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A hamster spends almost its whole life in its enclosure, so getting the setup right matters more than any toy or treat. The good news: once you know the basics, it’s simple. This guide brings together everything you need to set up a hamster cage, based on current UK animal welfare guidance from charities such as PDSA, Blue Cross and Wood Green.

Quick checklist

• At least 100 x 50 cm of unbroken floor space, for every species
• At least 20 cm of bedding in part of the enclosure
• A solid wheel: 28 cm+ for Syrians, 20–25 cm for dwarfs
• At least two hides, a few tunnels and a sand bath
• Fresh water every day, a heavy food bowl and plenty to chew
• One hamster per enclosure

1. Choose an enclosure that’s big enough

Size matters more than anything else. Wild hamsters cover several kilometres a night, and cramped cages are linked to stress behaviours like bar biting and climbing. UK charities recommend at least 100 x 50 cm of unbroken floor space for all hamster species, dwarfs included. Shelves and extra levels don’t count, and bigger is always better.

Many shop cages sold as “large” are far smaller, so always check the base dimensions before you buy. The main options:

• Wire cages with a deep base: good ventilation and easy access. Look for bar spacing of about 1 cm or less for Syrians, narrower for dwarfs.
• Glass tanks or converted glass cabinets: escape-proof and great for deep bedding. They need a mesh lid for airflow.
• Bin cages and DIY enclosures: a large storage box or piece of furniture with mesh panels. The most affordable way to reach the recommended size.
• Modular tube cages: they look fun, but they are usually far too small and hard to clean. Avoid them as a main home.

Hamsters are burrowers and poor climbers, so choose floor space over height. A low platform adds interest, but keep drops under about 20 cm.

2. Add deep bedding for burrowing

In the wild, hamsters live underground in burrows with separate rooms for sleeping, storing food and toileting. Deep bedding lets them do the same, and it’s one of the biggest things you can do for their wellbeing.

• Depth: at least 20 cm in at least part of the enclosure. Deeper is better.
• Type: unscented paper bedding holds tunnels well. Aspen shavings are a good addition. Avoid pine and cedar shavings, which contain aromatic oils.
• Nesting material: plain paper strips, unscented tissue or hay. Avoid fluffy “hamster wool”, which can wrap around legs or cause blockages if swallowed.

3. Pick the right wheel

A wheel is essential, and size is what matters. Your hamster’s back should stay straight while running; a wheel that is too small forces it to arch and can cause spinal problems over time.

• Syrian hamsters: at least 28 cm (11 in).
• Dwarf hamsters: 20–25 cm (8–10 in).
• Running surface: solid, never wire rungs or mesh.

Wheels that come with cages are often too small. For more detail, see how to choose the best exercise wheel for your hamster.

4. Hides, tunnels and a sand bath

• Hides: at least two, such as a wooden or ceramic house and a coconut hut. Hamsters feel safest with somewhere dark to retreat.
• Tunnels: cork, cardboard or wooden tunnels, partly buried in the bedding.
• Sand bath: a shallow dish of plain, dust-free sand (not chinchilla dust). Hamsters roll in it to clean their coat, and many use it as a toilet too.
• Digging boxes: a box of a different substrate, such as coco soil or hay, adds variety.

5. Food, water and things to chew

• Food: a good hamster mix as the base, plus small amounts of fresh vegetables and occasional protein like boiled egg or mealworms. Scatter some of it around the enclosure so your hamster can forage.
• Bowl: heavy ceramic, so it doesn’t tip.
• Water: fresh every day in a bottle, a small heavy bowl, or both.
• Chews: untreated wooden chews, apple sticks and hay to keep ever-growing teeth in check.

Read more about what hamsters should eat, safe plants and herbs and food puzzles for enrichment.

6. Lay it out like a hamster would

• Put the deepest bedding and main hide in the quietest corner.
• Place the wheel on a flat, stable spot where it won’t sink or wobble.
• Keep food and water away from the sand bath or toilet corner.
• Fill the gaps with tunnels, chews and scattered food, and rotate a few items every week or two.
• Keep the enclosure in a quiet room away from draughts, radiators and direct sunlight.

7. Keep it clean without stressing your hamster

Hamsters rely on familiar smells and their hidden food stores to feel safe, so little and often is best: spot clean the toilet area every day or two, wash bowls weekly, and only replace part of the bedding when needed. Leave the nest and food stash alone unless food is going off. Full details are in how often to clean your hamster’s cage.

Common mistakes to avoid

• Buying a small starter cage “for now”.
• Keeping the wheel that came with the cage.
• Using only a thin layer of bedding.
• Housing two hamsters together. They are solitary and can fight seriously.
• Deep cleaning the whole cage every week.

Next steps

Once the enclosure is ready, give your new hamster a few quiet days to settle in, then start taming it step by step. You can find a full list of extras in essential accessories for a new hamster, and signs to watch for in common hamster health problems.