Class Q and Class R: Converting Agricultural Buildings

Did you know that, under current planning law, you may be able to convert certain agricultural buildings into homes or commercial spaces without full planning permission?

For many, gaining consent for the conversion of rural buildings can be challenging. Local planning authorities don’t always support development in the countryside. To address this, the Government introduced permitted development rights through the General Permitted Development Order (GPDO).

Two of the most useful routes are Class Q and Class R. Class Q allows the conversion of agricultural buildings into homes, while Class R allows conversion into a range of commercial uses, from offices and shops to gyms and storage.

In both cases, you’ll still need to apply to your local planning authority. This is done through a process called prior approval, which is simpler than a full planning application and usually determined within 56 days.

If you’re considering your options, getting the right planning advice early on can make all the difference.

What is Class Q?

Class Q allows the conversion of agricultural buildings into residential homes. It’s one of the most common routes for rural development, especially where full planning permission may be difficult to secure. Class Q covers both the change of use and the building works, but only where the structure is suitable for conversion.

The key point is this: the building must already be capable of conversion. You can adapt it, but you can’t completely rebuild it. The structure needs to be sound, and the overall agricultural character should remain.

In practice, that means you can introduce windows and doors to create a home, but you can’t significantly alter the building’s size or shape. Some local planning authorities are more cautious than others, particularly when it comes to modern farm buildings, so it’s important to understand how your site will be viewed.

Key Class Q Rules

– The building must have been in agricultural use for at least 10 years
– It must be structurally sound and capable of conversion
– You can’t extend beyond the original footprint or height
– The site must have suitable access
– The building should retain its agricultural character

You can create up to five dwellings, with limits on size and total floorspace.

Where Class Q Doesn’t Apply

Class Q cannot be used if the building is:

– Listed or within the curtilage of a listed building
– In a conservation area, National Park, AONB, or SSSI
– Recently built or extended under permitted development rights

Class Q and the Planning Process

Although Class Q sits outside a full planning application, you’ll still need to apply for prior approval. Your local planning authority will review:

– Highways and access
– Flood risk
– Noise and contamination
– Ecology considerations

They may also request further reports to support your application. A decision is usually made within 56 days.

What is Class R?

Class R allows the conversion of agricultural buildings into commercial uses, offering a flexible way to bring rural buildings back into use. This can include:

– Offices
– Shops
– Cafés
– Gyms
– Hotels
– Storage or light industrial uses

Unlike Class Q, Class R covers change of use only. You can’t alter the structure or external appearance of the building as part of this route. If physical works are needed, you’ll need to submit a separate planning application. It’s a practical option for diversifying rural property and making better use of existing buildings.

Key Class R Rules

– The building must have been in agricultural use for at least 10 years
– Maximum floorspace is 1000m²
– The structure and external appearance cannot be altered
– Listed buildings (and their curtilage) are excluded

If you need to make physical changes, a separate planning application will be required.

Class R and Prior Approval

– Under 150m²: notify the local planning authority
– 150m² to 1000m²: prior approval required

The authority will assess:

– Traffic and highways impact
– Noise
– Flood and contamination risks

As with Class Q, decisions are typically made within 56 days.

Class Q or Class R: Choosing the Right Route

Both Class Q and Class R provide valuable routes for the conversion of agricultural buildings, but they serve different purposes.

Class Q is about creating homes. Class R is about enabling commercial use.

The right approach depends on your building, your location, and what you want to achieve. Local planning authorities can take different views, and small details can make a big difference to the outcome.

That’s why early, straightforward planning advice is so important.

Common Challenges in Converting Agricultural Buildings

While permitted development can simplify the process, there are still risks to manage.

– Not all agricultural buildings are suitable for conversion
– Structural limitations can affect viability
– Your local planning authority may raise concerns
– Ecology, access, and flood risk can delay approval

This is where clear, practical planning law advice is essential, especially before submitting any form of planning application or prior approval.

How We Help With Class Q and Class R

At Berrys, we specialise in the conversion of rural buildings and agricultural property.

We’ll support you with:

– Clear, practical planning advice and planning law advice
– Assessing whether Class Q or Class R applies
– Managing your prior approval or planning application
– Preparing drawings, access strategies, and supporting reports

At Berrys, we work closely with landowners, farmers and developers on the conversion of rural buildings.

We’ll help you understand what’s possible, guide you through the planning process, and manage your prior approval or planning application from start to finish. We can also provide drawings, access design and drainage strategies where needed.

If you’re just looking for clear, honest planning advice, we’re here for that too. Get in touch.

Explore Our Planning Services

You can find out more about our related services:

Planning Applications
Planning Appeals
Town Planning

FAQs

Do I Need a Planning Application for Class Q or Class R?

Not always. Class Q and Class R are permitted development rights, so a full planning application is often not required. However, you will normally need prior approval from your local planning authority before starting any conversion of agricultural buildings.

What is Prior Approval in Planning Law?

Prior approval is a simpler alternative to a full planning application. Under planning law, the local planning authority reviews specific impacts, such as highways, noise, and flood risk, before allowing development to proceed.

Are All Agricultural Buildings Eligible?

Not all agricultural buildings qualify under Class Q or Class R. They must meet planning law requirements around use, structural condition, and location. Buildings in protected areas or with listed status are often excluded.

How Long Does Prior Approval Take?

Most prior approval decisions are made within 56 days of a valid application being submitted to the local planning authority. If no decision is issued in that time, deemed consent may apply if all rules are met.

Should I Get Planning Advice Before Applying?

Getting planning advice early helps confirm whether your building qualifies under Class Q or Class R, reduces the risk of refusal, and makes the planning or prior approval process more straightforward.