1578 San Bernardino, Costa Mesa
Homes Over 3000 Sq Ft For Sale in Costa Mesa
Homes over 3,000 square feet in Costa Mesa are concentrated on the Eastside and in Mesa Verde, typically priced from $1.5M to over $3M for newer custom builds. I track this inventory as part of my weekly Orange County housing report and can tell you what is active, what just went pending, and what similar homes have sold for. Call or text any time: 949-430-7500
Where Large Homes Are Found in Costa Mesa
Costa Mesa's over-3,000 square foot inventory is driven primarily by the teardown and rebuild activity that has transformed the Eastside neighborhoods adjacent to Newport Beach over the past two decades. Custom and semi-custom homes in this tier are now common on the Eastside, where older mid-century homes on generous lots have been replaced by two and three-story contemporary builds that maximize the available square footage. These homes are typically built to a high standard with open floor plans, premium finishes, and indoor-outdoor living spaces that define the central OC coastal aesthetic.
The Eastside is roughly the section of Costa Mesa east of Newport Boulevard, bordering Newport Beach directly. Lot sizes here are typically 6,000 to 8,000 square feet, which supports the two and three-story footprints needed to reach 3,000 square feet and above. Buyers who want a large custom home with Newport Beach adjacency at a price point below the Newport premium consistently find the best value on the Eastside.
In Mesa Verde and the College Park neighborhoods, original homes rarely reached 3,000 square feet in original construction, but a meaningful number of properties have been expanded through additions. Buyers in these neighborhoods should assess any addition carefully, as the quality of expansion work varies and how well it integrates with the original structure matters both functionally and for long-term resale. Costa Mesa is served by Newport-Mesa Unified School District, which is consistently one of the stronger unified districts in Orange County.
Market Context for Large Home Buyers in Costa Mesa
The Costa Mesa Eastside consistently delivers the strongest demand for large custom homes in the city, driven by buyers who want Newport Beach adjacency at a price point that remains below the Newport premium. The value gap between a comparable custom build on the Eastside versus the Newport Beach side of the same street can be $500,000 to $1M, purely on the basis of the city address. For buyers flexible on that distinction, the Eastside is one of the better large-home values in coastal OC.
New construction and recently completed custom builds in the over-3,000 square foot tier sell efficiently when priced to the market and presented well. Well-located Eastside homes do not typically sit long, and buyers competing for the best product in this segment should be pre-approved and ready to move. For current median prices, active inventory, and recent sales, see the live Costa Mesa market report.
Frequently Asked Questions
What is the Costa Mesa Eastside?
The Eastside is the portion of Costa Mesa that borders Newport Beach, roughly east of Newport Boulevard. It has the city's highest concentration of large custom homes, the result of two decades of teardown and rebuild activity on the original mid-century lots. Buyers who look at Newport Beach custom homes and find the price difficult often find comparable products on the Eastside for meaningfully less, with the primary difference being the city address.
How much less is a Costa Mesa Eastside home vs. a comparable Newport Beach home?
The address premium is real and consistent. A 3,200 square foot custom home on the Costa Mesa Eastside built to the same standard and on a comparable lot as one just across the city line in Newport Beach will typically price $500,000 to $1M lower. The construction quality, finish level, and lifestyle are nearly identical. The difference is the Newport Beach ZIP code, which matters to some buyers and not at all to others.
What school district serves Costa Mesa?
Costa Mesa is served by Newport-Mesa Unified School District. Estancia High School and Costa Mesa High School serve different parts of the city. The district is one of the stronger unified districts in Orange County, and Eastside buyers in particular often note that their children can attend the same schools as Newport Beach kids given the overlapping district boundaries in that area.
Is it better to buy a new custom build or an expanded original home in Costa Mesa?
For most buyers at this size tier, a purpose-built custom home on the Eastside is the stronger choice. Additions and expansions on original Mesa Verde and College Park homes vary widely in quality, and a poorly integrated addition can affect livability, resale appeal, and lender perception. New and recently completed custom builds on the Eastside come with warranties, predictable maintenance profiles, and floor plans specifically designed for the square footage rather than retrofitted around an existing structure.
Selling a Luxury Home in Costa Mesa?
The Costa Mesa Eastside custom home market operates at the intersection of Costa Mesa and Newport Beach pricing, and getting a large custom home valued correctly here requires understanding both markets simultaneously. Automated valuations routinely undervalue Eastside custom builds because the algorithm anchors on the Costa Mesa address rather than recognizing the Newport-adjacent product quality and demand. The result is a starting number that leaves money on the table for sellers who rely on it.
Orange County Real Estate, Inc. is based in Costa Mesa, and Eric Engelbert has been tracking the Eastside custom home market through every cycle for years. He brings firsthand knowledge of what buyers are paying on both sides of the city line, which comparable transactions are the most relevant, and how to position a large Costa Mesa custom home to attract the Newport-quality buyer who is specifically looking for the value this market offers.
If you are considering selling a large custom home in Costa Mesa, a private valuation consultation grounded in the actual Eastside market is the right starting point.
Compare Large Homes in Nearby Communities
Buyers comparing Costa Mesa often also look at these neighboring communities, where large custom homes are available at different price points and coastal proximity levels:
Open Houses in Costa Mesa
Walking through large homes in person is the only reliable way to understand how the square footage is distributed and whether a floor plan works for how your family actually lives. See the current weekend open house schedule for Costa Mesa and plan your tours.
Ready to Find a Large Home in Costa Mesa?
Eric Engelbert is an Orange County real estate broker who tracks every city and every size tier through weekly market reports. Get expert guidance on current pricing, which communities offer the best value at your target square footage, and how to compete effectively before you make an offer.
Last updated: June 2026
Costa Mesa Homes over 3,000 Sq. Ft. for Sale
Based on information from California Regional Multiple Listing Service, Inc. as of . This information is for your personal, non-commercial use and may not be used for any purpose other than to identify prospective properties you may be interested in purchasing. Display of MLS data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and should investigate the data themselves or retain appropriate professionals. Information from sources other than the Listing Agent may have been included in the MLS data. Unless otherwise specified in writing, Broker/Agent has not and will not verify any information obtained from other sources. The Broker/Agent providing the information contained herein may or may not have been the Listing and/or Selling Agent.