Everyone’s heard of it. Half the internet swears it’s the golden ticket to open your dog field without planning permission. The other half has an enforcement notice blu-tacked to the fridge.
Let’s unpick it – properly.
What the 28-Day Rule Actually Says
Under Part 4, Class B of the General Permitted Development Order (GPDO 2015, as amended), land can be used for up to 28 days in any calendar year for something different from its normal use – without full planning permission.
In practice that means:
- It must be a temporary use.
- You can’t build permanent infrastructure.
- You must be able to stop and revert the land to its normal use at any time.
- And yes, you need to be able to prove it only ran for those 28 days.
So technically you can open a field under this rule. But it’s not the slick ‘open for summer and see how it goes’ loophole people think it is.
Why It Doesn’t Really Work for Dog Fields
- Permanent looks permanent.
Booking systems, signage, bins, hardstanding – they all scream established business, not temporary use. Councils don’t like being treated as if they can’t spot a pattern. If you don’t have that stuff, have you actually got a dog field? The answer is probably nope. - Infrastructure crosses the line.
The 28-day rule doesn’t grant permission for the physical stuff – fencing, gates, car-parking surfacing, lighting, water points. The moment you install these, you’ve stepped into ‘operational development’ and that triggers the need for planning.
However… this is where it gets murky. Some types of fencing may be covered under your permitted development rights – certain heights, distance from a highway etc. and depending on what the land is classed as. It’s one of those ‘yes, but only if…’ planning grey zones. - We’ll untangle fencing and PD rights properly in a separate article, because that’s a rabbit hole all of its own.
- It can backfire on your application.
If the council sees you’ve been trading, advertising, or taking bookings, your ‘test period’ suddenly looks like unauthorised use. That can delay or prejudice a future application.
When It Can Work in Your Favour
Used with restraint, the 28-day allowance can still be helpful:
- Pilot days – to gather feedback, noise data, or access observations.
- Photo or video shoots – for marketing material while you’re building your case.
- Proof of concept – to demonstrate community demand in your planning statement.
Keep meticulous records – dates, photos, purpose – and you can actually use that evidence later to strengthen your application.
The Smart Way to Play It
Use your 28 days as reconnaissance, not revenue.
Gather data, test logistics, and show you’re being responsible. You’ll look proactive instead of opportunistic, which goes a long way with planning officers.
Final Word
The 28-Day Rule isn’t a free pass – it’s a polite nod from the council to let you test an idea responsibly. Respect it, and it can help your case. Stretch it, and you’ll end up on the wrong end of a site visit.