20 Best Window Companies in Mill Valley, CA (2023 Reviews)

When the time comes to replace your windows, our list of the best window installation companies can help you find the right provider for you.

We analyzed all the top-rated window companies in Mill Valley 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.

A guide on the top window installation companies in Mill Valley may not seem like the most compelling article on EcoWatch, but trust us, windows impact your life more than you might realize. If your house has old or damaged windows, your HVAC system could be working overtime to heat or cool your home. This means higher electricity bills.

Installing new, efficient windows on your house can help you save money each month on your power bills — and you can help the environment as well.

We've put together this guide on the top installation companies to help you in your research, so you can not only benefit from brand new windows, but also save money on your electric 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 Mill Valley

The EcoWatch Reviews team assessed dozens of window providers across Mill Valley to narrow our list down to the top ones. The companies in this article passed our review standards for energy-efficient offerings as well as price, local expertise, 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 provides windows expertise in Mill Valley. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has about 27 years of experience in the window replacement sector.

If you’re looking for a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital, Window World may be the company for you.

Energy Efficiency of Window World Windows

Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home. Not all of Window World’s windows are Energy Star certified, so make sure you mention that you want Energy Star windows when inquiring.

How much does Window World cost in Mill Valley?

Window World does not display prices on its website, but it's known for offering some of the most affordable window installations around. If you’d like more accurate information, you can inquire about 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 been in the window installation business for about 60 years. Its reputation is backed by a considerable amount of positive reviews on customer review websites.

Milgard may be the company for you if you want 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

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. Not all of Milgard’s offerings are Energy Star certified, so be sure to mention that you’re interested in Energy Star windows when inquiring.

How much does Milgard Windows & Doors cost in Mill Valley?

Prices aren’t available on Milgard’s website, but it offers different kinds of windows at varying price points. Getting a free quote on its website is the best way to know for sure.

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 is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has been in the window installation business for about 27 years. Its reputation is backed by a considerable amount of positive reviews on customer review websites.

Andersen may be the company for you if you want 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

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. Not all of Andersen’s offerings are Energy Star certified, so be sure to mention that you’re interested in Energy Star windows when inquiring.

How much does Renewal by Andersen cost in Mill Valley?

Prices aren’t available on Andersen’s website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. Getting a free quote on its website is the best way to know for sure.

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 offers the best warranty in Mill Valley. It's 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 windows industry, and it has proved to be one of the most respected companies in Mill Valley. The company has many positive reviews from customers on online review websites.

It has established itself as a company that has an industry-leading warranty covering products, parts and workmanship for life.

Energy Efficiency of Universal Windows Direct Windows

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. Not all of Universal’s offerings are Energy Star certified, so be sure to mention that you’re interested in Energy Star windows when inquiring.

How much does Universal Windows Direct cost in Mill Valley?

Pricing information is not available on Universal’s website since the cost of window installment differs based on how many and what type(s) of windows you need. However, 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. The best way to know for sure is to request a free quote from the company.

We've recommended providers with good reputations, but keep in mind these are national companies, so your service may depend on your local crew. We have tried to remain unbiased and transparent by mentioning pros and cons for every company we reviewed.

More Window Companies in Mill Valley

Renewal by Andersen of San Francisco

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

Services Offered

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

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

Window Factory

Greenbrae, CA
4.3
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Bay Windows
  • Service icon Aluminum Window Frames
  • Service icon Window Replacement
  • Service icon Fast Delivery

Website: http://www.bayareawindowfactory.com/
Address: 2100 Redwood Hwy, Greenbrae, CA 94904
Phone: (415) 924-3300

Charles Window & Door Company

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

Services Offered

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

Website: https://www.charleswindows.com/
Address: 1505 Francisco Blvd E, San Rafael, CA 94901
Phone: (415) 233-6932

Ace Glass Company

San Francisco, CA
4.2
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: http://sfaceglass.com/
Address: 381 11th St, San Francisco, CA 94103
Phone: (415) 395-0806

Home Services at The Home Depot

San Rafael, CA
3.5
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.homedepot.com/l/San-Rafael/CA/San-Rafael/94901/657/services
Address: 111 Shoreline Pkwy, San Rafael, CA 94901
Phone: (415) 323-5640

Window Replacement Center

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

Services Offered

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

Website: https://www.windowreplacementcontractor.com/
Address: 2500 38th Ave, San Francisco, CA 94116
Phone: (415) 926-2427

Pella Windows & Doors of Northern California

San Francisco, CA
4.1
★★★★★
  • 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 Sliding Glass
  • Service icon Residential Windows
  • Service icon Window Replacement
  • Service icon Bay Windows
  • Service icon Double-Hung

Website: https://www.pellabranch.com/northern-california/showrooms/san-francisco/
Address: 850 S Van Ness Ave Suite 13, San Francisco, CA 94110
Phone: (628) 400-5980

A-Taylor Made Window

Richmond, CA
4.1
★★★★★
  • 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 Custom Window Designs
  • Service icon Residential Windows
  • Service icon Bay Windows
  • Service icon Window Replacement
  • Service icon Commercial Windows

Website: https://www.ataylormadewindow.com/
Address: 5327 Jacuzzi St #5E, Richmond, CA 94804
Phone: (510) 559-5530

Raven Restoration

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

Services Offered

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

Website: http://ravenrestorationsf.com/
Address: 989 Peralta Ave, San Francisco, CA 94110
Phone: (415) 271-2195

J & D Glass & Sash Inc

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

Services Offered

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

Website: http://www.j-dglass.com/
Address: 1454-B Fourth St, Berkeley, CA 94710
Phone: (510) 843-9391

Novato Glass Inc

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

Services Offered

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

Website: http://novatoglassinc.com/
Address: 1020 Reichert Ave, Novato, CA 94945
Phone: (415) 897-5117

OCEAN SASH AND DOOR INC.

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

Services Offered

  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Aluminum Window Frames
  • Service icon Window Replacement
  • Service icon Residential Windows

Website: http://www.oceansashanddoor.com/
Address: 2730 Oakdale Ave, San Francisco, CA 94124
Phone: (415) 863-1256

Rhino Siding & Window Replacement

San Francisco, CA
4.1
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

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

Website: http://www.rhinosidingwindows.com/
Address: 100 Girard St, San Francisco, CA 94134
Phone: (415) 985-1961

Wilson Construction

El Sobrante, CA
4.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Price Transparency

Services Offered

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

Website: https://website-5295393420038640049163-generalcontractor.business.site/
Address: 6013 Monte Verde Rd, El Sobrante, CA 94803
Phone: (510) 682-7674

The Window Specialists, Inc.

Oakland, CA
3.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Commercial Windows
  • Service icon Bay Windows
  • Service icon Residential Windows
  • Service icon Window Replacement
  • Service icon Energy-Efficient Options
  • Service icon Fast Delivery
  • Service icon Custom Window Designs

Website: http://www.windowspecialist.com/
Address: 3250 Hollis St, Oakland, CA 94608
Phone: (510) 923-1000

Vinyl Casement Windows

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

Services Offered

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

Website: https://bestexteriors.com/siding/
Address: 1999 Harrison St, Oakland, CA 94612
Phone: (650) 524-5090

Best Exteriors

Oakland, CA
3.9
★★★★★
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

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

Website: https://bestexteriors.com/
Address: 1999 Harrison St #10219, Oakland, CA 94612
Phone: (877) 792-6065

Sunlight Window and Door Systems, Inc.

Oakland, CA
4.1
★★★★★
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement
  • Service icon Residential Windows
  • Service icon Aluminum Window Frames
  • Service icon Commercial Windows
  • Service icon Custom Window Designs
  • Service icon Fast Delivery
  • Service icon Energy-Efficient Options
  • Service icon Glass Showers

Website: https://sunlightwds.business.site/
Address: 4705 Coliseum Wy, Oakland, CA 94601
Phone: (510) 866-2668

Dial Glass and Window

Pacifica, CA
3.7
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

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

Website: http://www.dialglass.net/
Address: 1704 Palmetto Ave, Pacifica, CA 94044
Phone: (650) 359-5380

Save Energy Windows and Doors

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

Services Offered

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

Website: http://www.saveenergyco.com/
Address: 315 Petaluma Blvd S, Petaluma, CA 94952
Phone: (415) 492-1814
Mill Valley Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Mill Valley, 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 Mill Valley Saves You Money

Switching to energy-efficient windows can help improve the comfort of your home and help you save on energy bills. Here's more information on how upgrading your windows could benefit you:

  • Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which not only insulate your home better, but also filter out harmful UV rays, preventing your furniture, carpet and other valuables from fading.
  • Decrease your carbon footprint: By using less energy once you switch to energy-efficient windows, you'll also be decreasing your indirect greenhouse gas emissions by about 12%, according to Energy Star.
  • Protect your investment: The older your home is, the more likely you are to benefit from switching to energy-efficient windows. 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.
  • Better temperature control in your home: When you live in a place like Mill Valley where the winters can be very cold, you often need to rely on your heater to keep your house warm. Energy-efficient windows can reduce how much heat is lost through your windows when heating your home.

Estimated Cost of Window Replacement in Mill Valley

Let's take a look at the cost of replacing your windows and the kinds of services you may need for your home.

How Much Do New Windows Cost?

Though the typical to replace a single window is around $600, it can range from $200 to $1,200. Costs will differ significantly depending on the number of windows you need, the current condition of your home, the quality of your products and your location. A lot of window companies also offer replacement door installations and other add-ons like shutters, coating, baths and more. These extra services will increase overall project costs.

It's important to remember that windows with the best efficiency may cost more initially but can save you hundreds of dollars by lowering your energy bills. Investing in Energy Star certified windows can save Mill Valley homeowners $451+ a year when replacing single-pane windows.

We recommend requesting free quotes from multiple window installers to find the one that works best for your budget.

What Services do Window Installers Offer?

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

Full-frame installations require replacing the whole window — the sill, frame, trim and all. These are typically done when you want to change the style of your window or when it has a great amount of deterioration. Full-frame installations involve more time and labor and will increase overall costs. Pocket installations are on the simpler end and won't carry as large a bill, as they entail merely replacing the window within its existing frame. But if the frame has any damage, you should opt for a full-frame installation instead.

Your window installation company can recommend the best type for your project. In Mill Valley, the decision will mostly depend on the efficiency of your home and how old your existing frames are.

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 Mill Valley

The EcoWatch Reviews team is different from other reviewers since we're examining these companies through a sustainability lens. We've assessed the top window replacement companies in Mill Valley mainly based on their energy efficient offerings, as the most sustainable option also benefits homeowners in many ways. Energy-efficient windows can lower power bills by hundreds of dollars. Along with energy efficiency, our rating methodology considers the following factors:

Service Area

This one is self-explanatory, but we've chosen to highlight window installation companies that serve the Mill Valley area so you can find a quality window installation company near you.

Work Quality

When picking new windows, the quality and breadth of services can often play just as important of a role in insulation and performance as the brand of window you choose. We do give window installers more points if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.

Customer Reviews

We analyzed trends in recent customer feedback to determine the companies with the most consistent customer satisfaction. Customer satisfaction might be the factor we place the most value on, as it reflects the quality of services across nearly every category, including cost, professionalism, quality of installation, quality of parts, warranty and more.

Cost

This one is a give-and-take: similar to most services, cheap window installers may not provide the highest 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 sizable investment, so you'll want to be certain that investment is protected. Window installation companies with lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

Lastly, we like to see companies that have a proven track record in the industry. Window installation companies that have more years of experience are going to earn higher rankings by our standards. We like to see at least ten years of experience.

Mill Valley, CA Window Replacement FAQs

How much should a window install cost?

The national average cost of replacing a window is about $600 but can range between $200 and $1,200, based on a variety of factors. The price is generally influenced by the location of your property, the type and material of the window and the size of the window. Also, bear in mind that energy-efficient windows may cost more upfront but can save you hundreds of dollars a year in energy bills.

What type of window is the most energy-efficient?

A window's energy efficiency depends on a number of 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.

Do you really need to use a window installation company?

You should hire a window installation professional whenever you want new windows. Installing windows is a complex process that can be difficult and time-consuming, so it's best left to the professionals.

What time of year is the best time to replace my windows?

Replacement windows can be installed at any time, but autumn might be the best season. Regardless of when you install them, the contractors will take steps to ensure that too much hot or cold air doesn't get into the home, so the temperature outside doesn't necessarily matter that much. What's most important is that the weather should be dry.

Should I replace all my windows at the same time?

If you're upgrading your windows to get more efficient windows, replacing all of your windows at once is the only way to gain that benefit. However, if you have only a few windows that are damaged or leaky, you can replace just those.

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