A seven-story office-and-data-center at 12121 Grant Street in Thornton has hit the market at $28 million, putting roughly 267,000 square feet of rentable space and heavy-duty digital infrastructure in play. The Kramer Group of Marcus & Millichap is pitching the site as a mixed office building and shell data center with immediate redevelopment potential, and brokers are leaning hard on a simple selling point: the power and fiber are already in the ground, so operators do not have to wait years for a ground-up build.
Infrastructure and capacity
According to LoopNet, the property spans 12 acres and currently pulls about 3.5 megawatts of utility power, with switchgear and downstream distribution sized to handle up to 7 MW. The marketing brochure highlights five 1,200 kW diesel generators, for around 6 MW of backup capacity, along with about 30,000 gallons of on-site fuel storage and roughly 3,000 tons of cooling capacity.
The listing also points to diverse carrier access, including Comcast, Verizon, CenturyLink, AT&T and Dish, plus dark-fiber routes that run to downtown carrier hotels. For operators chasing low-latency connections without months of permitting and trenching, that built-in connectivity is the main attraction.
History and tenants
As reported by Data Center Dynamics, the building started life as a Qwest facility and underwent a renovation in 2014 before Avaya moved in for lab operations. Company filings also indicate MYR Group maintains an address at the site, suggesting the property already generates partial income for whoever owns it. The firm’s annual report lists 12121 Grant Street as a corporate address.
Local policy context
Timing is doing the seller a favor. Denver City Council approved a one-year moratorium on new data center construction on May 19, 2026, a move that could push demand toward existing facilities that are ready to switch on, according to Denver7. Jefferson County has its own 10-month pause that county officials outlined in a news release, framing the timeout as a way to study impacts on water, energy and surrounding neighborhoods before greenlighting more projects.
Price and prospects
At the $28 million asking price, or roughly $104.82 per rentable square foot, the brochure argues the asset is being offered below replacement cost and offers a clear path to increase utilization and drive value, according to LoopNet. For a buyer with the capital and know-how to activate the shell data center space and fully leverage the on-site connectivity, brokers suggest that leasing to colocation, cloud or edge compute operators could be where the real upside lives.
