Diversifying into events in a working farmyard
Part 4 of the General Permitted Development Order allows 28 days of temporary use a year on land, but excludes buildings and anything inside a curtilage. Where that leaves farm events, and the evidence a permanent consent needs.
Running a handful of events a year on farmland can sit inside the temporary use right in Part 4 of the General Permitted Development Order 2015, which allows the use of land for any purpose on up to 28 days in a calendar year. The catch that defeats most farm events planning permission questions is in the exclusions: that right applies to land, not to buildings, and not to land within the curtilage of a building. So the field is covered and the barn is not.
That one distinction decides whether you are running a lawful sideline or an unauthorised change of use.
Temporary use rights and their annual limits
Class B of Part 4 permits the use of any land for any purpose for not more than 28 days in total in any calendar year, together with the provision on the land of any moveable structure for the purposes of that use. Of those 28 days, no more than 14 may be used for holding a market or for motor car and motorcycle racing.
Three limitations do the real work.
The right does not apply where the land in question is a building or is within the curtilage of a building. A yard enclosed by barns is almost always within a curtilage, so the 28 days does not help you there. An open field beyond the farmstead is a different matter.
The days are counted per calendar year and per planning unit, and they include setting up and taking down where the land is in use for the purpose. A marquee standing for four days around a single Saturday event is four days, not one.
The land's ordinary use has to return in between. If the field is laid out with permanent hardstanding, permanent lighting columns and a permanent bar structure, the ordinary agricultural use has gone and the 28-day argument goes with it.
| Activity | Likely position |
|---|---|
| Open field used for a weekend event, marquee removed afterwards | Within Class B if the day count holds |
| Event inside a barn or in the enclosed yard | Outside Class B, planning permission needed |
| Permanent car park, access track or toilet block built for events | Operational development, separate permission needed |
| Events on 30 or more days a year | Outside Class B, material change of use |
Where repeated events become a material change
Day counting is a trap because the planning question is not only arithmetic. The use of land changes materially when the character of the activity changes, and a farm that runs 25 events a year with an office, a website and three staff is reading as an events business whichever way you count the days.
Councils look at the whole picture: the permanence of infrastructure, the proportion of income, the presence of signage, staffing, advertised bookings and the effect on neighbours. The threshold is the same one that decides when horses on a holding become a business, and the reasoning transfers directly.
Honest advice: if the events are growing, apply for permission before the complaints start rather than after. An application made from a position of lawful operation is a planning judgement. An application made in response to an enforcement notice is a rescue.
Noise, lighting and the evidence expected
Noise is the issue that produces objections, and it is the issue most farm applications under-evidence.
A baseline survey of existing background sound levels at the nearest dwellings, taken over a period that covers the evening and night hours when events actually run, is the starting point. Amplified music needs predicted levels at the facade of the nearest receptors with the proposed source positions and any barrier effect from buildings. Where music is inside a barn, the sound insulation of the structure matters more than anything else, and a tin roof is effectively acoustically transparent at bass frequencies.
Planning Practice Guidance on noise sets the framework, and a competent acoustician will apply the relevant standards for entertainment noise rather than treating a wedding as a factory. A Noise Impact Assessment prepared by a suitably qualified author is what councils expect here, and professional review is strongly advised because environmental health officers read these documents closely.
Lighting is easier and still gets neglected. Rural sites usually sit in the darkest environmental zones, so the obtrusive light limits are strict. Submit a layout with column positions, mounting heights, luminaire schedules and spill contours at the site boundary, and offer a curfew.
Smells, mud and dust get mentioned in objections. Say where the generator sits, how the access track is surfaced, and what happens when it rains for a week.
Access, parking and field surfaces
The highway authority will want visibility splays at the access measured to the speed of the lane, a swept path for the largest vehicle expected, and a view on whether a single-track approach can absorb 60 cars arriving in an hour.
Parking on grass is acceptable to most councils and acceptable to the highway authority only if it works in February. Reinforced grass systems, a geotextile and crushed stone base, or a cellular confinement layer all read differently in landscape terms and in drainage terms. Laying permanent hardstanding is operational development, so it needs its own permission even where the use itself sits within the temporary right.
Set out the arrival and departure management: marshals, signage that comes down afterwards, a one-way route if the lane is narrow, and a rule about coaches.
Foul drainage and welfare provision
Peak occupancy is the number that matters, and it is nothing like the farm's normal loading. A 150-guest wedding produces a short, intense load that a domestic septic tank cannot take.
Where there is no mains connection, the options are hired welfare units for occasional events or a package treatment plant sized for the design load. A discharge to ground or to surface water needs to meet the Environment Agency general binding rules for small sewage discharges, or needs a permit where the rules are not met. Get the design load calculated properly rather than estimated, because an undersized plant fails in public.
Hired units are the honest answer for a genuine 28-day operation. A permanent plant implies a permanent use, and officers read it that way.
Conditions that make a scheme workable
Where permission is granted, expect conditions and treat them as the negotiation rather than the verdict. The ones that usually appear:
- A maximum number of events each calendar year, and a maximum number involving amplified music.
- Hours of operation, with a separate and earlier curfew for amplified music and for outdoor use.
- A noise limiter set to an agreed level, calibrated and sealed, with the setting recorded.
- All amplified music inside the building with doors and windows closed after a stated time.
- An event management plan covering marshalling, dispersal, taxi arrangements and a complaints contact.
- Restrictions on floodlighting and a lighting scheme to be approved before first use.
- A limit on the period a marquee may stand.
Negotiate the numbers at application stage with evidence. A condition limiting you to 12 events when the business plan needs 30 is harder to change afterwards, and the way diversification into workshops and offices is handled shows how much the drafting matters.
Applying before enforcement arrives
Councils generally find out about farm events from a neighbour, not from a monitoring visit. Once a complaint is logged, the file is open and the burden shifts to you to show the use is lawful.
Keep contemporaneous records from the first season: a dated log of every event day, photographs showing the marquee up and down, booking confirmations, and the receipts for hired welfare units. If the 28-day argument is ever tested, that log is the evidence, and nothing reconstructed later is as good.
Where the use has outgrown the right, a full application needs a Planning Statement that deals with the policy position on rural diversification, the economic case, the fallback of the temporary use right, and each technical objection in turn. The same discipline applies to shorter-season uses, and the day-count mechanics are worth comparing with the 60 day camping and caravan temporary use right, which works to a different limit.
To see which supporting documents a change of use application on your holding is likely to need, enter your postcode on PlanScope and work through the guided questions.
This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it, and note that a Lawful Development Certificate is the only formal way to confirm that a use is lawful. For specialist technical reports, qualified professional input may be required. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
Frequently asked questions
Does the 28 day rule cover events held inside a barn?
No. Class B of Part 4 does not apply where the land in question is a building or is within the curtilage of a building, so events inside a barn or in an enclosed yard fall outside the right entirely. Only open land beyond a curtilage benefits, which is why marquee events in a field are treated differently from barn events.
How are the 28 days counted?
Per calendar year and per planning unit, including the days the land is in use for setting up and clearing away where a structure is on the ground. A marquee standing from Thursday to Sunday counts as four days. Of the 28, no more than 14 may be used for a market or for motor car and motorcycle racing.
At what point do repeated events become a change of use?
When the character of the use changes, which is a judgement rather than a day count. Permanent infrastructure, staffing, advertised bookings, signage and the share of income all point towards an events business. Councils weigh the whole picture, so a holding running frequent commercial events will usually need permission even if days are managed carefully.
What noise evidence will the council expect?
A baseline survey covering the evening and night periods when events run, predicted levels at the nearest dwellings with the proposed source positions, and an assessment of the barn's sound insulation where music is indoors. Expect a Noise Impact Assessment by a suitably qualified acoustician, and expect environmental health officers to read it closely.
Can I build a permanent car park for events under the temporary use right?
No. The right permits a use of land and the provision of moveable structures, not operational development. Laying permanent hardstanding, access tracks, lighting columns or a toilet block requires separate permission, and building them tends to undermine the argument that the ordinary agricultural use returns between events.
What foul drainage provision is needed for occasional events?
Hired welfare units are the usual answer for a genuine 28 day operation, because a permanent treatment plant implies a permanent use. Where a plant is proposed, size it on the peak design load rather than the farm's normal loading, and check whether the discharge meets the Environment Agency general binding rules or needs a permit.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.