Underwriting Off-Market Deals When There Is No Listing

On-market deals come with a story. There's a listing sheet, a rent roll, a T-12, and a broker whose job is to package everything into a clean PDF. Off-market deals give you none of that. You get a seller, a property, and a lot of blanks you have to fill in yourself. That's actually where the margin lives—but only if you underwrite the gaps instead of guessing at them.

Here's how I approach a deal when there's no listing to anchor to.

Start With What You Can Verify Independently

Before you take a single number from the seller, build your own baseline from public and third-party data. You can usually confirm:

• Unit count and square footage from county records
• Tax assessment and current tax bill from the assessor's site
• Lot size, zoning, and permitted use from the parcel record
• Recent comparable sales and rents in the immediate area

This gives you a shell you can trust before the seller's story ever enters the picture. If the county says it's a 6-unit and the seller is calling it an 8-unit because someone illegally split two garages, you want to know that on day one—not in due diligence.

Rebuild the Income From the Ground Up

With no rent roll, you have to estimate gross income and then treat the seller's actual rents as either confirmation or a red flag.

Pull comparable rents for the unit types and finish level, then apply them conservatively. If the seller eventually shares leases, compare their in-place rents to your market estimate. Two outcomes matter:

1. In-place rents are below market. That's upside—but only if there's no reason they're stuck there (long-term tenants, rent control, deferred maintenance nobody will pay a premium for).
2. In-place rents are at or above market. Now I'm suspicious. Are those real signed leases, or aspirational numbers? Concessions burying the true rent?

Underwrite to your market rent, not the seller's pro forma. If the deal only works at rents nobody in the neighborhood is actually paying, it doesn't work. You can run these scenarios quickly in the analyzer so you're not stacking optimistic assumptions by hand.

Expenses Are Where Off-Market Deals Lie to You

Sellers who self-manage almost always understate expenses, usually by accident. They forget vacancy because they've had the same tenants for years. They don't pay themselves for management. They defer repairs and call the property "low maintenance."

Without a real T-12, I underwrite expenses from structure, not from the seller's memory:

• Taxes: Assume reassessment at your purchase price if your state reassesses on sale. This one line kills more off-market deals than anything else.
• Insurance: Get a real quote, not last year's premium. Rates have moved.
• Management: Budget it even if you'll self-manage. The deal has to survive being run like a business.
• Maintenance and capex: Older building, deferred condition, and a seller who "does everything himself" all point to higher reserves, not lower.
• Vacancy: Use a market figure, not the seller's zero.

When in doubt, use conservative percentages and let the calculators enforce discipline so you're not fudging line items to make the number work.

Price the Missing Information as Risk

The core difference between on- and off-market underwriting is that you're buying with incomplete data. You handle that two ways.

First, widen your assumptions to the pessimistic side wherever the data is thin. If you can't confirm the roof age, assume it needs replacing sooner. If you can't verify rents, use the low end of comps.

Second, build contingencies into your offer, not just your spreadsheet. An off-market price is a starting point, so tie your number to inspection findings, estoppel-confirmed rents, and clean access to actuals during due diligence. If the seller won't give you a window to verify, that's information too—it usually means the numbers won't survive verification.

Check the broader market reports to sanity-check whether your rent and expense assumptions line up with where the submarket is actually trending, not just this one block.

The Seller's Motivation Is Part of the Model

On-market, everyone's motivation is the same: get the highest price. Off-market, motivation varies wildly—tired landlord, estate sale, partnership dispute, looming capex bill they can't fund. That motivation tells you how much of your risk the price can absorb. A motivated seller lets you underwrite conservatively and still transact. An unmotivated one at a full number gives you no room for the unknowns you're taking on.

Concrete takeaway: Before your next off-market offer, build the entire underwriting from independent data first—county records, market comps, real insurance quotes—and only then let the seller's numbers in as confirmation. If the deal works on your rebuilt figures, you have a deal. If it only works on theirs, you have a listing sheet with no listing behind it.