Denver's failed office conversion meets the $24-a-foot market

The 16-story tower at 475 17th St. is going to auction on a 2015 basis of $26 million for 151,425 square feet of 1975-vintage office, roughly $172 a square foot. This year's Denver auction calendar has already printed a comparison nowhere near that number. A 149,222-square-foot downtown-adjacent tower at 216 16th St. cleared for $3.6 million in August, about $24 a square foot, which prices 1970s office as land, a shell and a demolition budget bundled together.

The sellers are Civicap Partners and Revesco Properties, which have owned 475 17th since 2015, and the plan for those years was to convert the office floors to apartments. Because Civicap invests in attainable housing projects, the conversion looks like the thesis at acquisition rather than a late pivot. It did not happen, and the coverage does not say why, which leaves CBRE running the sale to the highest bidder through its auction platform TenX.

Denver will supply at least three such tests this year by the Denver Business Journal's count: the 10-story 1630 Welton St. starts bidding Oct. 19, and 216 16th St. cleared in August. The 475 17th auction site lists 93,837 square feet available for lease, about two-thirds of the building, a marketing figure rather than a vacancy rate, though not one that describes a fully leased property.

Conversion arithmetic is unforgiving at this basis: an office-to-apartment deal carries when the entry price sits far enough below the residential yield, or when the office cash flow holds near the basis long enough to fund the repositioning while the apartments fill. On a 1975 building with roughly two-thirds of its space being marketed for lease, the second leg is the harder one, and the auction is what Denver has instead of a negotiation: a public print on what the conversion option is worth.

Office finds a clearing mechanism only where a trade prints, as this publication has argued. Merritt 7 in Norwalk is what a printed conversion looks like: two office buildings traded to a joint venture planning 286 apartments, with a $75.5 million construction loan underwriting the next use. September's Southern California office trades make the same point in reverse: two sales priced within two dollars a foot of each other even though 8.5 points of occupancy separated them. That is what happens when buyers are paying for the plan around the building.

The Denver result belongs next to the $24-a-foot August print, with $26 million from 2015 standing only as a measure of what got written down. 475 17th should clear closer to a land-and-repositioning number than to anything the apartment rents can carry today, and that print will move how Denver owners of similar 1975 stock mark their own equity. That leaves eleven years, one abandoned plan, and a TenX bid screen to say what the residual is worth.