Your ADU Builder Didn't Pay the Plumber. Now There's a Lien on Your House?

You paid in full. So how is a stranger's bill suddenly your problem?

Here's the part nobody walks you through when you sign the contract. The people who actually swing the hammers on your ADU — the plumber, the framer, the yard that dropped off the trusses — usually never signed a thing with you. They signed with your builder. You paid your builder. Your builder was supposed to pay them.

But if your builder pockets the money or folds before the checks clear, Florida law hands those unpaid workers a back door: they can come after the thing they improved. That's your house. Not the builder's bank account — your lot in Conway, Azalea Park, wherever the slab got poured. A long time ago the law decided the folks who did the labor shouldn't eat the loss when the middleman vanishes. So the loss rolls downhill to the one person with an asset worth chasing. You.

A lien doesn't send anyone to pound on your door. It just sits on your title like a bad smell — quiet until the day you try to sell or refinance, and all of a sudden the closing can't happen until it's cleared. In the worst version, the unpaid party can push to force a sale.

That 'junk mail' stamped NOTICE TO OWNER is the most important letter you'll get

Somewhere in the first few weeks of your build, a stiff, lawyerly letter shows up from a company you've never heard of. "Notice to Owner." Most people toss it. Don't.

In Florida, any sub or supplier who didn't sign a contract directly with you has to send that notice — before they start, or within 45 days of showing up — or they lose the right to lien you at all. Read that again. The letter that looks like a threat is actually the system drawing you a map: here is every outfit that could someday come after your property. Forty-five days is the whole window. A plumber who starts roughing in your ADU bathroom in March and never sends that notice has, by summer, quietly given up his claim on your house — whether he realizes it or not.

So those letters aren't the problem. They're the roster. Keep every single one. The names on them are exactly the people you want signatures from before your builder sees final payment.

How a homeowner ends up paying for the same bathtub twice

The double-payment trap is simple and brutal. You pay the builder for the plumbing. The builder doesn't pay the plumber. The plumber liens your house. Now you either pay the plumber directly or you can't sell — so you've paid for that bathtub once to your builder and again to the guy who installed it.

The fix isn't complicated. It's just a habit most homeowners don't know to build. Every time you hand your builder a payment, get a signed lien release from each sub and supplier on that Notice to Owner roster for the work the draw covers. Before the final check, get a Contractor's Final Payment Affidavit — a sworn statement listing everyone who's been paid and anyone who hasn't. Florida law lets you rely on that affidavit, and anyone left off it generally can't circle back and lien you later. No release, no affidavit, no final check. That's the whole discipline.

One more thing specific to building here. Before your first inspection, a Notice of Commencement gets recorded with the Orange County Comptroller and posted on the job site. It carries an expiration — pay your builder after that date lapses without renewing it, and Florida treats those as improper payments, the kind that can leave you exposed all over again. And an unpaid sub's claim can shadow your title for up to a year after it's recorded. The paperwork feels like a nuisance right up until it's the only thing standing between you and somebody else's unpaid bill.

The good news: you can stack the deck before the first shovel

Most of this risk comes from not knowing which questions to ask before you sign — who's really doing the work, who has to notice you, what you hold back until the releases are in hand. A homeowner putting a cottage behind the house in Winter Garden and one adding a mother-in-law suite out in unincorporated Orange County run into the exact same lien rules. Orange County's own Ready Set Orange program has at least made the permitting path for a small ADU clearer than it used to be.

But before permits and lien releases, there's a plainer question: does your lot even work for an ADU — the setbacks, the homestead rules, the room for a 500-to-700-square-foot cottage out back? That's what the ADU Fit Check is for. Answer a few questions about your property and you'll know where you stand before you ever sign a contract or cut a check. Start with the ADU Fit Check at /adu-fit-check/.

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