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ADU Builders & Contractors in Grand Terrace, CA

Building an ADU in Grand Terrace? You'll find 22 licensed contractors in the area, ready to help. Grand Terrace's ADU market continues to grow as homeowners invest in additional living space, rental income, and multi-generational housing.

📊 ADU Quick Facts for Grand Terrace

Avg. Cost/sqft

$201-$376

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 22 ADU Contractors in Grand Terrace

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#1HUISKEN CONSTRUCTION

Grand Terrace, CA

Huisken Construction — licensed ADU contractor in Grand Terrace, CA. Detached ADU construction. 37+ years experience.

View Profile📞 (909) 370 2876
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#2AMERIBUILD

Grand Terrace, CA

Ameribuild — licensed ADU contractor in Grand Terrace, CA. Detached ADU construction. 24+ years experience.

View Profile📞 (909) 264 3155
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#3MC COY CONSTRUCTION INC

Grand Terrace, CA

MC Coy Construction Inc — licensed ADU contractor in Grand Terrace, CA. Detached ADU construction.

View Profile📞 (909) 208 0341
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#4CHRONISTER CONSTRUCTION

Grand Terrace, CA

Chronister Construction — licensed ADU contractor in Grand Terrace, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (909) 423 0427
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#5A J ELECTRIC AND CONSTRUCTION SERVICES INC

Grand Terrace, CA

A J Electric And Construction Services Inc — licensed ADU contractor in Grand Terrace, CA. Detached ADU construction. 28+ years experience.

View Profile📞 (909) 825 3147
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#6MCIVER'S CONSTRUCTION INC

Grand Terrace, CA

Mciver'S Construction Inc — licensed ADU contractor in Grand Terrace, CA. Detached ADU construction.

View Profile📞 (951) 924 0767
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#7T I CONSTRUCTION

Grand Terrace, CA

T I Construction — licensed ADU contractor in Grand Terrace, CA. Detached ADU construction. 24+ years experience.

View Profile📞 (909) 888 9000
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#8R J BUILDERS

Grand Terrace, CA

R J Builders — licensed ADU contractor in Grand Terrace, CA. Detached ADU construction. 14+ years experience.

View Profile📞 (909) 915 7115
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#9TRUELINE INSULATION INC

Grand Terrace, CA

Trueline Insulation Inc — licensed ADU contractor in Grand Terrace, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (909) 825 5397
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#10BETTER ROOFING

Grand Terrace, CA

Better Roofing — licensed ADU contractor in Grand Terrace, CA. Detached ADU construction. 10+ years experience.

View Profile📞 (844) 788 4663
View All 22 Contractors →

💰 How Much Does an ADU Cost in Grand Terrace?

Garage Conversion

$70,500 - $130,500

Converting existing garage to living space

Detached ADU

$151,000 - $326,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,114 - $5,114

Plan check, permits, utility connections

* Costs vary based on size, finishes, site conditions, and contractor. Get quotes from multiple Grand Terrace contractors to compare pricing.

❓ Frequently Asked Questions About ADUs in Grand Terrace

How much does it cost to build an ADU in Grand Terrace?▼
The average cost to build an ADU in Grand Terrace ranges from $151,000 to $326,000, or approximately $201 to $376 per square foot. Garage conversions typically cost $70,500 to $130,500.
How long does it take to get an ADU permit in Grand Terrace?▼
The ADU permit process in Grand Terrace typically takes 60 to 120 weeks. California law requires cities to approve or deny ADU permits within 60 days of receiving a complete application.
What are the ADU size limits in Grand Terrace?▼
In Grand Terrace, detached ADUs can be up to 1200 square feet. Attached ADUs are limited to 50% of the primary dwelling or 1,200 sqft, whichever is less. Junior ADUs (JADUs) are limited to 500 sqft and must be within the existing home.
What is the setback requirement for ADUs in Grand Terrace?▼
Grand Terrace requires 4-foot setbacks from side property lines and 4-foot setbacks from rear property lines for new ADU construction. Converted structures (like existing garages) may maintain their current setbacks.
Do I need to provide parking for my ADU in Grand Terrace?▼
No parking is required for ADUs in Grand Terrace if your property is within half a mile of public transit, in a historic district, part of an existing multi-family building, or if the ADU is a garage conversion. Otherwise, one space may be required.

Also See ADU Contractors In

Los Angeles (3215)San Diego (2582)San Francisco (2170)Sacramento (1551)Riverside (925)Fresno (904)Anaheim (784)Irvine (760)

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