Robertson Partnership Homes has taken responsibility for the failings and is carrying out repairs at 12 affected sites, understood to be mainly in the north and west of the city.

According to reports, a vital fire safety measure was found to have not been installed correctly in some of the developments.

Problems were first discovered last year in both council and privately-owned new builds delivered by the housebuilder. Further investigations have uncovered issues in 728 properties in total.

However, the widespread presence of building errors, which differ at each development and are ‘low level’ according to the council, were not formally reported to the authority’s housing committee until last week.

A senior official said some tenants have been forced to move out while remedial works take place and Roberston had “responded well to everything we’ve asked of them”.

In a statement to Edinburgh Live, Robertson said it was “working closely with the council and its tenants to carry out repairs”.

A report before councillors said “construction defects” had been identified within the Edinburgh Living portfolio, the local authority’s mid-market housing initiative, however it contained no details on what defects were found.

Responding to further enquiries by the Local Democracy Reporting Service the council said they generally relate to roof and ventilation systems installed creating leaks, and firestopping installations, adding the later ‘has been prioritised during the repairs process’.

Critical for stopping the spread of fires in homes, fire-stopping installations are designed to seal openings and gaps in walls, floors, and ceilings. Proper firestopping is essential for compliance with building codes and standards, ensuring a safer environment in residential and commercial structures.

Jane Meagher, Edinburgh housing committee convener, said it was “very disappointing to find any defects in recently completed buildings”.

She said: “I’d like to thank our many tenants affected for their patience and cooperation. Over the last year we’ve been checking for any problems that may exist in their homes. This has been an extensive investigation and while the defects found are low risk, we’re keen to see them addressed fully.

“Making sure our tenants are safe, looked after, and fully informed is our priority.

“We’re working with the contractor to ensure that they are put right. We have made strong progress to date with repairs, and we’re keen to see all remaining works completed as promptly as possible.”

A spokesperson for Robertson Partnership Homes said: “Working with our customer City of Edinburgh Council, some defects were identified across developments within the Edinburgh Living Portfolio.

“As a responsible contractor, we are working closely with the council and its tenants to carry out repairs.”