Just moved into my new construction home this past spring and am experiencing foundational issues with the concrete and block work, they company that built my home is called Homes In Partnership and they are aware and say they are helping but have taken no actions to make any remedy to my home and the problem is only worsening over time. The exterior cracking in concrete was the first symptom but every day we find more cracking, and it is ripping into the drywall, cabinets, window and door frames, and the grout on the floor and bathrooms. The stem wall was broken at beginning of construction and builders were made aware; however, we believe nothing proper was ever done to fix the stem wall and that it is leading to the new home split apart at the seams.
It would be great if you indicated at least the city. This would bring you closer to your final goal. I'm sorry that you are faced with this situation. I'm always on the lookout for structural failures when I'm looking for a new home for a mortgage. But I also understand that I can point out flaws and get a significant discount. As an example, I can give my second home (Toronto). There were problems with the waterproofing of the basement. I had to call wet basement toronto - https://www.draincom.ca/basement-waterproofing-toronto/ These guys fixed the defect but I realized that the amount was not enough for me to sue the previous owner. Your case screams to review every letter of the building contract with your lawyer.