$59,000,000
20 Harbor Island
Listing Office: Pacific Sotheby's Int'l Realty

Communities · Newport Beach
A grounded look at Harbor Island, the gated island of estate-scale bayfronts off Bayside Drive, consistently among the highest-priced addresses in Newport Harbor.
Direct answer
Harbor Island is a gated island of estate-scale bayfront homes in Newport Harbor in Newport Beach, Orange County, off Bayside Drive, consistently among the highest-priced addresses in the harbor.
Last updated 2026-07-07
Market snapshot
Median sale price
—
Closed, last 6 months
Median days on market
—
List to close, sold
Active listings
3
Currently on market
Median price / sq ft
—
Closed sales
Homes sold (6 mo)
0
Closed, trailing 6 months
Sale-to-list ratio
—
Median close vs list
Months of supply
—
Inventory vs absorption
Median list price
$9,995,000
Active inventory
Live Harbor 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 Harbor 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
$59,000,000
20 Harbor Island
Listing Office: Pacific Sotheby's Int'l Realty
$9,995,000
842 Harbor Island Drive
Listing Office: Kase Real Estate
$9,750,000
736 Harbor Island Drive
Listing Office: Pacific Sotheby's Int'l Realty
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 2026-08-24 21:00:53 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
Harbor Island Rd, 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)
Corona del Mar 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.
Harbor Island is a small gated island in Newport Harbor, reached off Bayside Drive by way of Harbor Island Road. It holds a limited number of estate-scale homes, most of them on the water, and its private, controlled access sets it apart from the public islands nearby. The island sits inside the harbor with the bay wrapping much of its edge.
The scale of the homes and the water frontage define the place. Where the Balboa islands are compact grids of cottages and rebuilt bayfronts, Harbor Island reads as a small collection of large estates, and it consistently ranks among the highest-priced addresses in Newport Harbor.
The island is made up of large custom homes on generous waterfront parcels, most with private dock frontage on the bay. Inventory is thin given the small number of homes, so sales are infrequent and each listing tends to stand on its own.
Because the parcels are large and the homes are custom, condition, architecture, and the specifics of the dock and frontage vary a great deal from one estate to the next. Two homes on the island can be very different properties despite sharing the same gated address.
Water frontage, dock, lot size, and the gated privacy all push Harbor Island to the top of the Newport Harbor market. Entry to the island is generally into the multi-millions given the estate scale and bayfront positions, and it stands among the highest-priced addresses in the harbor.
With so few sales, a single headline number won't tell you much. The realistic read comes from the specific home, its frontage and dock, its condition, and any recent comparable on the island, which is best handled through a direct conversation.
Access is by car through the gate off Bayside Drive via Harbor Island Road, which keeps the island private and quiet. Bayside Drive connects quickly to the wider Newport Beach street network and Coast Highway, and Fashion Island and Corona del Mar are a short drive away.
For boaters, the appeal is direct: homes with dock frontage sit on the bay with a route out to the main channel and the ocean. The gated, low-traffic setting is a core part of what the island offers.
On these bayfront estates, the dock and the tidelands are central. Docks in Newport Harbor generally sit over public tidelands under a city permit, so confirm the dock permit, any fees, the frontage, and the condition of the dock and seawall. Because it's a gated island, also review the association's governing documents, rules, and any fees or assessments.
Coastal permitting through the California Coastal Commission and the city governs waterfront work, seawalls, and major rebuilds, which matters given the estate scale and any renovation plans. Pull the flood zone and elevation, and pair a serious home with a written insurance quote so the full ownership picture is clear.
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 of estate-scale bayfronts where each home is its own property, that history helps a buyer or seller read frontage, dock, and value with a clear eye.
The approach is consistent: understand the estate and its frontage, understand the dock, tidelands, and gated rules, and understand where value sits in a market with few sales. For a specific Harbor Island home, a direct and confidential 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
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.
Beacon Bay
A grounded look at Beacon Bay, the bayfront enclave on city tidelands near Harbor Island Drive with its own beach and a distinctive leasehold history.
Bay Island
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.
Local brief
If you are weighing an estate on Harbor Island, Craig and Justin Ratowsky are happy to walk through the frontage, the dock and tidelands, the gated documents, and the market with you, confidentially. No pressure, just useful information to help you build the right game plan. Reach Justin at 714-336-5682 or justin.ratowsky@compass.com.