Greentown Labs logo


The Global Center for Cleantech Innovation 

444 Somerville Ave., Somerville, MA 02143

Greentown Labs in located in the heart of Union Square in Somerville, MA. This hidden gem community is just three miles north of Boston and a mile from Kendall Square, MIT, Harvard and Tufts University. Union Square is buzzing with entrepreneurs, artists and makers, and easily accessible by foot, bike or public transportation.

As a community that promotes clean technology and renewable energy, we encourage all visitors to consider sustainable transportation options when visiting Greentown Labs. We have a spacious bike room and lots of high-fives for everyone who takes advantage of alternate transportation. Zipcars and Hubway bikes are just around the corner with the two closest Hubway stations at Conway Park and Union Square.

Please note: Greentown Labs has extremely limited parking and cannot guarantee spaces will be available for visitors.

Questions? Give us a call! 888-954-6836




We love to welcome visitors at Greentown Labs! If parking is needed, we ask that visitors coordinate a guest parking spot reservation with their hosts. Once your host has notified you of your parking spot number, you can check in at reception to retrieve a parking pass for your dashboard for your reserved parking spot number. We also kindly ask that you honor the time of your reservation and move your car once your time slot expires. To accommodate other guests and the limited parking availability at Greentown we reserve the right to tow cars wrongfully parked without notice.


Currently, we have parking spots numbered 1-7 around the southeast corner (back of the building) of 444 Somerville Ave. and marked by “Greentown Labs Visitor Parking” signs. The visitor parking spots are in the East side alley of 444, the side closest to Market Basket, with additional spots on the back side of 444 along the main alley.


Interested in joining Greentown Labs?

Our team is always happy to host early-stage energy and cleantech companies that are interested in joining our community. If you’d like to schedule a private tour with our Director of Strategic Member Growth, Cayman Somerville, please contact her here.

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