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 people 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.