How much does a dog door cost?

Basic flap door: $30-$80. Insulated pet door: $50-$200. Electronic/smart door: $150-$500. Sliding door insert: $100-$400. Wall-mounted (product + professional installation): $300-$800. Professional installation for a door-mounted unit: $75-$200 additional. The most popular option: a $50-$150 insulated pet door self-installed in a wood exterior door.

How do I measure my dog for a pet door?

Measure shoulder height (floor to top of shoulders/withers). The flap opening should be at least 1-2 inches taller than this measurement. Measure the widest point (chest or hips) and add 1-2 inches for width. The bottom of the flap should be roughly 1/3 of your dog's shoulder height above the floor. When in doubt: go one size up. A pet door that is slightly too large is fine; one that is too small is a problem.

Are dog doors a security risk?

A small or medium pet door (for dogs under 40-50 lbs) is generally not a security concern — a person cannot fit through it. Large and extra-large doors (for dogs 80+ lbs) are large enough to be a potential entry point. Mitigation: use an electronic/smart door that locks when not activated by your pet, use the locking panel when away or at night, install in a less visible location, and consider the visibility from the street.

Can I install a dog door in a rental?

A sliding glass door insert panel is the perfect solution for renters: it requires no cutting or permanent modification. The panel fits in the sliding door track and can be removed when you move out. Cost: $100-$400. For permanent door installations: get written landlord permission, and budget to replace the door when you move ($150-$400 for a new slab door).

Article

Woodworking & Lumber

Dog Door Installation Guide: Types, Sizing & Costs

Lumberama Editorial Team, Home Improvement & Pet-Friendly Living Specialists Jun 10, 2026 11 min read

Dog Door Types

Door-Mounted

Installed directly in an existing exterior door. Most common type. Cut a hole in the door and mount the pet door frame. Works with wood, fiberglass, and some metal doors. Reversible (remove and patch the door or replace it when moving). $30-$300 (product) + $0-$200 installation. DIY-friendly for wood doors.

Wall-Mounted

Installed through an exterior wall. More complex installation (framing, insulation, and siding must be addressed). Best for: thick walls, homes where you do not want to modify a door, or when no door is in the ideal location. Requires a tunnel/sleeve through the wall. $100-$500 (product) + $200-$500 professional installation. Not typically DIY.

Sliding Glass Door Insert

A panel that fits into the track of a sliding glass door. No cutting, no permanent modification. The pet door is built into the panel. Easy to install and remove (renter-friendly). $100-$
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The panel reduces the opening width of the sliding door. Best for: renters, homeowners who do not want permanent modifications.

Electronic/Smart Pet Door

Unlocks only for your pet (via microchip, RFID collar tag, or app). Keeps stray animals and wildlife out. Locks automatically when your pet is inside. $150-$
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Requires batteries or wired power. Brands: SureFlap, PetSafe SmartDoor, High Tech Pet. Best for: security-conscious homeowners, multi-pet households, areas with wildlife.

Sizing

Measure your pet: height from the floor to the top of the shoulders (withers). The pet door flap should be at least 1-2 inches taller than this measurement. Width: at least as wide as the widest part of your pet (usually chest or hips) plus 1-2 inches. Bottom of the flap should be no more than 1/3 of the pet’s shoulder height from the floor (too high and they have to jump, too low and they have to crouch).

Typical sizes: Small (cats, small dogs under 15 lbs): 6x7 to 8x10 inches. Medium (15-40 lbs): 8x12 to 10x15 inches. Large (40-80 lbs): 10x17 to 12x18 inches. Extra large (80+ lbs): 12x20 to 16x24 inches.

Security Concerns

Pet doors can be a security vulnerability. Mitigation: electronic/smart doors that lock when not in use. Locking panels (most pet doors include a slide-in cover for nighttime or when away). Location: install in a door that is not easily visible from the street. Size: do not install a pet door large enough for a person to crawl through (extra-large doors for giant breeds are the highest risk). Security-rated pet doors (reinforced, double-flap, magnetic sealing) are available.

Installation (Door-Mounted, DIY)

Choose the location on the door (centered, correct height).
Trace the template (included with the pet door).
Drill corner holes.
Cut with a jigsaw (wood door) or appropriate cutting tool.
Test fit the frame.
Install the frame (screws through the door from both sides).
Attach the flap.
Seal edges with weatherstripping or silicone. Time: 1-2 hours. Difficulty: easy to moderate (wood doors). Replacing the door later if you move: $150-$400 for a new slab door.