Okay I'll be the contrary one....sorry to say, I've heard more inaccurate advice from attorneys than I care to. They charge money for an often invalid response to your question.
Married filing separately does not address the laws in California that you need addressed so I'm not sure that a CPA can provide much guidance there except to say you've file in a manner that is legal. Married, filing separately, still requires, under federal law, that both parties list the full income for the marriage and the full expenses. Call Ed Cook at (916) 705-4958. He addressed this same question with me, as my CPA. It is often assumed that you can keep all assets separate that way but it's not true.
Still the two bigger questions are the way California views inherited property, and how CA views ownership in property acquired sometime during the marriage. I'd first ask an escrow officer. They deal with this issue every day. If you are still married, I assume you'll need the married partner to sign off on anything that you do, as a safeguard, whether they legally have any rights to the inherited property or not. THEN I'd go confirm with an attorney to see if any considerations were missing in your analysis. I know that you will need to prove that, despite inheriting it, that you used no common funds to maintain the property. If so, he might be able to make a claim that it is now community property, but would he?
The more prepared you are, the better chance that your objective will be attained without courts, etc. California throws lots of roadblocks that are different than federal views. Hopefully, your soon-to-be ex-husband will just cooperate if it's required that he sign off on it and he is presented the facts.
As a realtor, we aren't experts on the answers, but we sure can help you determine the questions and who might best help you. Keep asking.