A common house gecko in a multi-pet home lives or dies by its enclosure, and that is not melodrama. This is a small, soft, quick lizard that every other animal in a typical household is equipped to harm: cats are specialist hunters of exactly this prey, dogs chase anything that darts, and most larger pet reptiles would eat a house gecko without hesitation. The gecko itself is perfectly happy in total isolation, hunting insects in a warm, planted tank and ignoring the rest of the household completely. Your task is simply to make that isolation structural rather than hoped for, so safety does not depend on anyone remembering a rule on a busy day.
The Cat Problem, Specifically
Cats deserve their own paragraph because the house gecko is, in size and movement, the precise animal cats evolved to catch. A cat does not need to breach the enclosure to do harm. Hours of staring, pouncing at the glass, and sleeping on the warm lid teach the gecko that it lives under permanent siege, and it responds by hiding through its active hours and feeding poorly. One successful lid flex or forgotten latch usually ends the story outright. So the enclosure belongs in a room the cat is genuinely excluded from, not a room where the cat is usually uninterested, and the lid should be fine mesh with latches, inspected whenever it is opened, because this gecko probes gaps with professional dedication. If no cat-free room exists, the honest answer is that this is not the right pet for the household right now.
No Tankmates of Any Kind
House geckos should not share an enclosure with other species, including frogs, anoles, or other small lizards that beginners sometimes imagine as a community. The house gecko may be eaten, may outcompete shyer species for the small insects both need, or may simply stress and be stressed by constant close encounters neither animal can escape. Even its own kind needs judgment: males can clash, and a group needs space, multiple feeding points, and dense cover to stay peaceful. A single house gecko, or a carefully watched same-species group in a generously planted tank, behaves far more naturally than any mixture. One species per enclosure also keeps temperature, humidity, and feeding targeted instead of averaged into compromises that suit nobody in the tank.
Escape-Proofing as a Daily Discipline
Every feeding and misting session happens with the room door closed and other pets out, and the lid is opened the minimum amount for the minimum time, because this gecko's escape speed is its defining talent. Check mesh for tears, confirm cable openings are sealed, and keep a soft cup ready for guiding a loose gecko rather than grabbing. Position the enclosure away from the dog's routes and off any surface a jumping cat uses as a launchpad. These habits sound fussy for the first week and automatic by the second, which is the point: routine, not vigilance, is what keeps tiny animals safe for years. If the gecko is ever rehomed, KinsLe Transferrable Profiles transfers its enclosure specifications, feeding routine, and escape history in its profile, so its next keeper starts with the same discipline already written down.