The best stair gate with a cat flap lets a cat pass while keeping a larger dog or child on the other side. The Carlson gate suits narrower openings with a clearly specified fit range, while Babelio’s adjustable models fit wider openings and offer controlled cat-door access. The BETERTEK retractable gate is a space-saving choice for openings up to 55 inches. Measure your opening and check the installation instructions before choosing a gate for stairs.
| Product | Best For | Opening Width | Cat Door |
|---|---|---|---|
| Carlson Extra Wide Gate | Narrow openings | 29–36.5 inches, with a gap noted below | Small pet door with lock |
| Babelio CatPrivilege III, Black | Adjustable cat access | 29–43 inches | Three settings |
| BETERTEK Retractable Gate | Wide openings and storage space | Up to 55 inches | 6 × 7 inches |
| Babelio CatPrivilege III, White | Adjustable access in a light finish | 29–43 inches | Three settings |
| Babelio CatPrivilege I | Auto-close convenience | 29–43 inches | Adjustable and lockable |
Carlson Extra Wide Gate With Small Pet Door

This 30-inch-tall metal gate is designed for openings from 29 to 36.5 inches, but its fit range has an important exception. It fits 29–32 inches without the extension and 34–36.5 inches with the included 4-inch extension. It does not fit openings from 32 to 34 inches.
The built-in small pet door has a locking feature, and the main walk-through opening is 16.5 inches wide with a one-touch latch. Best for: households with a cat and a larger dog that need a small-pet passage in a narrower doorway. Its defined width ranges make it easier to assess fit before buying. Limitation: skip it if your opening measures 32–34 inches or falls outside the listed ranges.
Babelio CatPrivilege III Gate, Black

The black CatPrivilege III fits openings 29–43 inches wide using included extensions and stands 30 inches tall. Its 7-by-5.8-inch cat door has three adjustable settings, giving owners options for controlling access. The gate uses pressure mounting, requires no tools or drilling for setup, and has a one-hand-operated walk-through door that can gently auto-close or stay open.
Best for: homes that need a broad width range and adjustable cat access. The three settings distinguish it from gates with a simple fixed pet opening. Limitation: pressure mounting may not suit every installation location; check the product instructions and opening before using it on stairs.
BETERTEK Retractable Gate With Cat Door

This retractable mesh gate is 33 inches tall and is listed for openings up to 55 inches wide. The 6-by-7-inch cat door provides a separate passage, while the mesh rolls away when the barrier is not in use. Its stated mesh features include a soft, scratch-resistant construction.
Best for: wide openings or rooms where a gate that retracts out of the way is useful. It offers a different form factor from the rigid metal gates in this list. Limitation: the product information gives a maximum width of 55 inches, not a minimum range, so confirm the mounting space and instructions for your opening before selecting it.
Babelio CatPrivilege III Gate, White

This white version of the CatPrivilege III has the same listed fit range and features as the black model: it fits 29–43-inch openings, stands 30 inches tall, and includes a 7-by-5.8-inch cat door with three adjustable settings. The pressure-mounted installation is described as tool-free, and the main door can auto-close or remain open.
Best for: buyers who want the CatPrivilege III’s adjustable pet-door settings and prefer a white finish. It offers the same access-control approach as the black version, so color and room appearance can guide the choice. Limitation: it is not a different width or height option from the black model; compare measurements rather than assuming the finish changes fit.
Babelio CatPrivilege I Auto-Close Gate

The CatPrivilege I is a metal gate for openings 29–43 inches wide, with included extensions for width adjustment. It stands 30 inches tall and combines a one-hand walk-through door with an auto-close and stay-open feature. Its small pet door adjusts up and down and can be locked.
Best for: buyers who prioritize a gate that can close behind them and want a lockable cat passage. The adjustable, lockable opening gives more control over when a small pet can pass. Limitation: the listing does not specify the pet-door dimensions, so check whether its size suits your cat before choosing it.
Buying Guide: How to Choose a Stair Gate With a Cat Flap
How do you measure for a gate?
Measure the width of the opening where the gate will sit, following the product’s installation guidance. Compare that measurement with the exact supported range, including any extension requirements. Do not assume that a gate fits every width between its smallest and largest listed measurement: the Carlson model, for example, has a 32–34-inch gap in its fit range.
Which cat-door design gives you more control?
Choose an adjustable or lockable flap if you need to change when the cat can pass. Both Babelio CatPrivilege III models list three settings, while the CatPrivilege I lists an adjustable, lockable pet door. The Carlson also lists a locking feature. The BETERTEK listing specifies the flap’s dimensions but does not describe adjustable settings.
Should you choose metal or retractable mesh?
Metal models offer a rigid barrier and a conventional walk-through door. The BETERTEK’s mesh retracts when not in use and is listed for openings up to 55 inches, which may suit a wide space where a fixed gate is inconvenient. Compare the mounting requirements, opening width, and instructions for your intended location before deciding.
What should you check before using a gate on stairs?
Confirm that the specific model’s installation instructions allow your planned stair location and follow all mounting directions. Check that the gate is secure before relying on it, and consider whether its pressure-mounted design is appropriate for that placement. Product fit and access features do not replace careful installation.
Frequently Asked Questions
Can a cat pass through these gates while a dog stays behind?
Each listed product includes a small pet or cat door intended to provide a separate passage. Whether your cat can use it depends on the opening dimensions and the cat’s size.
Which listed gate fits the widest openings?
The BETERTEK retractable gate is listed for openings up to 55 inches wide. The Babelio models fit 29–43-inch openings.
Which gate has a lockable cat door?
The Carlson and Babelio CatPrivilege I listings specify a locking feature for the small pet door. The CatPrivilege III models list three adjustable settings.
Are these gates all pressure mounted?
The Carlson and Babelio CatPrivilege listings describe pressure-mounted installation. The BETERTEK listing describes a retractable mesh gate but does not specify its mounting method in the supplied product details.
Do the two Babelio CatPrivilege III gates have different features?
The black and white versions have the same listed size and features. Their stated difference is the finish color.