Some of the biggest ADU cost drivers are factors you don't even decide.
They’re the ones tied to your property.
We break ADU costs into three buckets:
• Fixed conditions (jurisdiction, overlays/zones, property factors)
• Location-dependent factors (topography, placement)
• Homeowner driven (size, finishes, upgrades)
Most homeowners focus on the last one. But the first two set the floor.
That’s why two “similar” ADUs can differ by $100K+.
Learn more in our report: https://snapadu.com/lessons-from-100-adu-builds-detached-adu-report-san-diego/#Why_Homeowners_Underestimate_the_True_Cost_of_Building_an_ADU
