$16,750,000
21 Bay Island
Listing Office: Balboa Real Estate, Inc

Communities · Newport Beach
A grounded look at Bay Island, the private car-free island in Newport Harbor held through a shareholder association and reached by footbridge, with the unusual ownership structure that shapes a purchase here.
Direct answer
Bay Island is a private, car-free island of a few dozen homes in Newport Harbor in Newport Beach, Orange County, reached by footbridge from the Balboa Peninsula and held through a shareholder association, one of the rarest ownership structures on the West Coast.
Last updated 2026-07-07
Market snapshot
Median sale price
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Closed, last 6 months
Median days on market
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List to close, sold
Active listings
1
Currently on market
Median price / sq ft
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Closed sales
Homes sold (6 mo)
0
Closed, trailing 6 months
Sale-to-list ratio
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Median close vs list
Months of supply
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Inventory vs absorption
Median list price
$16,750,000
Active inventory
Live Bay Island statistics from the California Regional MLS (CRMLS) via CoreLogic Trestle, refreshed automatically and deemed reliable but not guaranteed. For a precise, address-level read, ask Craig and Justin.
Figures reflect active and recently closed listings in Bay Island, drawn from California Regional Multiple Listing Service data. They are market statistics, not appraisals, and not legal, tax, or financial advice. Ratowsky Group are licensed real estate professionals, not appraisers, lenders, attorneys, or tax advisors. Market conditions change, and a specific property can differ significantly from any median. Verify permits, association documents, insurance, and tenancy status for any specific property, and confirm valuation, financing, and tax questions with the appropriate licensed professional. For a read on a particular home, reach Craig or Justin Ratowsky at 714-336-5682. Craig Ratowsky DRE #00608046, Justin Ratowsky DRE #02026158. Equal Housing Opportunity.
On the market
$16,750,000
21 Bay Island
Listing Office: Balboa Real Estate, Inc
The multiple listing data appearing on this website, or contained in reports produced therefrom, is owned and copyrighted by California Regional Multiple Listing Service, Inc. (“CRMLS”) and is protected by all applicable copyright laws. Information provided is for viewer’s personal, non-commercial use and may not be used for any purpose other than to identify prospective properties the viewer may be interested in purchasing. All listing data, including but not limited to square footage and lot size, is believed to be accurate, but the listing Agent, listing Broker and CRMLS and its affiliates do not warrant or guarantee such accuracy. The viewer should independently verify the listed data prior to making any decisions based on such information by personal inspection and/or contacting a real estate professional. Properties may be listed by brokerages other than Ratowsky Group at Compass; each listing is attributed to its listing office. Based on information from California Regional Multiple Listing Service, Inc. as of 2026-08-25 02:49:34 PDT and/or other sources, delivered via CoreLogic Trestle. 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. © 2026 CRMLS. Ratowsky Group at Compass. Craig Ratowsky DRE #00608046, Justin Ratowsky DRE #02026158. Compass is a licensed real estate broker (CA DRE #01991628). Equal Housing Opportunity.
Location
E Bay Ave & Island Ave, Newport Beach, CA
Schools
Public schools here fall under the Newport-Mesa Unified School District; assignments run by address, so confirm the current attendance boundary for a specific home.
Elementary (K-5)
Assigned by address within Newport-Mesa Unified · Newport-Mesa Unified School District
Middle (6-8)
Assigned by address within Newport-Mesa Unified · Newport-Mesa Unified School District
High (9-12)
Newport Harbor High School · Newport-Mesa Unified School District
School assignments change and run by address. Confirm the current attendance area for any specific property with the district before you rely on it.
Bay Island is a small private island in Newport Harbor, off the Balboa Peninsula near East Bay Avenue and Island Avenue. It holds only a few dozen homes and is car-free, reached on foot across a footbridge from the Peninsula. There are no interior streets in the usual sense, and the island wraps its homes around a shared, walkable setting on the bay.
What sets it apart most is how ownership works. The island is held through a shareholder association rather than the conventional lot-by-lot fee ownership you find elsewhere in the harbor, one of the rarest ownership structures on the West Coast. That structure is central to understanding what a buyer is actually acquiring here.
The homes range in age and style across a very small inventory, most with a bay outlook given the island's compact footprint. Because the island is so small and rarely comes up for sale, each home that trades is more of an event than a regular listing.
Given the shareholder structure, a purchase is best understood as acquiring an interest tied to a specific home rather than a conventional deeded lot. Confirm exactly what conveys, and how, with the association and with title before you rely on any assumption carried over from a standard harbor purchase.
Scarcity and the private, car-free setting drive value here. With only a few dozen homes and infrequent sales, Bay Island sits among the more exclusive addresses in Newport Harbor in terms of rarity, though the shareholder structure makes it a different kind of purchase from a fee-owned bayfront.
Because sales are so infrequent and the ownership is unusual, general price figures don't tell you much. For a realistic read on value, it's best to look at the specific home, the association's terms, and any recent comparable within the island through a direct conversation.
Access is on foot. The footbridge from the Balboa Peninsula is the way on and off the island, and there are no cars on the island itself, so day-to-day movement is walking. Parking and the transition from car to footbridge are practical points worth understanding before a purchase.
The Peninsula, its beaches, and the harbor are right at hand once you cross, and the bay surrounds the island for boating. The car-free character is the whole point for many, and it comes with the tradeoff of hauling in on foot.
The ownership structure comes first. Because Bay Island is held through a shareholder association, review the association's governing documents, the shareholder agreement, what a sale actually transfers, financing implications, and any fees or assessments before you go far. This is a different diligence path from a conventional harbor home, and title and the association are the sources of truth.
The waterfront and access questions still apply. Confirm any dock or slip arrangements, tidelands, and seawall condition, and understand that coastal permitting through the California Coastal Commission and the city governs waterfront work. Pull the flood zone and elevation and pair them with a written insurance quote for the specific home.
Ratowsky Group brings 58 years of combined, third-generation California real estate experience to coastal Orange County, with roots that go back to 1977. On an island where ownership runs through a shareholder association rather than a standard deed, that experience helps a buyer or seller ask the right questions early.
The approach is deliberately diligence-first: understand the shareholder structure and what a sale transfers, understand the waterfront and access, and understand where value sits in a market with very few sales. For a specific Bay Island opportunity, a direct conversation is the right way to plan.
Frequently asked
Sources & local citations
Qualitative claims framed as agent insight reflect Ratowsky Group’s direct experience working this market and are not represented as third-party verified data.
Adjacent communities
Balboa Peninsula
A grounded look at the Balboa Peninsula, three miles of beach town between Newport Harbor and the open Pacific, with the piers, the Fun Zone, and oceanfront and bayfront rows.
Balboa Island
A grounded look at Balboa Island, the walkable Newport Harbor grid of cottages and rebuilt bayfronts around Marine Avenue, with the diligence that shapes a purchase here.
Linda Isle
A grounded look at Linda Isle, the guard-gated ring of about a hundred bayfront homes with dock frontage, across the channel from Bay Island and the Pavilion.
Local brief
Bay Island's shareholder ownership makes it one of the more unusual purchases in Newport Harbor, and Craig and Justin Ratowsky are happy to walk through the structure, the access, and the diligence with you. No pressure, just useful information to help you build the right game plan. Reach Justin at 714-336-5682 or justin.ratowsky@compass.com.