Carn Y Cefn is a £29m project bringing more than 250 much-needed homes to Ebbw Vale.
The development, led by Persimmon Homes, is on the site of the former Ebbw Vale Comprehensive School and College site.
A total of 55 of the properties will be available for social rent with United Welsh for prospective tenants on the Blaenau Gwent Council Common Housing Register.
As well as bringing much-needed new homes to Blaenau Gwent, Carn Y Cefn will create more than 200 jobs over the five-year construction period, as well as boosting the local economy by £7m per annum.
Persimmon has agreed to contribute £783,354 towards education provision, which will be split between Glyncoed and Willowtown Primary Schools.
More than 1,000 people have expressed an interest in the Carn Y Cefn homes, which are due to go on sale in late 2021, with the first occupants due in the spring and summer of 2022.