The JB Shop

From custom millwork to our state-of the art paint shop, JB Sash sets the standard for custom window and door solutions. 

Complete Custom Capabilities

Your unique space deserves one-of-a-kind window and door solutions. We offer custom paint and millwork options to add a personal touch to any project.

Paint Shop

Let us save you time and money on your next project with our professional custom paint service.

Millwork Solutions

Our custom mill shop is as old as the company itself, dating back to 1940 when our reputation for handcrafting windows began. Our master craftsmen our ready to bring your project to the next level. 

Meet Our Craftsmen

Our team of skilled craftsmen add the perfect personal touch to any window or door solution. They are expertly trained help you realize your vision and bring it to life. 

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Replacing Windows in a Historic District?

We have been designing, building, painting, and installing historically accurate windows in Boston and the surrounding area for more than 80 years.

Our custom historic reproductions match existing windows and fit any brick or wood opening. We work to secure any necessary permits and help ensure your project is granted historic approval.

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Have a Project in Mind?

Form instructions and expectations.