Permission first, in writing
Before any animal arrives, get the landlord's or agent's agreement in writing, naming the species and the enclosure type. A vague assurance that small pets are fine leaves you exposed when one bearded dragon becomes a small collection; a named agreement protects you both. If permission is refused for anything aquatic, respect the distinction — many landlords object to large volumes of water, not to reptiles — and choose a dry-setup species instead of arguing. Keep the agreement with your tenancy papers, and offer a brief written summary of the setup alongside it: sealed enclosure, thermostat-controlled heat, no alterations needed.
Setups that need no alterations
Renter-friendly reptile keeping is freestanding by design. Enclosures sit on their own stands or on sturdy existing furniture; heat comes from thermostat-controlled mats or ceramic heaters in proper holders rather than anything fixed to a wall; lamps clamp on or stand rather than screw in. Lighting rigs on freestanding frames give you a full day-night cycle without a single hole drilled. Choose species whose adult housing is genuinely portable, too — a gecko or small snake enclosure you can move carefully when the tenancy ends beats a wall-length build you must dismantle and make good around.
Safety and containment a landlord cares about
The landlord's real concerns are fire, water and escapes, and each has a tidy answer. Every heat source runs through a thermostat, cables stay off the floor and out of walkways, and the room's smoke alarm stays in working order as it should in any home. Any water feature sits over a leak tray, and enclosures holding water stay modest in volume. Lids clip or lock shut, vents are secure, and feeder insects live in escape-proof tubs rather than anything that can tip. None of this is special rental behaviour — it is good practice anywhere, and in a rental it doubles as your inspection-day evidence.
Being the tenant who gets a yes next time
Keep enclosures clean and odour-free, bedding changed on schedule, and the area around the setup as tidy as the setup itself. At inspections, a calm, documented, clearly contained collection changes the conversation from risk to responsibility, and a good reference from this landlord is the easiest route to the next one's permission. When you eventually move, the same tidy record shows exactly what was kept and the condition everything was kept in, which protects your deposit as well as your reputation.
A KinsLe Pet Passport for each reptile — species, setup, vet and feeding records in one packet — makes that conversation simple, because you can show a landlord exactly what you keep and how well it is kept.