BOSTON (WBZ NewsRadio) — For developers, finding a place to put a new building in downtown Boston is like playing Tetris, and every block costs millions of dollars. It seems every inch of space is either already spoken for, has something already built on it – or would require new laws of physics to build anything new. Falling somewhat into the final category is the plan for 138 Arlington Street in Bay Village, recently greenlit by the Boston Zoning Board of Appeals.