining for others, depending on the project — many of those who endeavour to go through the process may need a well-needed break afterwards! 

headshot of planning expert
James Garrett

James has over 20 years experience working in planning. Currently providing subject matter expertise to support Planning Portal’s transformational agenda and help them meet user needs whilst ensuring legislative compliance for their content and online services.The Planning Portal aims to make information concerning the planning process and services simpler and more accessible for applicants, agents and local authorities. 

Amy Reeves

Assistant Editor Amy began working for Homebuilding & Renovating in 2018. She has an interest in sustainable building methods and always has her eye on the latest design ideas. Amy has interviewed countless self builders, renovators and extenders about their experiences for Homebuilding & Renovating magazine. She is currently renovating a mid-century home, together with her partner, on a DIY basis, and has recently fitted her own kitchen.