Quick answer: In a townhouse, build one portable litter box that lives in an upstairs bedroom as a backup and travels with you. Use a lidded tote with a low cut entry, wrap a sisal rope carry handle, and place it away from the bed with a closing door left ajar, so the cat never has to cross floors at night.
Townhouses stack rooms vertically. The cat's main litter box is often on the ground floor near the laundry, while people sleep two flights up. Older cats, kittens and cats recovering from illness may not make that trip in time at night, and a second box upstairs is what most feline vets suggest anyway.
That second box can also be your travel box. Build it once, keep it in use upstairs so it smells familiar, and carry it to the car when you go away. For the main box downstairs, our hidden litter box guide shows how to tuck it into furniture.
Why Multi-Level Homes Need a Second Box
A common rule of thumb is one box per cat plus one, spread across the home. In a townhouse, spreading means one box per level the cat uses. A cat that is upstairs when the urge strikes may choose the bath mat rather than walk down two flights.
Ohio State's Indoor Pet Initiative treats easy access to a clean litter box as one of an indoor cat's basic needs. Stairs count as a barrier for stiff joints, so an upstairs box is a kindness for a senior cat even if a younger one rarely uses it.
Building the Tote Box
Pick a clear or light-coloured tote about 45 by 32 cm with a clip-on lid. Mark an entry on one long side 10 cm from the floor and 22 cm wide. Cut it with a fine-toothed saw or hot knife, then file the edge smooth and cover it with split tubing so no sharp lip touches the cat's belly.
A lid keeps litter in on the move and, in the bedroom, limits dust. Drill a row of 6 mm holes along the top of the back wall for airflow. Wash and dry the tote before adding litter.
Wrapping a Sisal Rope Carry Handle
A full tote is awkward on stairs. Thread a 50 cm length of 25 mm polypropylene webbing through two slots cut under the lid rim on the short sides, and knot the ends inside. Then wrap 6 mm sisal rope tightly around the middle 25 cm of the webbing and glue only the two ends with a dab of water-based PVA.
The rope gives a comfortable grip and doesn't cut into your hand. Keep the wrap above the lid so the cat can't reach it from inside the box. Check the knots monthly; webbing frays faster than rope.
- Cut two webbing slots, each 3 cm wide.
- Thread and knot the webbing inside the tote.
- Wrap sisal rope tightly over the centre section.
- Secure each rope end with a small amount of PVA and let it cure overnight.
- Load-test by lifting the tote full of litter several times.
Choosing Litter for Two Roles
A box that lives upstairs and also travels needs a litter that behaves well in both places. Clumping clay is heavy to carry but forms firm clumps that bag neatly in a hotel bathroom. Lightweight clumping blends cut the carrying weight by about a third, though some produce more dust in a closed bedroom.
Whatever you choose, use the same product in the downstairs main box. Cats link the feel of litter under their paws with the act of toileting, and two different textures in one house can lead a fussy cat to favour one box and ignore the other. Buy in one bulk bag and decant a travel portion into a sealed tub.
Avoid scented litters and deodorising powders in a sleeping room. Fragrance that seems mild to people can be strong to a cat sitting right on top of it, and the smell lingers in bedding.
Placing It in the Bedroom
Choose a corner far from the bed, ideally beside a wardrobe or behind a chair, on a hard floor or a washable mat. Keep it away from where you put your feet on getting up. Cats prefer a view of the door, so turn the entry to face into the room rather than the wall.
Leave the bedroom door ajar at night, or fit a door stop, so the cat can come and go. A box behind a shut door is not a backup at all. If tracking onto carpet is a worry, our exit-path mat system works upstairs as well as down.
Making Room in a Small Townhouse Bedroom
Townhouse bedrooms are often narrow, with the bed taking most of the floor. If there is no free corner, look at the space under a window seat, the end of a fitted wardrobe or a gap beside a chest of drawers. The box needs about 60 by 50 cm including a step-out zone.
A low folding screen or a plant stand placed in front can hide the tote without boxing it in. Leave the top open so air moves freely. Our small apartment cat home hub has more ideas for squeezing cat essentials into tight rooms, and many of them translate directly to a townhouse upper floor.
Stairs, Doors and the Night Route
Walk the route the cat takes at night. Is there a baby gate, a closed landing door or a slippery tread? Remove the barriers between the cat's sleeping spot and both boxes. A carpet runner on bare stairs helps older cats grip.
Some cats sleep on the ground floor and only come up in the morning. Watch for a week to see where the cat actually spends the night before deciding the bedroom is the right spot; a landing or spare room may suit better.
Taking the Same Box on a Trip
Because the box is in daily use, it already smells right to the cat. On travel day, scoop it, tip the litter into a sealed bag to take with you, wipe the tote and clip the lid on. Carry it by the rope handle to the car and wedge it in the footwell.
At the destination, set it up in a quiet bathroom and pour back the familiar litter. International Cat Care on travelling with your cat suggests keeping familiar bedding and scents around, and a lived-in litter box is one of the strongest scents you can bring.
Put a cheap spare tray in the bedroom while the portable box is away, so nobody comes home to an accident on the rug.
Keeping a Closed Bedroom Fresh
Bedrooms are small and often closed for warmth. Scoop daily, top up rather than replace litter mid-week, and fully change it every two weeks. An unscented clumping litter keeps smells lower than scented ones, which many cats dislike.
An activated carbon pad fixed inside the lid absorbs odour without adding fragrance. Our carbon filter guide explains how to size and replace one, and our litter cleaning schedule sets out a routine for multi-box homes.
A Weekly Check Routine
- Run a fingertip around the cut entry edge to check the tubing is still in place.
- Inspect the webbing knots and the sisal wrap for fraying.
- Clear the airflow holes with a toothpick if dust builds up.
- Check the floor or mat under the box for damp or stains.
- Confirm the bedroom door still opens freely at night.
These checks take two minutes and catch the small problems that make a cat stop using a box. If the cat starts avoiding it, rule out health issues first; our guide to cats peeing outside the box lists the warning signs.
Townhouse Portable Litter Box Questions
Do I need a litter box on every floor of a townhouse?
If the cat uses every floor, yes, it helps. Stairs are a real barrier for older or arthritic cats, and a cat on the top floor may not walk down in time. One box per level, plus the main box, prevents most accidents and costs little.
Is it okay to keep a litter box in the bedroom?
Yes, if you scoop daily, use unscented clumping litter and keep it well away from the bed. Place it on a hard floor or washable mat, leave the door ajar at night and add a carbon pad in the lid if the room is small.
How do I make a carry handle for a litter tote?
Thread polypropylene webbing through two slots under the lid rim, knot it inside, then wrap sisal rope tightly over the middle for grip. Glue only the rope ends with a little water-based PVA. Test it by lifting the full tote several times before using it on stairs.
Can the bedroom box double as a travel litter box?
It works well, because the box already smells familiar. Before a trip, bag the clean litter to bring along, wipe the tote and clip the lid on. Leave a cheap spare tray upstairs while you are away so the routine at home isn't broken.
Where should the entry face in a bedroom corner?
Turn the entry toward the room so the cat can see the door while inside. Cats feel trapped when they face a wall with their back to the only exit. Leave at least 30 cm clear in front of the entry so the cat can step out easily.
