
Our team brings more than 25 years of combined industry experience, and we treat every project with the care we would give our own home. We serve Alexandria and homeowners across Northern Virginia.

From GAF-certified roofing to energy-efficient windows and doors, we install materials built to hold up through Virginia's hot summers, cold winters and everything between.

Our technicians are trained and certified, and they take care to do clean, precise work that is done right the first time, whether your home is a historic brick rowhouse or a newer build.

Every project — whether it's a single window or a full exterior renovation — is backed by Landmark's lifetime guarantee, so Alexandria homeowners can move forward with total confidence.
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Kimberly Shifflett7 days agoTrustindex verifies that the original source of the review is Google.
Very professional, would contact when need work againPosted on Google![]()
Wanda Fehrman17 days agoTrustindex verifies that the original source of the review is Google.
From begining to the end. Great reps. Great personal. Friendly and respectful of my property. Clean up inside and outside. I would highly recommend them. Great Company.Posted on Google![]()
Emmy Lieser17 days agoTrustindex verifies that the original source of the review is Google.
Excellent experience working with this company. Extremely professional and kept us informed about everything. The final result was beautiful!Posted on Google![]()
Ines Thornburg24 days agoTrustindex verifies that the original source of the review is Google.
Great experience overall with our window replacement ! Professional, efficient, and high quality. Thanks to Alex, Wilmer and the whole team!Posted on Google![]()
Hiwot Zegene71 days agoTrustindex verifies that the original source of the review is Google.
Daniel Pero is a great young man who came out to look at my old doors, which were badly in need of replacement. He explained everything thoroughly and clearly, including what I should expect throughout the process. He was also fearless about speaking with his manager and advocating for me to get a great discount. I truly appreciated his effort and willingness to help. I would highly recommend Daniel to anyone looking to replace their doors. Great job, Daniel!Posted on Google![]()
Perry Lattimore78 days agoTrustindex verifies that the original source of the review is Google.
Landmarc as whole were extremely helpful and understanding with our needs and what we were trying to accomplish. The projects were on time quality materials and installation was seamless. Highly recommend and will be my window and door contractor for future projects as they arise.Posted on Google![]()
Thomaseane Brown90 days agoTrustindex verifies that the original source of the review is Google.
The installer did awesome job very neat and professionalPosted on Google![]()
Faith Bell106 days agoTrustindex verifies that the original source of the review is Google.
The product is fabulous. The engineers are thorough. And I had a fantastic experience from estimate to install. And guess what? They came through and delivered the day before my birthday. I am overjoyed. I got a cake from Benjamin!Posted on Google![]()
Sibyl Harleston106 days agoTrustindex verifies that the original source of the review is Google.
2026: Landmark just finished installing my final 4 windows today and I couldn't be more pleased. It only took 2-3 weeks for them to be manufactured and installed - much less time than I expected. Santiago once again completed the install, and he was efficient and courteous, and left the place clean. I recommend wholeheartedly! 2024: I have my new windows today and feel like I live in a new home! I am thrilled! Robbie delivered on what was promised, and the install was a week earlier than was anticipated. The quality of the windows and service was excellent. The install by Santiago was smooth and he was polite and accommodating. I plan to do my remaining windows with them and would recommend to anyone considering an upgradePosted on Google![]()
Terry E. Brown119 days agoTrustindex verifies that the original source of the review is Google.
Great service! Arrived on time and the job was done to my satisfaction. Overall, great experience; would recommend to friends and colleagues.
Industry certifications earned by Landmark Windows & Doors






Will new windows and doors suit an older Alexandria home?
Alexandria has many older brick rowhouses, colonials and townhomes, from Old Town to Del Ray. We offer trim, grille and finish options chosen to match the look of the home.
How does Landmark handle installation on a tight street or limited parking?
We plan equipment staging and access when we schedule the job, so street width, parking and any HOA or condo loading rules are sorted out before install day.
Do I need approval to replace windows or doors on a historic home in Alexandria?
Possibly. Homes in Old and Historic Alexandria and the Parker-Gray historic district are reviewed by the City’s Board of Architectural Review, so exterior window and door changes can need approval before work starts. We explain what applies to your address and help you prepare, so you know before you order.