On the 2500 block of East Hoffman, several boarded, vacant homes share the block with occupied houses. Before April, the house that Adopt-A-Block acquired had no back wall. It had been abandoned as long as some neighbors could remember, at least 15 years. Many of the building supplies, fixtures and appliances were supplied by Home Depot, a sponsor of the project for the past seven years. Home Depot’s Dundalk store manager, Steve Galliard, said the retailer and its charitable foundation started working with other groups on the house in late winter.