Self storage in an industrial building: the use class question

Self storage is normally a Class B8 storage or distribution use. That is the starting point for any application, and it is the answer most councils accept, because the activity is the storage of goods even though the people bringing the goods are members of the public rather than employees of one business.

Where the self storage use class argument gets interesting is at the edges. A trade counter selling boxes and tape is one thing. Van hire from the same yard is another, and it is a separate sui generis use. And a unit that lets customers work inside their storage room, take deliveries there and trade from it has drifted a long way from storage.

Why self storage sits in Class B8

The Use Classes Order 1987, as amended, defines Class B8 as use for storage or as a distribution centre. Nothing in it requires the goods to belong to the occupier of the building, and nothing excludes public access. On the facts of a conventional self storage operation, goods are placed in a secure room and left there, which is storage.

Councils occasionally argue that frequent visits by members of the public make the use closer to retail, or make it sui generis. That argument is worth taking seriously where the model involves a shop front, a substantial sales area or regular trading from the units, and it is weak where the customer visits are simply access to stored goods.

Getting the description of development right matters more than winning a categorisation debate. Use of the building for self storage (Class B8), with an ancillary reception and sales of packaging materials, tells the council what you are doing and gives it something to condition.

Reception, offices and ancillary sales

Three ancillary elements are normal and rarely contentious on their own: a reception and customer waiting area, a small office for the site team, and the sale of boxes, tape and padlocks to customers.

Each stays ancillary while it is subordinate in scale and tied to the main use. A packaging sales area the size of a small shop, visible from the road and open to passing trade, is a retail element, and where the site is outside a defined centre that raises the sequential test for retail development. Where a significant sales element is proposed, a Retail Impact Assessment or a retail sequential test may be asked for, which is a large piece of work to trigger by accident.

Van hire is the one to watch. Hiring vehicles is a sui generis use, so a self storage operation that offers van hire is running a mixed use and needs permission for it. Some operators avoid the issue by arranging hire through a third party off site, which is a commercial decision rather than a planning one, but it keeps the application simple.

The employment land objection

The objection you should expect is not about the use class. It is about jobs.

Local plans commonly protect designated employment land and resist changes that reduce its capacity to provide employment. Self storage generates very few jobs for the floor area it occupies, typically a handful of staff for a building that might have employed dozens in manufacturing. Where the site sits in an allocated employment area, a policy officer will raise job density, and where the building is currently in general industrial use the loss of that capacity is a planning objection in its own right.

Answer it with evidence rather than assertion.

• Marketing evidence for the existing use, showing the period, the agent, the asking terms and the level of interest, where the building has stood empty.
• The physical constraints of the building, such as eaves height, floor loading, column spacing, yard depth and access, that make it unsuitable for modern industrial occupiers.
• The employment the proposal does generate, counted honestly, including maintenance, security and delivery activity.
• The contribution the use makes to small businesses that store stock there, which is a real economic function and is often overlooked.
• Any enabling investment, such as roof and cladding replacement, that keeps the building in use rather than letting it decay.

An Employment Land Assessment is the report type that carries this argument, and on a designated site it is usually the document that decides the application.

Vehicle movements and the yard

Self storage trip generation is unusual. It is low in absolute terms, weighted towards weekends and evenings, and dominated by cars, small vans and the occasional box van. That profile is often better for the highway network than the industrial use it replaces, which is a point worth making with numbers from a recognised trip rate database rather than in general terms.

The yard matters more than the trip count. Show on the layout:

1. The swept path of the largest vehicle expected, including any lorry used for deliveries of new stock or for the initial fit out.
2. Customer parking adjacent to the loading doors, because customers will unload where they can reach and not where you drew the bay.
3. Trolley routes from the parking area to the goods lift or door, level and under cover if possible.
4. Where a queue forms when two customers arrive at the same loading bay.
5. Turning provision that does not rely on reversing across a pedestrian route.

A Transport Statement is normally proportionate for a single building conversion, with a full assessment reserved for larger schemes or sites with constrained access.

Hours of customer access

Operators want 24 hour access, and it is a real commercial advantage. Councils grant it readily on a wholly industrial estate with no nearby housing, and resist it where residential windows face the yard.

The noise sources are specific and easy to describe: roller shutter doors, the goods lift, trolleys on tarmac, car doors and engines late at night, and the beep of a reversing van. None of these is loud in absolute terms. All of them are intrusive at 2am in a quiet street.

Where housing is close, expect a condition limiting customer access hours, and consider offering restricted night access via a personnel door rather than the main shutter as a compromise. A Noise Impact Assessment should identify the specific sources and the receptor windows rather than presenting a general background survey, and its author should be suitably qualified because the council will scrutinise the methodology.

Fire, compartmentation and escape

Self storage carries a particular fire risk because the operator does not always know what is inside each unit and the building contains large volumes of combustible material in a partitioned layout. That is a building regulations and fire safety matter rather than a planning one, but three aspects reach the planning application.

Access for fire appliances and the position of hydrants or a water supply, which appear on the site layout.

Any external alterations needed for escape, such as new doors, external stairs or openings, which need permission in their own right and change the elevations.

Sprinkler tanks and pump houses, which are structures that need to be shown and located sensibly rather than added later in a corner of the yard.

Where a fire engineering strategy is needed, a Fire Safety Strategy prepared to BS 9999 is a fire engineering document and requires a competent professional. An AI-assisted draft can structure it and set out the policy and site context, and the engineer takes it from there.

The application pack

For a conversion of an existing industrial building to self storage, the pack is usually a planning statement, a transport statement with the yard layout and swept paths, an employment land justification with marketing evidence, a noise position where housing is nearby, a lighting position for a site operating after dark, and elevations showing any external alterations and signage.

Signage is the detail most often forgotten. Corporate signage on a large building frequently needs advertisement consent separately from the planning permission, and a bright illuminated sign facing housing generates objections that have nothing to do with the storage use. A co-working conversion raises a comparable set of questions about intensity and hours, as our note on co-working space in a former office building explains.

PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval. For specialist technical reports, qualified professional input may be required. This is general guidance rather than legal advice, so confirm the use class position and any permitted development rights with your local planning authority before you commit to a lease.