Shipping containers and storage pods in a garden

Putting a shipping container in a garden usually does need planning permission or needs to fit within permitted development, and the deciding question is how long it stays and how fixed it becomes rather than what it is called. A 20 foot box craned onto a level base and left there for years is treated as a building. The same box standing in a yard for three weeks while a loft is cleared out is not. Between those two positions sits a test the courts have applied for decades, and householders asking about shipping container garden planning permission usually land somewhere in the middle of it.

Whether placing a container counts as development

Development is defined in section 55 of the Town and Country Planning Act 1990 as the carrying out of building, engineering, mining or other operations, or the making of a material change of use. Building operations include the erection of a building, and "building" is defined widely in section 336 to include any structure or erection.

A container that is simply delivered and set down has not been erected in the ordinary sense. That is the argument people reach for, and sometimes it works. But the courts have been clear that a prefabricated structure placed on land can still be a building, and that the lack of foundations is one factor among several rather than an answer in itself.

The practical consequence is that nobody can tell you from a photograph whether your container needs permission. They can tell you which questions the council will ask.

The test the council will apply

Three criteria come from the rating case law and have been applied in planning ever since, most prominently in the Court of Appeal's decision in Skerritts of Nottingham, which concerned a marquee put up for part of each year and still held to be a building.

• Size. A domestic bike store is a different proposition from a 40 foot high cube.
• Permanence. How long the structure stays, and whether it is there year round.
• Degree of physical attachment. Bolted down, bedded on a concrete pad, connected to power and drainage, or standing free on sleepers.

No single factor decides it. A large container left in place indefinitely will be a building even with no fixings at all, because size and permanence carry the weight. A small pod, moved several times a year, used seasonally and standing on grass, has a reasonable case for not being one.

Services are the giveaway. Once a container has a consumer unit, a light and a socket fed from the house, arguing for impermanence gets hard.

If it is a building, Class E is the starting point

Assuming the container is a building, the right question is whether Class E of Part 1 of Schedule 2 to the General Permitted Development Order 2015 covers it. Class E permits buildings and enclosures within the curtilage of a dwellinghouse required for a purpose incidental to the enjoyment of the dwellinghouse. A storage container used for garden tools, bikes and household overflow fits that description.

The limits then apply in full, and they are the same limits that catch garden rooms and sheds.

The height limit is the one that bites. A 2.6 metre container sitting on timber bearers or a 150mm slab is over 2.5 metres measured from the ground level next to it, so placing it within 2 metres of the boundary takes it outside Class E even though a shed of the same footprint would be fine. Shifting it two and a half metres off the fence is often the whole solution. The fifty per cent curtilage test under Class E matters more on small plots, where a container plus a shed plus a driveway can get close to the threshold faster than people expect.

Incidental use, and why business storage fails

Class E only covers a purpose incidental to the enjoyment of the dwellinghouse as such. That phrase does real work. Garden equipment, a workshop for hobby use, bikes, camping gear, firewood. All comfortably incidental.

Storing stock for a trade is not. Nor is storing tools and materials for a building business run from the address, and nor is using the container as a workspace with staff or customers coming to it. Those uses go beyond what is incidental and become either a separate use needing permission or a material change of use of part of the garden. The meaning of incidental to the enjoyment of a dwellinghouse repays a careful read before you rely on the class, because the test is about the relationship with the dwelling rather than about whether the activity is quiet.

Sleeping accommodation is firmly outside it. A container fitted out as a bedroom or a self-contained annexe is not incidental, whatever the label on the planning portal description.

Containers on a driveway or forward of the house

A container on the front drive is outside Class E because of the principal elevation restriction, so it needs planning permission as a building. Even where the structure is temporary enough not to be a building at all, two other things can still catch it.

The first is a material change of use of the front garden, which is arguable if the container is there permanently and dominates the space. The second is the hard surface itself, since laying or replacing a drive to carry the load engages Class F, and the drainage condition attached to hard surfaces under Class F applies where the area exceeds five square metres.

Visibility at the access and obstruction of the footway are also live issues if the container sits near the pavement, and the highway authority can act separately from the planning department.

Conservation areas and other designated land

On designated land, meaning conservation areas, National Landscapes, National Parks, the Broads and World Heritage Sites, Class E is cut back in two ways that matter for containers.

A building cannot be sited on land between a side elevation of the house and the boundary. And where the structure sits more than 20 metres from any wall of the house, the total ground area covered by buildings in that part of the garden is limited to 10 square metres, which a single 20 foot container very nearly uses up on its own.

Article 4 directions are the other thing to check. Some authorities have removed Class E rights in particular conservation areas, and where that has happened an application is needed whatever the dimensions. The council's planning policy pages list directions in force.

Confirming the position rather than guessing

Because the building question turns on facts about permanence and attachment, the only formal way to settle it is a lawful development certificate. Section 192 of the Town and Country Planning Act 1990 allows an application for a certificate of lawfulness of proposed use or development, which tells you in advance whether what you intend is lawful without permission.

That is the route to take where the container is expensive, where a neighbour has already complained, or where you need certainty for a mortgage or a sale. It attracts a fee and takes the normal eight weeks, and it produces a document that binds the authority on the facts described.

If a container has already been in place for years, the immunity periods are relevant instead. The Levelling-up and Regeneration Act 2023 moved the time limit for enforcement against operational development in England towards a single ten year period for England, and the date that change took effect should be checked against the current position before relying on it.

A short Planning Statement explaining the incidental use, the dimensions and the relationship to the boundary is often all a householder application needs here. Enter your postcode on PlanScope to see whether your plot carries a designation that changes the answer.

This is general guidance, not legal advice. A lawful development certificate is the only formal way to confirm that works are lawful, so check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.