Rialto Capital Foreclosed on 580 Market Street Property

The San Francisco office building faced foreclosure after the owner failed to repay a $15.7 million loan.

Updated on Sept. 30, 2026 in Commercial

The facade of a weathered stone and glass office building in a dense urban financial district. — Rialto Capital seized the office building at 580 Market Street in San Francisco after the property owner defaulted on a $15.7 million loan. AI Illustration. Upload story photo >

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Rialto Capital has seized the office building at 580 Market Street in San Francisco following a loan default. The property, once purchased for $24.2 million, now carries $17.5 million in unpaid debt.

Why it matters

The foreclosure reflects significant valuation shifts in the city's commercial real estate market, as the building's appraisal fell to $9.9 million by March 2026. This highlights the financial strain on office properties that struggle with low occupancy rates.

Official filings show $17.5 million in total unpaid debt, a sharp contrast to the property's March 2026 valuation of $9.9 million. This follows a period of low demand where the building reported just 53 percent occupancy as of December 2024.

The players

Rialto Capital

An investment firm that manages real estate assets and handles foreclosures on commercial properties.

Paragon Company

The former owner of 580 Market Street that purchased the building in 2015.

The details

Rialto Capital took control of the 35,000-square-foot property for a $5 million payment after the previous owner failed to satisfy the loan upon its June 2025 maturity. The building, located in the Financial District near the Montgomery BART station, had been purchased by Paragon Company for $24.2 million in 2015 before the recent default. Declining valuations and lower occupancy levels have created a difficult environment for owners navigating loan maturity requirements.

2015: Paragon Company acquired the property at 580 Market Street.
June 2025: The $15.7 million loan reached its maturity date.
October 2025: A notice of default was served to the property owner.
March 2026: The building was valued at $9.9 million.
Q1 2028: The disposition of the property is expected.

Money Landscape

This foreclosure occurs against a backdrop of a 27.2 percent total office vacancy rate across San Francisco. The development marks a departure from peak valuation periods for Financial District properties.

Investors and homeowners in the area should monitor how commercial distress impacts local business districts and property tax assessments. Consult a qualified financial professional to understand how shifts in real estate valuations might affect broader portfolio diversification strategies.

The takeaway

Commercial property owners and investors should note the risks associated with maturing loans in a low-occupancy environment. Keep a close watch on local market valuations and property tax notices to understand if neighboring commercial trends influence your personal investment outlook.