Quick answer: A non-wobbly kitten condo is low and wide: a heavy base board larger than any platform above it, platforms no higher than a short hop, and joints that are screwed and glued rather than only stapled. Test it by pushing, tilting, dropping a weight on the top, pulling on the scratch post and rechecking every screw weekly.
Kittens climb everything, but they are not yet good at landing. A condo that rocks when a kitten jumps onto it teaches the kitten to avoid it, or worse, tips over. A stable condo gives a kitten somewhere to climb, hide and scratch from its first weeks at home.
The design below keeps everything low and broad, and the stability test at the end is the same one we use for adult trees, scaled for a small, fast climber. If you are still preparing for a new kitten, Cats Protection suggests a warm, secure bed at ground level for the first days; the condo can come once the kitten is exploring.
Design Rules for a Non-Wobbly Kitten Condo
- Base board wider and deeper than every platform above it.
- Total height kept low, so the top is reachable in two short hops.
- Platforms close together, so a kitten steps rather than leaps.
- Heavy parts at the bottom and lighter parts at the top.
- A hideaway box at floor level, not up high.
A low condo is not a compromise. Kittens use it more because they can reach every part, and it stays useful as they grow. Adults can use it as a first step to a taller tree later.
Sizing the Base for Stability
The base does most of the work in a stable condo. As a working rule, make it noticeably wider and deeper than the widest platform, and set the post towards the back so the front of the base acts as a landing pad. When a kitten jumps onto the front of the top platform, the extra base in front stops the condo pivoting forward.
Weight helps too. A thick base board is heavier than a thin one, and fixing the hideaway box to the base adds more weight low down. If the condo still feels light, screw a second board under the first. Do not add weight at the top; that makes rocking worse, not better.
Check the floor before you finalise the size. A condo with a broad base that sits half on a rug and half on floorboards will rock however wide it is.
Materials and Joints
Use thick plywood or solid timber for the base, and a solid post such as a length of timber for the upright. Fix the post to the base with wood glue and screws driven up through the base into the end of the post, plus a pair of angle brackets. Staples and hot glue alone will loosen with repeated jumping.
| Part | Good choice | Avoid |
|---|---|---|
| Base | Thick plywood or solid timber | Thin board or chipboard |
| Post | Solid timber | Cardboard tube |
| Platform joints | Glue plus screws and brackets | Staples or hot glue only |
| Scratch cover | Sisal rope or sisal fabric | Loose-weave carpet that snags claws |
| Finish | Water-based, fully cured | Fresh paint or varnish |
Seal bare wood with a water-based finish and let it cure in a ventilated space before the kitten uses it.
Building the Kitten Condo Step by Step
- Cut the base board and round its corners.
- Mark the post position off-centre towards the back, leaving a wide front landing.
- Glue and screw the post to the base from underneath, then add two angle brackets.
- Fix a low platform to the post with glue, screws and a bracket below.
- Fix the hideaway box to the base, not to the post, so it adds weight low down.
- Wrap the post in sisal, gluing at the bottom and top and pulling each turn tight.
Keep the sisal on the lower part of the post where a kitten can reach to stretch. International Cat Care notes that kittens start scratching from about five weeks old, so a reachable scratch surface is part of the design rather than an extra.
The Five-Part Stability Test
1. Push test
Push the top platform firmly from each side. The condo should not rock or lift a corner.
2. Tilt test
Tilt the whole condo a little in each direction and let go. It should settle back flat without wobbling.
3. Drop test
Drop a bag weighing more than the kitten onto the top platform from a short height. Nothing should creak or shift.
4. Scratch pull test
Hook your fingers into the sisal and pull hard towards you, as a stretching kitten would. The base should not slide or tip.
5. Weekly screw check
Every week, check each screw and bracket and tighten anything that has loosened.
If any test fails, fix it before use. A wider base, an extra bracket or a heavier hideaway box at floor level usually solves rocking. Our non-wobbly cat tree stability test covers the adult version.
Where to Put the Condo
Place the condo against a wall or in a corner on a flat, hard floor, away from the top of stairs and windows. A rug under the base can make it rock, so test it in its final spot.
Put it near where the kitten sleeps. International Cat Care suggests placing a scratch post near a favourite bed, because cats often scratch after waking up. A condo by the kitten's sleeping area gets used more than one in a spare room.
International Cat Care's home advice also notes that cats need high places and hiding places. A low condo offers both at kitten height.
Growing With the Kitten
As the kitten grows, repeat the stability test with a heavier bag. A condo that was stable for a small kitten may start to rock under a young adult. Add weight to the base or fit it to the wall with a furniture strap if needed.
Once the kitten is a confident climber, you can add a taller cat tree nearby and keep the condo as a first step. Our DIY cat tree hub covers taller builds, and wall cat tree stability testing covers fixing trees to the wall.
Common Kitten Condo Problems
- Condo rocks on carpet: move it to a hard floor or add a wider base board.
- Kitten ignores the condo: move it next to where the kitten sleeps or plays.
- Sisal unwinds: glue the ends again and add a staple under the glue line where no paw reaches.
- Kitten scratches furniture instead: add a flat cardboard scratcher too, in case it prefers horizontal surfaces.
For more on early scratching habits, see our guide on how to stop a kitten scratching furniture and the best corrugated cardboard for a kitten scratcher.
Safety Checks Beyond Wobble
Run a hand over every surface before the kitten uses the condo. Look for screw tips, staples, splinters and sharp edges, and sand or cover anything that catches your skin. Check that no gap between platform and post is wide enough to trap a small paw or head.
Remove any loose threads, tassels or dangling toys on string. Kittens chew, and swallowed thread is a serious risk. If you want a hanging toy, use one on a short, sturdy cord and take it off whenever you are not watching.
Related Kitten Builds
For the first week with a new kitten, our first-week guide for a new cat covers set-up and routines. The stud-safe version of a kitten condo, fixed to the wall, is in our kitten condo stud-safe build. Beds and caves for kittens are in the DIY cat beds and caves hub.
Kitten Condo Stability FAQ
How tall should a kitten condo be?
Low enough that a kitten can reach the top in two short hops, with platforms close together so it steps rather than leaps. Kittens are still learning to land, and a low condo gets used more. You can add a taller tree later and keep the condo as a first step.
Why does my DIY cat condo wobble?
Usually the base is too small, the post joint is only stapled or glued, or it stands on a soft rug. Use a base wider than every platform, fix the post with glue, screws and brackets, put heavy parts low, and test it on a flat, hard floor in its final spot.
How do I test a kitten condo is stable?
Push the top from each side, tilt and release it, drop a bag heavier than the kitten onto the top, and pull hard on the sisal as a stretching kitten would. It should not rock, slide or creak. Check and tighten every screw weekly as the kitten grows.
When do kittens start scratching?
International Cat Care says kittens start scratching from about five weeks old. Include a sisal-wrapped post on the lower part of the condo where a kitten can reach to stretch, and place the condo near where it sleeps, because cats often scratch after waking.
