Calderdale will have to find nearly 15,000 homes by 2026, according to forecasts.
The district has some of the most affordable homes in the region but needs many more and faces a surge in the number of people living alone.
Two and four-bedroom accommodation will also become much sought after.
Brighouse, Southowram, Hipperholme and Mytholmroyd have all been identified as hotspots for more affordable homes.
The findings come from The Strategic Housing Market Assessment and the Economic Viability Assessment commissioned by Calderdale Council.
They will be considered alongside the district’s local development framework and the Government’s planned changes to planning policy.
The assessment suggest households will increase by between 860 and 1,070 a year up to 2026, driven by natural population growth and migration from neighbouring boroughs.
It said affordfable need could be met by buying 50 per cent equity stakes in properties rather than full sales.
But, the assesssment warned, provision of affordable homes was dependent on a healthy housing market and current conditions were very difficult.
Currently, there are more than 3,500 existing permissions for houses that have not yet been built, and the council is successfully reducing the number of long-term empty properties – currently around 3,000.
Council head of housing Mark Thompson said the studies provided a wealth of statistical information and policy propositions and public consultation would follow.