Condo owners in a downtown Calgary highrise have launched a lawsuit over a troubled parkade renovation.

City officials temporarily ordered people out of the lower levels of Rocky Mountain Court in July after an inspection of the second level of the parkade found its integrity was compromised during renovations.

The 29-storey building on Sixth Avenue S.E. has businesses on the main floor and condos above.

Condo owners, who pitched in more than $3 million on further repairs, are now suing Durwest Construction Systems and Williams Engineering Canada Inc. In statements of defence, both companies say they did nothing wrong, and that the other made mistakes.

The owners of about eight condemned family businesses on the main floor have launched a separate suit against the condo board who hired the companies.

"The anger inside of me is definitely high," said Reena Vadan, who owns a Mediterranean restaurant that has been closed since July. "It's time for people to step up and take responsibility for what they have done to us."

The city launched an investigation into Rocky Mountain Court after a complaint from a concerned citizen. An engineer eventually declared the elevator, lobby and exit corridor safe, which allowed residents to remain in their condos, but businesses on the main floor of the building, including a barber shop, several restaurants and a convenience store, remained close.