Hi Ray here a new expert.
Your mother can pursue a claim for this material nondisclosure under the sales contract.
She would need a local lawyer to send demand letters to the seller, the realtor, and the inspector.The realtor and inspector have errors and omission type coverage.
Once hey get the demand letters you may get partial offers of settlement from each of the parties.You can then sue the rest for any remaining damages
.Often this is resolved at the demand letter stage.
She has great facts since this was not disclosed during closing on any of the disclosure forms or by the inspector and his report.
You can locate a real estate
litigation lawyer here.
She has four years to sue for breach of sales contract.
The lawyer would seek legal fess and costs here as part of settlement.
She appears to have great facts to seek such a recovery.
I appreciate the chance to help you today.Please let me know if you have more follow up.Thanks again.