The main places to buy a sliding patio door
You can order a sliding patio door from a home improvement store, a window and door specialty shop, a big-box retailer, or directly from a manufacturer. Each route has different costs, installation options, and timelines. Home Depot and Lowe's stock standard sizes in-store and can order custom sizes; Andersen, Pella, and Marvin sell through their own showrooms and authorized dealers; local window shops often offer the most personalized measurement and installation; and online retailers like Amazon and Wayfair carry budget options but usually don't install.
The choice depends on whether you want the door installed professionally, how quickly you need it, and your budget. A specialty dealer or manufacturer showroom will measure your opening and handle installation as part of the sale. A big-box store will sell you the door and connect you with installers, but you coordinate separately. Ordering online is cheapest but means you arrange everything yourself.
Key Takeaways
- Home Depot, Lowe's, and local window shops can measure your opening and arrange professional installation as part of the order.
- Manufacturer showrooms (Andersen, Pella, Marvin) typically cost more but offer the widest range of styles and custom options.
- Big-box retailers stock common sizes but custom orders take 4 to 8 weeks; specialty shops often have faster lead times for standard sizes.
- Online retailers are cheapest but require you to arrange delivery and installation yourself, and returns are harder if the door doesn't fit.
- Always have a professional measure your opening before ordering—a door that is even half an inch too wide or narrow will not install.
Home improvement stores: Home Depot and Lowe's
Home Depot and Lowe's carry sliding patio doors in standard sizes (typically 5 feet to 8 feet wide) in stock or available to order. Both stores offer in-home measurement services—a representative will come to your house, measure the opening, and confirm the door will fit. You can also measure yourself and order online for pickup or delivery. Both stores have partnerships with local installers, so you can add installation to your order at checkout.
Standard sizes ship in 1 to 2 weeks. Custom sizes (narrower, taller, or with specific frame colors) take 4 to 8 weeks. Installation typically costs $200 to $500 depending on your location and whether the old door needs removal. Home Depot and Lowe's doors range from budget vinyl models ($300–$600) to mid-range fiberglass or wood-clad options ($800–$1,500). Both stores offer financing options if you open a store credit card.
Manufacturer showrooms and authorized dealers
Andersen, Pella, and Marvin are the largest manufacturers. They sell through their own showrooms and through authorized local dealers. A showroom visit lets you see the doors in person, compare frame materials (vinyl, fiberglass, wood-clad aluminum), and discuss glass options (single-pane, double-pane, low-E coatings for energy efficiency). The salesperson will also refer you to a local installer or handle installation directly.
Manufacturer doors cost more than big-box options—typically $1,000 to $3,000 for the door alone—but come with longer warranties (often 10 to 20 years) and more customization. Lead times are usually 6 to 10 weeks for custom orders. Installation through the manufacturer's network is often more expensive ($400–$800) but includes a warranty on the work. To find a showroom or dealer near you, visit the manufacturer's website and use their dealer locator.
Local window and door shops
Independent window and door retailers in your area often have the fastest service for standard sizes and the most detailed information about what will work in your climate. They measure your opening, discuss your needs (noise reduction, energy efficiency, security), and order from multiple manufacturers so you are not locked into one brand. Many stock common sizes and can install within days of ordering.
Prices at local shops are usually between big-box and manufacturer showroom costs—$600 to $2,000 for the door plus installation. The advantage is that the same person who measures and sells you the door often supervises the installation, so there is less chance of miscommunication. To find a shop near you, search "window and door dealer near me" or ask your neighbors or a local contractor for a recommendation.
Online retailers and budget options
Amazon, Wayfair, and other online retailers sell sliding patio doors at the lowest prices—often $300 to $800—but with important limits. These doors are usually basic vinyl models with standard dimensions. The retailer does not measure your opening or arrange installation; you handle both yourself. Shipping is usually free, but delivery takes 1 to 3 weeks, and the door arrives at your house, not at a job site.
Online ordering makes sense only if you are confident about your measurements and plan to install the door yourself or hire a contractor separately. If the door arrives and does not fit, returns are slow and expensive—you may have to pay return shipping. Read reviews carefully; budget doors sometimes have loose frames or poor seals that let in drafts. If you go this route, measure twice and confirm the rough opening size (the hole in the wall) before ordering.
What to know before you order
The most common mistake is ordering a door that does not fit. The rough opening—the hole in your wall where the door goes—is what matters, not the finished door size. A door that is too wide or too tall will not fit; one that is too small will have large gaps around the frame. Always measure the rough opening in three places (top, middle, bottom for width; left, center, right for height) because walls are often not perfectly square.
If you are unsure about your measurements, pay for a professional measurement. Home Depot and Lowe's offer this for free if you order from them. Local shops and manufacturers usually measure for free as part of the sales process. If you order online, you can hire a handyman or contractor to measure for $50 to $150—much cheaper than ordering a door that does not fit. Also decide whether you want the old door removed and disposed of before the new one arrives. Most installers include removal, but confirm this when you order. If you are removing the old door yourself, do it at least a day before installation so the opening is clear and the installer can see any damage to the frame that needs repair.
Comparing cost, speed, and installation
The table below shows how the four main ordering routes compare on price, how long the door takes to arrive, and whether installation is included in the order. Use this to narrow down which option fits your timeline and budget.
| Source | Price Range | Lead Time | Installation Included |
|---|---|---|---|
| Home Depot / Lowe's | $300–$1,500 | 1–8 weeks | Yes, $200–$500 |
| Manufacturer Showroom | $1,000–$3,000 | 6–10 weeks | Yes, $400–$800 |
| Local Window Shop | $600–$2,000 | 3–6 weeks | Yes, $300–$600 |
| Online Retailer | $300–$800 | 1–3 weeks | No, arrange separately |
Home Depot and Lowe's offer the best balance of speed and cost for most homeowners. Manufacturer showrooms are worth the wait and extra cost if you want specific styles or energy-efficient glass. Local shops are ideal if you need the door installed quickly and want personalized information. Online retailers work only if you are comfortable measuring and coordinating installation on your own.
Frequently Asked Questions
Can I install a sliding patio door myself?
You can if you have carpentry experience and the right tools, but most people should hire a professional. Installation involves removing the old door, checking that the opening is square and level, shimming the frame, sealing gaps, and adjusting the rollers so the door slides smoothly. A mistake in any step can cause the door to stick, leak, or fail to close properly. Professional installation usually costs $200 to $800 and comes with a warranty on the work.
What is the difference between a sliding patio door and a French patio door?
A sliding patio door has two panels; one slides horizontally past the other. A French patio door (also called a hinged or swing door) has two panels that swing open like regular doors. Sliding doors take up less space when open and are easier to operate for people with limited strength. French doors look more traditional and let you open just one side. Both are available from the same retailers.
How long does a sliding patio door last?
A well-maintained vinyl or fiberglass sliding patio door lasts 20 to 30 years. Wood-clad doors last 15 to 25 years if the exterior wood is painted or stained regularly. The rollers and seals wear out first and can be replaced for $100 to $300 without replacing the whole door. Cleaning the track and lubricating the rollers twice a year extends the life.
Do I need a permit to replace a patio door?
Most cities require a permit for any exterior door replacement because the inspector checks that the new door meets current building codes for energy efficiency and safety. Permits usually cost $50 to $200 and take 1 to 2 weeks. If you order from Home Depot, Lowe's, or a local shop, they often handle the permit as part of the installation. If you order online and hire your own installer, confirm that the installer will pull the permit.
What should I look for in a sliding patio door?
Check the frame material (vinyl is low-maintenance; wood-clad looks better but needs painting), the glass (double-pane is standard; low-E coating reduces heat gain in summer and heat loss in winter), and the rollers (ball-bearing rollers are smoother and last longer than standard ones). Read reviews about how smoothly the door slides and whether it seals well. A door that is hard to open or lets in drafts will frustrate you for years.