House Floor Plans

I want my house floor plans, which was built in 1984. I do not know who built it.

Visit your city hall. Usually, the Department of Public Works has plans for your home folder. They were the ones who had to issue the original permit - the building permit, plumbing permit, electrical permit, and allow mechanics. They can also have your lot lines, etc.

go to your county office .... They have filed plans with the county before they built your house ...

Jump to the permit office of the Town Hall. Sometimes they have lost the records of past projects. But I think they should have plans for a house of 20 years. If you live in an urbanization of similar houses try the administrator's office or ask a neighborhood.
Good luck.