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Best Window Replacement Companies in Rockville, MD

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Written By Max Peterson | Last Updated: February 05, 2024

You might be installing replacement windows to enhance your home's exterior facade, lower your energy usage, or protect your home from the rain and gusty winds. Local contractors recognize that homeowners would rather not pay a high price for window replacement in Rockville. They work with cost-efficient materials that don't sacrifice durability.

Top Pick
  • Full-service installation
  • Large window selection
  • Nearly 30 years of experience
Best Financing
  • Full-service installation
  • In-house, U.S.-made products
  • More than 70 years of experience
Most Customizable
  • Full-service remodeling
  • 96% satisfaction rate
  • More than 30 years of experience

Top 10 Rockville Window Installation Companies

We recommend these local businesses for your window replacement in Rockville.

Rockville residents can trust the This Old House Reviews Team to provide relevant, up-to-date window company recommendations. To identify the best companies, we consider these five criteria:

  • Product quality
  • Professional experience and licensure
  • Services and warranties
  • Customer reviews and recommendations
  • Energy-efficiency guarantees

Champion Restoration & Construction LLC Logo

Champion Restoration & Construction

Based on 27 customer reviews.

Services Offered

Commercial Windows Window Install & Replacement Full-Service Installations Residential Windows


  • Price transparency
  • Educational website
  • Free assessment
14102 Sullyfield Cir Suite #2200, Chantilly, VA 703-718-6777 championrandc.com
Window World of Washington DC Logo

Window World of Washington DC

Based on 418 customer reviews.

Services Offered

Sliding Glass Doors Bay Windows Window Install & Replacement Double-Hung Storm Doors


  • Free assessment
  • Good customer service
  • Timely service
4116 Walney Rd Suite J, Chantilly, VA 703-378-7999 windowworlddc.com
Pella Windows & Doors of Gaithersburg Logo

Pella Windows & Doors of Gaithersburg

Based on 301 customer reviews.

Services Offered

Bay Windows Sliding Glass Doors Window Repair Pella Double-Hung Window Install & Replacement Fiberglass Frames Wood Frames Glass Doors


  • Educational website
  • Good customer service
  • Price transparency
202 Perry Pkwy Suite 6, Gaithersburg, MD 202-810-6722 pellabranch.com
R&H Glazing Inc Logo

R&H Glazing

Based on 17 customer reviews.

Services Offered

Window Repair Energy-Efficient Options Vinyl Frames Commercial Windows Fiberglass Frames Custom Window Designs Bay Windows Sliding Glass Doors Glass Doors Window Install & Replacement


  • Educational website
  • Price transparency
  • Free assessment
10129 River Rd B 204, Potomac, MD 301-804-6459 potomacwindowreplacement.com
Metropolitan Window & Glass Repair Logo

Metropolitan Window & Glass Repair

Based on 25 customer reviews.

Services Offered

Tempered Glass Mirrors Window Install & Replacement Sliding Glass Doors Glass Showers Commercial Windows Window Repair Glass Doors Glass Repair


  • Good customer service
  • Timely service
  • Price transparency
3766 Howard Ave Suit 205, Kensington, MD 301-755-8060 metropolitanwindowandglassrepair.com
Window Replacement DC - Bethesda Logo

Window Replacement DC - Bethesda

Based on 16 customer reviews.

Services Offered

Storm Windows Glass Repair Glass Showers Wood Frames Sliding Glass Doors Bay Windows Energy-Efficient Options Window Install & Replacement Commercial Windows Glass Doors Mirrors Vinyl Frames Fiberglass Frames Andersen Custom Window Designs Roof Windows Double-Hung Aluminum Frames Window Repair Skylights


  • Good customer service
  • Educational website
  • Free assessment
6391 Arlington Rd #202, Bethesda, MD 702-842-2495 window-replacement-dc.com
Window Expert Logo

Window Expert

Based on 29 customer reviews.

Services Offered

Glass Doors Fiberglass Frames Sliding Glass Doors Window Repair Commercial Windows Energy-Efficient Options Custom Window Designs Window Install & Replacement Double-Hung Bay Windows


  • Timely service
  • Good customer service
  • Educational website
19420 Ridgecrest Dr, Germantown, MD 240-774-2060 germantownwindowreplacement.com


Based on 219 customer reviews.

Services Offered

Window Install & Replacement Energy-Efficient Options


  • Good customer service
  • Price transparency
  • Educational website
10822 Childs Ct, Silver Spring, MD 410-375-8206 kelemerbrothers.com
Safety Window Glass Repair LLC Logo

Safety Window Glass Repair

Based on 95 customer reviews.

Services Offered

Glass Showers Mirrors Commercial Windows Skylights Double-Hung Window Install & Replacement Glass Doors Tempered Glass Triple Pane Glass Glass Repair Sliding Glass Doors Custom Glass Window Repair Bay Windows


  • Price transparency
  • Free assessment
  • Good customer service
7529 Spring Lake Dr Unit C1, Bethesda, MD 202-460-8860 safetywindowglassrepair.com

More Local Window Companies

GR Contractors LLC General Home Remodeling/ Construction/ Kitchens & Bathrooms Remodeling/Commercial/Washington DC.

User Reviews: 4.7/5 

1336 Missouri Ave NW #127
Washington, DC 20011

Artisan Windows

User Reviews: 4.4/5 

15416 Tierra Dr
Silver Spring, MD 20906

Capital Remodeling, Inc.

User Reviews: 4.3/5 

555 Quince Orchard Rd #210
Gaithersburg, MD 20878

Window and Door Showplace Inc

User Reviews: 4.3/5 

6832 Old Dominion Dr Suite 103
McLean, VA 22101

Metropolitan Glass Services

User Reviews: 4.6/5 

5142 MacArthur Blvd NW
Washington, DC 20016

Window Replacement DC - Tysons

User Reviews: 4.7/5 

7901 Jones Branch Dr #619
Tysons, VA 22102

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

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Facts about Rockville
Annual Energy Efficient Windows Savings: $294
Average Max Temp: 63°F
Average Min Temp: 46°F
Average Daily Sunlight: 54%
Average Annual Snowfall: 21.4"
Average Monthly Precipitation: 3.58"

Expert Tips By

This Old House empowers homeowners with the knowledge and tools they need to tackle various projects and navigate the complexities of homeownership.

How To Choose a Window Company in Rockville

Reliability is essential when it comes to choosing a window company. However, your chosen company should also align with your needs and understand your vision. Think about the following factors during your company search:

Window Cost by Type

Replacing your windows is a substantial expense, so balancing cost with long life is important. Although premium windows may be more expensive to buy, they often yield better long-term value due to their extended lifespan. The final cost of your window replacement will rely on the particular materials, styles, and sizes you need. Single-hung windows often cost less due to their straightforward style and simple mechanisms, while a custom-cut arch window in a master suite will cost more. If you're undecided, a window provider can help you figure out which options are best for your home.

To help you form a rough estimate, this table shows the typical cost of the most common residential window types.

Window Types Average Cost
Arched $232-$1427
Awning $336-$937
Bay $775-$5751
Custom $345-$958
Casement $268-$1555
Double-hung $125-$809
Egress $230-$574
Glass Block $46-$581
Picture $201-$1491
Single-hung $91-$1533
Skylight $115-$1384
Sliding $264-$1342
Storm $54-$379
Transom $281-$587

Window Material Cost

Window prices also vary based on material. Each option gives you different benefits depending on your climate and energy efficiency needs. Fiberglass and vinyl are readily-available materials, so they tend to cost less. Likewise, aluminum and composites look sleek and stay strong against the elements, so they tend to cost more.

Window Types Average Cost
Aluminum $54-$1533
Composite $553-$1244
Fiberglass $91-$775
Vinyl $186-$1725
Wood $276-$1555

Other Window Replacement Costs

Your total cost for new windows will also include applicable warranty fees, permit application fees, and labor. Make sure to discuss each of these elements with a sales representative before committing to a window company.

Experience and Training

Choose a company that focuses on window repair and installation, and look for this information on its website:

  • How long it's been serving the Rockville area
  • Photo galleries of projects its crews completed
  • Privately-issued accreditations attesting to its workmanship
The more experience a company has, the better its service and workmanship.

Licensing and Credentials

Window specialists and subcontractors in Maryland must carry a license from the state's Home Improvement Commission. Each applicant for a license must pass a test on business and trade practices, submit business filings, verify insurance information, and prove good financial standing.

Types of Windows Offered

The style of window you prefer should influence your company choice. Not every contractor will necessarily be familiar with the window styles you want. A company website will reveal more about the styles of windows it specializes in, such as:

  • Awning
  • Bay
  • Bow
  • Casement
  • Crank-out
  • Custom
  • Double- or single-hung
  • Egress
  • Garden
  • Jalousie
  • Picture
  • Sliding
  • Skylight
  • Specialty
  • Storm
  • Transom
  • Vent
Also, check the style of window framing materials a company works with. Each material has distinct price points, life spans, and energy performance capabilities. Common materials include vinyl, wood, fiberglass, composite and aluminum.

Customer Feedback

Reading other customers' stories is a surefire way to screen different window companies. Read customer reviews on sites such as Yelp, Google, and Trustpilot. You can also view customer reviews and company ratings on the Better Business Bureau (BBB) website. Speak with people you know who have used a company you're interested in, and ask a representative for a copy of its reference list.

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Frequently Asked Questions About Window Replacement in Rockville

How much energy and money will I save by upgrading my windows?

Rockville homeowners could potentially save $290 annually by switching to efficient windows. They'll also decrease their property's carbon dioxide emissions by 230 pounds per year.

According to the national Department of Energy, up to a third of a house's HVAC usage is to compensate for the heat or cold entering through windows. Energy-efficient windows help keep heat out in the summertime and retain heat in the wintertime, both protecting your comfort and saving you money.

Does window replacement involve pulling permits?

The answer to this question will depend on your local building codes and regulations. Some municipalities require permits for window replacement projects, especially those involving structural changes or alterations to the window openings. We recommend checking with your local building department or contact a professional before undertaking any window replacement work.

Do window companies have guarantees or warranties for their work?

Window companies often give assurances for the work they do. Each typically covers defects with materials and workmanship for a specified period of time. It's essential to confirm the conditions of the warranty with a window company before hiring it.

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

More Window Resources

National Windows Company Ranking Methodology


Energy Star