604 Knowell, Costa Mesa, CA 92627
- 3 beds
- 2 baths
- 1,706 sq ft
- 6,032 sq ft lot
- Built 1954
Open house
Open Houses
The home
About 604 Knowell
For the first time ever, 604 Knowell Pl comes to market. This single-story Westside Costa Mesa home offers approximately 1,706 square feet of living space on a generously sized 6,098 square foot lot, with room to garden, entertain, expand or simply breathe.
A white picket fence and covered front porch set a welcoming tone. Inside, the living, dining and kitchen areas flow together in an open layout with wood-look flooring and ceiling fans. The kitchen features wood cabinetry, dark countertops, a cooktop and a wall oven, with a separate laundry room just off the hall. Including a primary bedroom with an attached bathroom featuring a bathtub and a separate glass-enclosed shower.
French doors open to a brick-step patio and a sweeping backyard with lawn, a metal storage shed, block and vinyl fencing, and potted plant areas, with plenty of space left to make your own.
The location is hard to match. Newport Pier is approximately 3.6 driving miles away, with Huntington Beach Pier approximately 6 miles. Fairview Park, with 208 acres and about 7 miles of trails, is approximately 1.7 miles away, and Triangle Square is approximately 1 mile. The LAB, The CAMP and South Coast Plaza are approximately 4 to 5 miles, Segerstrom Center for the Arts approximately 5 miles, and the OC Fair and Event Center approximately 2.4 miles. The SR-55 freeway is approximately 1.5 miles away and John Wayne Airport approximately 7 miles. Served by Newport-Mesa Unified School District.
A first-time offering on a lot this size does not come along often. Come see the possibilities.
Property details for 604 Knowell
This 3-bedroom, 2-bath single-family home sits in the Westside Costa Mesa Central neighborhood of Costa Mesa in Orange County. It has 1,706 square feet of living space on a 6,032-square-foot lot and is listed at $1,299,999, about $762 per square foot. The home was built in 1954. The MLS record lists the assessor parcel number as 422-131-23. Highlights include single-story living, a two-car garage, and central air.
Photographs
Photos of 604 Knowell, Costa Mesa
Specifications
Home Details
General Features
- Property Type
- Single Family Residence
- MLS Number
- OC26232272
- Year Built
- 1954
- Living Area (sq ft)
- 1,706
- Living Area Source
- Assessor
- Lot Size (sq ft)
- 6,032
- Lot Size (acres)
- 0.1385
- Levels
- One
- Bedrooms
- 3
- Full Baths
- 2
- Garage Spaces
- 2
- Parking Spaces
- 2
- View
- None
- Parcel Number
- 42213123
- On Market Date
- 2026-10-28
- Listing Terms
- Standard
Interior Features
- Interior Features
- Eat In Kitchen, Granite Counters, Walk In Closets
- Appliances
- Dishwasher, Refrigerator
- Flooring
- Laminate
- Heating
- Central
- Cooling
- Central Air
- Fireplace
- None
- Laundry
- Inside, Laundry Closet
- Main Level Bedrooms
- 3
- Main Level Bathrooms
- 2
- Entry Level
- 1
- Common Walls
- No Common Walls
- Windows
- Double Pane Windows
- Accessibility
- None
- Rooms
- Other, Bathroom, Kitchen, Living Room
Exterior Features
- Lot Features
- Back Yard, Front Yard
- Patio and Porch
- Front Porch
- Parking
- Garage
- Pool Features
- None
- Spa
- None
- Sewer
- Public Sewer
- Water
- Public
- Utilities
- None
- Units
- 1
Community Features
- Subdivision
- Westside Costa Mesa Central (WCMC)
- Community Features
- Biking, Curbs, Sidewalks
The record
Property History for 604 Knowell
| Date | Event | Price | Note |
|---|---|---|---|
| Oct 28, 2026 | Status changed to Active | From Coming Soon | |
| Oct 28, 2026 | Listed for sale | $1,299,999 |
No prior MLS sales on record for this home since 2012.
Cost of ownership
Estimated monthly payment
7.32% · 30-yr fixed$
$10,203/mo
10% down · 30-year fixed · $130,000 down
Principal & interest$8,037
Mortgage insurance (est., over 80% LTV)$487
Property tax (est. 1.2%)$1,300
Home insurance (rough est., varies widely)$379
HOANot reported, not included
$8,823/mo
20% down · 30-year fixed · $260,000 down
Principal & interest$7,144
Property tax (est. 1.2%)$1,300
Home insurance (rough est., varies widely)$379
HOANot reported, not included
$7,930/mo
30% down · 30-year fixed · $390,000 down
Principal & interest$6,251
Property tax (est. 1.2%)$1,300
Home insurance (rough est., varies widely)$379
HOANot reported, not included
Estimated carrying cost
$1,679/mo
All cash · taxes and insurance only
Principal & interestNone (cash purchase)
Property tax (est. 1.2%)$1,300
Home insurance (rough est., varies widely)$379
HOANot reported, not included
Estimate only, not a loan offer or quote. Principal and interest use the Freddie Mac 30-year fixed average of 7.32% (week of Oct 22, 2026); your rate will differ. A loan this size is typically a jumbo loan, which prices differently. Tax and insurance are modelled, not billed amounts; tax uses a typical Costa Mesa rate, excluding Mello-Roos. Verify all figures. Full assumptions and disclosures.
Next steps
Buying 604 Knowell
Want to see 604 Knowell in person? We have guided buyers through Westside Costa Mesa Central and the wider Costa Mesa market since 1983. Call to arrange a private tour, or send a note and we'll follow up.
Selling near 604 Knowell
Thinking of selling nearby? We bring current Westside Costa Mesa Central sales data and a clear pricing strategy to every listing, backed by more than 700 closed sales and over $1B in Orange County volume. Start with a free home valuation, or reach out to talk through your options.
The neighborhood
About Costa Mesa
Costa Mesa sits on the coastal tableland of central Orange County, bordered by Santa Ana, Huntington Beach, and Newport Beach, with its southern edge about a mile from the Pacific. South Coast Plaza, the Segerstrom Center for the Arts, the Orange County Fairgrounds, Orange Coast College, and the Eastside and Mesa Verde neighborhoods all fall within the Newport-Mesa Unified School District.
Costa Mesa home sales, past 12 months
- Homes sold
- 435
- Median price
- $1,650,000
- Median days on market
- 11
- Median per sq ft
- $962
Recorded MLS closings of single-family homes, Oct 21, 2025 to Oct 21, 2026. Days on market run from listing to going under contract.
Price per square foot against recent Costa Mesa sales
At $762 per square foot, this home's asking price is 21% below the Costa Mesa median of $962 for single-family homes that closed in the past 12 months.
Recent Costa Mesa sales
| Address | Closed | Price | Sq ft | Per sq ft | Days on market |
|---|---|---|---|---|---|
| 3140 Coolidge Avenue | Oct 21, 2026 | $1,260,000 | 1,683 | $749 | 115 |
| 316 Hamilton | Oct 20, 2026 | $1,200,000 | 1,738 | $690 | 61 |
| 944 W Wilson | Oct 20, 2026 | $1,065,000 | 1,380 | $772 | 0 |
| 1091 STONE BROOK Lane | Oct 19, 2026 | $960,000 | 1,583 | $606 | 28 |
| 1598 Baker Street | Oct 19, 2026 | $1,501,000 | 2,047 | $733 | 11 |
Schools
Schools for 604 Knowell
As listed in the MLS record. Confirm attendance boundaries with the school district.
- High
- Estancia
- District
- Newport Mesa Unified
Living in Costa Mesa covers its schools, parks and beaches.
Location
Location
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Listed by Regina Cuervo of Nest Realty
Listing information updated Oct 28, 2026 at 12:36 AM PT. Source: CRMLS.
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. The 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, the 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.