A listing says the home is "Mills Act," and a buyer's first reaction is almost always about the assessment. That is the least useful thing to focus on first.
The useful question is different. What am I agreeing to maintain, for how long, subject to whose review, and what happens if I do not?
Because a preservation agreement of this kind is recorded against the property. You are not buying a house that happens to have a nice tax situation. You are buying a house plus a contract, and the contract came with the deed.
What transfers, in concept
Three things, generally, and all three matter.
The obligation transfers. The duty to preserve and maintain the property under the agreement does not end at closing. It runs with the land for the remaining term. Whatever the previous owner promised, you are now the one promising it.
The term transfers. Agreements of this type typically run for a defined period with defined renewal behavior. You inherit whatever is left, and whatever renewal or non renewal state the agreement is currently in. That state is a fact you should establish before you remove contingencies, not something to discover later.
The performance history transfers with it, informally. If the seller was behind on the plan, you are inheriting a house with deferred work and a local agency that may already know about it. That is not a disaster. It is a negotiating fact.
What does NOT transfer automatically is the assessment outcome. How the property is assessed after a change in ownership is a matter of state law and county practice, and it is precisely the kind of specific this site will not guess at. Ask the County Assessor and the City, and ask a tax professional what it means for you.
The documents to actually read
Get them. Do not accept a summary.
- The recorded agreement itself. Read the obligations, the term, the renewal mechanics, and the sections describing what happens on breach or cancellation.
- The maintenance or preservation plan attached to it. This is the list of work the previous owner committed to. Compare it to what is visibly done.
- Any inspection or compliance correspondence from the City. If the agency has documented concerns, you want to know before you own them.
- The permit history for the property. Unpermitted alterations to a property under a preservation agreement are a different order of problem than unpermitted alterations to an ordinary house.
Then have a real conversation with the City of Claremont about that specific parcel: what status it carries, what the agreement requires, what the review process looks like for the work you are planning, and what the current compliance posture is. Every answer in this paragraph must come from them.
Match the contract to your actual plans
This is where buyers get themselves into trouble, and it is entirely avoidable.
Walk the house with your real intentions in hand. Not your polite intentions. If what you want is a great room, a wall of glass at the back, a second story, and modern windows throughout, then a preservation agreement is going to be a source of friction for years. Say so out loud during escrow, while you can still change your mind.
If what you want is the house as it is, repaired properly, then the agreement is mostly formalizing your existing intentions. Read how additions to historic homes are done well before you decide which camp you are in, because the middle ground is wider than people assume. Plenty of thoughtful expansion is possible; it just happens at the back, in scale, and after review.
Inspect harder, not less
An agreement is a commitment to maintain. Buying into that commitment without knowing the building's condition is how a buyer ends up with a five year obligation and a failing roof in year one.
Use inspectors who have handled old houses. Look specifically at the elements a preservation plan cares about: roof and flashing, drainage, foundation and any raised floor structure, original windows, exterior wood, chimney. The cluster piece on what old Claremont houses hide covers the ground.
Two categories deserve their own sentence. LEAD PAINT and ASBESTOS are recurring realities in older housing stock and are governed by federal and state disclosure and handling rules. Treat both as matters for a licensed professional and for the required disclosures, not as internet research projects.
Insurance and lending
Ask your lender early whether anything about the recorded agreement affects underwriting. Usually the answer is uneventful, but early is free and late is not.
Insurance deserves more attention than most buyers give it, because replacement of historic fabric and ordinary replacement cost are not the same idea. That gap is the subject of the coverage gap on historic homes, and it is worth reading before you bind a policy.
What a good buyer does, in order
Ask for the recorded agreement and its plan in the first days of escrow. Read them yourself. Call the City about the parcel. Get an inspection from someone who understands old construction. Ask a tax professional about the assessment question rather than assuming continuity. Then decide whether the house and the contract, together, are the thing you want.
Done that way, buying a home under a preservation agreement is not risky. It is simply a purchase with an extra document in it, and the document rewards reading.
The broader picture is at the historic homes hub, and the owner's side of the same arrangement is covered in applying for a contract in the first place. Anthony Grynchal has been licensed in California since November 2009.
Frequently asked questions
Do I inherit the seller's preservation obligations?
Generally yes. An agreement of this kind is recorded against the property and runs with the land for its remaining term, so the buyer takes on the maintenance and preservation duties. Confirm the specific terms with the City of Claremont.
Does the assessment treatment continue after I buy?
That depends on state law and county practice and should not be assumed. Ask the County Assessor and a tax professional about your specific purchase rather than relying on the seller's current situation.
What documents should I request during escrow?
The recorded agreement, the attached maintenance or preservation plan, any compliance correspondence from the City, and the property's permit history. Read them yourself rather than accepting a summary.
Can I remodel a home that is under a preservation agreement?
Interior work and appropriate repairs are often straightforward, but exterior changes typically go through review. If your plans involve major changes to how the house reads from the street, discuss them with the City before removing contingencies.

Written by
Anthony Grynchal
Anthony Grynchal is a California real estate professional with eXp Realty, licensed since November 2009 (California DRE# 01873626), and the Designated Local Expert™ for Claremont — where he has lived for more than 33 years.
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