About Seacoast Replacement Windows

Plaistow, NH Favorite Window and Door Installation Company

Proudly Serving New England for Over 20 Years

An image of our Seacoast Replacement Windows crew in their white sweatshirts.

Seacoast Replacement Windows is proudly owned and operated by Mike Lewis and John Sullivan. With more than 20 years of combined experience in selling and installing high-quality replacement windows, they bring professionalism, attention to detail, and a personal touch to every job. Unlike many companies, Mike and John don’t just manage from behind the scenes—they’re the ones who come to your home, assess your needs, and walk you through the best options for your space. Their hands-on approach ensures consistency, quality, and clear communication from the very first consultation to the final installation.

Whether you’re looking to upgrade aging windows, replace a single unit, or refresh your home’s entire exterior, we likely have the right solution for you. We also specialize in entry and patio door replacements, offering a wide selection of styles, colors, and finishes to perfectly complement your home’s design. All of our products are chosen for their durability, energy efficiency, and aesthetic appeal. After installation, customers often report noticeable improvements in their home’s comfort, curb appeal, and even resale value.

Windows Matter More Than You Think

Windows play a crucial role in a home’s overall performance. Beyond their obvious functions of providing light and views, they protect your home from the ever-changing New England weather. From blistering summer heat to icy winter winds, properly installed modern windows create a barrier that keeps your home insulated, energy-efficient, and secure. They also contribute to noise reduction, making your home more peaceful and comfortable. Old or poorly sealed windows can lead to higher utility bills, water damage, drafts, and even structural issues. With our expert window and door replacement services, you can rest easy knowing your home is safeguarded for years to come.

Our Mission Statement

We will provide a superior product at a fair and consistent price. We will keep the customer’s best interest in mind, from the beginning of the process right through the installation. We will provide a service after the sale that is unparalleled in the home improvement industry.

Quick and Easy Quotes from Seacoast

Ready to upgrade your home’s windows or doors? For a quick and easy home consultation in New Hampshire or Massachusetts, contact us directly at 800-693-1307. Our team is here to help you find the right solution for your home—efficiently, affordably, and with the care only Seacoast can provide.