The land certificate can be inquired by the county land department, and the planning permit can be inquired by the planning department. However, there must be relevant procedures and supporting materials, which will basically not be checked for you.
You can consult the local town government land and urban construction institute first, because their suggestions are the main way to publish documents through them.
The house is nothing more than an appendage on the land, and what is really valuable in the countryside is the homestead.
I don't know why you want to check. If there is a dispute, the family should focus on harmony, and the family is different from outsiders. I hope you are harmonious. Don't blame me for talking too much.