A Christchurch earthquake repair expert believes the number of shoddy foundation repairs could be in the thousands.
On Monday, 170 homeowners will meet with lawyer Peter Woods to help them find solutions to the failed foundation repairs.
Shoddy underground repairs are visible throughout Denise Sammons' two-bedroom South Shore house in the city's eastern suburbs.
The problem is underneath the house and out of sight. Failed foundation repairs have been undertaken twice, and are still not fixed.
It's an exhausting seven-year battle that's taking its toll on Ms Sammons.
"In the end it ends up being your private fight because your friends get sick of it," she says.
Bevan Craig specialises in assessing repaired foundations. He says Ms Sammons isn't alone; there are four others on her street with the same problem and could number in the thousands.
"About 85 percent of my business now is EQC repairs and out of those inspections that I'm doing I'm running about an 80 percent failure rate."
"There will be a lot of people out there that don't know they have a problem, or they may have just turned a blind eye to it," says lawyer Peter Woods.
"They won't know until they come to sell the house and someone will say your foundations are ruined and your house isn't worth much."
EQC says it's managing more than 3700 call-back repairs - more than 1000 of them relate to foundations.
Newshub.