Millwork Solutions

Our custom mill shop is as old as the company itself, dating back to 1940 when our reputation for handcrafting windows began.

Welcome To Our Shop

For almost 100 years, the artisans in our millshop have crafted high quality architectural millwork for Boston’s contractors and homeowners. We specialize in intricate custom products, including historic windows, custom casings, and curved woodwork.

Custom Capabilities

Our JB Sash & Door millwork shop allows us to offer complete customization of our products. From recreating one-of-a-kind historic curved sashes, to crafting custom casing and sills, JB Sash can deliver highly sophisticated products as unique as your space.

Our Specialities

Historic window reproductions
Bowed and radius-top windows
Factory mulling
Shop applied custom casing, sills and extension jambs
Fast window and door repairs
Creative product solutions. Send us your ideas below.

what our customers are saying

“The only thing I would have done differently is ... I would have called JB sooner. As soon as they stepped into my home, I knew things were going to go smoothly!”

I searched for three months to find anyone to build me a window sash from scratch: carpenters, window companies, and other woodworkers. In the end, JB Sash was the only company we found that could handle this unusual job. They accepted the original (smashed) window sash as a model and built an exact replica, including the diamond, full-divided-light grill. Five weeks later, the window was ready, and it looked virtually perfect.

Replacing Windows in a Historic District?

We have been designing, building, painting, and installing historically accurate windows in Boston and beyond for more than 80 years. Our custom reproductions can match existing windows, and fit and brick or wood opening.

Our experienced team works with you to secure any necessary permits, and ensure your project is granted historic approval.

Have a Project in Mind?

Form instructions and expectations.