Harbor Associates Listed Historic Vault for Sale
The 107,630-square-foot downtown Denver landmark is now on the market as a vacant commercial property.
Updated on Sept. 21, 2026 in Commercial
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Harbor Associates has listed The Vault at 821 17th Street for sale following extensive renovations. The nine-story property, which has been vacant since 2021, is being marketed for potential office, residential, or hospitality use.
Why it matters
The listing reflects the broader struggle with office vacancies in downtown Denver following the departure of major tenants like WeWork. The sale highlights the challenge of repurposing historic urban assets in an era of shifting work patterns.
The Vault offers 107,630 square feet of total space and features a 23-foot high entrance atrium. The property was originally constructed in 1907.
The players
Harbor Associates
This is a real estate investment firm based in Seal Beach, California, that specializes in acquiring and repositioning commercial properties.
JLL
JLL is a global commercial real estate services company that is currently acting as the broker for the sale of The Vault.
WeWork
WeWork is a global company that provides shared workspaces for technology startups and other enterprises.
The details
The building is an L-shaped structure with wings measuring 50 feet wide, having undergone significant exterior facade and mechanical system upgrades. Brokerage firm JLL is presenting the property, which is currently offered without existing leases.
Timeline
The building was originally constructed in 1907.
The site was designated a Denver Landmark in 1977.
Harbor Associates purchased the property in 2017.
WeWork leased 40,000 square feet in 2018.
WeWork vacated the property in 2021.
Roadmap
The sale of The Vault reflects a wider trend of investors seeking to reposition legacy commercial assets amidst downtown Denver's persistent 38% office vacancy rate. This transition marks a broader industry shift toward adaptive reuse of older office stock for alternative purposes.
The sale of this prominent downtown landmark may signal shifts in local property valuations and redevelopment potential for the surrounding 17th Street corridor. Residents and local workers should expect to see potential transitions in usage as the site moves from a vacant building to a new commercial or residential project.
The takeaway
Investors looking at urban real estate are increasingly focused on the flexibility of floor plates to support mixed-use conversion. Potential buyers should carefully evaluate the mechanical upgrades and historic preservation requirements before committing to a repositioning strategy.
Further reading
For more on the local market, visit the Denver Commercial section.
Source note: This article includes information reported by The Times of India.
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