This paper has developed a model to forecast the housing needs and affordability of the low-incomehouseholds in Thailand 2018-2037. The model has applied the baseline data from the Socioeconomicsurvey (SES 2015). Considering official population projections by the changing age structure and householdformations based on income, forecasts can be made about housing needed by ‘Renters’, who are thetarget group of the low-income households. Given, heuristic scenarios on households’ income growthover time, an initial planning model for affordable units of housing by types for renters has been proposed.