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Best Small Pets for Apartment Living
We’ve chosen six pets below, ordered from most apartment-practical to most caveat-heavy. Every entry includes real cost figures, the trade-offs your landlord cares about, and an honest verdict on who should skip it.
TL;DR
- Best for strict leases: Betta fish. Silent, odor-free, hypoallergenic, no handling required.
- Best low-odor mammal: Gerbils. Desert origins mean minimal urine; active during the day.
- Best for long-term owners: Leopard gecko. Lives 15-20 years, tolerates 8-10 hour absences.
- Most interactive: Budgies. Can learn your name but need a companion if you work full-time.
- Avoid in shared bedrooms: Hamsters. Peak activity 9pm-3am disrupts sleep.
1. Betta Fish: The Apartment Pet That Breaks No Rules
Most “no pets” clauses target dogs and cats. A 5-gallon betta tank is the single pet most likely to be greenlit, or quietly ignored, in a strict building.
A single male betta in a 5-gallon heated tank takes up less floor space than a stack of books. It runs silently, produces no dander, and emits no airborne proteins. That makes it the only fully hypoallergenic pet on this list.
The numbers are friendly too:
- Startup cost: roughly $341 all-in for tank, filter, heater, substrate, and the fish itself ($4 to $40)
- Ongoing two-year cost: around $1,070 (food $5 to $10 per week, plus around $15 per year in meds)
- Tank: 5 gallons minimum, water held at 78 to 80 degrees Fahrenheit
- Apartment-fitness: silent, zero odor, hypoallergenic, tolerates 8 to 10+ hour absences without issue
- Caveat: tanks over 10 gallons are sometimes restricted by landlords. One property manager cited a third-floor tenant whose saltwater tanks caused a floor collapse.
Best for: studio renters, allergy sufferers, 9-to-5 workers, and strict leases.
Skip if: you want a pet you can hold or one that responds to its name.
2. Gerbils: The Low-Odor Mammal Most Renters Have Not Considered
Gerbils are the lowest-odor small mammal you can keep. Their desert origins mean very little urine relative to body size. If you have ever walked into a friend’s flat and smelled their hamster, gerbils are the fix.
They are active during the day, kept in pairs (so they self-entertain while you are at work), and noticeably less likely to bite than hamsters.
What you actually need to know:
- Must be kept in same-sex pairs, with a 10-gallon tank as the minimum per pair
- Diurnal, so their activity syncs with a working renter’s schedule
- Lowest odor of all small mammals (rats, then mice, then hamsters, then guinea pigs, then gerbils)
- Less bite risk than hamsters and easier to handle calmly
- Caveat: known escape artists. One owner documented a gerbil found inside a wall cavity. A clip-down lid is non-negotiable, and screw-top tank lids beat plastic clamps.
- Tolerate 8 to 10 hour absences fine because they have a cage-mate for company
- Burrow heavily, so plan on 4 to 6 inches of substrate and a daily sweep around the cage base
The verdict: gerbils are what most people should buy when they think they want a hamster. Same price range, half the smell, awake when you are.
Looking for a vet for your small pet? Call 01612021518 now.
3. Leopard Gecko: 20 Years of Silent, Allergen-Free Companionship
A leopard gecko bought at 25 could still be alive at 45. No other pet on this list comes close to that timeline.
They are completely silent. They are nocturnal, so they are not in your face when you are home unwinding. And unlike most reptiles, they do not need UV lighting, which keeps the setup simpler and cheaper.
The cost picture:
- Startup: $220 to $1,230 (gecko $30 to $600, enclosure $50 to $250, supplies $75 to $200, first vet visit $50 to $150)
- Monthly ongoing: $15 to $25 for food and supplements
- Annual cost after the first year: $220 to $430
- Lifespan: 15 to 20 years
- Tank: 20-gallon long for an adult, with a warm-side basking spot at 88 to 92 degrees Fahrenheit
- Hypoallergenic: cold-blooded, no dander, no problem proteins
- Tolerates long owner absences well, since adults eat only every two to three days
- Docile and slow-moving, so handling is low-risk for first-time reptile keepers
Honest caveats: they live on insects, so you have to keep crickets or mealworms in your kitchen or a spare cupboard. Exotic vets can be harder to find than a standard small-animal practice, and a single visit often runs $80 to $150.
Best for: renters who hate noise, have allergies, or want a pet that outlasts their next three apartments.
Skip if: live insects make you squeamish.
4. Budgies: The Interactive Apartment Pet (With One Big Caveat)
Budgies are the smallest pet on this list that can learn your name. They are also the loudest. Whether that trade-off works depends entirely on your building.
They bond strongly with owners when kept singly and can mimic words and short sounds. Their vocalizations are pleasant chattering, closer to background birdsong than a screaming parrot.
What apartment renters need to weigh:
- Daytime chatter is constant, not occasional. In thin-walled buildings this becomes a complaint.
- They cannot tolerate 8 to 10 hour alone periods well. They are flock animals. If you work full-time, plan on a second budgie from day one.
- Mess is real: feathers and seed husks scatter daily, so a cage skirt protects your deposit.
- Some landlords restrict birds because anxious budgies scream, and one building added bird limits after complaints.
- Cage size: 18 by 18 by 18 inches minimum, with bar spacing under half an inch.
- Lifespan: 7 to 10 years, longer than any small mammal on this list.
Best for: remote workers, genuine-bonding seekers, and detached or semi-detached buildings.
Skip if: you leave at 8am and return at 6pm, or your building has a history of noise complaints.
5. Guinea Pigs: Vet-Loved, But Bring a Vacuum
Guinea pigs poop over 100 times a day. In a small apartment, that fact alone decides whether they work for you.
They are highly social, daytime active, bond with their owners, and live four to eight years. Wheeking is loud inside the home but rarely travels through closed apartment doors. It is quieter than a barking dog or a vacuum cleaner.
The realities of cage life in a flat:
- Cost: $25 to $50 to purchase, around $75 minimum for a cage, $15 to $40 per month for food, $10 to $25 per bag of bedding
- Minimum cage: 7.5 sq ft for one, 10.5+ sq ft recommended. The largest footprint of any pet on this list.
- Should be kept in pairs, per FOUR PAWS International guidance, which doubles your food and bedding spend
- Daily spot-clean and a full weekly clean are required. Hay escapes the enclosure constantly and ends up across your floor.
- Cannot tolerate 8 to 10 hours alone without enrichment, so a companion pig is non-negotiable for working renters
- Wheeking peaks at feeding time, so consistent meal schedules cut noise dramatically
- A solid-base cage and a HEPA air purifier nearby keep odor manageable in 600 square feet
Direct recommendation: guinea pigs work in apartments if you work from home, have 10+ sq ft of free floor space, and “daily cage cleanup” actually means daily. Otherwise, choose gerbils.
6. Hamster: Cheapest on Paper, Hardest on Your Sleep
Hamsters are the cheapest mammal pet you can buy. They are also nocturnal, with peak activity exactly when you are trying to sleep.
They are a classic starter pet for a reason: solitary, compact 20-gallon tank, lowest annual cost of any mammal at $150 to $300 per year. But in a studio or one-bed flat, wheel running and chewing become a sleep problem inside the first week.
The cost and care snapshot:
- Cost: $150 to $300 per year. Initial setup $100 to $250, monthly $15 to $30.
- Lifespan: 2 to 3 years (the shortest on this list)
- Tolerates 8 to 10 hours alone fine, sleeping right through your workday
- Bite risk if startled or under-handled, especially in the first two weeks after bringing one home
- Mitigation: silent ball-bearing wheel, glass tank rather than plastic, cage on a thick rug, 6+ inches of substrate, and position the cage away from any shared bedroom wall
- Enrichment matters: tunnels, foraging toys, and hidden food reduce wheel time, which is your real noise source
The verdict: if the cage lives in a room separate from where you sleep, hamsters are a fine cheap starter pet. If your bedroom is also your living room, pick a gerbil pair or a betta instead. Honest call.
Frequently asked questions
Often yes, with written permission. Most no-pets clauses target dogs and cats; caged animals (fish, hamsters, geckos) are commonly approved on request. Write to your landlord with the species, enclosure size, location in the apartment, and how you will handle odor and noise. Offer a pet addendum or extra refundable deposit. Get the approval in writing before the pet arrives. Unauthorized animals risk eviction and your deposit.
Betta fish, hamsters, leopard geckos, and gerbil pairs handle full workdays without issue. Avoid budgies, single guinea pigs, and rats. They are social species that develop stress behaviours when left alone all day without enrichment. If you work a standard 9-to-5 and want a mammal, gerbils kept in a pair are your best practical option, since their cage-mate covers the social need.
Gerbils, ranked lowest of all small mammals because their desert origins mean minimal urine. Fish, leopard geckos, and other reptiles produce no detectable odor when properly maintained. Worst offenders are rats and mice; hamsters fall in the middle. All small-mammal odor is primarily a function of cleaning frequency, so weekly cage cleans matter more than species choice for most owners.
Hamsters, at £100 to £200 per year all-in. Betta fish have a higher startup ($341) but very low ongoing costs once the tank is running. Leopard geckos cost more upfront, but spread across their 15-to-20-year lifespan they become the lowest annual cost per year of any pet here. Gerbils and guinea pigs sit in the mid-range for both startup and ongoing spend.
No. Hamsters are strictly nocturnal, and wheel running, chewing, and rustling all peak during your sleep hours. A silent ball-bearing wheel, deep substrate, and a rug under the cage help take the edge off. If the cage has to share your bedroom, choose a daytime-active gerbil pair or a fully silent betta instead.
Veterinary Advice Disclaimer
The information provided in this article is intended for general guidance only and should not be used as a substitute for professional veterinary advice. Every pet is different, and symptoms can vary depending on individual circumstances. If you have any concerns about your pet’s health or wellbeing, please contact your vet for a proper assessment and personalised care.