ADUByCity
Verified March 14, 2026

ADU Regulations in Newport Beach, California

Orange County · CA · Pop. 85,000

Max ADU Size

1,200

sq ft detached

Rear Setback

4 ft

Permit Timeline

60 days

Build Cost

$200,000 – $410,000

Zoning

Allowed ADU Types

✓Detached ADU
✓Attached ADU
✓JADU (Junior ADU)
✓Garage Conversion
Max per lot: 2 ADUs✓ No owner-occupancy required

Coastal Zone properties require a Coastal Development Permit (CDP) from the California Coastal Commission in addition to city permits. ADUs in the Coastal Zone are subject to additional review for view, public access, and compatibility with coastal land use plans.

Source: City of Newport Beach — Planning Division · Newport Beach Municipal Code Section 20.48.200

Dimensions

Size & Setback Requirements

Detached

1,200

sq ft max

JADU

500

sq ft max

Attached

50% of primary home, max 1,200 sq ft

Setbacks

front

Same as primary dwelling

side

4 ft

rear

4 ft

Max height: 16 ft

Lot coverage: Per underlying zone

Height and setback standards may be more restrictive in the Coastal Zone. Harbor-adjacent lots may have additional overlay restrictions. Detached ADUs replacing an existing garage may be built to the garage's existing footprint.

Permitting

Permit Process

Department

Community Development Department — Planning Division

Review Timeline

60 days

Permit Fees

$10,000 – $20,000

Impact Fees

Impact fees waived under 750 sq ft

Required Documents

  • ›Site plan
  • ›Floor plans
  • ›Elevations
  • ›Title 24 energy compliance
  • ›Structural drawings
  • ›Coastal Development Permit application (if in Coastal Zone)

Newport Beach is one of the higher-fee ADU markets in Southern California due to premium infrastructure costs. Coastal Zone applications add processing time; applicants should budget 3–6 additional months for CDP review by the California Coastal Commission if the lot falls within the Coastal Zone.

Visit Community Development Department — Planning Division →

Infrastructure

Utilities & Requirements

Solar

Required

Parking

Not required

Separate Meter

Optional

Fire Sprinklers

See note

Sewer: Connection to city sewer required; capacity fee may apply for new unit
Fire Sprinklers: Not required unless primary structure requires them
Parking: No additional parking required

Financials

ADU Costs in Newport Beach

Typical Build Cost

$200,000 – $410,000

Cost per Sq Ft

$275 – $360

Monthly Rental

$2,500 – $4,000/mo/mo

Property Value Added

Adds $300,000 – $550,000 to property value

Available Grants & Programs

  • ★CalHFA ADU Grant Program available

Newport Beach ADUs command among the highest rents in Southern California, particularly in harbor-adjacent and Coastal Zone neighborhoods. Premium finishes are expected by renters in this market. Short-term rental of ADUs is subject to city transient occupancy tax regulations.

Use the free ADU Cost Calculator →

Free Service

Get Contractor Quotes in Newport Beach

Connect with licensed local ADU contractors. Takes 2 minutes, no obligation.

Get Free Quotes
Disclaimer: Information is compiled from publicly available municipal codes for general informational purposes only. It does not constitute legal, zoning, or construction advice. Regulations change frequently. Always verify with your local planning department. Last verified: March 14, 2026. Verify with Community Development Department — Planning Division

Explore More

Nearby Cities in Orange County

Anaheim

Max 1,200 sq ft · $140,000 – $300,000

Santa Ana

Max 1,200 sq ft · $120,000 – $260,000

Irvine

Max 1,200 sq ft · $160,000 – $340,000

Huntington Beach

Max 1,200 sq ft · $175,000 – $380,000

Garden Grove

Max 1,200 sq ft · $160,000 – $330,000

Fullerton

Max 1,200 sq ft · $160,000 – $330,000

Newport Beach Quick Facts

  • Max size1,200 sq ft
  • Rear setback4 ft
  • Permit timeline60 days
  • Build cost$200,000 – $410,000
  • Rental income$2,500 – $4,000/mo/mo
  • Owner occupancyNot required

Get Free Quotes

Licensed Newport Beach ADU contractors, no obligation.

Get My Free Quotes

Official Source

City of Newport Beach — Planning Division

Newport Beach Municipal Code Section 20.48.200

Last verified: March 14, 2026

Free Tools

→ ADU Cost Calculator→ ROI Calculator

Stay Updated

ADU rules change often.

Get notified when Newport Beach's regulations update, plus guides on permitting and financing.