Listing says duplex, county says single family with an apartment

Question

I'm looking at a place where the listing says duplex, two units, separate entrances. The county assessor page calls it a single family residence with an accessory apartment. When I asked, the agent said as long as there are two kitchens and two entrances the lender treats it as two units, so don't worry about the assessor record because that's just for taxes.

That doesn't sound right to me but I can't explain why. Is there an actual definition of a two-unit property, or is it just whatever the building physically has? And if it turns out the second unit was finished without permits, does that change the loan or just the price I should offer?

Rena Guide · Accepted Answer

There is a real definition, and it isn't kitchens. A two-unit property is one where the local zoning and building records recognize two separate dwelling units at that address. The paperwork that shows it is usually a certificate of occupancy, a permit history, or a zoning verification letter from the city. What zoning allows and what proof a city will issue varies by state and often by town, so you check with that specific building department rather than a general rule.

The assessor record isn't proof either way, but it's a hint that the second unit may never have been permitted. Assessors sometimes lag reality by years.

Where this bites is the appraisal. On a purchase, the appraiser decides how many legal units exist and writes it on the report. If the appraiser calls it a one-unit house with an accessory space, your lender underwrites it as a single family home, and the rent from the second unit usually can't be counted toward your income. Your whole reason for buying it goes away at that point.

The part people miss is insurance. Carriers ask how many units and whether the use is permitted. If a claim happens and the unit was never legal, the settlement conversation gets ugly.

So ask for the permit file before you get attached to the numbers. If the unit is unpermitted, the honest ways forward are a lower price and a plan to legalize it, and whether legalizing is even possible depends entirely on your local ordinance.

stephen_ok9 · Answer

One concrete thing to ask the lender: which appraisal form they're ordering. A single family gets a 1004. A two to four unit gets a 1025, the small residential income property report, and it has a rent schedule attached. If they order a 1004 on your "duplex" you already have your answer about how the file is being treated.

chriswalton8 · Answer

Water and sewer connections are worth pulling too. A lot of these basement conversions run off the original single service, and some cities won't sign off on a second legal unit without a second sewer lateral or at least an inspection. That's not a small line item if it comes up.

angela_burke · Answer

My guys walk into these all the time and the tells are consistent. One electrical panel with a subpanel jammed in a closet, no second meter, bedroom windows below grade with no egress. Cutting in a proper egress window well ran somewhere around $3,500 to $5,000 on the jobs I've seen quoted, and that's before anyone talks about the ceiling height the code wants.

dmitri_v6 · Answer

The document you want is a zoning verification letter, and not every jurisdiction issues them, which is its own answer. Tax records and title won't tell you unit count in any binding way. Some states also have legal nonconforming status, where a unit predates the current zoning and stays lawful, and the city may have a specific record type for that. Worth a call to a local land use attorney if the deal hinges on it, because the answer is statute-specific.

tonyv88 · Answer

Also, in some states an unpermitted unit affects what you can enforce in a lease. Ask a local attorney before you sign a tenant into it.

Listing says duplex, county says single family with an apartment

6 replies