Quick answer: Wait until your cat is settled indoors in the new home, then build a fully enclosed mesh box outside a bedroom window, roughly 120 cm wide, 60 cm deep and 90 cm tall. Floor it with eight 30 cm cork tiles, fill planters only with outdoor plants on the ASPCA non-toxic list, and check the frame weekly.
Moving house is often the moment people finally get the outdoor space they wanted for their cat. A small planter catio, a mesh enclosure with built-in planting, gives an indoor cat fresh air and smells without free roaming.
The timing matters as much as the build. A cat that has just arrived in a strange home needs a calm indoor base first, and choosing cat safe plants outdoor means checking each one against a toxicity list before a single pot goes in. This guide covers both, plus a cork tile floor that is easy on paws.
Why Wait Before the Catio Opens
After a move, your cat's job is to learn the new indoor territory. Our first-week guide to bringing a cat home explains how to start with one quiet room and widen access gradually. A bedroom works well as that base, and it can later become the doorway to the catio.
Open the catio once your cat eats, sleeps and uses the litter tray normally, and moves through the home without hiding. For many cats that takes a few weeks. Rushing it adds a second unfamiliar space to a cat that has not finished mapping the first.
Check the Lease and the Wall First
- Read the lease or HOA rules for anything fixed to an outside wall or window frame.
- Ask the landlord in writing if the catio needs screws into the facade.
- Measure the window opening and the drop from sill to ground.
- Note which way the window faces; a south or west aspect needs shade in summer.
- Look for overhanging branches or ledges another animal could use to reach the mesh.
Cats Protection notes that the most important thing is to make sure the catio is completely secure, so that your cat cannot escape and other animals cannot get in. International Cat Care adds that overhanging trees can let cats climb and escape, which applies to a catio roof as much as a garden fence.
Planter Catio Dimensions and Materials
| Part | Size or amount | Notes |
|---|---|---|
| Frame timber | About 10 lengths of 45 x 45 mm | Use timber treated for outdoor use and let it dry fully |
| Galvanised welded mesh | About 5 m² for sides and roof | Small aperture so paws and heads cannot push through |
| Floor board | 120 x 60 cm exterior ply | Raised slightly so rain drains away |
| Cork tiles | Eight tiles, 30 x 30 cm | Four by two covers 120 x 60 cm exactly |
| Planter troughs | Two, about 50 cm long | Fixed inside the mesh along the back |
| Shelf | One, 25 cm deep | Set about 50 cm up for a lookout |
These numbers suit one cat in a compact space. If you have more room, scale the floor in multiples of 30 cm so the cork tiles still fit without cutting.
Choosing Cat Safe Plants Outdoor
Every plant in the catio will be sniffed, rubbed and probably chewed. The ASPCA list of plants toxic and non-toxic to cats is the reference to check before buying. Search each plant by its scientific name, because common names overlap.
Plants that appear on the ASPCA non-toxic list and cope outdoors in many climates include spider plant (Chlorophytum comosum) and Boston fern (Nephrolepis exaltata bostoniensis). Cats Protection suggests catnip and cat grass for a catio, alongside a reminder to make sure nothing you add is poisonous. Our indoor cat grass tray method works just as well in an outdoor trough.
- Check every plant, including ones that came with the new house.
- Avoid lilies of any kind; they are a serious risk to cats.
- Skip pesticides, slug pellets and fertiliser granules inside the enclosure.
- Use plain potting compost with no added chemicals.
- Keep plant labels so you can confirm a species later.
Why Cork Tiles Work on the Floor
Cork gives grip under paws, stays warmer to the touch than bare ply, and can be lifted and replaced one tile at a time. Glue the tiles to the floor board with a water-based adhesive and leave the whole floor to cure in the open air for several days before the cat goes near it.
Seal the edges where the tiles meet the frame so rain does not sit underneath. If a tile gets soiled or starts to crumble, prise it off and drop in a new one. The bedroom cork tile approach in our plant swap guide for a post-move bedroom uses the same tiles indoors.
Connecting the Catio to the Bedroom Window
Most planter catios join the house through an opened sash or a cat flap set into a panel that fills the lower half of the window. A removable panel is the renter-friendly option, since it comes out cleanly when you leave.
Inside, put a stable step or low shelf under the window so your cat can climb out without a leap. Our cat highway route planning guide covers spacing steps for an easy climb, and the no-drill window perch ideas show how to add a sill platform without fixing anything into the frame.
Supervision and the First Visits
- Sit in the bedroom with the window open for the first session and let the cat look out.
- Keep sessions short at first and close the catio at night.
- Watch for any gap the cat tests with a paw or head.
- Bring water out to the catio and keep a shaded corner.
- Close the window panel whenever you are away from home until you trust the frame.
Our guide to taking an indoor cat outside safely covers harness training if you want to extend outdoor time beyond the enclosure later.
Weekly Catio Safety Check
| Check | What to look for | Fix |
|---|---|---|
| Mesh | Loose staples, bent panels, gaps | Re-staple or replace panel |
| Frame | Wobble, rot, splinters | Tighten fixings, sand or replace |
| Plants | New seedlings, chewed leaves | Identify and remove anything unknown |
| Floor | Lifted or soiled cork tiles | Replace single tiles |
| Shade and water | Bowl empty, corner sunny | Refill and move shade cover |
Weeds and self-seeded plants can arrive on the wind. Pull anything you cannot identify rather than guessing.
Shade, Rain and Cold Weather
A small enclosure heats up fast in direct sun. Fix a shade cloth or a solid panel over one third of the roof so there is always a cool corner, and put the water bowl there. In rain, the cork floor should drain because the board sits slightly raised, but a soaked catio is still unpleasant, so close the window panel on wet days.
In winter, many cats will only want short visits. That is fine. Keep a folded fleece on the shelf, bring it inside when it gets damp, and never leave the window panel open overnight in freezing weather, when a draught can chill the bedroom your cat sleeps in.
Indoor Plants After the Move
A new home often comes with houseplants left behind or gifted by neighbours. Check those too. Our list of cat-safe houseplants for US apartments and the guide to swapping toxic plants for lookalikes help you replace anything risky without losing the green.
Keep scratching posts and a high resting spot inside as well. A catio is extra territory, not a replacement for the indoor setup your cat relies on every day.
Planter Catio After a Move Questions
How long after moving should I wait to open a catio?
Wait until your cat is eating, sleeping and using the litter tray normally, and exploring the new home without hiding. For many cats that is a few weeks. Starting with one quiet room, often a bedroom, and widening access gradually gives them a settled base before the catio adds new territory.
Which outdoor plants are safe for a catio?
Check every plant against the ASPCA toxic and non-toxic plant list by scientific name. Spider plant and Boston fern appear on its non-toxic list, and Cats Protection suggests catnip and cat grass for catios. Avoid all lilies and keep pesticides, slug pellets and fertiliser granules out of the enclosure.
Are cork tiles good for a catio floor?
Cork gives grip under paws, feels warmer than bare ply and lets you replace one tile at a time if it gets soiled. On a 120 by 60 cm floor, eight 30 cm tiles fit exactly. Use a water-based adhesive, seal the edges against rain, and let the floor cure outdoors for several days.
Can I build a catio in a rental?
Often yes, if nothing is screwed into the facade. Read the lease, ask the landlord in writing, and design the window connection as a removable panel. A freestanding frame on a balcony or patio, held by its own weight, is easier to take with you when you move again.
