What about Prefab ADUs or ADU kits? 

Prefab ADU vs stick built ADU’s is common question in Denver 

We are deeply skeptical of “one-size-fits-all” ADU models and especially one-size-fits-all budgets. While many companies are offering pre-fab, modular ADU models, it doesn’t mean they adhere to the size and requirements of your specific lot or neighborhood. These pre-designed modular kits can have an appealing price tag “ADU’s under $150,000,” but that is only for the building itself. What if the sewer needs to run to the street instead of the alley? What are the foundation requirements and is that factored into the cost? Does it include the required insulation, which is a stringent as it’s ever been in Denver? These are all questions we’ve answered before and ones that a turnkey ADU model often misses. 

Every neighborhood has its nuances. Overlay districts, landmark designations, alley access, owner-occupancy rules, parking standards — these details matter. The City of City and County of Denver has made meaningful progress in streamlining ADU approvals, but there are still zoning traps that can create delays or unexpected costs. Modular or Prefab ADUs can miss these nuances. We have familiarized ourselves with these to eliminate blind spots before they impact your budget or schedule.