A 1978 covenant that never says ADU but kills it anyway
I read the CC&Rs on a lot before my partner made an offer, which is apparently unusual. Recorded 1978, subdivision of about 90 homes, and there's a clause prohibiting any structure "used or designed for use as a separate dwelling" other than the main residence. Written 45 years before the state allowed ADUs on lots like this one.
So now you've got a state statute that permits the unit and a private covenant that forbids it. Whether the statute overrides the recorded covenant depends on the state and on the exact wording of both, and that's a question for a real estate attorney licensed there, which is what we did. Ours read the file and gave us an opinion with a lot of hedging in it, which is the correct amount of hedging.
The practical part was funnier. I tried to find the HOA. No website, no management company, no filings for years. County had a registered agent from 1994 who'd died. I finally reached a man in his eighties who said he'd been the entire board since 2006 and that dues stopped being collected around then. He told me two houses on the street already have basement apartments and he'd been in one for a card game.
An unenforced covenant is still a recorded covenant. It shows up on the title commitment and a future buyer's lender will read it. We bought anyway with the attorney letter in the file, but I keep thinking about the day some new owner with energy decides to revive that board.