Window replacement costs $400 to $1,500 per window installed, depending on the size, type, material, and brand. The window unit makes up 65% to 75% of the total cost, while labor makes up the other 25% to 35%.

Simple, single-hung windows and small picture windows cost the least to install, while large bay and bow windows cost the most.

Vinyl and aluminum are the least expensive and most common window materials. Wood window frames provide better insulation and an upscale look but cost more and are harder to maintain. Clad window frames are the most expensive option but last longer because they're made with vinyl-encased wood.

New windows are worth the investment if your home's existing windows are old, damaged, or if the windows are single-pane. Most new construction codes call for double-pane windows at a minimum due to the added energy efficiency. Installing new double-pane or triple-pane windows will reduce your energy costs and typically provides a 75% to 85% return on investment (ROI).

Installing windows takes 30 to 60 minutes per window, depending on the size, type, and accessibility. Large or ornate windows take longer to install than small, simple windows. Installers can work faster on first-story windows than they can on second-story ones.

Replacing a large bay window or bow window can take a full day, depending on how many panels it has.

Windows last 15 to 30 years on average, depending on the material and brand. Window warranties typically last 5 to 20 years, although some are covered for as long as you own your home. Consider replacing windows if you notice any of these signs:

• Difficulty opening or closing the window
• Visible damage, such as a rotting frame or cracked glass
• Condensation between window panes
• Drafts around the windows
• Increased energy bills
• The windows are more than 20 years old.

Professional window fitting companies, glaziers, or handymen install windows. Labor to install windows costs $100 to $1,000 per window on average, depending on if you hire a professional window service company or a handyman. Most companies and handymen charge lower rates per window when replacing all the windows in your home at the same time.

Popular companies that offer window installation and replacement services include Andersen, Pella, Marvin, Window World, Champion, Home Depot, and Lowe's.

Tipping window installers and other contractors is not required or expected. However, consider tipping $20 to $30 per person if you feel the installers went above and beyond.

Search our list of window installation contractors, then:

• Get three or more free estimates to compare. Confirm the estimates feature windows of the same type, material, and quality.
• Read reviews and browse previous work on HomeGuide and Google.
• Choose a licensed, bonded, and experienced company.
• Get a written estimate, contract, and warranty before work begins.
• Follow a payment schedule instead of making big payments up front.

After following the previous steps, hire the best window company in your area.

When hiring window installation companies near you, ask the following questions:

• How long have you been in business?
• Are you licensed, insured, and bonded?
• Do you have windows in stock? If not, how long will it take to ship them?
• What material or type of window would you recommend for this area?
• Does the estimate include the window, labor, new parts, and cleanup?
• How do you handle any damage or accidents that happen on the job?
• How long will this project take?
• Do you have any seasonal promotions or discounts?
• Do you offer a warranty for your work?
• Will you give me an estimate and contract in writing?