Councils have 56 days to determine a Class Q prior approval application. Most applicants know this. What most do not know is what it actually means when a council misses that deadline.
The 56-day rule comes from the Town and Country Planning (General Permitted Development) Order. It sets a fixed window for the local planning authority to notify you of their decision. Not a target. A deadline.
If they miss it, any decision they issue after that point has no legal effect. A refusal issued on day 57 is not a valid refusal. A conditional approval issued late carries no enforceable conditions. The clock ran out and the council lost its opportunity to determine the application.
In practice this means you may be able to proceed with the development without waiting for a decision at all.
What the Rule Actually Says
If the council misses the deadline
Once 56 days have passed from the date the application was received, without the authority notifying you of their decision, you are entitled to proceed. Any notice issued after that point, whether approval or refusal, has no legal effect. The courts have confirmed this position in multiple cases, including a High Court ruling that quashed a council refusal issued after the 56-day period had expired.
The caveat most people miss
Deemed consent only applies if the building genuinely qualifies as permitted development in the first place. If the building does not meet the Class Q eligibility criteria, a missed deadline changes nothing. The council failing to respond in time does not create a permission that the law does not otherwise grant. You still need to be certain the building qualifies before relying on the 56-day rule.
Extensions of time
Councils sometimes ask for more time and applicants sometimes agree. Be careful. Case law has confirmed that the 56-day period cannot formally be extended, even by agreement between the parties. If you agree to an extension and the council misses the original deadline, the legal position can become complicated. The safest approach is to track the deadline yourself from the validation date and take advice before agreeing to anything.
Important: Before relying on a missed deadline to proceed with development, take proper advice. The legal position is clear in principle but the application to individual cases depends on whether the building genuinely qualifies. Proceeding on the basis of deemed consent when the building does not qualify is a serious risk.
The 56-day rule is one of those things that most applicants never think about until they need it. By then it is usually too late to have tracked the deadline properly.
Count from the validation date, not the submission date. Keep a record. And if the council is approaching the deadline without issuing a decision, do not assume they will get there in time.
The Class Q Farmers Guide covers the prior approval process in full, including how to manage the timeline, what to watch for, and how to protect your position throughout.
The Class Q Farmers Guide
Everything you need to know about the Class Q prior approval process. Based on direct experience, not theory.
Get the Guide · £67