Best Outdoor Cat Enclosures & Catios (Window, Walk-In, Playpen)

Indoor cats love fresh air and something to watch. A catio, or outdoor cat enclosure, gives them both without the risks of roaming free. Pinterest is full of DIY window catio projects, but there are also ready-made kits that go up in an afternoon.

This guide compares window catios, walk-in catios, and portable playpens, then covers weatherproofing, latches that keep clever cats inside, and a safety checklist if you build your own. Then come five enclosures cat owners buy.

Short version: FunXplore is a walk-in catio with five access doors that can connect to a window. Ketive’s window box is the compact way to start. Aivituvin and PawHut are big walk-ins for multi-cat homes. The Pawtenda tent is the portable playpen option.

Window vs. Walk-In vs. Playpen

Window catios mount outside a window so your cat can come and go from inside. Ketive’s box fits windows up to 58 inches wide and holds two to four cats. They take little yard space, but you cannot get inside them. Make sure the window opening is sealed around the box, and that window screens cannot be pushed out from inside.

Walk-in catios are freestanding wooden enclosures with a full-height door, so you can step in to clean, feed, or play. Some, like FunXplore and Aivituvin, have panels or openings that connect to a window or pet door. They are the biggest option and the biggest project.

Playpens are portable. A tent like Pawtenda folds down and goes with you. They are the cheapest way to start and easy to bring in at night. Playpens and tents need constant supervision; they are not escape-proof and are not for leaving a cat unattended.

Heat Safety

A clear roof lets sun in and can make a catio much hotter than the air outside. Put the enclosure in partial shade, avoid all-day direct sun in summer, always leave fresh water, and bring your cat in on hot days. Panting, drooling or lethargy in a cat is an emergency; call your vet right away.

Weatherproofing

Look for a covered roof and UV-resistant materials if the catio stays outside. FunXplore and Aivituvin use waterproof roof covers that still let sunlight through. PawHut uses fir wood with a waterproof coating and a 420D anti-UV cover, and Ketive says its window box is waterproof and UV-resistant. Even with a roof, place the enclosure where it gets some shade, and plan to bring cats in during bad weather.

Escape-Proof Latches

Cats learn to paw doors open. Check that every door closes fully and latches, and that the gaps between panels are too small to squeeze through. Ketive’s window box has two lockable doors. On any enclosure, a simple carabiner or padlock clipped through a latch adds a second lock that paws cannot work. Recheck the latches every week, since wood can swell and shift.

DIY Catio Safety Checklist

Building your own? Before your cat moves in, check that:

• The mesh is strong, securely fastened, and has no sharp cut ends facing in.
• There are no gaps at corners, the floor, or around the window, and the window opening is sealed around the catio.
• Doors close and latch on their own, ideally with a second lock.
• The roof is fully covered, so cats cannot climb out and predators cannot get in.
• There is shade, shelter from rain, and a spot for water.
• Plants inside and next to the catio are safe for cats.
• The structure is stable and will not tip or blow over.

When Indoor Enrichment Is Enough

Not every home has room for a catio. A sunny window perch gives a lot of the same bird-watching fun; see our cat window perches guide. Pair it with climbing space and scratching posts to keep an indoor cat busy.

The Picks, Up Close

FunXplore Large Walk-In Catio, 73 in

FunXplore Catio — Check price on Amazon

A walk-in catio for up to six cats, with four platforms, a scratching post, two hideouts, and a climbing bridge. Five access doors let you remove panels to connect it to a window or pet flap. The 69.3-inch front door means you do not have to bend to get in. A waterproof PVC roof blocks rain but lets sunlight through.

Best for: Most homes wanting a walk-in catio that links to the house.

Ketive Expandable Window Box Catio

Ketive Window Box — Check price on Amazon

A three-sided solid wood window box, 68 by 21.2 by 55.5 inches, with four jumping platforms, two lockable doors, and a removable door for a cat tunnel. Ketive says it holds up to 88 pounds and fits windows up to 58 inches wide. Finer mesh keeps bugs out, and it is waterproof and UV-resistant.

Best for: Smaller yards and a first catio.

Aivituvin Window Catio Walk-In Cat House

Aivituvin Window Catio — Check price on Amazon

A large walk-in catio, 104 by 34 by 69.5 inches, that can connect to the inside so cats come and go freely. It has six platforms, two sleeping houses, two scratching posts, two baskets, and a bridge. It is made of fir wood with wire mesh and a waterproof roof cover.

Best for: Multi-cat homes that want a walk-in with window access.

PawHut 110 in Large Walk-In Catio

PawHut Catio — Check price on Amazon

A 110.2 by 73 by 74 inch catio for three to six cats, with two condos, six platforms, and two soft ladders. Fir wood with a waterproof coating and a 420D anti-UV cover. A split door gives full access for cleaning, and a small sliding door connects to cat tunnels. PawHut says it suits cats under 18 pounds.

Best for: The biggest backyard setup.

Pawtenda 6-in-1 Cat Tent & Enclosure

Pawtenda Cat Tent — Check price on Amazon

A foldable outdoor tent with a network of tunnels and hideaways, made from weather-resistant materials. It is lightweight and folds for the backyard, camping, or a picnic. Supervise every minute in a tent playpen; it is not escape-proof and is not for leaving a cat unattended.

Best for: Trying outdoor time on a budget, and travel.

FAQ

Is a catio safe for an indoor cat?

A well-built, fully enclosed catio is much safer than letting a cat roam. Supervise at first and check latches and mesh often.

Can I attach a catio to a window?

Window boxes like Ketive mount outside a window. Walk-ins like FunXplore and Aivituvin have openings that can connect to a window or pet door. Check the fit and the instructions for your window.

Do I need to anchor a catio?

Follow the maker’s instructions. In windy areas, securing a freestanding catio to the ground or a wall helps keep it stable.

What about the rest of the home?

For cat-friendly furniture ideas indoors, see our pet-friendly home furniture guide.

Final Take

FunXplore is the best all-round walk-in, and Ketive is the simplest way to start with a window catio. Aivituvin and PawHut give big multi-cat spaces, while Pawtenda is the portable playpen option. Whatever you choose, double up on latches, add shade, and supervise until you trust it.