Greece, N.Y.—A four-alarm fire tore through a construction site here Jan. 24, collapsing part of an affordable seniors housing complex that had been just months away from its grand opening.

No one was hurt in the blaze, which was caused by a heating unit at the construction site, according to local news reports.

PathStone Corp., a Rochester, N.Y.-based nonprofit developer formerly known as Rural Opportunities, plans to continue working on the project as soon as the debris is cleared away, potentially including the rest of the fire- and water-damaged building. More than 100 seniors had applied to move into Ada Ridge Court II, a 45-unit building that had been scheduled to open in April. The seniors may now have to wait until 2010.

The development had received funds from the New York State Division of Housing and Community Renewal and Monroe County.

The construction site is across from a shopping mall and next door to the first phase of Ada Ridge Court, which includes 49 affordable seniors apartments that opened in 2001. Though the two buildings are connected by a covered walkway, the fully occupied first phase was undamaged by the fire.