At a time when many firms are looking to shrink their physical spaces, West Chester-based, full-service regional firm Lamb McErlane is expanding.

Earlier this month, the 42-attorney firm absorbed McMichael, Heiney & Sebastian. The move brings Lamb McErlane’s head count to 44 attorneys and adds a new office in downtown Oxford, Pennsylvania, to the firm’s three other offices, which, along with the West Chester location, includes offices in Philadelphia and Newtown Square.