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Professional Window and Door Replacement Services in Leesburg, VA

The Installation of Windows | Offers Premium Window

The Nassau Window Installation Advantage

Our professionals use the most advanced technology when building our windows and doors.

Local Contractor Expertise

To ensure a positive exterior remodeling experience for our customers, we only partner with qualified local contractors with replacement window and door installation expertise.

Superior Windows & Doors

EcoView’s high-quality, durable products are designed for long-term beauty and energy-efficiency that lasts – saving you money for many years to come.

Exceptional Selection and Service

In addition to the vast product offerings and options available, you benefit from the expertise of our contractors for product selection and design support.

Our Comprehensive Window Installation & Doors Services Offered for Leesburg, Virginia, Homes

Window Replacement Leesburg, VA

When it comes to window replacement in Leesburg, VA, our team delivers unmatched expertise. We understand that each home is unique and requires a personalized approach to window replacement. Our professionals work with various window styles, such as double-hung, casement, picture, bay, windows awning, siding, etc. We ensure you find the perfect match for your home’s architectural style and energy efficiency needs.

Window Installation Leesburg, VA

Our team is experienced in providing residential window installation, ensuring a seamless process that enhances your home’s aesthetics and energy efficiency. We specialize in installing various window types, such as energy-efficient windows, vinyl windows, and impact-resistant windows, catering to the diverse needs of Leesburg homeowners. Trust our skilled team to provide a flawless installation that complements your home’s appearance and performance.

Door Replacement Leesburg, VA

We offer door replacement services, helping homeowners upgrade their homes’ security, efficiency, and curb appeal. Our team is expert in handling various replacement doors, including entry doors, patio doors, sliding doors, storm doors, and more. Whether you’re looking for a stylish front door to boost your home’s curb appeal or a secure, energy-efficient patio door, our experts will guide you through the selection process and ensure a seamless replacement.

Door Installation Leesburg, VA

Our door installations ensure your new door is properly fitted, providing optimal security and energy efficiency. We specialize in installing a wide range of doors, including impact doors, front doors, French doors, and sliding patio doors. All doors we install are tailored to your home’s specific requirements. With a keen eye for detail and a commitment to quality, our team will guarantee that your new door installation meets the highest industry standards, protecting your home and enhancing its appearance.

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About Nassau County Window Installation LLC in Leesburg, VA

Nassau County Window Installation is a family-owned business with deep roots in the community and a firm commitment to providing top-quality services. We have been an integral part of Leesburg for many years, helping homeowners and business owners with their window replacements and door installation projects.

We are passionate about enhancing your property’s comfort, efficiency, and aesthetic appeal. Our dedicated service and personalized touch have enabled us to establish ourselves as one of the most trusted teams in Leesburg. We’re about building long-lasting relationships with our clients, providing you with peace of mind and confidence in your preferences.

Nassau County Window Installation LLC Expert Window & Door Replacement Team

Our team consists of skilled professionals with extensive window and door industry knowledge. We are a family dedicated to providing exceptional service, ensuring your home or commercial property improvement project runs smoothly from start to finish.

We are committed to continuous learning and improvement, staying updated with the latest trends and technologies in the window and door industry. This dedication enables us to provide our clients with innovative solutions tailored to their unique needs and preferences.

We Proudly Serve Greater Leesburg, VA, area and the Surrounding Communities

Delivering excellence right to your doorstep, we proudly extend our superior window and door services across Leesburg, Virginia, and its neighboring areas. Our familiarity with the local architecture and weather conditions allows us to offer personalized solutions that truly resonate with your home improvement needs.

We serve the following locations:

  • Dulles, VA
  • Herndon, VA
  • Reston, VA
  • Germantown, MD
  • North Potomac, MD
  • Chantilly, VA
  • Wolf Trap, VA
  • Gaithersburg, MD
  • Green Valley, MD
  • Montgomery Village, MD
  • Potomac, MD
  • Centreville, VA
  • Oakton, VA
  • Vienna, VA
  • Rockville, MD

The Ultimate Guide to Window Types for Leesburg Homeowners

If you’re planning a home project to replace windows in Leesburg, Virginia, understanding the types of windows available is crucial. With window replacement companies offering a wide selection, it can get overwhelming. From awning windows to casement and picture windows, this guide aims to simplify your choices, ensuring you make an informed decision for your Leesburg window replacement.

Single-Hung Windows

Single-hung windows are a universal choice and are typically less expensive than their double-hung counterparts. With one window sash that moves vertically, they are easy to operate and excellent for letting in natural light. For homeowners seeking a cost-effective option, our team offers high-quality windows that can be installed within several weeks, enhancing work quality and giving you a fantastic experience.

Double-Hung Windows

Double-hung windows are a popular pick among Leesburg homeowners due to their versatility. Both sashes move, offering excellent ventilation options. Installing energy-efficient double-hung windows can also help you save money by enhancing your home's energy efficiency. When it comes to installing energy-efficient windows, our experts provide a detailed estimate, transparent financing options, and prior work references for your peace of mind.

Casement Windows

Casement windows are hinged at the sides and swing outward. They provide excellent ventilation and unobstructed views. If you're thinking of windows installed by experienced professionals, casement windows are an excellent choice. Our team, known for its work quality and other services, ensures that the installation in Leesburg, VA, will be completed to the highest standards, matching your previous home's window quality if needed.

Awning Windows

Awning windows hinge at the top and open outward, providing unique functionality. These windows are superb for letting in natural light while keeping rainwater out, which is especially useful for the varying weather in Northern Virginia. With our window installation services, you'll find that awning windows are a type of window that can effectively prevent cold air from entering, adding to your home's comfort.

Sliding Windows

Sliding windows, sometimes referred to as gliding windows, move horizontally rather than vertically. They are easy to operate and offer another way to save money on your energy bills. Perfect for replacement in Leesburg, VA, our sliding doors and windows are built with high-quality materials, and we even offer vinyl replacement windows for added efficiency.

Picture Windows

Picture windows are fixed and do not open. They are excellent for bringing in natural light and giving you unobstructed views of the outdoors. Picture windows are perfect for rooms where ventilation is not a concern. Our team at American Home Contractors recommends picture windows if you've received quotes for windows that focus on increasing natural light without compromising on energy efficiency.

Bow and Bay Windows

Bow windows and bay windows are fantastic for creating a focal point in a room and letting in more light. These types are usually a combination of several windows that protrude from the home, creating extra space. For those residing near Bailey Ln. or Manassas Park, investing in these windows for the second time can be a great experience, thanks to our range of financing options and exceptional workmanship.

Most Energy-Efficient Window Replacement Brands for Leesburg Homeowners

As the work begins on your home project, one of the most important factors to consider is energy efficiency. While the type of window is vital, choosing the right brand can make all the difference, especially for replacement windows in Leesburg. Here, we delve into some of the most energy-efficient window brands that can perfectly fit your previous home or a new project.

Andersen Windows

Andersen is a well-known brand that offers various energy-efficient options, including Low-E glass. Trusted by window companies and windows installers alike, they set the bar high for thermal insulation. They also offer a variety of styles that can replace regular windows, making them a staple in the window nation.

Milgard Windows

If you're in Leesburg and looking for a brand that specializes in vinyl windows, Milgard is a great option. Not only do they offer windows replaced with top-notch vinyl frames, but their energy-efficient features are hard to beat. The company offers a unique package of Low-E coatings, ensuring maximum energy savings.

Pella Windows

Another esteemed name in the window nation is Pella. Known for their quality and durability, Pella's windows come with multiple panes and gas-filled options for maximum insulation. Many window installers recommend Pella for its focus on sustainability and energy conservation.

Marvin Windows

If you're seeking a blend of style and efficiency, Marvin is your go-to brand. Frequently used in upscale projects, Marvin windows offer a range of Low-E options and come in styles that can complement any previous home. Not only are they recommended by various window companies, but their innovative approach also helps lower your energy bills.

Simonton Windows

Simonton is often praised for its broad range of options, making it easier for Leesburg homeowners to find exactly what they're looking for. With their focus on vinyl windows and Low-E technology, Simonton is a reliable choice for those looking for both affordability and efficiency.

Bow and Bay Windows

Bow windows and bay windows are fantastic for creating a focal point in a room and letting in more light. These types are usually a combination of several windows that protrude from the home, creating extra space. For those residing near Bailey Ln. or Manassas Park, investing in these windows for the second time can be a great experience, thanks to our range of financing options and exceptional workmanship.

Why Choose Nassau County Window Installation LLC

We keep our fingers on the pulse of our industry’s latest trends and technological advances. This commitment to innovation enables us to offer you cutting-edge solutions tailored to your unique needs, ensuring that your home is up-to-date and future-ready.


Our team’s collective expertise has been honed over years of dedicated work in the window and door industry. We’ve tackled diverse challenges, innovated unique solutions, and always emerged victorious. This wealth of experience directly benefits your home improvement project, ensuring we deliver precise, high-quality, and efficient work every time.

High-Quality Products

We firmly believe in providing products that stand the test of time. We’ve partnered with top-tier manufacturers known for their exceptional quality to ensure this. The windows and doors we source for you are aesthetically pleasing. They are robust and durable, providing you with years of comfort and peace of mind.

Customer Satisfaction

For us, your satisfaction is the benchmark of our success. Our team works relentlessly to ensure a smooth, enjoyable, and rewarding home improvement experience for you. We listen, understand, and deliver – going the extra mile to meet and exceed your expectations. Plus, we offer a free estimate and quality service at the most reasonable price!

Wide Range of Services

Our comprehensive suite of services means you can trust us with all your home improvement needs. Whether it’s window installation or door replacement, our team has the skills and experience to deliver excellent results. Our complete range of services simplifies your home improvement journey, saving you time and effort in finding multiple service providers.

Innovative Solutions

We keep our fingers on the pulse of our industry’s latest trends and technological advances. This commitment to innovation enables us to offer you cutting-edge solutions tailored to your unique needs, ensuring that your home is up-to-date and future-ready.

Energy Efficiency

Our carefully selected range of products and expert installation services are designed with a keen focus on energy efficiency. With our windows and doors, your home will better regulate its temperature, reducing the strain on your heating and cooling systems and significantly saving your energy bills over time.

Local Knowledge

Our roots in Leesburg, VA, give us a profound understanding of the local area’s unique needs. We are intimately familiar with the climate and prevailing architectural styles. This familiarity allows us to provide services that are perfectly suited to your home and environment. Our local knowledge translates into tailored solutions that truly enhance your living spaces.


Every team member is a seasoned professional committed to delivering exceptional service. We respect your time, your home, and your vision for it. Our team members will always arrive on time, work efficiently, maintain a clean workspace, and ensure minimal disruption to your routine. Trust us to treat your home as if it were our own.

Our Doors Installation and Replacement Windows Process

Window installation Leesburg VA & replacement operations are centered around your specific needs, from the initial consultation to aftercare. We ensure each step is meticulously carried out, guaranteeing top-tier results and an enjoyable home improvement journey.

Every great home improvement project begins with understanding the homeowner’s unique needs, desires, and budget. That’s why we kick off our process with an in-depth consultation. We listen to you, understand your vision, and use our expertise to offer guidance and options. This dialogue ensures we align with your expectations and sets the stage for a successful project.

Once we have a clear understanding of your needs, we will meticulously inspect your existing windows and doors. This step helps us identify potential challenges or underlying issues impacting the project. Our thorough inspection ensures no surprises down the line and that our recommendations are grounded in a comprehensive understanding of your home’s current state.

Considering the insights gathered during the consultation and inspection, we offer you personalized recommendations. These suggestions are based on your stated goals and budget and our industry expertise and knowledge of local trends. We aim to provide advice that enhances your home’s aesthetics, functionality, and energy efficiency.

Once we have your approval, our highly skilled team swings into action. Our installer team performs the installation meticulously, ensuring that each window and door fits perfectly and operates smoothly. We adhere to the highest industry standards during installation, promising you optimal performance and longevity from your new windows and doors.

After the installation, we don’t just pack up and leave. Instead, we conduct a comprehensive review to ensure every window and door has been installed to our exacting standards and that our workmanship meets your expectations. This post-installation review is our commitment to quality and your assurance of a job well done.

Our relationship with you will continue once the installation is complete. We stand by our work and provide ongoing aftercare services to ensure your new windows and doors continue to perform at their best. Whether it’s maintenance tips or addressing minor adjustments, we’re here to ensure your satisfaction in the long run.

The Definitive Guide to Our Window Installation Styles for Your Leesburg, Virginia Home

When it comes to window installation in Leesburg, Virginia, the style of window you choose plays a critical role in the overall look and feel of your home. Styles can range from traditional to modern and everything in between, meeting both aesthetic and functional needs. Whether you’re replacing windows in your previous home or installing new ones, here’s a deep dive into window installation styles you should consider.

Traditional Window

The epitome of timeless beauty, traditional windows remain popular in Leesburg, Virginia. Their intricate details and classic designs make them ideal for Colonial or Victorian homes. Often found with wood or aluminum materials, these windows provide a vintage charm. They often feature multi-pane glass and could be great with tempered or frosted options for privacy and security.

Modern Windows

Modern windows bring a sleek, minimalist look to your home. These windows often feature large, unobstructed panes of glass, which not only add aesthetic appeal but also let in an ample amount of natural light. With an emphasis on clean lines and simplicity, modern windows often come in neutral frame colors like white, gray, or black. These windows fit well with contemporary architecture and usually feature energy-efficient glass options like Low-E or argon gas-filled chambers.

Contemporary Windows

Contemporary windows offer a blend of modern design with a touch of traditional elements. Think of it as the best of both worlds. These windows often feature vinyl or fiberglass materials that require minimal maintenance. Plus, they come with a variety of glass options, like tinted or decorative, offering you a wide selection to fit your home's specific needs.

Craftsman Style

Rooted in American architectural tradition, Craftsman style windows are characterized by their handcrafted aesthetic and focus on natural materials. Usually made of wood or vinyl, they offer various energy-efficient options, like double-pane or even triple-pane glass. These are perfect for homeowners looking for a harmonious blend of form and function.

Colonial Style

Colonial windows are all about symmetry and balance. These are usually double-hung or casement windows, offering practicality along with their visual appeal. They fit perfectly in homes that value architectural authenticity, often featuring grids or mullions that divide the window into smaller panes.

The Importance of Certifications in Choosing a Window Company for Your Leesburg, Virginia, Home

So you’ve decided to dive into the world of window replacement in Leesburg, Virginia. But before work begins, it’s crucial to choose a reputable window company. One of the most reliable indicators of a company’s quality is its certification. Here’s what you should look out for.

Energy Star Certification

An Energy Star certification indicates that the window company adheres to government standards of energy efficiency. This means that the windows installed will not only help you save money on energy bills but also contribute to a more sustainable environment. Such windows usually come with energy-saving features like Low-E glass and argon gas-filled panes.

BBB Accreditation

A window company that's accredited by the Better Business Bureau (BBB) is a safe bet for high-quality work. This certification implies that the company has met specific standards for transparency, honesty, and integrity. When you're getting replacement windows in Leesburg, a BBB-accredited company is an excellent choice for dependable service.

Manufacturer Certifications

Manufacturers often certify companies as trusted installers of their products. This ensures that the windows are installed correctly, which can be a significant factor in how energy-efficient and durable they end up being. The wrong installation can negate the energy-saving features of even the best windows.

Installation Masters Certification

InstallationMasters is an industry-standard certification that focuses solely on the installation process. Window companies with this certification have their work inspected to ensure it meets the highest standards. Whether you’re replacing windows in your previous home or embarking on a new project, having InstallationMasters-certified professionals gives you an added layer of assurance.

NARI Membership

The National Association of the Remodeling Industry (NARI) also provides certifications that are highly respected in the remodeling sector. If a window company in Leesburg, Virginia, is NARI-certified, it means they have undergone an extensive screening process and follow industry best practices.

Exploring the Glass Options for Window Replacement in Leesburg, Virginia

In the realm of window replacement in Leesburg, VA, glass is not merely a transparent wall—it’s a key component affecting energy conservation, aesthetic excellence, and safety features in residential windows. Our team is proficient in guiding Leesburg homeowners through a multitude of glass choices, offering services from window installation to window repair with unparalleled price transparency.

Low-E Glass Windows

When energy efficiency is a priority, Low-E (Low-emissivity) glass windows stand out. These windows have a fine coating that restricts the infiltration of UV and infrared rays while allowing abundant visible light. When it comes to window installation in Leesburg, VA, our team can fit your home with Low-E glass, significantly optimizing energy expenditures.

Double-Pane and Triple-Pane Glass Windows

Double-pane and triple-pane glass windows are insulation titans, featuring multiple layers of glass separated by air or inert gas. These windows are essential for Leesburg's variable climate, providing top-notch energy efficiency and reducing the need for frequent window repair.

Frosted Glass Windows

Frosted glass windows offer an effective solution for those seeking privacy without sacrificing natural light. This makes them popular for various residential windows, particularly in bathrooms and basements. Our window designs are flexible, allowing you to customize privacy levels while maintaining aesthetic appeal.

Tinted Glass Windows

Tinted glass windows serve to cut down on glare and UV exposure, making them ideal for rooms with lots of direct sunlight. Our services offered in window installation in Leesburg, VA, include these tinted options, all backed by our commitment to price transparency.

Tempered Glass Windows

Tempered glass windows break into small, harmless bits instead of dangerous shards, making them a vital option for safety. Our team offers repair and installation services for tempered glass, ensuring you experience enhanced security alongside aesthetic satisfaction.

Decorative and Obscure Glass Windows

Decorative and obscure glass options give you the chance to express your aesthetic vision. These window designs bring an element of artistic flair to your home, and they pair well with various windows siding and doors windows options.

Impact-Resistant Glass Windows

Impact-resistant glass windows are especially useful for homes in areas susceptible to severe weather conditions. Our team's transparency services ensure you're aware of all aspects involved in the installation or repair of these fortified windows.


Here is our window installation leesburg va & door installation leesburg va reviews, especially, about the price of our residential & patio door.

I recently had the Nassau County Window Installation team replace the windows and entry door in my Leesburg home, and I couldn’t be happier with the results. Not only do the new windows look fantastic, but they’ve made a noticeable difference in the overall energy efficiency of my home. The entire process was smooth and professional, from the initial consultation to the final installation. I highly recommend their services.

Jonathan W.
Leesburg VA

Nassau County Window Installation recently installed a new storm door and a French door at my home in Leesburg, and I am thrilled with the outcome. The team was extremely professional, courteous, and attentive to detail. My new Leesburg doors have significantly enhanced my home’s curb appeal and provided an added layer of security. I would definitely recommend this company to anyone considering a door installation project.

Laura C.
Leesburg VA

We had Nassau County Window Installation replace our old, drafty Leesburg windows with new energy-efficient ones, which has made a difference. The team was very knowledgeable and helped us select the perfect windows for our home. The installation process was quick and hassle-free, and we couldn’t be more pleased with the final result. Highly recommended!

Mark T.
Leesburg VA

My office building in Leesburg required new windows, and we decided to hire Nassau County Window Installation for the project. They were professional, efficient, and the quality of their work was top-notch. The new windows have dramatically improved the appearance and comfort of our office space. I would not hesitate to recommend them to other businesses in need of window replacement services.

Samantha J.
Leesburg VA

Nassau County Window Installation recently completed a door installation at our commercial property in Leesburg. Their highly professional team worked around our business hours to minimize disruption. The new doors are not only visually appealing but also provide enhanced security. I would gladly recommend their services to other business owners.

David P.
Leesburg VA

I hired Nassau County Window Installation for a window replacement project at my retail store in Leesburg, and I am extremely satisfied with their work. The team was responsive, professional, and respectful of my business’s needs. The new windows have given our store a much-needed facelift, and our energy costs have decreased significantly. If you’re searching for reliable, high-quality service for windows doors, Leesburg residents can trust their experienced team to deliver exceptional results.”

Rebecca M.
Leesburg VA

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Get Started Now!

Ready to embark on your home improvement journey? Our team is eager to assist you in transforming your space with high-quality window and door solutions. We are committed to providing exceptional service, ensuring a seamless and enjoyable experience.

Contact us today to schedule your consultation and request a free quote. Take the first step toward enhancing your home’s comfort, beauty, and efficiency!

Frequently Asked Questions

Typically, signs such as drafty windows or doors, difficulty in opening or closing them, condensation between glass panes, or noticeable damage indicate that it might be time for a replacement or new installation. Energy bill increases could also indicate inefficiency in your current windows or doors.

The duration of the installation process can vary depending on the complexity and size of the project. However, an experienced team can install a window or door within a few hours. Our team works efficiently to ensure minimal disruption to your day.

Absolutely! Energy-efficient windows and doors can significantly reduce heat transfer, helping to maintain a comfortable indoor temperature. Your space will need less reliance on heating and cooling systems, resulting in lower energy bills. Plus, they’re great for the environment!

Maintaining your windows and doors involves regular cleaning and occasional inspections for any signs of wear and tear. Specific care instructions may vary based on the material and type of your windows and doors. Our team provides comprehensive aftercare advice tailored to your installation.

While handling window and door replacements as a DIY project is possible, it’s not generally recommended unless you have professional training. Improper installation can lead to problems, from leaks and drafts to structural damage. Our team has the experience and skills always to ensure a perfect fit.

The cost can vary depending on several factors, including the size and type of the window or door, material, and labor costs. We provide a detailed quote after the initial consultation and inspection, ensuring transparency and no hidden costs.

Yes, we understand that every home is unique and may require custom solutions. We offer a variety of custom window and door options to suit your specific needs and preferences. Whether it’s a specific style, size, or material you’re after, our team can help you find the perfect fit for your home.

Our team takes great care to protect your home during the installation process. We use drop cloths and shoe covers to keep your floors clean. We clean up thoroughly after the installation is complete. We also follow all safety guidelines to ensure our team’s and your family’s safety. Your home’s care and cleanliness are top priorities for us.

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