Best Dog Door for Sliding Glass Door Setups: Panel Inserts That Fit Without Cutting

The most practical dog door for sliding glass door openings is a panel insert: a tall frame with a pet flap that stands in the slider's existing track, so the glass, door, and wall stay uncut. Renters can take it with them, and most panels need no tools beyond a tape measure.

Choosing the right panel comes down to two numbers people often get wrong: the height of the track and the height of the dog at the back. After that, the questions are how the slider locks and how well the panel seals.

How a sliding glass dog door insert works and who it suits

A dog door for a sliding glass door is usually an adjustable aluminum panel insert that sits in the existing track and needs no cutting. Before you buy one, take two measurements: the track height of the door, and your dog's height at the tallest point of the back.

On PetSafe's Freedom and Extreme Weather panels, a spring-loaded tension design seats the panel into the existing track channels with no drilling or cutting, according to PetDoors.com. The frame is extruded aluminum with tempered safety glass, and the sliding door now closes against the panel.

On a double slider, one of the two doors has to be made stationary, which leaves a single moving door for people, as the PetDoors.com installation guide explains.

A panel insert suits several kinds of homes:

• Renters, condos, and vacation homes. Panels are non-permanent and leave the property unaltered, which the PetDoors.com blog singles out as the main reason renters choose them.
• Small dogs and cats. PetSafe's Small size has a 5 1/4 by 8 3/16 inch flap opening and is described as suiting Chihuahuas, Yorkies, and cats. Cat-only homes should also compare the best cat doors.
• Medium dogs. PetSafe's Medium flap opening is 8 1/4 by 12 3/16 inches, for a recommended pet height of 6 to 12 inches.
• Large and extra-large dogs. PetSafe's Large and Tall Large panels share a 10 1/4 by 16 3/8 inch flap, with recommended pet heights of 8 to 19 inches and 12 to 23 inches. That is the biggest flap among the PetSafe and Ideal panels here.
• Tall sliders. PetSafe lists a tall track range of about 91 1/2 to 96 inches on its Extreme Weather line and sells a 96-inch panel for big doors.

None of the six picks below is electronic. If you want a door that opens for a sensor, collar key, or microchip, start with our guide to electronic dog doors. For a broader primer, see our guide to dog doors for sliding glass doors.

A pet door only makes sense when the patio opens onto a secure space your dog can use unsupervised, so set up a dog-friendly yard first.

Can you put a doggie door in a glass slider?

Yes, in two ways. A panel insert stands in the track opening beside the sliding door, needs no cutting, and moves with you. An in-glass pet door is different: a glazier cuts the glass and installs the pet door into it, which is professional work, per the PetDoors.com in-glass guide.

What is the best dog door for a sliding glass door?

For most standard-height sliders, the PetSafe Sliding Glass Pet Door, 2-Piece, Medium is the best starting point: it adjusts to the existing track, needs no cutting, comes with a latch kit so the slider still locks, and moves with you.

For tall doors, choose the PetSafe 96-in Sliding Glass Pet Door, Large. For harsh winters, choose the PetSafe Extreme Weather Sliding Glass Cat & Dog Door, White, Large. When budget comes first, look at the Hakuna Pets All-Weather Patio Pet Door, Black, Medium.

Our picks: the best dog doors for sliding glass doors

Each pick is a panel insert sold on Chewy. Specs come from manufacturer support pages and retailer listings, and where a figure is not published for the exact model, that is stated. Prices are Chewy's listed prices in October 2026 and change often.

PetSafe Sliding Glass Pet Door, 2-Piece, Medium: best overall adjustable panel

From ChewyIn stock

PetSafe Sliding Glass Pet Door, 2-Piece, Medium

Two-piece aluminum panel that adjusts to your existing track with no cutting, sized for medium dogs.

$229.95

Buy on Chewy

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This is the adjustable panel most households should start with. Chewy's listing describes a detachable panel that automatically adjusts to fit existing sliding door tracks, needs no cutting, and comes with you when you move, which suits rentals, condos, and apartments.

• Flap opening: PetSafe's Medium is 8 1/4 by 12 3/16 inches; PetSmart lists the height as 12 1/4 inches.
• Recommended pet height: 6 to 12 inches at the back.
• Build: extruded aluminum frame with tempered safety glass.
• Lock: a latch kit lets you lock the sliding glass door, and a slide-in closing panel shuts the pet flap, per Chewy's listing.
• Price: listed at $229.95 on Chewy in October 2026.

The tradeoff: the two pieces join at a spring-loaded height adjuster that is fixed with two small sheet metal screws through pre-drilled holes in the panel. The listing does not give the exact height range, so match it to your track before ordering.

PetSafe 96-in Sliding Glass Pet Door, Large: best for tall 96-inch sliders

From ChewyIn stock

PetSafe 96-in Sliding Glass Pet Door, Large

Tall panel for 96-inch sliders with PetSafe's large 10 1/4 by 16 3/8 inch flap opening.

$269.95

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PetSafe's regular-height panels stop at 80 11/16 inches, so an 8-foot slider needs a tall panel. Chewy describes this one as installing in the existing sliding door tracks without cutting into a door or wall, and as lifting out in one piece when you move.

• Flap opening: 10 1/4 by 16 3/8 inches, PetSafe's Large size.
• Recommended pet height: 8 to 19 inches for Large, or 12 to 23 inches for Tall Large.
• Track: PetSafe's tall range is listed at about 91 1/2 to 96 inches on its Extreme Weather line.
• Lock: an included latch kit locks your sliding door once the panel is in, and a closing panel locks the pet door, per Chewy.
• Price: listed at $269.95 on Chewy in October 2026.

The tradeoff: the listing does not state the exact adjustment range, so measure carefully. A door that falls between 80 11/16 and about 91 1/2 inches sits in the gap between PetSafe's regular and tall ranges.

PetSafe Sliding 80 11/16-in Glass Pet Door, White, Medium: best for standard 80-inch sliders

From ChewyIn stock

PetSafe Sliding 80 11/16-in Glass Pet Door, White, Medium

Medium panel built for regular-height tracks up to 80 11/16 inches, priced below the 2-piece version.

$189.95

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Named for the top of PetSafe's regular range of 75 7/8 to 80 11/16 inches, this is the straightforward pick for a standard-height slider. Chewy's listing pitches it at apartments and rented houses, installed without cutting into an existing door or wall.

• Flap opening: 8 1/4 by 12 3/16 inches.
• Recommended pet height: 6 to 12 inches.
• Lock: it comes with a latch kit so you can still lock the main door, plus a lock on the pet door, per Chewy.
• Price: listed at $189.95 on Chewy in October 2026, the lowest of the three standard PetSafe panels here.

The tradeoff: it is a medium flap only. A dog taller than 12 inches at the back needs a Large panel instead.

PetSafe Extreme Weather Sliding Glass Cat & Dog Door, Large: best insulated panel

From ChewyIn stock

PetSafe Extreme Weather Sliding Glass Cat & Dog Door, White, Large

Insulated panel with dual-pane glass, weather stripping, and three magnetic flaps for harsh winters and hot summers.

$347.70

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For cold winters or hot summers, this is the insulated choice. Chewy lists dual-paned glass, weather stripping, and three flexible flaps with a magnetic seal. PetDoors.com's Extreme listing adds Low-e glass, a tinted vinyl flap with a magnetic strip, and self-adhesive weatherstripping for the frame gaps.

• Flap opening: 10 1/4 by 16 3/8 inches, PetSafe's Large size.
• Track ranges: 75 7/8 to 80 11/16 inches, or a tall range of about 91 1/2 to 96 inches.
• Mounting: two sections attach and fit into the track, secured with removable adhesive strips or screws, per PetSmart.
• Lock: Chewy's listing says to lock the slider with a security bar placed between the door frame and the interior sliding door. The panel's secondary pin lock is not designed to mate with the slider's existing lock.
• Price: listed at $347.70 on Chewy in October 2026.

The tradeoff: it costs the most of the six, and the retailer page is inconsistent about which sizes and colors come in the tall range, so confirm yours before ordering.

Hakuna Pets All-Weather Patio Pet Door, Black, Medium: best budget panel

From ChewyIn stock

Hakuna Pets All-Weather Patio Pet Door, Black, Medium

Lowest-cost aluminum patio panel here, aimed at smaller breeds and installed without tools.

$98.39

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Chewy listed it at $98.39 in October 2026, the lowest price in the group. The listing describes a powder-coated aluminum dog door designed to fit most sliding door openings, suited to smaller breeds, that slides into place with no tools.

• Frame: Chewy's size chart lists the medium at 1.37 inches deep, 12.2 inches wide, and 84.25 inches high.
• Lock: to secure the house, Chewy's listing says to take out the pet door and lock the slider normally.
• Weather and insects: a magnetic catch on the flap, weather panels, and fiberglass mesh panels that keep insects out while letting air through.
• Flap and height range: the listing does not publish them.

The tradeoff: fewer published specs than the PetSafe and Ideal panels, and locking up means removing the panel. Check Hakuna's size chart against your track height and your dog before ordering.

Ideal Pet Products Dog & Cat Patio Door, Medium: best alternative aluminum frame

From ChewyIn stock

Ideal Pet Products Dog & Cat Patio Door, Medium

Aluminum patio panel for aluminum-frame sliders, with tempered glass and a medium flap.

$172.51

Buy on Chewy

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Chewy's listing says this panel is designed for sliding glass doors with aluminum frames, with clear tempered glass, a flexible clear vinyl flap, weather stripping, and a white finish.

PetDoors' listing for Ideal's Fast Fit panel gives the clearest published specs for the line: a spring-loaded design that installs tool-free at standard heights in a channel-style track at least 7/8 inch wide.

• Flap opening (Fast Fit medium): 7 by 11 1/4 inches with a 4-inch step-over, for pets 5 to 16 inches tall.
• Sealing (Fast Fit): a foam bumper seal, a vinyl side draft seal, and magnets along the bottom edge of the flap.
• Lock (Fast Fit): a secondary pin lock that requires drilling, with a drill-free Charley Bar as an option.
• Price: listed at $172.51 on Chewy in October 2026.

The tradeoff: listings disagree on height ranges, with PetDoors giving 75 to 77.75 and 77.75 to 80.25 inches and other retailers 77 5/8 to 80 3/8 inches. Check Ideal's own chart before you order.

Measuring your sliding door track and choosing a panel height

Track height is the distance from the base of the bottom track to the top of the upper track. The panel you buy needs a height adjustment range that includes that number, according to the PetDoors.com measuring guide.

1. Slide the door open and measure from the innermost part of the bottom track to the innermost part of the top track.
2. If the track has a pencil railing, include it in the measurement, because the panel straddles it.
3. Check the track type. Channel-style tracks take most panels; a monorail track may need a monorail adapter.
4. Measure your dog from the tallest point of the back to the ground, not to the top of the head.
5. Choose the size whose recommended pet height covers your dog and whose range covers your track.

Watch the gap between ranges. PetSafe's regular range ends at 80 11/16 inches and its tall range starts around 91 1/2 inches, so a door that measures in between needs a check of the maker's chart, or a different kind of door.

Each maker publishes its own track height ranges, recommended pet heights, and flap opening sizes, and no single chart covers every brand.

Locking and security with a dog door panel in place

A panel insert changes how the slider locks. Most panels will not mate with the slider's existing lock, so a separate way to hold the door shut is usually needed, according to the PetDoors.com blog. What that separate lock is depends on the panel.

How each pick locks, per its Chewy listing:

• Latch kit included: the PetSafe Sliding Glass Pet Door, 2-Piece, Medium, the PetSafe 96-in Sliding Glass Pet Door, Large, and the PetSafe Sliding 80 11/16-in Glass Pet Door, White, Medium each come with a latch kit so you can still lock the sliding door.
• Security bar: the PetSafe Extreme Weather Sliding Glass Cat & Dog Door, White, Large locks with a security bar placed between the door frame and the interior sliding door.
• Remove to lock: with the Hakuna Pets All-Weather Patio Pet Door, Black, Medium, you take out the pet door and lock the slider normally.
• Pin lock: for the Ideal Pet Products Dog & Cat Patio Door, Medium, Ideal's Fast Fit listing describes a secondary pin lock that requires drilling, with a drill-free Charley Bar as an option.

PetSafe's sliding glass pet door security bar fits between the door frame and the interior sliding door, with eight length settings from 12 1/2 to 28 inches, per PetSafe support. Hook it into the bracket, swing it over, and snap it into the clip. It mounts with adhesive strips or, permanently, with screws.

Judge any panel by how it secures the slider, not just the flap. Work through this checklist:

• Does the panel lock mate with your slider's lock? On most panels it does not, which is why a latch kit, bar, or clamp matters.
• Will you drill? The PetSafe 1-piece lock is drilled into aluminum, wood, or vinyl doors, with the bolt left about 1/8 inch from the frame. Drill marks must never touch the glass.
• Prefer no holes? A security bar on adhesive strips, a clamp, or a drill-free Charley Bar holds the door shut.
• Is a bar included? Check the listing. PetSafe's 1-piece panel guide lists its security bar as a separately sold extra.
• Low-tech backup: retail staff suggest a wooden dowel in the track or a charley bar.

No primary source we found states how well these panels resist forced entry, so treat any panel as a pet door, not a security device, and keep the slider locked.

Insulation, drafts, and panels for hot and cold climates

Drafts come in through the flap and through the gaps where the panel meets the track and the doors. Sealing depends on weather stripping, magnetic flaps, and dual-pane glass, per the PetDoors.com blog. For cold winters or extreme heat, look for:

• Multiple, magnetically sealed flaps. PetDoors recommends a double flap system and magnetically sealed flaps for extreme weather.
• Dual-pane glass. The Extreme Weather panel pairs dual-paned Low-e glass with three flexible flaps.
• Vinyl where insulation matters most. Vinyl panels are thicker and more energy-efficient than aluminum, which is lighter and cheaper but insulates less. Vinyl helps keep a home cool in summer and warm in winter.
• Weather stripping for the frame gaps. PetSafe panels ship with self-adhesive weatherstripping for the gaps along the sliding door channel, and the install adds a glass sweep along the back edge of the sliding door, with the brush touching the fixed door.

For cold winters, the PetSafe Extreme Weather Sliding Glass Cat & Dog Door, White, Large is the only pick here listed with dual-pane glass and three magnetic flaps. In milder climates, an aluminum panel with its supplied weather stripping is the lighter, cheaper route.

We found no reliable published figure for how much energy a sealed panel saves, so treat savings percentages on product pages with caution.

Installing a sliding glass dog door without cutting anything

Installing a panel insert is DIY work. Most panels need no tools beyond a tape measure, and a dry fit first is recommended, per the PetDoors.com installation guide. "Without cutting" means the glass, door, and wall stay intact, though some steps use small screws in the panel or a lock drilled into the door.

If your home has a security system, contact the provider before installation, since door sensors may need moving, as PetSafe's 1-piece guide advises.

How do you install a dog door in a sliding glass door?

On PetSafe's 2-piece panel, the PetSafe installation guide gives a short sequence:

1. Measure your track height and your dog, as described above.
2. Remove the cardboard inserts from the panel.
3. Seat the top of the panel in the upper track, press the spring-loaded height adjuster up, and lower the bottom into the lower track.
4. Face the side with the flap screw heads visible toward the interior, and check that the panel sits flush against the frame in both tracks with no gaps.
5. Fix the height adjuster with two 5/8 inch sheet metal screws through the pre-drilled holes, using a 7/64 inch bit. Keep screws snug, because overtightening can warp the pet door frame.
6. Apply weather stripping along the door edge and the glass sweep along the back edge of the sliding door.
7. Add your latch kit, lock, or security bar.

Never drill inside the panel's rib lines, where the glass is. On the PetSafe 1-piece panel, T-bracket holes go only in the outer edge.

Other brands work on the same idea, but screw sizes, adjusters, and locks differ, so follow that maker's own installation instructions.

A few related jobs work differently:

• Building your own. A panel is already the do-it-yourself route: no glazier and no cut glass.
• Sliding screen doors. Panels fit the glass door's track. A sliding screen door with a pet door built in is a separate product with its own fit details.
• Removal. Because the panel is held by spring tension in the existing tracks, removing it reverses the install: take off the lock or security bar and adjuster screws, push the panel up against the adjuster, and lift the bottom out of the lower track.

How much does it cost to put a dog door into a glass sliding door?

A panel insert you fit yourself costs only the panel. When we checked in October 2026, Chewy listed the six panels above from $98.39 for the Hakuna Pets All-Weather Patio Pet Door, Black, Medium to $347.70 for the PetSafe Extreme Weather Sliding Glass Cat & Dog Door, White, Large.

Premium Endura and Liberty panels at PetDoors.com were listed from $549.99 to $799.99. An in-glass door adds a glazier fee that varies by installer.

When a panel insert is the wrong choice

Panels are not the cheapest kind of pet door, and price rises with height, glass type, and flap features. Choose a wall door or an in-glass door instead when:

• You want to keep the slider's own lock. An in-glass door is the better fit, per the PetDoors.com in-glass guide.
• Your dog is taller than 23 inches at the back. That is the top of PetSafe's recommended pet height for its Tall Large panel, so a giant breed will be cramped.
• You cannot give up a door. On a double slider, one door must become stationary.
• Your track does not fit. A height between ranges, or a monorail track without an adapter, rules many panels out.

For a wall or door mount, our best dog doors roundup compares options, and it also covers the main disadvantages of a doggie door, such as security and drafts, and what you can use instead of one. Our dog doors overview explains the main types.

If you mainly need to keep your dog in one part of the house while the slider stays shut, one of the best dog gates may do the job without any pet door.

Is there a sliding door with a dog door built in?

Yes, in effect. In-glass pet doors are sold as glass with the pet door already installed, and a glazier fits that glass into your slider. We found no published source for a complete retail sliding door sold with a dog door built in, so ask a local door installer what they can supply for your frame.

How much is a door with a doggie door built in?

No published price was available for a complete sliding door with a dog door built in. For in-glass doors, PetDoors' pricing covers only the glass with the pet door installed, and the glazier is billed separately. For comparison, Chewy listed panel inserts at $98.39 to $347.70 in October 2026, and PetDoors listed premium panels at $549.99 to $799.99.

Sliding glass dog door questions