Hallmark Windows and Siding’s experienced teams of replacement window installers install several brands of wood and vinyl replacement windows in Maryland, Northern Virginia, and Washington D.C. This allows us to offer customers a variety of window styles, energy-efficient glass options, and colors, with lifetime manufacturer warranties at the best price points. We have installed over 100,000 windows since 1994. We proudly feature Vytex Windows — premium vinyl replacement windows with exceptional energy efficiency and lifetime warranties.
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20% OFF Window Replacements!
Offer ends May 31, 2026
30+
Years Installing Windows
100,000+
Windows Installed Since 1994
Lifetime
Warranty on Vytex Windows
5-Star
Customer Rated
Why Choose HALLMARK WINDOW AND SIDING.
- 5 Star and A+ Consumer Ratings From Our Customers.
- Family Owned and Operated in the Metro Washington DC-Area for Over 25 Years.
- Licensed, Bonded and Insured.
- References in YOUR NEIGHBORHOOD.
- A Variety of Price Points to Fit Any Budget.
- Material, Labor and Performance Warranties on all installations.
- Excellent Manufacturer’s Warranties, Such as This Lifetime Warranty from Vytex Windows.
- We Also Install James Hardie Siding and Vinyl Siding.
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Types of Replacement Windows We Install
Double Hung
Our more popular replacement window option, double hung windows are engineered using state-of-the-art multi-million dollar robotic equipment. We offer several brands including Vytex Fortis vinyl windows.
Venting
Easy to clean and maintain, Vytex vinyl replacement windows are built so durably, you can expect decades of consistent, reliable operation.
Sliders
You can enjoy all the same benefits of other vertical opening windows with these Vytex vinyl replacement windows that slide horizontally.
Bays
Strong, durable Vytex vinyl bay windows customized specifically for your home. Save on energy bills while making a statement.
Bows
Similar to bays, Vytex bow windows have gradual curves not sharper angles, adding elegance and beauty to your home.
Garden
A replacement window option that provides the perfect place to showcase plants, grow herbs or simply add sunlight.
Specialty Shapes
Picture windows designed to fit unique openings. Selection includes half-circle, hexagon and triangle shapes.
Also Installed By Hallmark
Sliding Glass Patio Doors
Hallmark installs premium Vytex sliding glass patio doors — available in the Signature Series and 7000 Series. Engineered for smooth, effortless operation, superior energy efficiency, and backed by a lifetime manufacturer warranty. The perfect complement to your window replacement project.
View Sliding Patio Doors →Available Series
Vytex Signature Series
Premium performance & elegance
Vytex 7000 Series
Superior energy efficiency
Why New Windows Are One of the Best Home Investments
Modern replacement windows deliver comfort, savings, and curb appeal that homeowners feel every day.
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Lower Energy Bills
ENERGY STAR certified windows can reduce heating and cooling costs by up to 25% compared to single-pane windows — savings that add up year after year.
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Noise Reduction
Double and triple-pane glass with argon gas fills significantly reduce outside noise — traffic, neighbors, and lawn equipment stay where they belong: outside.
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Increased Home Value
Replacement windows consistently rank among the highest-ROI home improvement projects — recouping a strong portion of their cost and making your home more attractive to buyers.
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UV Protection
Low-E glass coatings block up to 70% of harmful UV rays — keeping your hardwood floors, furniture, and artwork from fading without darkening your rooms.
Window Replacement Service Areas
Hallmark installs replacement windows throughout the greater Washington DC metro area, including Maryland, Northern Virginia, and DC. Our crews can typically schedule your installation within a week or two of your free estimate.
Montgomery County, MD
Bethesda • Silver Spring • Rockville • Chevy Chase • Potomac • Gaithersburg • Germantown • Kensington • Takoma Park • Olney • Burtonsville • Damascus
Prince George’s County & DC
College Park • Bowie • Greenbelt • Hyattsville • Laurel • Lanham • Clinton • Upper Marlboro • Washington DC • Capitol Hill • Georgetown • Chevy Chase DC
Northern Virginia
Arlington • Alexandria • Fairfax • Falls Church • McLean • Vienna • Reston • Herndon • Tysons Corner • Annandale • Burke • Springfield • Woodbridge
Frederick County, MD
Frederick • Brunswick • Thurmont • Middletown • Mount Airy • Walkersville • New Market • Myersville
Howard County, MD
Columbia • Ellicott City • Elkridge • Savage • Jessup • Clarksville • Fulton • Cooksville • West Friendship
Baltimore County, MD
Towson • Catonsville • Pikesville • Owings Mills • Timonium • Lutherville • Cockeysville • Hunt Valley • Dundalk • Essex
Anne Arundel County, MD
Annapolis • Glen Burnie • Severna Park • Pasadena • Odenton • Crofton • Severn • Millersville • Linthicum • Hanover
Not sure if we serve your area? Call us at 301-652-4500 or request a free quote online and we will let you know.
What Other Are Saying
Replacement Windows FAQs
Have questions about replacement windows in Maryland, DC, or Northern Virginia? Here are answers to the questions we hear most from homeowners.
How long does window replacement take?
Most window replacement projects in Maryland, DC, and Virginia are completed in a single day. A typical home with 10–15 windows usually takes 6–8 hours. Hallmark’s crews are experienced and efficient, and we clean up completely before leaving.
How much do replacement windows cost?
Replacement window costs vary based on window size, style, quantity, and glass package selected. Vytex vinyl windows offer excellent quality at competitive prices across our full range of styles. Hallmark provides free, no-obligation estimates — you’ll know exactly what to expect before committing to anything.
What is the difference between vinyl and wood replacement windows?
Vinyl windows require virtually no maintenance, do not rot, warp, or need painting, and provide excellent energy efficiency. Wood windows offer a traditional aesthetic but require regular painting or staining and are more susceptible to moisture damage. Most homeowners in Maryland, DC, and Virginia choose vinyl for its durability, energy performance, and low lifetime cost. Learn more about our Vytex vinyl windows.
How do I know when it’s time to replace my windows?
Common signs include drafts or cold spots near windows in winter, condensation or fogging between the panes (a failed seal), difficulty opening or closing, visible rot or warping on the frame, rising heating and cooling bills, or windows that are 20 or more years old. If you notice any of these, a free estimate from Hallmark will tell you exactly where you stand.
Will new windows lower my energy bills?
Yes. Modern vinyl replacement windows with double-pane insulated glass significantly reduce heat transfer compared to older single-pane or degraded windows. Vytex windows use advanced glass packages that can reduce energy loss through windows by up to 50%, resulting in noticeable savings on heating and cooling costs year-round.
What is the difference between double-pane and triple-pane windows?
Double-pane windows have two panes of glass with an insulating gas-filled space between them — the standard for modern replacement windows and ideal for most Mid-Atlantic homes. Triple-pane windows add a third pane for even greater insulation, making them ideal for north-facing rooms or particularly cold areas. Hallmark will help you choose the right glass package for your home and budget.
Do replacement windows come with a warranty?
Vytex replacement windows include an industry-leading lifetime limited warranty covering the frame, glass seal, and hardware — see our Vytex Lifetime Warranty for full details. Hallmark also provides its own labor and performance warranty on every installation. Together, these warranties ensure your investment is fully protected for as long as you own your home.
What window styles does Hallmark install?
Hallmark installs double hung, single hung, casement, sliding, awning, bay, bow, garden, and specialty shape windows. We work with you to select the right style for each opening — balancing aesthetics, ventilation needs, ease of cleaning, and budget. All styles are available in Vytex vinyl with a wide range of color and glass options.
Do I need to be home during window installation?
Yes, someone should be home during the installation so our crew can access the interior of each window opening. Most installations are completed in a single day, and our team works room by room to minimize disruption. We will walk you through the completed work and make sure everything operates correctly before we leave.
Are Vytex Windows a quality brand?
Vytex is a premium American-made vinyl window manufacturer that uses state-of-the-art robotic manufacturing equipment to produce consistently high-quality windows. Their multi-chamber frame construction delivers excellent strength and insulation, and their lifetime warranty is among the best in the industry. Hallmark has installed Vytex windows on thousands of homes across Maryland, DC, and Northern Virginia with outstanding results.
