A new report claims building affordable apartments in Dublin city is not commercially viable.
The Society of Chartered Surveyors says a two-bed medium-rise apartment costs a developer between €470,000 to €578,000 to build.
Building costs for lower rise apartments in the Dublin suburbs start from €293,000.
The society says building a three bed apartment is now more expensive than building a three bedroom house.
Paul Mitchell, one of the authors of the report said: "Height in terms of very high rise or tall buildings isn't really the solution , the higher that you build, the more expensive it costs.
"Buildings become less efficent and you have to spend a lot more money on structure."