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In-Glass Pet Door
A made-to-order pet door with replaceable service parts, multiple frame colors and configurations for a more precise, lasting fit.
Choose your size →Sliding and hinged patio access
Dog Doors for Patio Doors
Patio doors include sliding glass panels, hinged French doors and solid lower panels, so the correct dog-door model depends on the actual construction.
3 matching products
Configure the right fit
Choose the installation model first, then verify pet size, rough opening, frame dimensions, finish and flap package.
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11 photos
Door-Mounted Pet Door
A made-to-order pet door with replaceable service parts, multiple frame colors and configurations for a more precise, lasting fit.
Choose your size →
5 photos
Pass-Through Door Pet Door
A made-to-order pet door with replaceable service parts, multiple frame colors and configurations for a more precise, lasting fit.
Choose your size →Buyer's guide
Choosing dog doors for patio doors
A sliding glass application normally requires professional evaluation and a compatible fabricated panel. A hinged patio door may accept a door model only when rails, stiles, glass and hardware leave enough flat mounting area.
Confirm traffic flow, locking hardware, screen operation and weather exposure before choosing the location. The pet-door opening must not compromise the patio door’s normal operation.
Buying guidance
How to choose dog doors for patio doors
Identify the patio door as sliding glass, hinged glass, French door or solid panel before choosing between an in-glass frame and a compatible door-mounted model.
The defining question for Dog Doors for Patio Doors is what the frame will pass through and what must remain functional around it. A flap opening is only the pet passage; the installed frame occupies more room and may interact with structural members, door rails, glass edges, screen frames, locks, trim and weather seals. Compare the product’s rough opening and outer dimensions with a drawing or taped outline on both faces of the proposed location. If the outline crosses hardware, uneven panels or required edge clearances, change the location or model before ordering.
Buying guidance
Fit the pet, then fit the frame
Check pet clearance and the complete frame against glass edges, rails, stiles, locks, handles and the screen path.
Separate animal fit from construction fit. First choose a clear opening that lets the pet pass with modest clearance at the shoulders and sides. Next translate that choice into the exact rough opening and tip-to-tip frame for the selected model. Finally confirm mounting height and step-over. This sequence matters because two frames with the same flap size can have different exterior requirements, and the easiest location for a contractor may not be the easiest height for the animal.
Dog Doors Depot carries 11 standard flap sizes from Small Medium through Giant, including tall intermediate sizes that separate height from width. Use the individual animal rather than the label as the decision-maker. After the clear opening is selected, compare the exact product variant because model families can use different frame, tunnel and cutout relationships. If every standard choice creates a meaningful compromise, use the custom-size workflow and keep the submitted dimensional basis attached to the order.
Buying guidance
Plan the installation before ordering
Glass requires a qualified glass professional; hinged panels require verified internal construction and enough flat area. Preserve egress and normal lock operation.
Read the model-specific manual before layout, not after the opening is cut. Verify tools, fasteners, sealants, tunnel pieces, frame orientation and any professional trade requirements. Check for utilities and structural conditions in walls; internal reinforcement and ratings in doors; support and mesh condition in screens; and fabrication requirements in glass. Protect finished surfaces and control dust or metal filings. After fastening, test that the original door, screen or panel still operates and that both pet-door flaps move without rubbing.
Buying guidance
Weather, service and long-term use
Patio openings often face weather and frequent household traffic. Compare flap package, cover use and how the pet route affects people using the same door.
Surface choice changes maintenance. Exterior walls and doors need periodic perimeter and water-management inspection. Screens need mesh tension and frame support checks. Glass installations should be watched for seal or panel issues by the appropriate trade. Every configuration benefits from clean magnets, flexible flaps, unobstructed cover tracks and a recorded model and size. When a flap no longer lies flat or a magnet misses its strike, correct the component or alignment before the gap becomes the normal operating condition.
Buying guidance
Mistakes to avoid
Do not let the pet door obstruct the slider, screen, active leaf, threshold or primary locking hardware.
A strong preflight is deliberately repetitive: measure again, check the dimensional label, compare both faces of the opening and read the exact manual. Confirm that the host door, wall, screen, glass or kennel panel remains safe and functional after the cutout. Record uncertainty instead of converting it into a guess. If structure, utilities, ratings, glass type or water management are unclear, pause the product decision and have the appropriate installer or trade verify the condition. That short review is less expensive than correcting an incompatible made-to-order frame.
Buying guidance
From a shortlist to an order-ready configuration
Move from shortlist to order only after four checks agree. The pet fits the clear opening; the building can accept the rough opening and full frame; the selected model matches the surface and thickness; and the flap, finish, cover and accessory choices match the intended use. Save the product page and model instructions with a labeled measurement sheet. For multiple openings, give each location its own ID and configuration. Review every line before submitting because made-to-order dimensions and options should not be inferred from another opening or corrected after fabrication begins.
Read the finished configuration back as a complete sentence before approving it: model family, named size or custom dimensions, measurement basis, frame finish, flap count, installation surface, finished thickness and mounting location. Then compare that sentence with the cart, worksheet and installer scope. This catches a correct measurement attached to the wrong model or a correct product attached to the wrong opening. When two pets share the door, confirm the widest body, tallest shoulder and lowest comfortable step-over still work together. Photograph the taped frame outline and keep that image with the order so the installer can verify placement before cutting.
Buying guidance
Save a service record for the installed door
Document the material and finished thickness the frame passes through, plus any tunnel pieces, flashing, compensation strips, stabilizers or fabricated glass information used in the installation. Photograph both faces and note the sealants and finish work completed. Surface details are easy to forget once the frame is in place, yet they matter when a leak, alignment issue or future renovation is investigated. A clear record helps the next repair preserve the original water, structural and operating assumptions.
Before submitting a made-to-order request, make sure the saved measurements tell one clear story: which pet was measured, what each dimension represents, where the door will be installed, and which options were selected. If the project requires a contractor or glass professional, keep that person’s verified construction dimensions beside the pet measurements so neither set is mistaken for the other. A complete record makes the order easier to confirm now and makes future flap, cover, lock or weather-strip service much easier.
Order-ready checklist
Five checks before a made-to-order purchase
Keep the measurement sheet, exact product page and installation manual together through ordering and installation.
- Photograph both sides of the location
- Identify material and complete thickness
- Map the rough opening and full frame
- Check structure, utilities and hardware
- Review the model installation manual
Decision summary
Compare the project from four angles
Primary decision
Identify the patio door as sliding glass, hinged glass, French door or solid panel before choosing between an in-glass frame and a compatible door-mounted model.
Fit check
Check pet clearance and the complete frame against glass edges, rails, stiles, locks, handles and the screen path.
Installation check
Glass requires a qualified glass professional; hinged panels require verified internal construction and enough flat area. Preserve egress and normal lock operation.
Ownership check
Patio openings often face weather and frequent household traffic. Compare flap package, cover use and how the pet route affects people using the same door.
Continue comparing
Related dog-door collections and guides
Common questions about dog doors for patio doors
What should I compare first when shopping dog doors for patio doors?+
Identify the patio door as sliding glass, hinged glass, French door or solid panel before choosing between an in-glass frame and a compatible door-mounted model. The defining question for Dog Doors for Patio Doors is what the frame will pass through and what must remain functional around it. A flap opening is only the pet passage; the installed frame occupies more room and may interact with structural members, door rails, glass edges, screen frames, locks, trim and weather seals. Compare the product’s rough opening and outer dimensions with a drawing or taped outline on both faces of the proposed location. If the outline crosses hardware, uneven panels or required edge clearances, change the location or model before ordering.
How do I know whether dog doors for patio doors will fit?+
Check pet clearance and the complete frame against glass edges, rails, stiles, locks, handles and the screen path. Check the clear flap opening for the pet, the rough opening for the cut and the tip-to-tip frame for the available mounting area.
What should an installer verify for dog doors for patio doors?+
Glass requires a qualified glass professional; hinged panels require verified internal construction and enough flat area. Preserve egress and normal lock operation. The exact product instructions and selected SKU should be available before any permanent opening is made.
How should I maintain dog doors for patio doors?+
Patio openings often face weather and frequent household traffic. Compare flap package, cover use and how the pet route affects people using the same door. Record the model and size, keep moving surfaces clean and replace only verified compatible service parts.
How do I choose the right pet door size?+
Measure from the floor to the top of your pet’s shoulders and measure the widest point of the body. The flap should generally sit about 1–2 inches above the shoulders, with a comfortable step-over height. Use the actual pet measurements rather than breed averages.
Are these pet doors made to order?+
Yes. Frame color, flap count, size and installation type are selected for your opening. Review the measurements and selected configuration carefully before submitting an order.
Can I replace the flaps later?+
Yes. Replacement flaps, flap kits, magnets, weather stripping, locks and covers are available. Match the replacement part to the original pet-door size and model.