BILLERICA, MA-Lexicon Inc., a Harman International Co., leases 19,100 sf of flex space at 16 Progress Rd. The company, which specializes in digital audio, already has a facility in nearby Bedford and took this space for expansion purposes.

BOSTON-MassHousing, the state's affordable housing bank, commits $25.2 million to the redevelopment of Maverick Gardens, an East Boston public housing project that will be converted into 396 units of affordable rental housing.

WATERTOWN, MA-OATSystems signs a lease for 7,557 sf of office space at 125 Walnut St. The software company, founded in 2001 by a team of MIT and IIT graduates, is relocating from 42 Spring St.

PLYMOUTH, MA-Wal-Mart puts its 123,098-sf store at 381 Court St. up for sale. The retail giant has outgrown this location and wants to build a supercenter at Plymouth Gateway off of Commerce Way in the Plymouth Industrial Park.

CAMBRIDGE, MA-IBM sells One Rogers St. and One Charles St. to an affiliate of Rockwood Capital Real Estate Fund IV for $84.5 million. The adjoining first-class office buildings total 360,000 sf and were acquired by IBM when it bought Lotus Development Corp.

MEDFORD, MA-SWW Realty Trust sells an 11,000-sf building at 226 Mystic Ave. to Gurdwara Guru Nanak Darbar. The group paid one million dollars for the property and plans to convert the building into a Sikh Cultural Center.

CAMBRIDGE, MA-SMaL Camera Technologies leases 18,382 sf of office space at 10 Wilson Rd., a deal that is indicative of the local market where sublease space continues to drive up availability rates.

DEVENS, MA-Robert Walker's plan to build a 248,000-sf mixed-use development suffers a setback after its approval is challenged by a selectman in Ayer. The project involves a hotel, a conference center, an office building and retail space.