Bay State taxpayers are already helping foot the bill for the state’s budding convention industry.

BJ’s Wholesale Club is laying plans to move its corporate headquarters from Natick to the former National Grid campus in Westborough, according to multiple industry sources.

Robert Keeley has seen this play before. Twenty years ago, when he founded Diversified Project Management, “the economic climate was very similar. Our early clients weren’t relocating. They were downsizing. They were closing a building, and we were going in and moving the 11 people who weren’t laid off, consolidating them into another building, and liquidating the assets of the building. It was kind of ugly, depressing work.” The ugly days are back, but DPM has gritted them out, thanks to a diversified base of project experience, deep client relationships, and a willingness to adapt.

The Castle Square Apartments in Boston’s South End are cold and drafty. As such, they’re also awfully expensive to maintain. Now the complex’s co-owners, the Winn Companies and the Castle Square Tenants Organization, are embarking on an extensive rehabilitation project to improve the property’s efficiency, slash its operating costs, and, the owners believe, create a model for bringing an urban renewal-era development into the 21st century.

Jones Lang LaSalle has recently completed a 43,500-square-foot LEED-CI Gold project at the Microsoft New England Research & Development Center at One Memorial Drive in Cambridge.

Consigli Construction Co. Inc. was recently recognized by the Massachusetts Family Business Association as the overall winner in the “large” category in the annual awards campaign honoring area companies for their leadership as family-owned businesses.

A 15,000-square-foot manufacturing facility in Newburyport, formerly occupied by Northeast Quality Products, has been sold for $850,000.

Greater Boston Real Estate Board, an advocate for the real estate industry, has retained Diversified Project Management to manage the relocation of its offices to a 10,795 square foot space at One Center Plaza in Boston.

A set of mixed-used buildings on Massachusetts Avenue in Arlington have been sold to 369 Mass. Ave. Nominee Trust for $850,000, according to a statement.

On-Q-ity, an oncology diagnostics company, has leased 17,701 square feet of office and lab space at 610 Lincoln St. in Waltham from Hobbs Brook Management.

Exalpha Biologicals, which conducts biological research and development for the medical industry, has leased 6,000 square feet of lab space in Shirley’s Phoenix Park.

Street-Works LLC, master developer of New Quincy Center, has entered into an alliance with Boston-based Suffolk Construction in the $1.4 billion private-public reconstruction of the historic center.

A multi-million dollar renovation and expansion of Hotel Tria in Cambridge has been completed, and the hotel now features 53 newly-constructed business class rooms and 68 newly-renovated guest rooms.

Boston mortgage banking firm EagleBridge Capital has arranged $1.8 million in acquisition and permanent mortgage financing for CVS Plaza in Southwick to be anchored by a new CVS pharmacy.

The board of trustees of Newton REIT Hospitality Properties Trust has declared a regular quarterly dividend of $0.55 on its series B cumulative redeemable preferred shares.

Boston architects Wilson Butler Architects has launched Oasis of the Seas, the Royal Caribbean ship dubbed the “world’s largest cruise ship.”

Greenwich construction and heavy equipment rental company United Rentals has secured a lucrative contract in neighboring Massachusetts to serve as the sole-source equipment rental provider for state agencies through 2012.

Citizens Bank has leased 46,846 square feet at Legacy Place in Dedham, relocating its consumer finance, consumer and business banking and marketing departments from Norwood and Westwood.

The state Department of Environmental Protection (MassDEP) issued a $32,400 penalty to Moobarn Trust of Westfield for conducting site preparation work in a wetland in violation of the Massachusetts Wetlands Protection Act (WPA).