ADU Construction cost per square foot in McKinney
ADU Construction cost per square foot in McKinney, Texas in 2026.
Low
$156,000
Average
$234,000
High
$312,000
McKinney crews quote about $260 – $520 per square foot.
Multiply local unit rates by your real measurements.
What drives adu construction prices in McKinney
Local labor, permitting and climate move McKinney prices away from the national average.
Labor market
Growth-corridor suburb with steady demand and slightly premium pricing.
Permits
City permits and HOA approvals are common.
Climate
Hail exposure and heavy clay soils affect foundations.
McKinney unit pricing by material
Ways to lower your McKinney 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.
McKinney questions
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