Occupants in a tenement on La Cross Terrace, in Glasgow's Kelvinbridge area, were left for nine hours after a staircase collapsed.
Six adults and one child were in the building when part of the stone staircase fell away in the early hours of Monday morning.
Fire crews were called to investigate at 2.25am.
Residents were advised to stay in their homes while a meeting between the council and fire officials took place.
They were not rescued until 11.25am, when the stairs were deemed too unsafe to use.
Glasgow Kelvin MSP Sandra White said: "If it was deemed to be unsafe those hours later then obviously it was unsafe throughout the night. The fire brigade really should be asked the question, why were people not evacuated immediately?
"It was lucky that it didn't collapse."
Two women and one man were rescued from the third floor window by fire officers using a high reach aerial rescue pump. A third woman was rescued by a ladder.
A spokesman from the fire service said expert structural engineers were consulted to see if the stairways could be made safe.
It was deemed safer for firefighters to rescue occupants through the windows.
No one was injured and all residents have found alternative accommodation.
A Glasgow City Council spokesman said: "On the evening of September 8, the close staircase began to fall away in this tenement. As a result the residents were evacuated and the building and staircase is now propped up and has been deemed a dangerous building."