What is the maximum ADU size allowed in Cardiff?

Detached ADUs in Cardiff can be up to 1200 square feet.

ADU Builders & Contractors in Cardiff, CA

Q: How much does it cost to build an ADU in Cardiff?

The average cost ranges from $147,000 to $322,000, or $197-372 per square foot.

Q: How long does it take to get an ADU permit in Cardiff?

The permit process typically takes 60 to 120 weeks in Cardiff.

Cardiff, CA is home to 35 ADU contractors ready to help. From initial permits to final inspection, these local professionals know Cardiff's building codes and can guide your project from concept to completion.

📊 ADU Quick Facts for Cardiff

Avg. Cost/sqft

$197-$372

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 35 ADU Contractors in Cardiff

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#1BROWN DOG RENOVATIONS

Cardiff, CA

Brown Dog Renovations — licensed ADU contractor in Cardiff, CA. Detached ADU construction. 16+ years experience.

View Profile 📞 (760) 975 5189

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#2TESSIERI ROBERT W

Cardiff, CA

Tessieri Robert W — licensed ADU contractor in Cardiff, CA. Detached ADU construction. 35+ years experience.

View Profile 📞 (760) 436 5145

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#3MEZAN BUILDERS

Cardiff, CA

Mezan Builders — licensed ADU contractor in Cardiff, CA. Detached ADU construction. 11+ years experience.

View Profile 📞 (858) 334 5056

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#4B S M CONSTRUCTION CO

Cardiff, CA

B S M Construction CO — licensed ADU contractor in Cardiff, CA. Detached ADU construction. 36+ years experience.

View Profile 📞 (619) 520 6308

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#5MELTON RICHARD CONSTRUCTION INC

Cardiff, CA

Melton Richard Construction Inc — licensed ADU contractor in Cardiff, CA. Detached ADU construction. 23+ years experience.

View Profile 📞 (760) 420 0804

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#6BUMANN BUILDERS

Cardiff, CA

Bumann Builders — licensed ADU contractor in Cardiff, CA. Detached ADU construction. 26+ years experience.

View Profile 📞 (760) 300 8520

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#7JAVEDANI SAHBA

Cardiff, CA

Javedani Sahba — licensed ADU contractor in Cardiff, CA. Detached ADU construction. 18+ years experience.

View Profile 📞 (858) 692 9559

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#8DAYANI CONSTRUCTION

Cardiff, CA

Dayani Construction — licensed ADU contractor in Cardiff, CA. Detached ADU construction. 27+ years experience.

View Profile 📞 (858) 263 9063

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#9WALLOCK ALAN J COMPANY

Cardiff, CA

Wallock Alan J Company — licensed ADU contractor in Cardiff, CA. Detached ADU construction. 50+ years experience.

View Profile 📞 (760) 944 9700

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#10BUECHLER CONSTRUCTION & DEVELOPMENT INC

Cardiff, CA

Buechler Construction & Development Inc — licensed ADU contractor in Cardiff, CA. Detached ADU construction. 17+ years experience.

View Profile 📞 (760) 942 9440

View All 35 Contractors →

💰 How Much Does an ADU Cost in Cardiff?

Garage Conversion

$68,500 - $128,500

Converting existing garage to living space

Detached ADU

$147,000 - $322,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,097 - $5,097

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Cardiff

How much does it cost to build an ADU in Cardiff?▼

The average cost to build an ADU in Cardiff ranges from $147,000 to $322,000, or approximately $197 to $372 per square foot. Garage conversions typically cost $68,500 to $128,500.

How long does it take to get an ADU permit in Cardiff?▼

The ADU permit process in Cardiff 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 Cardiff?▼

In Cardiff, 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 Cardiff?▼

Cardiff 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 Cardiff?▼

No parking is required for ADUs in Cardiff 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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