Representatives of a downtown Calgary condo complex have filed a lawsuit against two construction companies after structural damage was caused that could cost owners more than $4.5 million to repair.

The damage sustained to Rocky Mountain Court, located at 221 6th Avenue S.E., allegedly occurred last summer while crews with Durwest Construction Systems and Williams Engineering Canada Inc. were performing parkade renovations.

City of Calgary investigators then determined in July that businesses on the main floor of the complex would be forced to vacate until repairs to the structure were undertaken.

Condo board President Adam Zakreski declined requests for an interview on the lawsuit Monday.

“We’re going to be meeting with their lawyers Thursday to go over details,” he wrote in an email. “As we are right in the midst of negotiations I am not comfortable commenting at this time.”

Representatives with both accused companies were not available for comment Monday afternoon.

Gord Anderson owns a condo in Rocky Mountain Court and said he and others face foreclosure over the high costs of repairs.

“I am scrambling . . . I actually have a claim into my own condo insurance,” he said. “There seems to be a special clause that may cover this. If not, I owe my first payment — $18,000 — on Nov. 1 and I don’t have the money.”

Anderson said he may owe up to $45,000 by April.

“I was lucky to keep my shirt through the downward slide in the economy,” he said.

“I was just finally seeing a little bit of light, breathing room . . . now I’m in the position of if this insurance doesn’t come through, I don’t know what to do. I am at a complete loss.”