The proposed extension in north-west Cardiff, to be known as Plasdwr, would also include shops, offices, schools, health centres, leisure centres, pubs and restaurants, according to developer Redrow Homes.
The north west of Cardiff is earmarked for development in the local authority’s Local Development Plan document.
The plan has been approved by the council and is currently being considered by a planning inspector, with a decision due in October 2015.
If the development plan and the masterplan for the urban extension are approved, the developer says work is likely to begin at the start of 2016 and last 15 to 20 years.
In September, Redrow, in partnership with landowner Plymouth Estate, submitted two development proposals to Cardiff Council for planning permission – one to develop 630 homes and a primary school and a second for 290 homes – and these are intended to form the first phase of the masterplan.