ADU Zoning Rules for Every City

Find the exact size limits, setbacks, permit costs, and regulations for building an ADU in your city. 60 cities across 19 states — updated as laws change.

60Cities Covered
19States
UpdatedWeekly

California ADU Rules

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Los Angeles, CA

9/10

Max size: 1,200 sq ft · Setbacks: 4 ft for units ≤16 ft height

Rent: $1,800-$2,500/mo Build: $150,000-$350,000
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San Francisco, CA

9/10

Max size: 1,200 sq ft (state minimum; local program caps at 850-1,000 sq ft) · Setbacks: 4 ft minimum

Rent: $2,200-$3,200/mo Build: $200,000-$450,000
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San Diego, CA

9/10

Max size: 1,200 sq ft · Setbacks: 4 ft

Rent: $1,600-$2,200/mo Build: $120,000-$300,000
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San Jose, CA

8/10

Max size: 1,200 sq ft · Setbacks: 4 ft

Rent: $2,000-$2,800/mo Build: $180,000-$400,000
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Sacramento, CA

8/10

Max size: 1,200 sq ft · Setbacks: 4 ft

Rent: $1,300-$1,800/mo Build: $100,000-$250,000
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Oakland, CA

8/10

Max size: 1,200 sq ft · Setbacks: 4 ft

Rent: $1,800-$2,600/mo Build: $160,000-$380,000
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Long Beach, CA

8/10

Max size: 1,200 sq ft · Setbacks: 4 ft

Rent: $1,500-$2,100/mo Build: $120,000-$280,000
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Fresno, CA

7/10

Max size: 1,200 sq ft · Setbacks: 4 ft

Rent: $1,000-$1,400/mo Build: $80,000-$200,000
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Santa Ana, CA

7/10

Max size: 1,200 sq ft · Setbacks: 4 ft

Rent: $1,700-$2,300/mo Build: $130,000-$300,000
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Anaheim, CA

7/10

Max size: 1,200 sq ft · Setbacks: 4 ft

Rent: $1,700-$2,300/mo Build: $130,000-$290,000
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Ontario, CA

8/10

Max size: 1200 sq ft · Setbacks: 4 ft minimum

Rent: $1,400-$1,800 Build: $180,000-$300,000
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Riverside, CA

8/10

Max size: 1200 sq ft; may reduce to 800 sq ft if lot coverage exceeded · Setbacks: 4 ft maximum (detached new construction)

Rent: $1,300-$1,700 Build: $170,000-$280,000
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San Bernardino, CA

8/10

Max size: 1200 sq ft; reduces to 800 sq ft if lot coverage exceeded · Setbacks: 4 ft minimum (detached new construction)

Rent: $1,300-$1,700 Build: $160,000-$280,000
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Rancho Cucamonga, CA

8/10

Max size: 1200 sq ft · Setbacks: 4 ft minimum (detached new construction)

Rent: $1,400-$1,800 Build: $170,000-$290,000
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Fontana, CA

8/10

Max size: 1200 sq ft · Setbacks: 4 ft minimum (detached new construction)

Rent: $1,300-$1,700 Build: $160,000-$270,000
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Why Build an ADU?

Accessory Dwelling Units are one of the smartest investments homeowners can make.

💰

Rental Income

Earn $1,000-$4,000+ per month in rental income depending on your market. Many homeowners cover their entire mortgage payment with ADU rent.

🏠

Property Value

ADUs typically increase property value by $100,000-$300,000 — often more than the construction cost. A smart investment that pays for itself.

👪

Housing Flexibility

House aging parents, adult children, or guests. Use it as a home office. The flexibility of an ADU adapts to your life as it changes.

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