WHITEFIELD — A 20-unit housing development got the green light last week. By a 4-0 vote, the Planning Board granted site plan approval for the four-building subdivision which will be located off Route 116 by the town office. Developer David Scalley of Scalley Enterprises LLC said the project would bring much-needed workforce housing to the area. It would be his third multi-unit rental property in Whitefield, and the others are filled to capacity with a 10-person waiting list, he said. “The town needs housing,” Scalley said. Scalley’s project addresses a statewide issue. New Hampshire faces a housing crisis with high demand, low availability, and a vacancy rate below one percent. The situation has become so dire that Gov. Chris Sununu has announced plans to use $100 million in federal money to increase the state’s housing stock.