Multifamily is the property type most new commercial investors gravitate toward first, largely because everyone understands what an apartment is in a way that's less intuitive for, say, a flex-industrial building. That familiarity is useful, but it also means multifamily deals get bid competitively, and the difference between a good purchase and a mediocre one usually comes down to the rent roll and the deferred maintenance list, not the neighborhood alone.
Class and Vintage Matter More Than the Address
A 1970s-built fourplex in Gresham and a newly constructed twelve-unit building in Hillsboro can sit a few miles apart and require entirely different underwriting. Older buildings often carry deferred capital needs, roof age, plumbing material, panel capacity, that don't show up in a trailing income statement but affect near-term cash flow once addressed. Newer construction trades at a premium but generally needs less near-term capital.
Reading a Rent Roll Honestly
In-place rents that sit well below current market rate are often marketed as upside, but converting that gap into actual income requires unit turnover, which takes time and sometimes capital for unit renovation between tenants. A rent roll showing five long-term tenants at below-market rent is a different underwriting problem than one showing recent turnover already at market rate, even if the current net operating income looks similar on paper.
Lease expiration timing across the building also matters, since a roll with every lease renewing in the same month creates more turnover risk concentrated in a short window than one staggered across the year.
Expense Categories Worth Double-Checking
Property tax reassessment on sale is one of the most commonly underestimated expense changes buyers miss when underwriting off a seller's trailing financials, since a sale often triggers a new assessed value that raises the tax line above what the seller was paying. Insurance premiums in the Pacific Northwest have also moved meaningfully in recent years, so a quote based on current market conditions, not the seller's existing policy, gives a more reliable number.
Financing Multifamily at Different Sizes
Smaller multifamily, generally two to four units, is typically financed with residential-style loan products even when purchased for investment, while five units and above moves into commercial multifamily financing with different underwriting, often including agency loan programs. That distinction affects both the buyer pool competing for a given listing and the loan terms available.
Local Supply Trends Worth Tracking
New multifamily permitting activity has been uneven across the Portland metro over recent years, with some suburban submarkets like Hillsboro and Wilsonville absorbing more new construction than close-in Portland neighborhoods. A buyer evaluating a specific building should look at what's currently permitted or under construction within a few miles, since new supply delivering in the next twelve to twenty-four months can pressure rents on an existing building even if that building's current occupancy and rent roll look strong today.
Exiting One Multifamily Property Through a 1031 Exchange
An owner selling a management-intensive small multifamily building has several 1031 paths: a larger, more professionally managed multifamily asset, a different property type entirely such as industrial or net lease retail, or a DST allocation for a fully passive structure. The right path depends less on the property type label and more on how much ongoing management involvement the seller actually wants going forward. Reviewing local supply pipeline data alongside the replacement property's own rent roll gives a fuller picture than the trailing financials alone.
Common 1031 Exchange Questions
How many units does a property need before it's considered commercial multifamily financing
Generally five units or more moves a property into commercial multifamily loan underwriting, while two to four units is typically financed with residential-style investment property loans, even though both are investment real estate.
Why do multifamily property taxes sometimes jump after a sale
Many jurisdictions reassess property value at the time of sale, which can raise the assessed value, and therefore the tax bill, above what the seller had been paying under an older assessment.
Is below-market rent in a rent roll a reliable source of extra returns
It represents potential upside, but realizing it requires unit turnover and often capital for renovations, which takes time. Treat below-market rent as a multi-year opportunity, not an immediate boost to income.
Can I 1031 exchange a small multifamily property into a larger one
Yes, multifamily-to-multifamily exchanges are common. The replacement property needs to be held for investment and priced high enough, accounting for any new debt, to avoid triggering taxable boot.
What's the main tradeoff between staying in multifamily and moving to a DST after selling
Staying in multifamily keeps more control and typically higher potential returns but with continued management responsibility. A DST removes that responsibility but comes with illiquidity, fees, and accredited-investor requirements.
