A spokesperson for Persimmon Homes said: “In May 2017, Persimmon Homes and joint landowner PMG submitted an outline planning application for up to 618 homes at the site of the former Gwern y Domen farm, close to Caerphilly town centre.
“The application is unique in that despite district valuation putting affordable homes at just 12% of the development, it identifies 40% affordable housing.
“Persimmon Homes and PMG have worked closely with the council on this strategy and the homes will be first offered to the local authority to operate its own social housing scheme, before being offered to a nominated registered social landlord.
“This is the first such scheme in Caerphilly.
“We have been working closely with the council to create a development that will deliver much needed housing within the borough whilst mitigating any potential impact on the surrounding areas.
“In addition, it is anticipated the proposal will have significant positive economic benefits in the area. These include 335 direct construction jobs per year of construction, 506 indirect and induced jobs supported per year of construction and a gross value added of £15.1 million per annum.
“It would also bring increased council tax receipts of £690,000 per annum, an expected community infrastructure contribution of circa £2.1 million and a total household annual expenditure of £13.3 million within the local leisure and retail sectors.”