Sub-to on a farmhouse with 11 acres, and the lien covers all of it

Two strategies stacked on each other, and each one has a way of failing that the other one can't fix. If the split is the money, buy it conventionally and price the rate in. If the rate is the money, buy the house and leave the acres alone.

Let me put numbers on @verity's point because I think they favor her conclusion.

House at 245,000 with a 211,600 loan at 3.75% is roughly 33,400 of equity, and she wants 34,000. So you are paying full equity value for the house and getting the eleven acres for the cost of the rate advantage. The rate advantage on a 26 year 211,600 balance versus, say, seven and a quarter on the same amount is around 700 a month in payment terms. Real money.

Now the split. Three lots at 70,000 is 210,000 gross. Survey, engineering, road and utility work, county fees, and holding through approval on a corridor like that is not a small number, and you haven't given one. If it's 60,000 to 90,000 all in and it takes 18 months, the split is worth maybe 120,000 net, and it only exists if the partial release exists.

So the question is whether you'd pay 34,000 for a 700 a month payment advantage on a house you have to manage. That's a defensible yes on its own. The lot upside is an option with an unknown strike price.

The mechanism you're up against is straightforward and the workarounds are mostly not.

A residential mortgage or deed of trust encumbers the described parcel as a whole. Splitting the land into new legal lots does not split the lien. Each new lot remains subject to the entire debt until the lienholder releases it, and a release is a document the lender signs. There is no version of this where you convey clear title to a lot buyer without the lender participating. A title company will not insure around it.

That participation is the problem you named. The release request puts a current owner of record in front of the servicer, and the current owner will be you. Whether that triggers action on the due-on-sale clause is a judgment call about that particular servicer, and nobody here can tell you the answer with confidence. Assume the risk is materially higher than the background rate for a loan that is simply paid on time every month.

Two other things your post assumes and should verify in writing rather than by phone. Subdivision authority and lot standards vary by state and by county, and a single phone call from the zoning counter is not an approval. Get the applicable ordinance sections and a written determination if the county issues them. Separately, how a deed transfer is recorded, what transfer tax applies, and what the seller must disclose all differ by state, so this needs a real estate attorney licensed where the property sits.

On your closing question: the rate is a genuine asset with a measurable monthly value. The split is a separate business that requires lender cooperation you don't have. Price them separately and see whether the deal survives on the first one alone.

62,000 to 78,000 for finished lots. Were those finished or were they raw splits sold to builders? The gap between those two numbers is usually most of the profit, and around growth corridors people quote the finished number and buy at the raw one.

Nobody's mentioned the escrow account. Taxes at 262 a month means an escrowed 3,144 a year, and the second you split lots the county reassesses and issues new parcel numbers. Your escrow analysis goes haywire, the servicer sends a shortage notice to her address in her name, and now she's fielding mail about a property she doesn't own with parcel numbers she's never seen. I've had smaller things than that turn a cooperative seller into a nervous one.

Genuinely asking, why would the seller sign the deed over before knowing the split works? Feels like she's carrying every risk in the deal.

@rigging she's carrying the loan risk. parcel is carrying the split risk and paying 34,000 for the privilege. Those aren't the same risk and I think that's why the deal can exist at all.

parcel, the question I'd want answered before the release question: if you never split a single lot, do you want this house at this price with 11 acres of taxes attached? If the answer is no, everything after that is a story you're telling yourself about a document a servicer hasn't agreed to sign.

1970s farmhouse on well and septic, rented while you wait 18 months on a county approval. Who's managing that, and have you priced it? @thicket's escrow point and that one land in the same place, which is your seller's phone.