New England Window
& Door


New England Window
& Door

For more than 80 years, windows and doors from JB Sash have defined the unique architecture across Boston and the New England area.

You know your space, JB Sash knows windows and doors. Together, we find the solutions that work best for your residential or commercial project.

Our Story: Beyond Windows and Doors

Window & Door Installation Services

From selection to replacement, all the way through installation, we guide you through every step in the process. JB Sash offers you a full turn-key solution.
Let us help you select and install the best products for your home.

Around Every Corner

Our design center and Marvin showroom minutes from downtown Boston brings new meaning to the term “window shopping.”

Experience the JB difference for yourself when you see, feel, and compare our extensive selection with the guidance of our window and door experts.

Open to the public:
Monday - Friday
7:30am – 4:30pm


From start to finish we offer turn-key services for your window and door needs, we're here to make it painless.
Homeowner Services ►


From preliminary pricing to specification guidance, we’re here to be your technical support team.
architectural Services ►


From budget pricing to shop drawings and installation guidance, we're here to make it easier.
contractors Services ►
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Marvin Elevate Sliding French Door 


Marvin Elevate Double-Hung Window 

Shop the Look

Looking for inspiration? We compiled some of our favorite spaces to browse, with something for every style.

black double hung


black swinging patio


Featured Projects

Quality comes standard with every window and door from JB Sash, but no two projects are the same. Our skilled design partners are able to capture the light of any space, and seamlessly integrate form and function into every aspect of their work. See a selection of our past projects that highlights the diversity and expertise of our team and the unmatched quality from our design partners.

Roslindale Home

Roslindale Historic Home Renovation
Roslindale Home

Middlesex School

Reimagining a 1901 Heating Plant
Middlesex Project

New Innovations

Expand your space with the new box and skylight window products from Marvin. See how others are leveraging Marvin Skycove to connect to the world around them in a whole new way. 

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Have a Project in Mind?

Connect with the window & door experts

Our Trusted Partners

At JB Sash, we only partner with brands that share our commitment to the highest standards of excellence. We work exclusively with the following brands because they provide the quality that customers expect from JB Sash & Door. 

We are proud to offer our customers products from: