Multnomah County, OR Cap Rates by Neighborhood

County-Wide Gross Yield: The Number That Misleads

At a $511,411 median home price and $1,688 median monthly rent, Multnomah County posts a 3.96% gross yield. That figure is the floor of what you can buy in this market, not a representative target. The median smooths together Pearl District condos priced well above $500K, transitional east-side single-family lots with ADU potential, and stabilized small multifamily assets at varying vacancy assumptions. Treating 3.96% as a market cap rate produces underwriting that is wrong for nearly every deal in the county.

The spread between segments is where the analysis lives. A Pearl District two-bedroom apartment renting at $3,000 per month anchors the high-rent end. A county-wide median single-family home at $511,411 at the same $1,688 rent sits at the low end. The right gross yield for your deal depends almost entirely on which neighborhood and which asset class you are buying.

Asset Segment Breakdown: Gross Yields by Property Type

Stabilized Single-Family and Small Multifamily (County Median)

At $511,411 and $1,688 per month, gross yield holds at 3.96%, or about $20,257 in annual gross rent. Before any expenses, this is already a thin spread for a market with an 8.8% multifamily vacancy rate. Applying a vacancy adjustment of 8.8% cuts gross effective rent to about $18,474 annually, pushing effective gross yield to 3.61%.

That is before property taxes. Multnomah County's effective property tax rate runs 1.07%–1.11% of market value. On a $511,411 acquisition, that means $5,472–$5,677 in annual property taxes. Netting taxes out of the 3.61% effective yield sheds another 107–111 basis points, leaving a pre-insurance, pre-management gross-net yield of roughly 2.5%–2.6%.

This is not a cash-flow-first market at the median price point. Oregon's Measure 50 caps assessed value growth at 3% annually, which provides cost predictability on existing holdings, but it does nothing to improve the entry-level yield math on new acquisitions.

Pearl District (High-Rent, Low-Yield)

Pearl District two-bedroom apartments average $3,000 per month in rent. Comparable ownership units in the Pearl sit well above the county median. Assuming an acquisition price above $511,411 with $3,000 in monthly rent, the gross yield still likely underperforms 4.0%. Add HOA fees typical of condo product, and net operating yields compress below 3.0% in a best-case scenario. The Pearl is not a cash-flow play; investors who bought there bought an appreciation thesis that has now stalled with county-wide price appreciation at negative 0.5% year-over-year.

Condo Segment (Distressed Entry, Uncertain Recovery)

Median condo prices fell 7.6% year-over-year to $368,700 as of May 2026. At $368,700 and a conservative monthly rent of $1,600–$1,800 for a typical unit, gross yields land in the range of 5.2%–5.9%. That is the best headline number in the county by asset class, and it reflects real pricing distress from HOA fee inflation and financing friction, not a sudden improvement in the income stream.

The catch: elevated HOA costs reduce net yield directly, non-warrantable financing raises debt costs, and buyer caution implies an extended horizon before price recovery. Investors willing to pay cash or access non-warrantable loan products and hold through the cycle get the best entry yields the county offers, but with an uncertain exit timeline.

ADU and Infill Multifamily (Value-Add Path)

Portland's Residential Infill Project stack (RIP1 and RIP2) allows two ADUs per single-family lot with no parking requirement. The System Development Charge waiver eliminates SDCs in exchange for a 10-year covenant against short-term rentals, saving tens of thousands of dollars per ADU project. Oregon SB 1537 and the Model Code (phased through 2027) further allow duplexes, triplexes, fourplexes, and cottage clusters as-of-right on standard residential lots.

This is where yield creation happens in Multnomah County. A $511,411 single-family acquisition producing $1,688 per month at 3.96% gross becomes a different underwriting story when a rear ADU producing $1,400–$1,600 per month is added at incremental construction cost rather than a second land acquisition. Two-unit gross rent of $3,088–$3,288 per month on the same land basis restructures the deal toward 7%–8% gross yields on total invested capital, depending on build cost.

The SDC waiver and code streamlining through Chapter 33.205 reduce permitting friction. Investors without a 10-year hold horizon should model STR restrictions as a real constraint, since the waiver covenant is binding.

Neighborhood Comparison

Flood Insurance Adjustment

About 34,364 county properties, or 12.6% of all parcels, carry flood exposure over a 30-year horizon. FEMA maps are acknowledged as out of date, and a planned Letter of Map Revision for Sauvie Island signals that reclassifications are coming. For parcels near the Willamette or Columbia Rivers, mandatory flood insurance purchase post-reclassification adds a cost line that does not appear in current underwriting.

On a $511,411 property reclassified into a high-risk FEMA zone, flood insurance premiums in Oregon typically run $1,500–$3,000 annually depending on elevation, structure type, and coverage amount. That range represents another 30–59 basis points of yield erosion on gross rent, on top of the property tax hit. Verify FEMA zone status at the parcel level before closing, and confirm whether a LOMR is pending that could affect the specific address.

Cap Rate Compression vs. Decompression

Prices fell 0.5% year-over-year while average asking rents rose 3.3% in 2024. That combination produces mild cap rate decompression: income grows slightly faster than prices, which should widen yields modestly. The dynamic is offset, however, by rising vacancy. At 8.8% multifamily vacancy, effective rents on new leases reflect concessions and longer absorption timelines, making the 3.3% average rent increase less useful than it appears.

Supply pressure continues: 6,922 new apartment units are projected to enter the market in 2025–2026, expanding inventory by 4.3% from 2024 levels. This pipeline will test asking rents through at least mid-2026 and likely push vacancies higher before supply normalizes. Moody's projects 2.8% effective rent growth in 2025 and 3.8% over the next five years, which is above the national average but reflects a recovery from a period of concession-driven softness, not a return to 2021–2022 conditions.

Cap Rate Outlook

The county-wide gross yield of 3.96% likely represents a floor that improves modestly as price appreciation remains near flat and rents edge upward. The 8.8% vacancy rate and the ~7,000-unit supply wave are the primary bearish counterweights over the next 12–18 months. Investors underwriting stabilized multifamily acquisitions at current prices should assume vacancy above 8% and rent growth below 3% for the near term.

The value-add infill thesis is the highest-conviction path in this market. Oregon's layered zoning reform stack (RIP1, RIP2, SB 1537, the Model Code) creates as-of-right densification opportunities that convert thin 4% gross yields on single-family land into 7%–8% yields on total invested capital. The SDC waiver accelerates the economics. The 10-year STR covenant is the constraint to price carefully.

The condo segment offers the county's best headline entry yields at 5.2%–5.9% gross on a $368,700 median price, but net yields after HOA costs and elevated debt costs narrow the advantage. Distressed condo buyers with cash and patience have the best risk-adjusted entry point in the near term.

Employment contraction is the variable to watch. The county shed about 5,000 jobs from June 2024 to June 2025. If that trend reverses toward growth in tech and healthcare, rental demand firms and the long-run rent growth case strengthens. If contraction continues, vacancy rises above 8.8% and asking rents face downward pressure that no zoning reform can offset.

Model your specific deal with our investment property calculator to stress-test vacancy, tax burden, insurance, and ADU construction costs against the yield thresholds your return requirements demand.