Best Sliding Glass Door Accessories for Homes With Side Windows
If you are looking for a complete sliding glass door with fixed windows on each side, the products listed here are not full door-and-sidelight systems. They are pet-door inserts designed for existing sliding glass doors. Among them, the PetSafe panel is suited to large dogs, Hakuna Pets is a compact option for cats and small dogs, and FurrFinesse is a renter-friendly choice with a screen design. Check your door opening and your pet’s measurements before choosing.
| Product | Best For | Key Difference |
|---|---|---|
| Eillion Openable Pet Door | Buyers who want an openable panel | Fixed swing direction; drilling required |
| FurrFinesse Pet Door | Renters seeking airflow | No-cut installation and screen design |
| Hakuna Pets Pet Door | Cats and small dogs | Small flap and lockable panel |
| PetSafe Sliding Glass Pet Door | Large dogs | Large flap and one-piece installation |
| VEVOR Pet Door | Small and medium pets | Adjustable height and metal frame |
Eillion Openable Pet Door For Sliding Doors

The Eillion insert is best for households that want a pet opening in a panel that can also swing open for moving items through the doorway. Its metal-framed panel adjusts from 75 7/8 to 81 inches tall, and the listed glass-door width is 14.8 inches. The height range makes it important to measure the inside of the door tracks before ordering.
A key limitation is the fixed swing direction: installation on the left allows inward opening, while installation on the right allows outward opening. The product information also says installation requires drilling holes in the door frame. Choose it if its swing direction and installation method suit your doorway; avoid it if you need a no-drill setup.
FurrFinesse Pet Door With Screen Design

FurrFinesse is best for renters and apartment residents who want a removable pet-door insert without cutting into a door or wall. The panel adjusts from 75 3/5 to 80 inches tall, and the listing describes a screen design intended to promote air circulation during warm months. Its stated installation does not require cutting or complex tools.
This option is better for buyers who prioritize a no-cut installation and airflow than for shoppers seeking a full replacement patio door. The supplied features do not specify the flap opening dimensions or a pet weight limit, so confirm that the passage suits your pet before purchasing.
Hakuna Pets Tempered Glass Pet Door

Hakuna Pets is best for cats and small dogs up to 20 pounds. Its flap measures 6.7 inches wide by 9 inches high, with a 2-inch step-over. The insert is described as tempered glass that fits into an aluminum sliding patio door track, allowing the slider to continue opening normally.
For renters, the spring-jack pressure mount installs without drilling; included brackets offer a permanent mounting option. A metal panel slides into place to block the pet opening. The main limitation is its small flap: measure your pet’s width and shoulder height, and choose another size if this opening would be restrictive.
PetSafe Sliding Glass Pet Door For Large Dogs

PetSafe is best for households with large dogs, with a listed flap opening of 10 1/4 by 16 3/8 inches and a stated fit for pets up to 100 pounds. Its one-piece panel adjusts from 75 7/8 to 80 11/16 inches tall. The listing describes installation as a do-it-yourself project that does not require cutting into walls or doors, and identifies it as suitable for rental homes.
Choose this panel when the large flap and adjustable height match your pet and door. The listed height range is narrower than some options here, so measure the track opening carefully. The product information does not give a flap step-over height.
VEVOR Adjustable Sliding Glass Pet Door

VEVOR is best for buyers looking for a metal-framed insert with a flap suited to small or medium-sized pets. The flap measures 10 1/4 by 16 1/4 inches, and the panel adjusts from 75 7/8 to 80 11/16 inches high. Its listed construction includes an aluminum frame, tempered glass, a metal plate, and a rotating-hinge structure.
Its adjustable height can simplify fitting different door openings, but it still must fall within the stated range. The listing describes the flap for small and medium pets, so do not assume it is appropriate for a large dog based only on the opening dimensions.
Buying Guide
Are you buying a full door with windows on both sides?
These five products are pet-door inserts for existing sliding glass doors, not complete patio door systems with fixed side windows, also called sidelights. If your project requires a new door and sidelights, look for a door manufacturer or contractor that offers a configuration matching your opening. Confirm the overall frame dimensions, glass layout, and installation requirements for that separate project.
How should you measure the opening?
Measure the height inside the sliding door tracks, following the product’s directions. Compare that measurement with the insert’s adjustment range. Also check track width or thickness where the product specifies it, and make sure the insert will not prevent the main slider from operating as intended.
How do you choose the right pet opening?
Measure your pet’s shoulder height and body width, then compare those measurements with the flap dimensions and step-over height. A stated maximum pet weight is useful, but it does not replace checking whether the actual opening is comfortable for your animal.
Which installation style fits your home?
Pressure-mounted or no-cut panels may suit renters who need removable products. A drilled or bracket-mounted model may be preferable when its installation method fits the home and the owner’s plans. Read the installation details before buying; do not assume every insert is damage-free or compatible with every track.
Frequently Asked Questions
Are these products sliding glass doors with windows on each side?
No. They are pet-door inserts for existing sliding glass doors. They do not include a complete door frame with fixed windows on both sides.
Which option is listed for the largest pets?
PetSafe is listed for pets up to 100 pounds and has a 10 1/4-by-16 3/8-inch flap.
Which product is specified for cats and small dogs?
Hakuna Pets lists a 6.7-by-9-inch flap for cats and small dogs up to 20 pounds.
Do all the inserts avoid drilling?
No. Eillion’s product information says drilling holes in the door frame is required. Other listings describe no-cut or no-drill installation, but installation details vary by model.
Can I choose an insert by height alone?
No. Check height, track fit, flap size, pet measurements, and the installation method. A compatible height does not guarantee that the panel or pet opening will suit your door and household.