Appraiser gave my finished ADU $65k of contributory value on a $190k build

Question

Detached 780 sq ft, permitted, separately metered, own address, currently leased at $1,850. All in around $190,000 including the site work. Went for a cash-out refinance and the appraisal came back with the ADU contributing about $65,000 to value. The appraiser's note said there were no closed sales of single family properties with accessory units within a mile in the last twelve months, so she used a paired sales analysis against two properties with finished basements and a large detached shop.

That's a $125,000 gap between cost and recognized value, and it's blocking the cash out I was going to use for the next one. The unit produces $22,200 a year gross. Under an income approach at any reasonable cap rate the thing is worth two to three times what she gave it.

What actually works here? Reconsideration of value with better comps, a different loan product that permits an income approach, or do I just accept that the equity isn't coming out for a few years until the comps exist?

Rena Expert · Accepted Answer

Contributory value on a single family appraisal is a market extraction, not a cost figure and not a capitalized income figure. On the standard form used for a one unit owner-occupied property, the sales comparison approach carries the weight and the appraiser has to support any adjustment with paired sales. If nothing in your market has traded with an accessory unit, she has thin support for a large adjustment, and $65,000 against basement and shop pairings is a defensible if pessimistic read of no data.

So the three routes, ordered by how often they work.

A reconsideration of value is worth filing if you can hand the lender actual closed sales, not listings, of properties with legal accessory units, and you can go outside her search radius and past twelve months if you explain why the market is comparable. Two or three good pairings sometimes move a number by real money. Your rent roll alone won't, because the form isn't asking for it.

Changing the appraisal problem is the bigger lever. Some lenders will treat a property with a legal second unit as a two unit property, which puts you on a different form where rent has an actual place to live, though whether your property qualifies depends on how the unit is classified on the municipal record and on that specific lender's guidelines. Ask a lender before you order another appraisal, not after. And portfolio and debt service coverage lenders underwrite off the income directly, usually at a higher rate.

The assumption I'd check in your own math is that the income approach number is the market number. Buyers in a single family neighborhood mostly aren't paying a cap rate for a backyard cottage. Some of that $125,000 gap may simply be real, and paying $190,000 to build $130,000 of value is a normal ADU outcome that the cash flow still justifies over a hold.

What can bite you: ordering a second appraisal, getting a lower number, and having that follow you at that lender.

raj_mehta14 · Answer

I don't follow the form part. Is the appraiser choosing which form to use or is the lender telling her? If it's the lender telling her, isn't the whole outcome decided before she ever drives out?

diane_kowalski · Answer

vellum, the lender orders the assignment and the property type comes with the order. The appraiser can push back if what she finds on site doesn't match, which is how people end up with a surprise two unit or a surprise illegal unit on the report.

laurenkim53 · Answer

Try this in a rural county and there are no paired sales at any radius. I looked at a place with a permitted second cottage and the lender's own appraiser said outright she'd have to go 40 miles for anything comparable and the review desk would likely cut the adjustment anyway. Ember at least has basements to argue with.

hannah_west29 · Answer

Run the deal without the cash out and see if it still works, because that tells you whether this is a problem or an inconvenience. $22,200 gross on $190,000 of cost is 11.7 percent before anything. Take out taxes on the new improvement, insurance, vacancy and a maintenance reserve and you're maybe $14,500 net. Against $190,000 that's 7.6 percent on cost with no debt on the unit itself. That's a fine asset. It's just an asset you can't refinance yet.

megan_doyle15 · Answer

Does the tenant's lease matter to the appraiser at all? I assumed a signed lease at $1,850 would be evidence of something.

dmitri_v6 · Answer

rigging, on a two unit form there's a rent schedule addendum where market rent gets stated. On the one unit form the lease is background. Ember, one thing I'd read before filing anything is the appraisal itself, the whole thing, including whether she measured the ADU as gross living area or listed it as an outbuilding. Which line she put the square footage on changes what argument you can even make.

jessreyes12 · Answer

Naive question, if the county record shows one dwelling unit and the ADU has its own address and meter, who decides which it is? That mismatch sounds like the actual thing blocking him.

nataliehsu · Answer

compass, the municipal record and the certificate of occupancy decide it for the lender's purposes, and separate metering is supporting evidence rather than the deciding fact.

jordan_ellis2 · Answer

So the takeaway I'm getting is that building an ADU to pull equity back out is a much weaker plan than building one for the rent, at least until enough of these sell in a given neighborhood. That reorders my whole list, because I had two properties on it specifically for the equity play.

Appraiser gave my finished ADU $65k of contributory value on a $190k build

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