This classic Balboa Island cottage offers far more than meets the eye, with five bedrooms in the main home and an additional bedroom in the separate downstairs apartment—providing plenty of space for friends and family. The main house features a spacious front patio, an expansive living room with vaulted ceilings and a brick fireplace. There’s a charming window seat in the dining area and a well-designed kitchen. Just three doors from North Bayfront and steps from Marine Avenue’s shops and restaurants, this convenient location means the best of the Island is steps away, and getting on and off the Island is a snap. A wider-than-average two-car garage adds valuable parking, while the separate apartment offers flexibility as a guest suite, income property, or potential expansion of the main home into a downstairs primary suite or additional living space. Lovingly owned by the same family since 1969, this classic Island cottage is now ready for a new chapter.
MLS #
CRNP25021775
MLS Source
California Regional MLS
Fireplace
Living Room
Flooring
Brick
Laundry
In Garage
Cooling
None
Pool
None
Garage/Parking
Garage: 2 Car(s)
Elementary District
Newport-Mesa Unified
High School District
Newport-Mesa Unified
HOA Fee
$0
324 Onyx Ave is a Duplex in Newport Beach, CA 92662. This 2,242 square foot property sits on a 2,550 Sq Ft Lot and features 6 bedrooms & 3 full and 1 partial bathrooms. It is currently priced at $3,200,000 and was built in 1937.
This address can also be written as 324 Onyx Ave, Newport Beach, CA 92662.©2025 California Regional MLS. All rights reserved. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker or MLS. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information. Information provided is for personal, non-commercial use by the viewer and may not be redistributed without explicit authorization from California Regional MLS.
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This listing information is up-to-date as of May 13, 2025. For the most current information, please contact Ryan Gunderson, (949) 873-3841