看这文章分析，好像也可能很严重，而且最好不要单独一家处理。
- Townhome foundation problems should be addressed simultaneously – When it comes to townhomes, addressing foundation problems individually may not be the best approach. First, if one unit is having foundation problems, it’s only a matter of time before the neighboring units develop foundation issues as well. Second, if you fix only a portion of the foundation, the problems left unaddressed will continue to evolve. Not only will these problems become worse over time; they may affect other elements, including load-bearing components, too. While it’s possible to repair individual sections of a townhome foundation, fixing all the foundation problems at the same time will result in a more complete and durable repair. Once fixed, the foundation will remain level and stable for many years to come, preventing damage to the neighboring units that share the same footprint.
https://www.crackedslab.com/blog/townhome-foundation-repair-top-things-to-consider
