One of downtown San Francisco’s older office buildings is being pushed to the brink, with a foreclosure auction now set for May 7 on a six-story property at 580 Market Street after its commercial mortgage-backed loan went into default.
The roughly century-old Class B building, long home to small retailers and creative office tenants, has been squeezed by falling occupancy and rising debt. With the loan in trouble and income dropping, lenders are now moving to sell, signaling yet another stress point for San Francisco’s already battered office core.
The auction date is tied to a roughly $15.7 million CMBS loan that went unpaid after it matured in June 2025, according to the San Francisco Business Journal. A notice of default filed late last year warned the borrower that a trustee’s sale could be next if the debt was not brought current, setting up this spring’s scheduled auction.
Servicer pushes for sale
Rialto Capital, acting as the special servicer on the troubled loan, took over servicing in February 2025 and is listed as the party pursuing foreclosure, The Real Deal reports. A notice of default filed in October pegged the outstanding balance at nearly $16.7 million, including fees and interest, according to servicer notes cited by industry trackers.
If the trustee’s sale proceeds, Rialto would be in a position to take control, complete the foreclosure process, and then decide whether to sell the property outright or try to reposition it. For now, though, the May 7 date is serving as a very public deadline for the current ownership to work something out.
How the building lost value
Paragon Company lists the block-front asset at roughly 35,000 square feet of mixed-use office and retail space, and public leasing materials show the six-story property was built in 1907 and is classified as a Class B office building. A current LoopNet listing and ownership materials confirm the size and vintage.
Appraisals and market data reviewed by industry outlets indicate that the property’s value has fallen sharply since it last traded in 2015. The owners paid about $24.2 million back then; more recent valuations and appraisals put the number far lower, reflecting weak downtown leasing and the hit that older, smaller offices have taken in the remote-work era.
Part of a growing trend
The trouble at 580 Market fits a broader pattern playing out across San Francisco’s urban core, where older Class B properties are bearing the brunt of tenant downsizing and lease expirations. Remote and hybrid work have hollowed out demand for traditional offices, and landlords with sizable debt loads are feeling the pressure.
The Real Deal has highlighted a series of lender seizures and foreclosure actions on Market Street and across the Bay Area this year, as special servicers move more quickly to recover losses and clear distressed loans from the books.
Locally, tenants and neighboring property owners are watching the May 7 auction for clues about who might take control of the building and whether a new owner will pour money into upgrades or pursue a broader repositioning. The sale could still be called off if the loan is reinstated at the last minute or if a negotiated workout comes together, but for now, the clock is ticking on 580 Market Street.
