Pet Door Glass Installation: Options and Costs (2026)

Pet door glass installation costs $350 to $2,500 or more in the Colfax and Sierra Foothills area, depending on the installation type, pet door size, and glass configuration. A patio panel insert — the simplest option — runs $150 to $500 for the unit plus DIY installation or $350 to $700 with professional setup. An in-glass pet door, where a glazier fabricates a new tempered glass panel with the pet door built in, costs $700 to $2,500 including glass fabrication and professional installation. A full sliding glass door replacement with an integrated pet door runs $1,500 to $3,500 installed.

Those ranges come from 2026 pricing published by HomeGuide, Angi, and manufacturer dealer networks including Endura Flap and Security Boss, adjusted for Northern California labor rates. Placer County projects typically run 5 to 15 percent above national averages due to higher labor costs and foothill delivery logistics.

I'm John, owner of Colfax Glass at 226 N Auburn St in Colfax, CA. I've been installing glass for pet doors across the Sierra Foothills for over 25 years — from Auburn and Grass Valley down to Rocklin and Roseville. Pet door installation in glass is one of the most common requests I get from homeowners with dogs, and the decision tree is simpler than most people think once you understand the three main options. This guide covers each installation type, what it costs, how to size a pet door for your dog, and the exact questions to ask before hiring a glazier.

Can you put a pet door in a sliding glass door? Yes — and you have three distinct options, each with different cost, complexity, and performance tradeoffs. The right choice depends on your budget, whether you own or rent, how important energy efficiency is, and whether your existing door and frame are in good condition.

Understanding these three approaches before you call a glazier or start shopping online saves you from buying the wrong product or overpaying for installation you don't need.

A patio panel insert is a tall, narrow panel — usually aluminum or vinyl framed with a single- or dual-pane glass section and a pet flap at the bottom — that slides into the track of your existing sliding glass door. The insert sits in the space where the sliding panel would normally travel, and a C-clamp or security lock holds the sliding panel in its new position against the insert.

This is the most popular option for homeowners who want a pet door without permanent modification. It is also the only option that works for renters, since you can remove the insert and restore the original door configuration when you move out. According to Pet Door Products, basic panel inserts run $150 to $500 for the unit, with higher-end insulated versions reaching $600 to $800.

The tradeoff is reduced door opening width. A standard panel insert is 8 to 12 inches wide, which means your usable door opening shrinks by that amount. For a standard 6-foot sliding door with a 3-foot opening, you lose roughly 15 to 25 percent of your walkthrough space. That matters if you move furniture through the door regularly or use it as a primary entry point.

Energy efficiency is the other compromise. Single-pane panel inserts with basic flaps create a noticeable draft in the Sierra Foothills climate, especially during winter when overnight lows drop below freezing. Dual-flap, insulated panel inserts from manufacturers like Endura Flap perform significantly better, but they cost $400 to $800 — closing the price gap with in-glass options.

An in-glass pet door is the cleanest, most permanent installation option. A professional glazier removes one of the existing glass panels from your sliding door frame, fabricates a new tempered glass panel with a factory-cut opening for the pet door unit, and installs the new panel into the existing frame. The pet door sits flush with the glass surface, and the full width of the door opening is preserved.

This is not a DIY project. Modern sliding glass doors use tempered safety glass, which cannot be cut after tempering — it will shatter into thousands of small pieces. The pet door opening must be cut into the glass before the tempering process, which means the panel must be fabricated from scratch at a glass plant. That fabrication step is what drives the cost above panel inserts.

The total installed cost for an in-glass pet door runs $700 to $2,500, broken down roughly as follows: the pet door unit itself costs $200 to $600 depending on size, brand, and flap quality; custom glass fabrication of a new tempered panel with the cutout runs $300 to $1,200 depending on panel size, glass type, and coatings; and professional installation runs $200 to $700 including removal of the old panel, fitting the new one, and sealing.

Manufacturers like Security Boss, Endura Flap (Pet Door Guys "In The Glass" line), and Hale Pet Door all make in-glass pet door units designed to be installed into a custom-fabricated glass panel. Lead time for the glass fabrication is typically 2 to 5 weeks, since each panel is made to order based on your exact door dimensions.

The third option is to replace the entire sliding glass door unit — frame, track, glass panels, rollers, and hardware — with a new door that has a pet door factory-integrated into one of the panels. This is the most expensive path at $1,500 to $3,500 installed, but it makes sense in two specific situations.

First, if your existing sliding glass door is already showing signs of failure — worn-out rollers, a bent track, corroded frame, or foggy glass from failed seals — adding a pet door to a dying door is throwing money at a temporary fix. You are better off replacing the whole unit and getting the pet door built in from the factory.

Second, if you are doing a broader remodel that includes the patio door area, a new door with an integrated pet door eliminates the need for custom glass fabrication as a separate step. Major door manufacturers including Milgard, Andersen, and JELD-WEN offer pet door options in their sliding glass door lines, or their dealer networks can configure pet door add-ons during the order process.

The patio door glass replacement cost guide covers full door replacement pricing in more detail. The pet door add-on typically adds $200 to $500 to the base price of the door unit.

The table below puts all three options side by side so you can compare total cost, timeline, and key tradeoffs at a glance. These are 2026 installed prices for the Colfax and Sierra Foothills market, where labor rates and material delivery costs run slightly higher than the Sacramento Valley floor.

For most homeowners with a sliding glass door in good condition, the in-glass pet door is the best balance of cost, appearance, and long-term performance. If budget is the primary constraint or you rent, a premium insulated panel insert gets the job done. If the door itself needs replacing, fold the pet door into a full replacement.

Sizing the pet door correctly is critical — a door that is too small forces your dog to crouch and can cause joint strain over time, while a door that is too large wastes energy and may allow unwanted animals inside. The flap opening needs to be at least 2 inches wider than your dog's widest point (usually the chest or shoulders) and at least 1 inch taller than the distance from the top of your dog's shoulders (the withers) to the ground.

The sizing chart below is based on data from Glass Doctor, PetSafe, and Endura Flap. Measure your actual dog — breed ranges vary widely based on individual size, weight, and build.

The Colfax area sits at roughly 2,400 feet elevation along the I-80 corridor, and the climate puts specific demands on pet door installations that differ from the Sacramento Valley floor or coastal areas. According to Weather Spark, Colfax sees a 52-degree seasonal temperature spread — summer highs near 89 degrees and winter lows near 37 degrees — with daily swings of 30 to 40 degrees common in spring and fall.

That kind of thermal range means the pet door flap is a direct thermal bridge between your conditioned interior and the outside air. A single-flap vinyl pet door in a panel insert acts like an uninsulated hole in your wall during a January cold snap. Dual-flap designs with magnetic seals close that gap significantly, and in-glass installations with insulated pet door units perform the best.

Wildlife is the other climate-adjacent factor. The Sierra Foothills are home to raccoons, skunks, possums, and the occasional coyote — all of which can and will enter through an unsecured pet door. Electronic pet doors with microchip or RFID collar activation solve this problem by only unlocking for your registered pet. Microchip-activated units add $100 to $300 to the pet door cost but are worth serious consideration for any Sierra Foothills home where the patio door faces open space or a wooded area.

Snow loading is a seasonal consideration for panel inserts. A panel insert that sits in the door track at ground level can get iced in during winter storms, making the sliding panel difficult to operate. In-glass installations avoid this issue entirely since the pet door is elevated within the glass panel itself, typically 8 to 16 inches above the threshold.

Not every glass shop handles pet door installations, and the ones that do vary widely in experience with this specific type of work. Pet door glass fabrication requires precise cutout tolerances, correct placement within the panel, and familiarity with the pet door unit's mounting system. Here are the questions that separate an experienced pet door glazier from one who is figuring it out on your job.

These questions apply specifically to in-glass pet door installations, which involve custom glass fabrication. Panel inserts are straightforward enough for DIY installation and do not require a glazier.

Sliding glass doors are the most common location for pet door glass installation, but they are not the only option. Pet doors can be installed in several other glass surfaces around your home, though the process and cost vary.

French doors can accommodate in-glass pet doors using the same fabrication process as sliding doors. The glazier replaces one of the glass panels (or lites) in the French door with a new tempered panel that includes the pet door cutout. For French doors with true divided lites, the pet door typically replaces one of the lower lites — which limits the maximum pet door size to the lite dimensions.

Fixed glass panels and sidelights adjacent to entry doors can also receive in-glass pet doors. This is a smart option if you do not want to cut into your front or side entry door itself. The sidelight glass is replaced with a new tempered panel that includes the pet door.

Glass partitions and interior glass walls can incorporate pet doors for indoor pet access — useful for separating pet areas from the rest of the house without blocking light.

Window-mounted pet doors are possible for ground-floor windows but are less common because windows are typically smaller and higher off the ground than doors. The step-over height from a window-mounted pet door may be too high for comfortable use unless the window extends close to the floor.

Panel inserts are the one pet door option that genuinely works as a DIY project. You slide the insert into the door track, secure it with the included C-clamp or lock, and you are done. No tools beyond a screwdriver, no glass cutting, no permanent modification. If your existing door is standard-sized and the track is clean and level, a handy homeowner can install a panel insert in 30 to 60 minutes.

In-glass pet doors require a professional glazier — full stop. Tempered glass cannot be cut after the tempering process. Attempting to drill or cut tempered glass will cause it to shatter explosively into small fragments. The glass panel must be ordered with the pet door cutout pre-cut before tempering, fabricated to your exact dimensions. This is specialized custom glass work that requires precise measurements, correct specifications on the fabrication order, and proper installation technique to seat the new panel in the existing frame.

Full door replacement also requires professional installation. Hanging a sliding glass door involves leveling the frame in the rough opening, adjusting rollers, setting the glass panels, and sealing the perimeter — the same process as any patio door replacement but with the added complexity of integrating the pet door unit.

The risk of getting the in-glass option wrong is not just wasted money on a mis-cut panel. An improperly measured or fabricated panel may not fit the frame, may not seal correctly against weather, or may create stress points that lead to glass failure. When the cost of the glass panel alone runs $300 to $1,200, the $200 to $700 for professional installation is money well spent.

Pet door glass installations touch two warranty and insurance areas that homeowners should understand before starting the project.

Homeowners insurance typically covers glass damage from covered perils (storms, vandalism, accidental breakage) but does not cover modifications you make to the glass. If you install an in-glass pet door and the panel later cracks due to a manufacturing defect, your claim would go through the glazier's workmanship warranty and the glass manufacturer's product warranty — not your homeowners policy. However, if a tree branch breaks your pet door panel during a storm, that is a covered peril under most policies. Make sure your agent knows you have modified the patio door glass so the panel's replacement value is accurately reflected in your coverage.

The pet door unit itself carries a manufacturer warranty that varies by brand. Security Boss offers a limited lifetime warranty on their MaxSeal units. Endura Flap provides a 15-year warranty on flaps and a limited lifetime warranty on frames. Hale Pet Door offers a 5-year warranty. These warranties cover the pet door unit, not the glass panel it is installed in.

The glass panel should carry a separate warranty from the fabricator and the installing glazier. At Colfax Glass, we warranty our glass fabrication and installation workmanship. The tempered glass itself is warrantied by the glass manufacturer against spontaneous breakage from nickel sulfide inclusions (a rare manufacturing defect).

These are the questions I hear most often from homeowners across the Sierra Foothills when they are considering a pet door in their sliding glass door or other glass surface.