🪟 The Window Source Replacement Window Company in Rockingham County, NH Double Hung Windows Installed

At The Window Source of New Hampshire, Rockingham County isn’t just part of our service area — it’s home. Our main office and showroom are located right here in Seabrook, where we’ve been helping homeowners upgrade to beautiful, energy-efficient windows for more than a decade. When you choose us, you’re working with a local team that understands New Hampshire homes, weather, and values.

Energy-Efficient Windows Made for New England

Our double-hung replacement windows are a perfect fit for the changing seasons of coastal and southern New Hampshire. With insulated glass, durable weatherstripping, and precision-engineered sashes, they keep the cold air out in winter and the humidity down in summer. Both sashes tilt in for easy cleaning and open smoothly for better airflow — a practical, stylish choice that complements everything from historic Exeter homes to modern builds in Portsmouth or Derry.

Expert Local Installation

Because we live and work in Rockingham County, we know the region’s construction styles and building requirements inside and out. Each window is custom-built for your home, ensuring a tight, efficient fit. Our installers are trained, experienced professionals who treat every home as if it were their own — with clean, respectful work and attention to detail. Every installation is backed by a lifetime warranty for your total peace of mind.

Proudly Serving Rockingham County Communities

We’re proud to serve homeowners throughout Rockingham County, including Portsmouth, Hampton, Exeter, Derry, Londonderry, Salem, and Plaistow. Whether you’re near the coast or further inland, we bring the same level of service, quality, and reliability that’s made The Window Source a trusted name in home improvement.

Visit Our Seabrook Showroom or Request a Free Quote

Stop by our Seabrook, NH showroom to see our products in person, or schedule a free, no-pressure consultation at your home. Find out why so many Rockingham County homeowners choose The Window Source of New Hampshire for double-hung replacement windows that look great, perform even better, and last a lifetime.