Work will now restart on the project in Fraserburgh after Dundee-based Murifield (Contracts) went into administration.
Among those contracts was the £5.1m 30-home Barrasgate development.
Robertson Construction submitted the best tender and discussions are underway to develop a timeframe for completion.
In addition, the council has appointed Bancon Homes to finish a housing project at Martin's Brae in Inverurie, with worked already restarted on the site.
Muirfield was also carrying out out upgrades to council homes including windows, doors, bathrooms and kitchens when administrators were appointed.
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Following a tender process, Robertson will pick up stalled improvement works on kitchens and windows across the area worth over £2.3m.
Mears Group will also carry out upgrades to bathrooms and doors worth over £2.3m.
Installation of efficient windows and doors will now be completed by R. Davidson at a cost of just under £250,000.
All of the stock improvements will be complete by next spring.
The council's Head of Property, Allan Whyte, said: "The process of finding alternative companies to complete the developments and upgrades to homes started almost immediately when we became aware of the issues.
"We know the affordable housing developments at Barrasgate and at Martin’s Brae were eagerly anticipated and although the circumstances were out of our control, we have made a real effort to resume work as soon as possible.
"We made an early commitment to ensure none of our residents would be unduly affected by the Muirfield administration and have worked hard to ensure all of the planned work will now go ahead."
(LM/CD)
