20 Best Window Companies in Discovery Bay, CA (2023 Reviews)

Looking to improve your house's insulation? The best window replacement companies can help.

We analyzed all the top-rated window companies in Discovery Bay and selected the best 20 based on:

  • Customer reviews
  • Window installation expertise
  • Popularity with home-owners like you
EcoWatch Local Advisors

By EcoWatch Local Advisors

Updated September 15, 2023

Why you can trust EcoWatch

Our panel of energy experts work tirelessly to create unbiased reviews and informative content to help homeowners make educated decisions. No other windows site has covered energy efficiency and sustainability as long as EcoWatch, which means we're going to help you find windows replacements that will save on your energy bill and put more money back in your wallet.

Although green energy sources like wind and solar are important when it comes to decreasing your carbon footprint, improving your home's energy efficiency can also have a considerable impact on home energy conservation. According to the Department of Energy, heat or cool air lost through traditional, outdated windows could make up 25-30% of heating and cooling usage.

Replacement windows improve your home's insulation, not only making you more comfortable during extreme temperatures, but also saving you some money and helping the environment.

We've made a guide on the top installation companies to help you in your search, so you can not only enjoy brand new windows, but also save money on your power bills.

Best Availability

Renewal by Andersen

★★★★★
4.5

  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house

Best Energy-Efficient Features

Champion

★★★★★
4.5

  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty

Window Veteran

Window World

★★★★★
4.5

  • EnergyStar Partner
  • Wide variety of products and services
  • Lifetime Warranty

Best Window Installation & Replacement Companies in Discovery Bay

The EcoWatch team researched dozens of installers that serve the Discovery Bay area to find the top window installation companies by our standards. The companies in this article passed our review standards for energy-efficient offerings as well as local expertise, price, customer service and beyond.

Window World logo
FAST QUOTE
as little as 30 seconds
Best Affordability

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Large serice area
  • Pros icon Low prices relative to competitors
  • Pros icon Great industry reputation
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Quality of service will depend on your area

Window World has windows expertise in Discovery Bay. Window World has been in the window installation business for about 27 years. The provider has plenty of positive reviews from customers on online review websites.

Window World may be the company for you if you're interested in one that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.

Energy Efficiency of Window World Windows

Window World carries some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to mention that you want high-quality Energy Star windows when inquiring. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.

How much does Window World cost in Discovery Bay?

Window World doesn’t have any pricing information available on its website, but it's known for offering some of the most affordable window installations around. If you’d like more accurate pricing information, you can get a quote on the company’s website.

Milgard Windows & Doors logo
FAST QUOTE
as little as 30 seconds
Excellent Reputation

Milgard Windows & Doors

★★★★★
BBB Rating: A
Locations: West Coast
Founded: 1962
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Wide network of installers
  • Pros icon Lifetime warranty available
Cons:
  • Pros icon Entails hiring third-party contractors
  • Pros icon Limited additional services

Milgard Windows & Doors is a family-owned and -operated window replacement company, which primarily serves the West Coast. Milgard has around 60 years of experience in the window installation industry.

Milgard may be the company for you if you're looking for one that offers competitive pricing, a comprehensive warranty and installers that all have a minimum of 15 years of window installation experience.

Energy Efficiency of Milgard Windows & Doors Windows

There are a wide variety of window types available from Milgard Windows & Doors, some of which are Energy Star products. The company manufactures its own products, which gives it the freedom to make custom windows based on the climate. The company designs its own vinyl compounds and profiles to ensure a heat-stable product that performs as advertised.

How much does Milgard Windows & Doors cost in Discovery Bay?

Prices are not available on Milgard’s website, as the cost of window replacement differs based on how many and what type(s) of windows you need. However, it offers different kinds of windows at varying price points. If you’d like to know for sure, you can get a quote on the company’s website.

Renewal by Andersen logo
FAST QUOTE
as little as 30 seconds
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty
  • Pros icon More expensive than competition

Renewal by Andersen has the best availability in Discovery Bay. Andersen has been in the window installation business for about 27 years. The provider has plenty of positive reviews from customers on online review websites.

Andersen may be the company for you if you're interested in one that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started.

Energy Efficiency of Renewal by Andersen Windows

Renewal by Andersen carries some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to mention that you want high-quality Energy Star windows when inquiring. A handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019.

How much does Renewal by Andersen cost in Discovery Bay?

Andersen doesn’t have any pricing information available on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. If you’d like more accurate pricing information, you can get a quote on the company’s website.

Universal Windows Direct logo
FAST QUOTE
as little as 30 seconds
Best Warranty

Universal Windows Direct

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 2002
Pros:
  • Pros icon Makes charitable contributions
  • Pros icon Manufactures products in-house
  • Pros icon Wide variety of products and services
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Limited service area
  • Pros icon Some installations carried out by third-party contractors
  • Pros icon Quality of service will depend on your area

Universal Windows Direct is a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. This company has 20 years of experience in the window installation industry, and it has proved to be one of the most reputable companies in Discovery Bay. The provider has plenty of positive reviews from customers on online review websites.

Universal may be the company for you if you're interested in one that has an industry-leading warranty covering products, parts and workmanship for life.

Energy Efficiency of Universal Windows Direct Windows

Universal Windows Direct caters to eco-conscious consumers by providing energy-efficient window offerings. The company offers energy-efficient UniShield brand windows. According to its website, UniShield window packages have higher gas fill rates and longer gas retention than most other brands on the market, and they are Energy Star products.

How much does Universal Windows Direct cost in Discovery Bay?

Prices aren’t mentioned on Universal’s website, but installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. You can inquire about a free quote on its website for more information about pricing.

We strive to remain unbiased and transparent by including pros and cons for each company we review. Additionally, our rankings are not affected by any partnerships.

More Window Companies in Discovery Bay

Renewal by Andersen of San Francisco

Hayward, CA
4.4
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Commercial Windows
  • Service icon Stained Glass
  • Service icon Glass Showers
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Sliding Glass
  • Service icon Bay Windows
  • Service icon Double-Hung
  • Service icon Window Replacement

Website: https://www.renewalbyandersen.com/window-company/890-san-francisco-ca/retailer
Address: 30806 Santana St, Hayward, CA 94544
Phone: (510) 803-3110

Window World of Greater Sacramento

Sacramento, CA
4.4
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Free assessment

Services Offered

  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Window Replacement
  • Service icon Glass Showers
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Fast Delivery
  • Service icon Bay Windows

Website: https://www.windowworldsacramento.com/
Address: 9777 Business Park Dr Suite B, Sacramento, CA 95827
Phone: (916) 461-8705

The Glass Guru

Antioch, CA
4.4
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

  • Service icon Window Replacement
  • Service icon Sliding Glass
  • Service icon Stained Glass
  • Service icon Window Repair
  • Service icon Commercial Windows
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Tempered Glass
  • Service icon Full-Service Installations
  • Service icon Double-Hung
  • Service icon Glass Showers
  • Service icon Aluminum Window Frames

Website: https://theglassguru.com/locations/brentwood-ca/
Address: 2220 A St Suite A, Antioch, CA 94509
Phone: (925) 690-1947

Brentwood Glass Shower and Window Company

Brentwood, CA
3.4
★★★★★
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Full-Service Installations
  • Service icon Fast Delivery
  • Service icon Window Replacement
  • Service icon Double-Hung

Website: https://brentwoodglasscompany.com/
Address: 420 Beatrice Ct g2, Brentwood, CA 94513
Phone: (925) 634-9029

Antioch Glass

Antioch, CA
3.8
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Showers
  • Service icon Window Repair
  • Service icon Commercial Windows
  • Service icon Custom Window Designs
  • Service icon Sliding Glass
  • Service icon Residential Windows
  • Service icon Tempered Glass
  • Service icon Window Replacement

Website: http://antiochglass.net/
Address: 1207 Auto Center Dr, Antioch, CA 94509
Phone: (925) 777-9191

Stockton Window Replacement

Stockton, CA
4.2
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Residential Windows
  • Service icon Double-Hung
  • Service icon Fast Delivery
  • Service icon Custom Window Designs
  • Service icon Window Replacement
  • Service icon Commercial Windows
  • Service icon Bay Windows
  • Service icon Sliding Glass

Website: https://bestexteriors.net/windows/
Address: 1625 W March Ln #200, Stockton, CA 95207
Phone: (916) 386-2621

Home Services at The Home Depot

Tracy, CA
3.2
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Showers
  • Service icon Window Replacement
  • Service icon Stained Glass
  • Service icon Residential Windows
  • Service icon Commercial Windows
  • Service icon Custom Window Designs
  • Service icon Fast Delivery

Website: https://www.homedepot.com/l/Tracy/CA/Tracy/95304/1020/services
Address: 2461 Naglee Rd, Tracy, CA 95304
Phone: (209) 226-4134

Window Replacement Stockton

Stockton, CA
4.2
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay Windows
  • Service icon Window Replacement
  • Service icon Custom Window Designs
  • Service icon Fast Delivery
  • Service icon Commercial Windows
  • Service icon Residential Windows

Website: http://bestexteriors.net/
Address: 42 N Sutter St #310F, Stockton, CA 95202
Phone: (916) 399-5707

Tracy Glass Shop

Tracy, CA
4.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Commercial Windows
  • Service icon Window Replacement
  • Service icon Custom Window Designs
  • Service icon Bay Windows
  • Service icon Residential Windows
  • Service icon Glass Showers
  • Service icon Fast Delivery

Website: http://tracyglassshop.com/
Address: 3402 Mars Ct suite 108, Tracy, CA 95376
Phone: (209) 835-1472

Reborn Cabinets Inc.

Livermore, CA
4.3
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Custom Window Designs
  • Service icon Glass Showers
  • Service icon Fast Delivery
  • Service icon Residential Windows
  • Service icon Commercial Windows
  • Service icon Window Replacement
  • Service icon Double-Hung

Website: https://www.reborncabinets.com/location/livermore/
Address: 1306 Stealth St a, Livermore, CA 94551
Phone: (408) 359-4093

Sears Heating and Air Conditioning

Livermore, CA
3.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Custom Window Designs
  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Window Replacement

Website: https://www.searshomeservices.com/locations/hi/hvac/ca/livermore
Address: 283 E Airway Blvd, Livermore, CA 94551
Phone: (925) 255-1593

Custom Exteriors, Inc

Pleasanton, CA
4.3
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Full-Service Installations
  • Service icon Fast Delivery
  • Service icon Residential Windows
  • Service icon Bay Windows
  • Service icon Window Replacement
  • Service icon Custom Window Designs
  • Service icon Sliding Glass

Website: https://www.custom-exteriors.com/
Address: 2142 Rheem Dr ste e, Pleasanton, CA 94588
Phone: (888) 957-7800

Cal Coast Window & Door

Pleasanton, CA
4.3
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Full-Service Installations
  • Service icon Residential Windows
  • Service icon Energy-Efficient Options
  • Service icon Sliding Glass
  • Service icon Window Replacement
  • Service icon Custom Window Designs
  • Service icon Bay Windows

Website: https://calcoastwindows.com/
Address: 5673 W Las Positas Blvd Suite 203, Pleasanton, CA 94588
Phone: (925) 398-8184

APW Window Replacement

Pleasanton, CA
4.1
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Commercial Windows
  • Service icon Bay Windows
  • Service icon Double-Hung
  • Service icon Window Repair
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Window Replacement

Website: https://apwwindows.com/
Address: 3109 Camdon Ct, Pleasanton, CA 94588
Phone: (773) 818-4400

Delta Glass Co

Stockton, CA
3.9
★★★★★
  • Pros icon Price Transparency

Services Offered

  • Service icon Commercial Windows
  • Service icon Glass Showers
  • Service icon Custom Window Designs
  • Service icon Window Replacement
  • Service icon Residential Windows

Website: https://deltaglassco.com/
Address: 3005 E Main St, Stockton, CA 95205
Phone: (209) 466-5581

Green Technology Windows and Doors

Manteca, CA
3.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Commercial Windows
  • Service icon Residential Windows
  • Service icon Window Replacement
  • Service icon Bay Windows
  • Service icon Custom Window Designs

Website: https://www.greentechwindows.com/
Address: 1715 Winchester Dr, Manteca, CA 95336
Phone: (888) 658-5080

Quality Windows & Doors

Pleasanton, CA
4.2
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Bay Windows
  • Service icon Window Replacement
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Glass Showers
  • Service icon Full-Service Installations
  • Service icon Residential Windows

Website: https://www.qwdwindowsanddoors.com/
Address: 3732 Stanley Blvd Ste B, Pleasanton, CA 94566
Phone: (925) 484-1747

Windows & Beyond

Concord, CA
4.2
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement
  • Service icon Bay Windows
  • Service icon Double-Hung
  • Service icon Commercial Windows
  • Service icon Energy-Efficient Options
  • Service icon Residential Windows
  • Service icon Glass Showers
  • Service icon Custom Window Designs

Website: http://www.windowsandbeyond.net/
Address: 1027 Shary Ct, Concord, CA 94518
Phone: (925) 689-6600

Custom Exchange Windows

Pleasanton, CA
4.1
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

  • Service icon Window Replacement
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Energy-Efficient Options
  • Service icon Sliding Glass
  • Service icon Bay Windows

Website: http://www.customexchangeinc.com/
Address: 6873 Herrin Ct, Pleasanton, CA 94588
Phone: (855) 225-6999

Don's Mobile Glass, Inc.- Manteca

Manteca, CA
4.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Double-Hung
  • Service icon Window Replacement
  • Service icon Custom Window Designs
  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Commercial Windows

Website: http://www.donsmobileglass.com/
Address: 151 S Main St, Manteca, CA 95336
Phone: (209) 823-7678
Discovery Bay Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Discovery Bay, CA using our customized window cost calculator.

Estimated Window Cost:
161 homeowners have requested a free estimate in the last 3 days.

Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.

How Installing Energy-Efficient Windows in Discovery Bay Saves You Money

Upgrading to energy-efficient windows can help improve the comfort of your home and help you save on electricity bills. Here are more details about how switching out your windows could help you:

  • Protect your valuables: The low-emissivity coatings on many Energy Star certified windows help prevent your floors, carpets and furniture from fading by filtering out UV rays.
  • Better temperature control in your home: When you reside in a city like Discovery Bay where the winters can be chilly, you usually need to rely on your heater to keep your house warm. Energy-efficient windows can lower the amount of heat lost through your windows when heating your home.
  • Save on power bills: Switching to energy-efficient windows reduces your energy bills by about 12% because you need less energy.
  • Protect your investment: The older your home is, the more likely it is that getting new windows will benefit you. Older homes tend to have windows that are outdated, leaky or potentially even damaged in some way. Updating your windows could help raise the value of your home if you decide to sell.

Estimated Cost of Window Replacement in Discovery Bay

When looking into window installation, each company offers varying services and prices. Let's take a look at some average costs and services.

How Much Do New Windows Cost?

Generally, homeowners in Discovery Bay can expect that most replacement window installations will range from $250 to $1,200, with the most common installations sitting at around $600. But costs vary remarkably depending on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window installers also provide door installations and replacements, which will make your project cost more.

It's important to keep in mind that windows with the best efficiency may cost more initially but can save you hundreds of dollars by decreasing your energy bills. Investing in certified energy-efficient windows can save Discovery Bay homeowners $579+ a year when replacing single-pane windows.

Something else that influences the total cost is the material of the frame you choose. Aluminum frames are typically the least pricey and are sturdy and relatively maintenance-free, but they provide poor insulation. On the other hand, wood frames cost the most, as they are aesthetically pleasing and provide decent insulation. Fiberglass and vinyl frames provide good insulation and cost somewhere between the other two.

What Services do Window Installers Offer?

There are generally two kinds of window installation services: full-frame and pocket installations.

Full-frame installations involve replacing the full window, including the frame, trim and sill. You most likely need a full-frame installation when you want a new style or your window has considerable deterioration. Because full-frame installations are more involved, they will increase the overall cost. Pocket installations (or retrofits) involve replacing a window within its existing frame, which makes pocket installations less labor-intensive and costly. However, if the frame has any damage or rot, you will likely need a full-frame installation instead.

If you're not sure which type of window installation service you need, your installer should be able to advise you. Generally, the decision is based on factors like the age and condition of the home, the type of building material, budget and time restrictions.

Best Availability

Renewal by Andersen

★★★★★
4.5

  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house

Best Energy-Efficient Features

Champion

★★★★★
4.5

  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty

Window Veteran

Window World

★★★★★
4.5

  • EnergyStar Partner
  • Wide variety of products and services
  • Lifetime Warranty

How We Choose the Best Window Installers in Discovery Bay

EcoWatch is different from other reviewers, as we examine these companies through a sustainability lens. We have reviewed the top window replacement companies in Discovery Bay primarily based on their energy efficient offerings, as it's the most sustainable option and the best one for homeowners. Energy-efficient windows can lower electricity bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:

Service Area

Since this is a guide for Discovery Bay, we gave more points to companies that serve the city. There are other reputable providers that didn't make the list because they wouldn't be able to serve homeowners in Discovery Bay.

Work Quality

We're willing to bet that you're looking for professionals who do a great job installing windows. We've vetted each installer included on this list to make sure its technicians are well-qualified and that the company has gotten plenty of positive customer feedback to vouch for its service.

Customer Reviews

Another self-explanatory yet super important review factor is customer feedback. If the majority of customers don't have good feedback about their service from a certain installer, it won't be featured on EcoWatch.

Cost

This one is a give-and-take: as with most services, cheap window installation companies won't always provide the most quality service. Still, we want to ensure we're highlighting companies that provide a wide range of price and financing options so they're accessible to most homeowners.

Warranty

As discussed, windows are a considerable investment, so you'll want to make sure that investment is well protected. Window installation companies that provide lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

Because of Discovery Bay's climate, homeowners need to be wary of rot, low efficiency and water damage. We factored in local experience to reflect the ability of Discovery Bay window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.

Discovery Bay, CA Window Replacement FAQs

How much does a window install cost?

The national average cost to install a window is about $600 but can range between $200 and $1,200, depending on several factors. The price is generally dependent on the size of the window, the location of your property and the type and material of the window. Also, remember that energy-efficient windows may cost more upfront but can save you a decent amount of money a year in energy bills.

Which kind of window is the best?

A window's energy efficiency is influenced by several factors, such as the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are usually the most energy-efficient and are certified by the U.S. Department of Energy.

Can I replace my own windows?

While you can install your own windows, doing so requires a lot of time and experience with home improvement projects. Hiring a professional can help ensure that the job is done properly and that you won't have to spend the time and effort to do it yourself.

Should I replace all my windows at the same time?

If your windows are more than 20 years old, you probably need to replace all of them. By that point, they are usually less efficient, draftier and/or more damaged than new windows. Doing your windows all at once will involve less paperwork and less stress.

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