How much does adu construction cost in Manteca?

Most Manteca projects land between $153,000 – $306,000, with an average near $229,500. Local crews quote roughly $255 – $510 per square foot.

What is included in the Manteca price per square foot?

Typically materials, labor and cleanup. Permits, disposal and access challenges are usually quoted separately.

Unit pricing

Manteca adu construction pricing per square foot

ADU Construction cost per square foot in Manteca, California in 2026.

Low

$153,000

Average

$229,500

High

$306,000

Manteca crews quote about $255 – $510 per square foot.

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What drives adu construction prices in Manteca

Local labor, permitting and climate move Manteca prices away from the national average.

Labor market

Licensed Manteca contractors carry California workers' comp and prevailing wage pressure, and crews here quote roughly 2% above the national labor average. Demand in the Central Valley market peaks in spring, so booking early usually beats a rush premium.

Permits

Manteca follows the California Building Standards Code, so most structural, electrical, plumbing and re-roof work needs a permit from the Manteca building department plus Title 24 energy compliance. Valley jurisdictions add farmland and air-quality district conditions on larger scopes.

Climate

Manteca sits in a hot inland valley climate with triple-digit summers, so expect material choices that tolerate heat and UV, and crews that start work early in the day during summer.

Manteca unit pricing by material

Prefab studio ADU$235 – $325

Site-built 1-bedroom$325 – $430

Site-built 2-bedroom$430 – $555

Custom high-end ADU$555 – $765

Ways to lower your Manteca 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.

Manteca questions

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