MAYNARD, MA-The engineering firm signs a 10-year lease and expands from a headquarters also located here.

GLOUCESTER, MA-Morgan Stanley trades a 276-unit residential community for $31.5 million. The new owner may convert half of the units into condominiums.

BURLINGTON, MA-The robotics company takes an additional 24,120 sf here. The growth is due in part to the sales of its Roomba vacuum cleaner, which saw sales climb over the one-million mark in October.

BOSTON-The former Colony Group building will be redeveloped into 13 units, with a retail portion on the ground floor. Condos are expected to fetch $1,000 per sf.

CHARLESTOWN, MA-The architectural firm re-ups at 500 Rutherford Ave at Hood Business Park here.

BEDFORD, MA-The 400,000-sf office/R & D building goes to VinCo Properties. The property is currently under lease to Raytheon until the end of 2005, but preleasing is under way with new agent Richards Barry Joyce & Partners.

WOBURN, MA-The tile manufacturer relocates and expands to 25,000 sf. The expansion will allow Dal-Tile to open a showroom at new facility.

BOSTON-Heritage on the Garden restructures existing loan and Colonnade Residences gets a new construction loan.