sentences:  In 1997, the District of Columbia Housing Authority (DCHA), a nonprofit called Washington Innercity Self Help, and a company known as Innovative Design Solutions partnered to transform the townhouses into public housing.The city spent $5 million rehabilitating them, and in 2001 the three organizations supported residents of the properties in forming a cooperative, the Southern Homes and Gardens Cooperative, to own and manage the 90 townhomes.Under the city's agreement with Southern Homes and Gardens, the units must be managed as low-income public housing for 40 years.