ADU Construction cost per square foot in Denver
ADU Construction cost per square foot in Denver, Colorado in 2026.
Low
$163,500
Average
$245,300
High
$327,000
Denver crews quote about $275 – $545 per square foot.
Multiply local unit rates by your real measurements.
What drives adu construction prices in Denver
Local labor, permitting and climate move Denver prices away from the national average.
Labor market
Denver labor runs about 10% above the national average and books out in summer.
Permits
Denver permits required for roofing, structural, electrical and fences.
Climate
Hail is the top driver of roof replacement; freeze-thaw affects concrete.
Denver unit pricing by material
Ways to lower your Denver price
- Use pre-approved ADU plans where your city offers them — saves months and design fees.
- Detach only if required; attached and conversion ADUs cost far less.
- Collect three written bids on an identical scope — spreads of 20–40% are normal.
- Book in the off-season and stay flexible on the start date to save 5–15%.
- Bundle nearby work into one mobilization so you only pay setup and travel once.
- Ask what the contractor would change to cut 10% without hurting durability.
Denver questions
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