WATERTOWN, MA—The more than $400-million two phased “Arsenal Yards” project could break ground in the late spring of 2017 and when fully built out will feature 350,000 square feet of retail and entertainment space, more than 500 apartments and 100,000 square feet of existing office space.

BOSTON—The for sale-inventory of single-family detached homes in Greater Boston fell 26.4% to 2,769 homes on the market last month, down from the 3,762 units posted last October. Condo inventory declined 21.1% to 1,616 as compared to the 2,050 condos on the market in October 2015.

CAMBRIDGE, MA—Shire's lease begins in the third quarter of 2018, with occupancy anticipated in the first quarter of 2019. Shire says the firm plans to hire an additional 400 workers in Massachusetts.

BOSTON—The 320,000-square-foot building at 660 Summer St.to be developed by the Wellesley, MA-based firm, will feature a mix of 245 select-service hotel rooms and 166 extended-stay hotel rooms.

Here is a roundup of the latest leases, sales and other transactions in the Northeast middle markets.

EAST CAMBRIDGE, MA—The Pasadena, CA-based office REIT acquired the 644,771-square-foot office/laboratory complex from DivcoWest of San Francisco.

Here's a look at this week's announcements and deals that you may have missed in the Northeast region.

Here's a look at this week's announcements and deals that you may have missed in the Northeast region.