A 180-unit apartment complex along the Tualatin River just changed hands for $50.1 million, roughly $20 million less than what its previous owner paid for it four years ago. Bridge Investment Group closed on River Ridge, a 14-building community at 17865 SW Pacific Highway in Tualatin, buying it from Security Properties and its joint venture partner Oaktree Capital Management.
The sale price marks a steep drop from the $70 million Security Properties and Oaktree paid for the property in June 2022, according to Multifamily Housing News, which first reported the deal. That earlier purchase, detailed by REBusinessOnline, was an off-market transaction with original developer Mountain West Investment Corp., which built the 180-unit property in two phases between 2015 and 2017 across a nine-acre site along the river.
Despite the lower resale price, Security Properties Chief Investment Officer Mark Bates said the numbers reflect market conditions rather than how the property performed under his firm's ownership. River Ridge posted healthy rent growth, steady occupancy, and solid operations throughout the four-year hold, Bates said, with in-place rents climbing more than 20 percent during that span. He characterized the roughly $20 million valuation gap as a function of the broader interest-rate reset and cap-rate expansion that has hit multi-family real estate industry-wide, not a sign of operational weakness at River Ridge itself.
A Cooling But Recovering Portland Investment Market
The sale lands amid a choppy stretch for Portland-area apartment investment. Average multi-family price per unit in the Portland metro softened 5 percent quarter over quarter and 10.6 percent annually, coming in at $181,435 between April and June per a Colliers report cited by the same outlet. Overall transaction volume in the metro totaled $338.9 million in the second quarter, up 7 percent from the prior comparable period but still down 29 percent year over year.
Even so, River Ridge itself commanded $278,333 per unit, a figure that surpassed the previous quarter's average by more than 50 percent, suggesting institutional capital has begun returning to Portland even as broader pricing metrics remain soft. Bates offered a simple explanation for why a single asset can buck a cooling metro-wide trend: real estate is a local business, he said, and Portland has been one of the best-performing metros in Security Properties' broader portfolio. The firm still owns 10 communities and more than 2,700 units across the Portland area even after this sale.
Portland's rental fundamentals have also been shifting in landlords' favor, with concessions burning off market-wide and positive trade-outs showing up on both new leases and renewals. Part of that tightening traces back to a supply glut that followed a rush of building permits ahead of the city's 2017 inclusionary zoning implementation, which Portland has largely absorbed in the years since. That 2017 mandate, which required 20 percent affordable units in new buildings of 20 or more units, pushed many developers to shrink project sizes or shift multi-family construction to suburban markets like Tualatin altogether, according to the Rental Housing Journal.
Why River Ridge, and Why Now
River Ridge sits about 13 miles southwest of downtown Portland, near the city's southern industrial corridor, in a suburb that has become a transit and employment junction of its own. Tualatin sits roughly 12 miles south of downtown Portland at the crossroads of Interstate 5, Interstate 205, and Highway 99W, with additional transit access via TriMet's WES Commuter Rail, per Saling Homes. The city had an estimated population of 28,036 in 2026 and sits within Washington County, Oregon's second most populous county, home to major regional tech and commercial employment corridors.
The property's average unit size runs 976 square feet across one- to three-bedroom layouts, and amenities include a swimming pool, gym, playground, basketball court, bocce ball court, resident clubhouse, 120 on-site storage units, and direct trail access, along with 301 parking spaces and a dog park. CBRE Capital Markets originated a $34.6 million Fannie Mae loan tied to the deal.
Oregon's rent control statutes add another layer to the property's appeal for a new owner focused on market-rate flexibility. The state caps annual rent increases at 7 percent plus the regional Consumer Price Index, capped at 9.5 percent for 2026 under ORS 90.323 and 90.324, according to Oregon.gov. But properties whose certificate of occupancy was issued within the past 15 years are exempt from that cap under Oregon Revised Statutes Chapter 90, and since River Ridge was completed in 2017, it remains outside the state's rent-control ceiling, per Platuni.
A Bigger Pattern for Both Buyer and Seller
The deal also fits into larger strategic moves underway at both companies. Buyer Bridge Investment Group was itself acquired by global asset manager Apollo Global Management in a $1.5 billion transaction completed in September 2025, a deal that left Bridge operating as a standalone real estate platform managing roughly $50 billion in assets within Apollo's alternative investment business, according to GlobeNewswire. Bridge has been actively expanding its Pacific Northwest suburban footprint, having acquired two Federal Way, Washington apartment complexes totaling 335 units in February in what was King County's largest commercial sale of early 2026, as Hoodline reported in its earlier coverage of that deal.
Seller Security Properties, meanwhile, announced in March that it was exiting the in-house property management business entirely, transferring operational management of more than 30 Pacific Northwest communities totaling roughly 9,000 units, and about 400 on-site and corporate employees, to Maryland-based Bozzuto. The move, detailed by Bozzuto, narrowed Security Properties' focus to acquisitions and investment management, positioning the River Ridge sale as part of a broader capital-recycling strategy the firm has continued elsewhere in the region.
