They tried to do this in Stockholm, but in the end it completely messed up the apartment market. People end up queing for years, or you buy on the black market for vastly inflated prices.
Demand creates supply, but not necessarily at the price point you want.
The best housing policies work with the market, and use regulation to keep NIMBYs in check, update zoning as necessary and allow builders to build enough m2 to satisfy demand.