[sologoub]

33sq.m. was the norm for two adults. When you had a kid, you submitted paperwork for extra 10-15 sq.m., but usually got moved to a new development, not in a desirable area.

My parents went through it in 80s. By then this mostly worked for military/otherwise connected families, but has broken down for the rest of the country with wait list numbering in years. In theory you gave up smaller apartment for a slightly larger as need arose. In practice, most families did not want to move far and construction pace did not keep up for economic reasons.