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

If you’re a homeowner in Manchester, Nashua, or anywhere in Hillsborough County, you’ve likely seen our trucks in your neighborhood. For over 12 years, The Window Source of New Hampshire has provided beautiful, energy-efficient double-hung replacement windows to homes across southern New Hampshire. We’re proud to deliver high-quality products and honest, local service backed by one of the best warranties in the industry.

Windows Designed for New England Homes

Our double-hung windows are built to handle Hillsborough County’s wide range of weather — from frigid winters to hot, humid summers. Each unit is crafted with insulated glass, fusion-welded frames, and precision weatherstripping to improve comfort and reduce energy costs year-round. Both sashes slide and tilt in for effortless cleaning, making them a favorite among busy homeowners looking for convenience and performance in one.

Professional Installation You Can Rely On

We don’t believe in one-size-fits-all solutions. Every window we install is custom-measured and manufactured to your home’s exact specifications. Our professional installers take pride in their craftsmanship and treat every project with care — ensuring a snug, efficient fit that stands the test of time. From consultation to cleanup, we make the process simple, transparent, and stress-free.

Proudly Serving Manchester, Nashua & Beyond

As New Hampshire’s most populated county, Hillsborough is home to diverse architecture — historic mill buildings in Manchester, classic colonials in Nashua, and charming homes in Bedford, Merrimack, and Amherst. We know these neighborhoods well and understand the importance of preserving your home’s character while enhancing its comfort and efficiency.

Get Your Free Estimate Today

Ready to upgrade your home with double-hung replacement windows that look great and perform even better? Contact The Window Source of New Hampshire today for a free, no-pressure estimate anywhere in Hillsborough County. Discover why homeowners across Manchester, Nashua, and the surrounding communities trust our local team for quality, service, and value that lasts.