Contractors, architects and engineers in Boston and across Massachusetts are heading back to work this week amid the launch of a phased reopening of the area's booming construction sector.

Boston began a phased restart of construction activity May 18, giving the green light to a wider range of essential core projects to move forward, like health care and housing. Projects such as condo towers are slated to restart next week in Boston, with the city having put a stop to all but emergency work in mid-March as coronavirus infections and deaths began to soar.