Every self storage contract carries a prohibited items list, and it is longer than most people expect. Anything flammable, explosive, perishable, living, illegal or hazardous is out, and so are several things that seem harmless: petrol in a mower, a gas bottle for a barbecue, tinned food, and in most cases anything you intend to run a business from inside the unit.
The rules are not arbitrary. Storage facilities are large buildings full of other people’s belongings behind locked doors that nobody opens for months, which makes fire, leaks and pests the three risks the whole industry is built around preventing.
Summary: No fuel, gas, paint, solvents, fireworks, ammunition, chemicals, food, plants, animals, or anything illegal, and no living in the unit. No unregistered vehicles unless the site specifically offers vehicle storage. Read the contract, because breaching it can void your insurance and give the operator grounds to terminate. There is no single statute governing self storage in the UK, so the terms you sign do most of the work, and the Self Storage Association UK, the trade body covering most of the industry, sets the standards its members work to.
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The standard prohibited list
| Category | Examples | Why it is excluded |
|---|---|---|
| Flammable liquids and fuels | Petrol, diesel, paraffin, white spirit, lighter fluid | Fire risk, and vapour accumulates in a sealed space |
| Gas and pressurised containers | Patio gas, camping gas, propane, aerosols in quantity | Explosion risk in a fire |
| Chemicals and hazardous waste | Paint, solvents, weedkiller, pool chemicals, asbestos | Fumes, leaks and contamination |
| Explosives and weapons | Fireworks, ammunition, firearms | Legal restrictions and safety |
| Food and perishables | Tinned and dry food, pet food, open packets | Attracts rodents and insects |
| Living things | Plants, animals, anything alive | Welfare, and pests |
| Waste | Rubbish awaiting disposal | Storage is not a waste transfer site |
| Illegal or stolen goods | Anything unlawful to possess | Self-evident |
| Habitation | Sleeping or living in the unit | Prohibited outright, and unsafe |
The food category catches people most often, because tinned goods feel entirely stable. The problem is not spoilage but attraction: rodents can smell food through packaging, and one unit with a box of tins can bring pests into a building housing hundreds of other customers’ belongings.
Fuel is the other everyday one. A lawnmower, a strimmer, a chainsaw or a generator with fuel in the tank is a prohibited item, though the same machine drained and run dry is usually acceptable. Drain it, run it until it stops, and mention it when you book. HSE guidance on storing petrol safely explains why it is treated so seriously: petrol gives off vapour that ignites easily, which is precisely the wrong property in a sealed room nobody opens for months.
Aerosols sit awkwardly and are worth a separate mention. A single can of deodorant in a box of toiletries is not what any contract is aimed at, but a crate of paint spray, lubricant and hairspray from a garage clear-out is a quantity of pressurised flammable product that most operators would refuse. Quantity is what changes the answer.
The items that are allowed but should not be
Plenty of things are contractually permitted and still a bad idea. Unheated units go through a full UK winter and summer, and anything sensitive to damp, temperature swing or condensation will suffer over several months even in a good facility.
- Musical instruments. Wooden instruments in particular react badly to humidity swings. Climate-controlled storage or a friend’s spare room.
- Vinyl records and photographs. Warp and stick respectively. Both are effectively irreplaceable.
- Artwork and canvases. Humidity causes cockling and mould, and canvas is unforgiving.
- Electronics and batteries. Condensation on cold circuit boards, and lithium cells degrade in temperature extremes.
- Wine. Needs stable temperature. Storage units do not provide it.
- Important documents. Passports, deeds, certificates. Keep these with you, always.
- Anything of high sentimental value. Insurance limits per item are often lower than people assume.
Climate-controlled units exist for exactly this and cost meaningfully more. For most household contents they are unnecessary; for instruments, artwork and anything genuinely irreplaceable, the premium is the point.
Where a standard unit is what you have, mitigate. Keep everything off the floor on pallets or battens, leave a gap between contents and the external walls, use rigid plastic boxes rather than cardboard for anything vulnerable, and avoid sealing damp items into plastic where condensation has nowhere to go.
Insurance, and what you are actually obliged to buy
Operators require cover, but that is a contractual condition rather than a legal one, and you usually have a choice of insurer. Which? guidance on self storage reports that you are not legally required to insure goods in storage, that the trade body confirms an operator may refuse your business if you do not, and that an operator insisting you take its own policy would be in contravention of the Financial Conduct Authority.
That distinction is worth knowing at the counter, because in-house cover is offered at the point of signing when you are least inclined to shop around. Ask whether your existing home contents policy extends to goods stored away from home, get the limit in writing, and compare a specialist storage policy before defaulting to the one on the desk.
Whichever route you take, per-item limits are the thing that catches people. A policy can cover a unit for a healthy total and still cap any single item well below what it is worth, which is exactly the situation where an undeclared valuable comes up short. Declare high-value contents rather than assuming. Our guide to self storage insurance sets out what is and is not covered.
The trade body also recommends visiting your unit about once a month. That sounds like housekeeping and is really damage limitation: leaks, damp and pests from a neighbouring unit are all things you want to find in week three rather than month nine.
What breaching the contract actually means
Operators can also sell uncollected goods to recover what they are owed, and this is a real legal route rather than a bluff. Schedule 1 of the Torts (Interference with Goods) Act 1977, which deals expressly with storage and warehousing, lets a bailee sell goods after serving proper written notice and waiting a reasonable period, accounting to the owner for the proceeds less its reasonable charges.
It is a notice-driven process rather than the instant auction television suggests, and operators rarely make money from it. But abandoning a unit does not end the arrangement, and the debt continues to build while the notices are being served.
The more common consequence of a breach is insurance. If a prohibited item causes or contributes to a loss, cover is likely to be void, and the operator may hold you responsible for damage to the building and to other customers’ goods. That last point is the one worth taking seriously: a fire that starts in your unit and spreads is not just your loss.
Contracts also generally give the operator a right of access in defined circumstances, including where they reasonably suspect prohibited items, where there is a safety emergency, or where they are required to by the police or another authority. You are not renting a private space nobody can enter; you are renting a unit under terms.
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Vehicles, business stock and the grey areas
Motorbikes, classic cars and caravans can often be stored, but only at sites offering vehicle storage and usually only if taxed, insured and drained of fuel. A standard household unit is not a garage and most contracts say so explicitly.
Where vehicle storage is offered, expect conditions: fuel drained or minimal, battery disconnected, no work carried out on site, and proof of ownership. Sites that permit it are set up for it with appropriate ventilation and fire measures.
Business use is the other grey area. Storing stock is usually fine and often actively marketed. Running a business from the unit, meaning customers visiting, goods being packed and dispatched, or any activity taking place inside, generally is not. The distinction is between storage and operation, and contracts draw it clearly.
Business customers should confirm separately that their own commercial insurance covers stock held off-site, since a business policy written around a shop or a workshop will not necessarily follow the goods into a rented unit.
Tools and equipment sit in between. A domestic toolkit is fine. A trade van’s worth of power tools may be fine but is a theft target, and per-item insurance limits become relevant quickly.
Preparing what is allowed so it survives
Appliances need draining before storage, and this is the most common cause of damage inside a unit. Residual water in a washing machine or dishwasher will leak, smell and eventually breed mould in a sealed space over months.
- Washing machines and dishwashers. Drain fully, run a hot cycle first, then leave the door slightly open.
- Fridges and freezers. Defrost completely, dry the interior, and store with the door ajar. A sealed empty fridge grows mould reliably.
- Upholstery and mattresses. Cover, but with breathable covers rather than sealed plastic, which traps condensation against the fabric.
- Wooden furniture. Off the floor on battens, away from external walls, and not wrapped tightly in plastic.
- Books and paper. Rigid boxes rather than cardboard, and never directly on a concrete floor.
- Anything with a battery. Remove it. Cells leak over months and destroy the contacts.
The breathable covering point runs counter to instinct. Sealing furniture in plastic feels protective and creates a sealed environment where any moisture already present has nowhere to go, which is considerably worse than leaving it uncovered.
Cardboard is the other quiet problem. Corrugated board softens and slumps in an unheated unit over months, and a stack that was square in June leans by October. Reusable crates hold their shape and stack squarely, which is why we bring them to moves that end in storage rather than boxes. If you are packing yourself, we also supply packing boxes and materials on their own, and rigid plastic boxes are worth the extra for anything going into a unit for more than a few weeks.
Where the excluded items should go instead
The practical problem for someone moving is not understanding the rule but knowing what to do with the things it excludes, so here is each common category mapped to its actual destination.
| Item | Where it should go | Notes |
|---|---|---|
| Petrol and diesel in cans | Recycling centre, ring ahead | Many sites restrict quantities |
| Gas bottles | Back to the supplier or a stockist | Often a refundable deposit |
| Paint and solvents | Harden water-based, take the rest to a recycling centre | See our paint guide |
| Batteries | Supermarket or DIY collection point | Free, and widely provided |
| Tinned and dry food | Food bank if in date, otherwise general waste | Check date and packaging condition |
| Plants | Give away, or move them with you | They will not survive storage |
| Documents and valuables | Keep with you | Never in a unit or a removal van |
Two things follow from that table. Almost everything on the prohibited list is also excluded from removal vans, because the same fire and safety logic applies in transit. Anyone planning storage as part of a move therefore has one clear-out to do rather than two, and it should happen before the van is booked rather than on the day.
The food category also has an easy answer people miss. In-date tinned and dry goods go to a food bank, which solves the disposal problem and does some good, and most accept donations at supermarket collection points. Our guides to paint disposal, battery disposal and clearing the loft cover the categories in detail.
If the pile of excluded items is larger than a car boot, that is what our disposal and clearance service is for. It can be quoted alongside the move, which saves arranging a separate trip for the things a unit will not take.
Prohibited lists vary between operators, so treat this as the common position and read your own contract.
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A note on declaring what you are storing. Contracts commonly require you to confirm the contents and to notify the operator about anything unusual or high value. Doing so is in your interest as much as theirs, given the per-item limits described above.
Photograph the unit once loaded and keep an inventory. It costs ten minutes, it makes any claim straightforward, and it saves emptying half the unit six months later to find one box.
When storage is the wrong solution entirely
If most of what you want to store is on the prohibited list, or is too sensitive for an unheated unit, the problem is not finding the right facility. It is that these items need dealing with rather than deferring.
Garage and shed contents are the clearest example. A typical garage clear-out produces fuel, paint, chemicals, gas and old tins, and almost none of it can go into storage. Booking a unit for the garage means booking a unit for the three boxes that are actually permitted.
Similarly, if the reason for storing something is that you cannot decide about it, a unit converts an indecision into a monthly bill with no end date. That is the most expensive version of storage there is, and it is common enough that the industry quietly depends on it.
Where the contents are genuinely valuable and genuinely sensitive, specialist storage exists for artwork, wine and documents, at prices that reflect the controlled environment. That is the right answer for those things rather than a standard unit with a dehumidifier hope attached.
For everything else, our guides to storage unit costs and unit sizes cover choosing the right space.
Read the contract before signing rather than after. Prohibited items, notice periods, access hours, insurance requirements and the operator’s rights are all in there, and storage agreements are among the documents people sign fastest and read least. Ten minutes at the counter avoids most of the problems described here.
How EcoGreen Movers handles this
We raise the excluded items at the quoting stage, because the same list applies to what can travel in the van and finding a jerrycan in a garage on moving morning helps nobody. EcoGreen Movers offers storage and packing alongside residential moves nationwide, serving Edinburgh, Manchester and London.
If a move into storage is what you are planning, our Premium service covers professional packing to your specification and dismantling and reassembly at both ends, which matters more than usual when furniture is going into a unit and coming out months later. Standard Plus covers the dismantling without the packing. And if you only want materials, boxes are available on their own. Get in touch for a quote covering the move, the storage and anything being cleared.
If in doubt about a specific item, ask the site manager before you arrive rather than at the door with a loaded van. They deal with the question constantly, the answer takes seconds, and it avoids the situation where something has to go back in the car with nowhere to take it. Sites vary more than the standard list suggests, particularly on vehicles, business stock and quantities of aerosols or cleaning products, so a local answer beats a general one.
Frequently asked questions
Can I store a lawnmower?
Usually yes, provided the fuel tank is completely drained and the machine has been run until it stops. Fuel is prohibited, the machine is not. Mention it when booking, since some sites want the spark plug removed or the battery disconnected.
Why is food not allowed?
Because it attracts rodents and insects, and pests in one unit become a problem for a whole building. This applies to tinned and sealed food as well as open packets, since animals detect it through packaging. In-date items are better donated to a food bank.
Do I have to buy the storage company’s insurance?
No. Which? reports that you are not legally required to insure goods in storage, though the trade body confirms an operator can refuse your business if you do not. You can normally arrange your own cover instead, and Which? notes that an operator insisting you use its policy would be in contravention of the Financial Conduct Authority, which regulates insurance in the UK.
What happens if I store something prohibited?
Most likely your insurance is void if it contributes to a loss, and the operator may terminate the agreement. If a prohibited item causes damage to the building or other customers’ goods, you may be held liable for that too.
Can a storage company sell my belongings?
In defined circumstances, yes. Schedule 1 of the Torts (Interference with Goods) Act 1977 gives a storage operator a route to sell uncollected goods once proper written notice has been served and a reasonable period has passed, accounting to you for the proceeds less its reasonable charges. It is a notice-driven process rather than an instant auction.
Can I store a car or motorbike?
Only at sites offering vehicle storage specifically, and usually with conditions: taxed and insured, fuel drained or minimal, battery disconnected, and no work carried out on site. A standard household unit is not a garage.
In summary: read the list before you pack
Nothing flammable, pressurised, chemical, edible, living or illegal, no fuel left in machinery, and nobody living in the unit. Beyond the contract, keep documents, valuables, instruments, artwork and anything irreplaceable out of an unheated unit regardless of whether it is permitted.
Deal with the excluded items before the move rather than at the door of the unit, since almost all of them are barred from the removal van too. One clear-out, done early, covers both. And check the insurance position before you sign, because cover is a condition of the contract rather than a legal duty, and the choice of insurer is usually yours.
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