Replacement windows and door installation done right.

LOwest prices MAXimum quality

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    Locally owned & operated for 10+ years

    Lomax Office

    Get the service you deserve

    At Lomax Window & Door Co, we understand that your home is not just a physical space, but a place where you create memories and build a life.

    That's why we are dedicated to providing the best service possible, going above and beyond to ensure that your home is not only visually appealing but also safe, secure and energy-efficient.

    Our team of experts will work closely with you, taking the time to understand your specific needs and preferences, to find the perfect windows and doors that fit your style and budget. And because customer satisfaction is our ultimate goal, we won't rest until you are completely satisfied with the end result.

    Trust us to provide you with exceptional service and give your home the upgrade it deserves.

    Backed by


    All of our window replacement and door installation services are backed by a comprehensive warranty for your peace of mind.



    All of our door installation and window replacement services come with a satisfaction guarantee. If you're not happy, neither are we.



    Our team of expert installers will ensure a professional, efficient and precise service. Your peace of mind is our priority.



    No haggling, no pushy salespeople, we're completely transparent so you can budget accordingly without any hidden costs.


    Trustworthy replacement windows in Fort Collins

    When it comes to replacement windows in Fort Collins, Lomax Window & Door Co is the premier choice. Our team of experienced professionals are dedicated to providing top-quality window replacements and installations for your home. We offer a wide range of options to fit your needs and budget, and are committed to ensuring customer satisfaction.

    Replacement windows not only enhance the appearance of your home, but they also improve energy efficiency and increase natural light. Our team has a wide range of window styles to choose from, including double-hung, sliding, and more. Whether you're looking to upgrade the look of your home or improve its performance, we have the expertise and skills to get the job done.

    Trust Lomax Window & Door Co for all your replacement window needs in Fort Collins.

    Quality door installation in Fort Collins

    When it comes to door installation services in Fort Collins, trust Lomax Window & Door Co. Our experienced team of professionals will provide you with the highest quality installation and customer service experience. We offer a variety of door options to suit any need, from single doors to sliding glass doors - and we'll work closely with you to find the perfect fit for your home's style.

    With our commitment to customer satisfaction and quality craftsmanship, there's no better choice when it comes to door installation services in Fort Collins. Contact us today and let us help you with your door installation needs. We'll work with you every step of the way to ensure you are completely satisfied with the end result.

    For all your door installation needs in Fort Collins, rely on the experts at Lomax Window & Door Co.


    Recent reviews

    Our recent reviews for window replacement and door installation services have been overwhelmingly positive, with customers praising our team for their professionalism, attention to detail, and excellent customer service. Rest assured that you'll be in good hands!

    Find more on Google, Yelp, and Facebook

    Dawn G.

    "Everyone I spoke with was helpful and professional. Everything went smoothly and the prices were reasonable."

    Yale K.

    "Donovan and his team were very professional. High quality product. High quality professional installation. I will do business with him again!!"

    Ty W.

    "Some of the best service I've had for resolving my poor glass house issues, plus hyper competitive prices! Dono and Dawn absolutely rock, and were prompt and so helpful! Thanks!"

    Fort Collins door & window replacement experts

    At Lomax Window & Door Co, our team of professionals is highly trained and experienced in door installations and window replacement. We take pride in having a team of experts who are dedicated to providing top-quality window replacement services.

    Our technicians are knowledgeable and equipped with the latest tools and technology to ensure efficient and precise installation. We are committed to investing in the training and development of our team members, keeping them up-to-date with the latest industry standards and practices.

    With our team of technicians, you can trust us to provide the best window replacement service possible.

    Our specialties

    We offer a wide range of window and door services including installation, repair, and replacement, to fit all your needs and budget.


    Replacement windows

    We specialize in providing high-quality replacement windows to enhance the look and performance of your home.


    Window installation

    We offer professional window installation services to ensure that your new windows are installed correctly and efficiently.


    Window restoration

    We also offer window restoration services to bring new life to your old windows and help them function like new again.

    Install & replace

    Entry doors

    In addition to windows, we also offer professional entry door installation services to enhance the appearance and security of your home.

    Install & replace

    Patio doors

    We also provide patio door installation services to help improve the look and functionality of your outdoor living space.

    Install & replace

    Side doors

    Our team also expertly installs side doors to provide additional access and enhance the overall appearance of your home.

    Recent articles

    Stay up-to-date with the latest industry trends, tips and tricks by visiting our blog for informative articles about maintaining your windows & doors after a window replacement or door installation service.

    We proudly serve Fort Collins and the surrounding area

    • Loveland, CO
    • Fort Collins, CO
    • Arrowhead, CO
    • Timnath, CO
    • Windsor, CO
    • Masonville, CO
    • Longmont, CO
    • Berthoud, CO
    • Eaton, CO
    • Greeley, CO
    • Wellington, CO
    • Cheyenne, WY
    • And more!

    Current offer on windows & doors

    Any combination of windows & doors. Must mention coupon at time of consultation. Offer not valid with other coupons.

    Any 5+ gets 5% off.

    Any 10+ gets 10% off.

    Any 15+ gets 15% off.

    Any 20+ gets 20% off.