Cat window perches for 3 cats in a small flat

Three cats in a one-bedroom flat is exactly the situation where getting your window setup right really matters — window perches are honestly one of the best enrichment additions you can make for indoor cats, giving them birds, movement, sunlight, and a sense of territory all in one spot. The challenge with multiple cats is that a single perch creates a queue and can cause friction, so stacking perches vertically at the same window is the smartest move. To point you to the right option, it'd help to know: roughly how heavy is each cat, what type of windows do you have (standard double-glazed, older single pane, or something else), and are all three cats likely to use the same window or do you have a couple of windows you could spread them across?

That weight range is very manageable — double glazed glass is smooth and consistent which is ideal for suction cups, and 5.5kg is well within what a good perch handles. Two perches on one window and one on the other is a sensible split. What I'd recommend is the Kitty Cot Original World's Best Cat Perch — it's the one I keep coming back to for multi-cat setups. It uses four large suction cups, has a rated capacity of around 25kg, and the shelf itself is big enough that two cats can share one in a pinch. More importantly, multiple units stack neatly on the same window without the frames clashing. You'd put two on your larger or more bird-facing living room window at different heights, and one on the other. The cats naturally sort out hierarchy by height — top perch becomes prime real estate, which actually reduces conflict compared to side-by-side arrangements.

That's the right thing to worry about — cheap perches use small cups that lose grip within weeks, especially if there's any temperature fluctuation near the glass. The Kitty Cot uses oversized cups, roughly 7.5cm each, and the trick is prep: the glass needs to be completely clean and dry before you press them on, and you should give each cup a firm twist as you attach it rather than just pushing straight in. Once they're on properly they hold extremely well on double glazing — you do want to press them in and re-check after the first 24 hours, and then a quick check monthly takes about ten seconds. I'd also say: mount them at a height where a fall wouldn't hurt the cat, just as a precaution with any suction product, but with the Kitty Cot properly fitted I've not seen reports of failures under the weight rating.

A gap of about 35–40cm between the bottom of the upper perch and the top of the lower one works well in practice — enough that the cat on the lower perch isn't getting sat on, and the upper cat has clear sightlines. The Kitty Cot shelf is around 28cm deep, so on a standard floor-to-ceiling window you can comfortably fit two with room to spare. If your windows are shorter, just go as wide a gap as the window allows and position the lower one high enough that it's still an appealing spot rather than a floor-level afterthought. Cats on the lower perch still get plenty of stimulation — it's really the top one that becomes the coveted throne.

Good call — three Kitty Cots across two windows will genuinely change how those cats spend their days. Clean the glass well before fitting, give the cups a proper twist, and check them after the first day. Your biggest cat will almost certainly claim the top spot within about an hour and consider it entirely his own invention.