20 Best Window Companies in Guilford, PA (2025 Reviews)

Are you thinking about upgrading your windows? Our guide to the best window installation companies can help you choose the right one for you.

We analyzed all the top-rated window companies in Guilford 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 January 24, 2025

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.

Whether you're doing home renovations or have old windows, windows play an important role in conserving energy in your home. Traditional, outdated windows can cost you in electric bills. In fact, the Department of Energy estimates that about 30% of your home’s heat or cool air could be lost through your windows.

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

So if you’re building a new home, renovating or updating your windows in Guilford, this guide is the best place to get started.

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Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great Industry Reputation
  • Award-winning Company
  • Member of US Green Building Council
  • Manufactures products in-house
Save $375 Off Each Window
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best for Residential Windows

Window Nation

★★★★★
4.0
  • Custom Designs
  • Wide variety of products and services
  • Manufactures products in-house

Best Window Installation & Replacement Companies in Guilford

The EcoWatch Reviews team researched several window installation companies in Guilford to find the best ones for our readers. We assessed the companies based on their energy-efficient offerings, coverage area, local experience, customer service, price and more.

Window World logo
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 offers windows expertise in Guilford. This company has 27 years of experience in the window installation industry, and it has established itself as one of the most reputable companies in the business. Its reputation is backed by several positive reviews on customer review websites.

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, this may be the company for you.

Energy Efficiency of Window World Windows

There are a wide variety of window types available from Window World, some of which are Energy Star products. 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 Guilford?

Prices aren’t mentioned on Window World’s website, but it's known for offering some of the most affordable window installations around. You can ask for a free quote on its website for more information about the cost.

Renewal by Andersen logo
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 offers the best availability in Guilford. This company has 27 years of experience in the window installation industry, and it has established itself as one of the most reputable companies in the business. Its reputation is backed by several positive reviews on customer review websites.

If you’re looking for a company that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started, this may be the company for you.

Energy Efficiency of Renewal by Andersen Windows

There are a wide variety of window types available from Renewal by Andersen, some of which are Energy Star products. 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 Guilford?

Prices aren’t mentioned 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. You can ask for a free quote on its website for more information about the cost.

Aeroseal Windows logo
Best for Businesses

Aeroseal Windows

★★★★★
BBB Rating: A+
Locations: Regional
Founded: 1999
Pros:
  • Pros icon Many years of experience
  • Pros icon Great industry reputation
  • Pros icon Low number of customer complaints
  • Pros icon Manufactures products in-house
  • Pros icon Custom Designs
Cons:
  • Pros icon No lifetime warranty
  • Pros icon Not ideal for residential installations

Aeroseal Windows offers the best window installation for businesses in Guilford. This company has 23 years of experience in the window installation industry, and it has established itself as one of the most reputable companies in the business. Its reputation is backed by several positive reviews on customer review websites.

If you’re looking for a company that installs windows and doors at businesses across the Eastern U.S, this may be the company for you.

Energy Efficiency of Aeroseal Windows Windows

There are a wide variety of window types available from Aeroseal Windows, some of which are Energy Star products. The company claims it helps businesses save on energy expenses and reduce their carbon footprints with energy-efficient windows, as well as practices like Low-E glass coating, weatherstripping and more.

How much does Aeroseal Windows cost in Guilford?

Prices aren’t mentioned on Aeroseal’s website, but it provides high-quality windows at a competitive price point. You can ask for a free quote on its website for more information about the cost.

Window Nation logo
Best for Residential Windows

Window Nation

★★★★★
BBB Rating: A
Locations: Regional
Founded: 2006
Pros:
  • Pros icon Award-winning company
  • Pros icon Manufactures products in-house
  • Pros icon Custom designs
  • Pros icon Wide variety of products and services
Cons:
  • Pros icon Installation not covered by warranty
  • Pros icon Limited service area

Window Nation offers the best residential windows in Guilford. This company has 16 years of experience in the window installation industry, and it has established itself as one of the most reputable companies in the business. Its reputation is backed by several positive reviews on customer review websites.

If you’re looking for a company that gives customers the opportunity to view products and to speak to a representative in person in its showrooms, this may be the company for you.

Energy Efficiency of Window Nation Windows

There are a wide variety of window types available from Window Nation, some of which are Energy Star products. Each product has windowpanes coated with a Low-E (low emissivity) glaze that prevents damaging UV rays from heating your home. Plus, the spaces between double- and triple-pane windows are filled with argon gas that’s been proven to improve home insulation.

How much does Window Nation cost in Guilford?

Prices aren’t mentioned on Window Nation’s website, but based on customer feedback, you can expect to pay between $300 and $525 per window installed, making it a more affordable option compared to competitors. You can ask for a free quote on its website for more information about the cost.

We strive to be unbiased and transparent by including pros and cons for every provider. Additionally, any partnerships do not influence our reviews.

More Window Companies in Guilford

Renewal by Andersen of West Central PA

Duncansville, PA
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Skylights
  • Service icon Bay Windows
  • Service icon Glass Doors
  • Service icon Window Replacement/Installation
  • Service icon Double-Hung

Website: https://www.renewalbyandersen.com/window-company/735-central-pennsylvania/retailer
Address: 487 Municipal Dr, Duncansville, PA 16635
Phone: (717) 591-4900

Window Nation

Mechanicsburg, PA
4.6
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Bay Windows
  • Service icon Energy-Efficient Options
  • Service icon Glass Doors
  • Service icon Window Replacement/Installation
  • Service icon Custom Window Designs
  • Service icon Double-Hung

Website: https://www.windownation.com/harrisburg-showroom/
Address: 381 Independence Ave Suite 104, Mechanicsburg, PA 17055
Phone: (717) 230-1080

American Awnings and Replacement Windows

Chambersburg, PA
5.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation

Website: https://www.american-awnings.com/
Address: 791 Fern Ln, Chambersburg, PA 17202
Phone: (717) 532-9098

Replacement Windows and Doors-Homerite Waynesboro

Waynesboro, PA
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Doors
  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options
  • Service icon Glass Repair

Website: http://www.homeritewaynesboro.com/
Address: 700 S. Potomac St *SHOWROOM 12-4. CALL ANYTIME*, Waynesboro, PA 17268
Phone: (717) 749-4874

HomeRite

Mechanicsburg, PA
5.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Double-Hung
  • Service icon Energy-Efficient Options
  • Service icon Tempered Glass
  • Service icon Window Replacement/Installation

Website: https://www.homeriteharrisburg.com/
Address: 5270 E Trindle Rd, Mechanicsburg, PA 17050
Phone: (717) 987-6591

Susquehanna Valley Door and Window

York, PA
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Glass Doors
  • Service icon Energy-Efficient Options
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Bay Windows

Website: https://svdoorandwindow.com/
Address: 701 N George St, York, PA 17404
Phone: (717) 781-8087

Milcon Design & Build

Waterford, VA
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Glass Doors
  • Service icon Window Replacement/Installation

Website: http://milcondesignandbuild.com/
Address: 40413 Stonebrook Hamlet Pl, Waterford, VA 20197
Phone: (703) 581-2761

C2 Operations

Leesburg, VA
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Doors
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation

Website: https://c2operations.com/
Address: 18 Sycolin Rd SE, Leesburg, VA 20175
Phone: (703) 651-6677

Garrety Glass - Betterliving Sunrooms

Cockeysville, MD
5.0
★★★★★
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Repair
  • Service icon Bay Windows
  • Service icon Glass Doors
  • Service icon Glass Showers
  • Service icon Mirrors
  • Service icon Window Replacement/Installation
  • Service icon Custom Glass

Website: https://garretyglass.com/
Address: 11309 York Rd, Cockeysville, MD 21030
Phone: (443) 873-0700

Glass & Mirror Services, Inc.

Frederick, MD
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Showers
  • Service icon Metal Frames
  • Service icon Custom Glass
  • Service icon Glass Repair
  • Service icon Energy-Efficient Options
  • Service icon Mirrors
  • Service icon Window Replacement/Installation

Website: http://www.glassandmirrorservices.com/
Address: 5740 Industry Ln, Frederick, MD 21704
Phone: (301) 662-0026

Grand Opening Windows & Doors

New Kingstown, PA
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Bay Windows
  • Service icon Glass Doors
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Custom Window Designs

Website: https://www.grandopeningwindows.com/
Address: 31 E Main St, New Kingstown, PA 17072
Phone: (717) 691-5670

Glass Doctor of Mechanicsburg, PA

Mechanicsburg, PA
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Glass Showers
  • Service icon Custom Glass
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors
  • Service icon Energy-Efficient Options
  • Service icon Glass Repair
  • Service icon Window Repair
  • Service icon Mirrors

Website: https://glassdoctor.com/mechanicsburg-pa
Address: 5270 E Trindle Rd, Mechanicsburg, PA 17050
Phone: (717) 766-6262

B T Window & Doors LLC

Sykesville, MD
4.9
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Custom Window Designs
  • Service icon Glass Doors
  • Service icon Energy-Efficient Options
  • Service icon Bay Windows

Website: https://www.btwindowanddoors.com/
Address: 4310 Jefferson Ave, Sykesville, MD 21784
Phone: (410) 336-1945

MDVA Windows

Clarksburg, MD
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Doors
  • Service icon Window Replacement/Installation
  • Service icon Window Repair

Website: http://www.mdvawindows.com/
Address: 12828 Clarksburg Square Rd UNIT 304, Clarksburg, MD 20871
Phone: (240) 887-2908

Pella Windows & Doors of Harrisburg

Harrisburg, PA
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Bay Windows
  • Service icon Window Replacement/Installation
  • Service icon Double-Hung
  • Service icon Glass Doors

Website: https://www.pellabranch.com/harrisburg/showrooms/harrisburg-pa/
Address: 3950 Tecport Dr, Harrisburg, PA 17111
Phone: (717) 545-0855

York Window Man

York, PA
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Doors

Website: http://www.yorkwindowman.com/
Address: 1941 Debbie Dr, York, PA 17403
Phone: (717) 578-9683

Potomac View Energy

Sykesville, MD
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Educational Website

Services Offered

  • Service icon Wood Frames
  • Service icon Glass Doors
  • Service icon Bay Windows
  • Service icon Double-Hung
  • Service icon Energy-Efficient Options
  • Service icon Custom Window Designs
  • Service icon Vinyl Frames
  • Service icon Window Replacement/Installation

Website: https://potomacviewenergy.com/
Address: 7520 Main St #201, Sykesville, MD 21784
Phone: (443) 881-8538

Tri-State Screens

Purcellville, VA
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Doors

Website: http://www.tristatescreens.com/
Address: 104 N Bailey Ln, Purcellville, VA 20132
Phone: (540) 751-1269

Pella Windows & Doors of Gaithersburg

Gaithersburg, MD
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Glass Doors
  • Service icon Wood Frames
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation

Website: http://www.pellabranch.com/washington-dc/showrooms/gaithersburg
Address: 202 Perry Pkwy Suite 6, Gaithersburg, MD 20877
Phone: (202) 810-6722

C3 American Exteriors

Hunt Valley, MD
4.9
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Fiberglass Frames
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation

Website: https://www.c3america.com/
Address: 201 International Cir STE 230, Hunt Valley, MD 21030
Phone: (410) 401-9797
Guilford Window Cost Calculator

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

There are quite a few perks of upgrading to energy-efficient windows. A few reasons you may want to consider making the switch are the following:

  • Protect your investment: When you have an older home, your windows could also be outdated or damaged. Upgrading your windows is an important part of maintaining your property and its value.
  • Decrease your carbon footprint: Decreasing how much energy you use also lowers your carbon emissions. You could reduce it by about 286 pounds.
  • Protect your valuables: The low-emissivity coatings on many energy-efficient windows help prevent your floors, carpets and furniture from fading by filtering out UV rays.
  • Save money on power bills: The Department of Energy estimates that heat gained or lost through windows makes up around 25-30% of energy use in your home. Switching to energy-efficient windows can help lower that number, which helps you save some money on your bills.

Estimated Cost of Window Replacement in Guilford

Each window replacement company provides various services and has different prices depending on several factors.

How Much Do New Windows Cost?

Though the national average cost of installing a single window is around $600, it can range anywhere from $200 to $1,200. But prices differ remarkably depending on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window companies also provide door installations and replacements, which will make your project cost more.

Keep in mind that energy-efficient windows may cost more, but Energy Star predicts the upgrade will save you between $101 and $583 per year when replacing single-pane windows and between $27 and $197 per year when you install double-pane, clear glass windows. Your exact savings will vary depending on your local climate, energy rates and individual home characteristics.

The cost of your window installation will also vary based on the type of material you choose for the frames. Wood windows are usually the most expensive, although it depends on whether they are 100% wood or clad with aluminum or vinyl. Fiberglass windows also tend to be a bit more expensive than vinyl, but they are more efficient.

What Services do Window Installers Offer?

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

A full-frame installation replaces the full window, including the windowsill, frame, trim and the window panes. As this kind of installation requires more time and labor, it will cost more than a pocket installation. Pocket installations (or retrofits) entail replacing a window within the existing frame, which makes pocket installations less labor-intensive and costly. However, if the frame has any rot or deterioration, you should opt for a full-frame installation instead.

If you’re not sure which kind 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.

Advertisement

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great Industry Reputation
  • Award-winning Company
  • Member of US Green Building Council
  • Manufactures products in-house
Save $375 Off Each Window
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best for Residential Windows

Window Nation

★★★★★
4.0
  • Custom Designs
  • Wide variety of products and services
  • Manufactures products in-house

How We Choose the Best Window Installers in Guilford

EcoWatch reviews differ from other reviews because we evaluate these companies through a sustainability lens. Along with energy efficiency, we assessed several window installers in Guilford and assigned rankings based on the following methodology:

Service Area

Since this is a guide for Guilford, we gave more points to companies that serve the city. There are certainly other reputable providers that didn’t make the cut because of the low odds that they would serve the average homeowner in Guilford.

Work Quality

When picking new windows, the quality and range of services can often play just as important of a role in overall efficiency and performance as the type of window you choose. We do give window installers higher marks if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.

Customer Reviews

Another self-explanatory yet very important review factor is customer feedback. If most customers don’t have positive feedback about their service from a certain window installation company, you won’t see it featured on EcoWatch.

Cost

This one is a give-and-take: similar to most services, cheap window installers won’t always provide the most quality service. On the other hand, we want to ensure we’re highlighting companies that provide a variety of price and financing options so they’re accessible to most homeowners.

Warranty

As discussed, windows are a significant investment, so you’ll want to make sure that investment is protected. Window installation companies that give you lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

Last but not least, we like to see companies that have a proven track record in the industry. Window installers that have more years of experience earn higher rankings by our standards. We like to see at least ten years of experience.

Guilford, PA Window Replacement FAQs

How much does a window install cost?

The national average cost to replace a window is around $600 but can range from $200 to $1,200, depending on a variety of factors. The price is typically influenced by the type and material of the window, the size of the window and the location of your property. Also, keep in mind that energy-efficient windows may cost more initially but can save you a decent amount of money a year in energy bills.

Which kind of window should I get?

Generally, double-pane windows will be more efficient than single-pane windows and windows that do not open will be more efficient than windows that do. To be sure you’re getting the most energy-efficient windows, look for models with the blue Energy Star certification — they’re certified energy-efficient by the U.S. Department of Energy.

Do I really have to use a window installation company?

You should use a window installation company whenever you need to upgrade your windows. Installing windows is a complex process that can take a lot of time, so it’s best left to the professionals.

Should I replace all my windows at once?

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