The Construction
15–25 year build. 30,000–60,000 trades on site. $80–150B. Generational project.
The hard problems are not physics. They are construction sequencing, time, cost, workforce, and assembling an engineering consortium willing to put their name on a 1.5-mile structure.
15–25 years, minimum
The Burj took 6 years for 0.5 miles. Origin is 3× the height, six structures interlocked, on a fresh site requiring its own infrastructure first. Generational timeline. Phase 0 (site preparation, infrastructure, worksite city): 3–5 years. Phase 1 (foundation excavation, SMR vault, water reservoir): 2–4 years. Phase 2 (Foundation through Common tier — first 200 floors of all structures): 4–6 years. Phase 3 (Mid through High tier): 4–6 years. Phase 4 (Crown and Apex): 2–4 years. First occupancy possible around year 12–15; full completion year 15–25.
Six structures rising together
The six structures cannot be built sequentially. The Spire requires the Pillars for buckling restraint as it rises; the Pillars require the Spire and skybridges for lateral restraint as they rise. All six rise together, with skybridges tied at every 100 floors as the formation grows. Probably the single hardest practical problem in the project.
30,000–60,000 trades on site simultaneously
Peak construction. By trade: structural steel and concrete (largest), MEP, finishes, elevator, telescope and observatory specialty, security, infrastructure (HSR, water, power). Origin Construction probably runs as a unified prime contractor with multiple specialty subs.
A city next to the city
30,000–60,000 trades on a remote Colorado Plateau site cannot commute. Origin requires building a workforce city next to the formation — itself a project. Worker housing, dining, medical, recreation, family services, schooling for trades who bring families. The worksite city is in the buffer zone, designed to either persist post-construction (becoming Origin's surrounding community) or be dismantled (less likely, given infrastructure investment).
$80–150B over the build period
2026 dollars. Includes formation construction, infrastructure (water, power, HSR, regional airport), worksite city, telescope and Coliseum specialty, FF&E for residential and commercial, and substantial contingency. Per-floor cost averages roughly $30–55M — high by Manhattan standards, low for a structure that contains its own city services. Pending Detailed cost model.
Who signs the math
No structural engineering firm on Earth has signed off on a 1.5-mile structure. The first job after concept is assembling a consortium that can take collective responsibility for the math. Likely starting list: KPF + LERA + ARUP + SOM, plus telescope specialists, plus high-altitude HVAC specialists, plus elevator (KONE/ThyssenKrupp), plus geotechnical (Mueser Rutledge or equivalent on Precambrian foundations). A multi-firm signature, not a single name. Pending Consortium assembly.