Historic Replacement

We don’t just make windows. We recreate history.

Recreating History Across New England

JB Sash and Door has been preserving the historic beauty of Greater Boston for almost a century. Born as a custom millwork shop, JB Sash has recreated thousands of the unique windows and doors that embody our iconic local architecture. Our JB Proper Bostonian replacement windows can be found in every corner of the city.

Based in History, Built for the Future

The Architectural District Commissions of Boston have high standards when it comes to authenticity of window replacement throughout the city. Our artisans are experts at recreating and replacing historic windows, and understand the nuances and necessities of getting designs approved.

We construct windows that honor the beauty of the past while implementing features built for the future. All JB Proper Bostonian windows incorporate the latest technology in energy efficiency.

Locally Manufactured in Massachusetts

We craft all of our JB Proper Bostonian replacement windows in Chelsea, MA for true New England authenticity.

Our Turnkey Solution

We offer a complete turnkey solution to meet your historic window replacement needs.

what our customers are saying

“ JB door and Sash replaced my windows in Back Bay and it has been life changing! They did an amazing job. Handled the landmarks commission approval, matched the interior and exterior paint colors, and the installation was a breeze. They put down plastic to cover my floors and furniture, and cleaned up after themselves, you would never know they were there. I actually threw a party 4 hours after they left and I did not need to clean up after them at all! ”

“I hired JB Sash and Door to replace five custom windows. The windows required the approval of the South End Landmarks Commission. JB handled the whole process from initial measuring to permitting to final installation seamlessly. The windows were well designed, all materials appear to be first class, the finishes are superb and the workmanship is as good as it can get.”

“JB Sash & Door helped make the approval process so easy for us. And I love my "new old" windows!”

Custom-made in pine, red grandis, or mahogany to fit any opening
True divided lights with insulated glass that reduces sound and increases energy efficiency
No visible jamb liner from exterior to maintain historic appearance
Upgraded functionality with tilt wash for easy cleaning
Muntin bars available in the size required to meet your specs
Available in bowed or radius top styles

Meet Our Replacement Solutions Team

Our installation team is very responsive, and takes the time to understand customers’ needs and concerns. They will help you understand the process every step of the way, ensuring nothing feels overwhelming. They help transform your space and bring your vision to life.

Replacement Specialist

Gary Troy

Installation Sales

Marilyn Garrett

Installation Coordinator

Heidi Beaudoin

Replacement Specialist

Andrew Clark

From Our Inspiration Center

Historic Window & Door Replacement and Installation in a historic home in Boston MA

Tips for Replacing Historic Windows

There’s a lot to know when replacing windows on a historic building. Find out about the regulations, who enforces them, and what the National Parks

A display room shows various shapes and sizes of windows.

You’ve Never Been Boston Window Shopping Like This

Marvin Windows and Doors have the power to transform a room; nowhere is that more evident than at JB Sash & Door’s brand new Marvin Window