19950 Onaknoll
Lake Mathews, CA, 92570
$1,590,000
4 Beds
5 Baths
3,110 SqFt
2.29 Acres
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MLS #SW26146463 image #0
A true private resort unlike anything available in Lake Mathews! Situated on 2.29 acres on one of the area’s premier view lots with breathtaking panoramic views of Lake Mathews, this extraordinary estate features an approx. 2,560 sq. ft. 3-bedroom plus office/den main residence and an approx. 550 sq. ft. detached ADU/guest house, offering over 3,100 sq. ft. of combined living space.

The remodeled interior showcases vaulted ceilings with exposed wood beams, a chef’s kitchen with custom shaker cabinetry, quartz countertops, oversized island, premium stainless steel appliances, professional-grade gas range, designer hood, remodeled laundry room, and a spa-inspired primary bath with a custom walk-in tile shower and frameless glass enclosure. The detached ADU/guest house includes a bedroom, full bath, and kitchenette, making it ideal for multigenerational living, guest accommodations, rental income, or potential Airbnb use.

The backyard is an entertainer’s dream, highlighted by an approx. 80,000-gallon resort-style pool with an oversized elevated spa, waterfalls, Baja shelves, tanning ledges, illuminated water features, and dramatic fire bowls. The covered pavilion features a grand fireplace, built-in TV, refrigerator, serving bar, and lounge area overlooking the pool and lake. A custom BBQ station, multiple pergolas, covered outdoor dining, lake-view fire pit lounge, private courtyard with water feature, lush lawns, mature landscaping, walking paths, and a custom playground complete this incredible outdoor retreat.

An approx. 20′ x 70′ detached workshop with gated access provides covered space for RVs, boats, collector cars, equipment, hobbies, or a home business. A second workshop, paid solar, Tesla EV charger, expansive concrete parking, and approx. one acre of flat usable land offer endless possibilities for toys, additional structures, equestrian amenities, or another ADU.

Located in unincorporated Riverside County, this unique property offers potential for a short-term vacation rental (Airbnb), private retreats, reunions, and special events. Rarely does a property combine panoramic lake views, a detached ADU, resort-style amenities, massive workshop space, usable acreage, and unmatched entertaining into one unforgettable estate.

Property Details

Price:
$1,590,000
MLS #:
SW26146463
Status:
Active
Beds:
4
Baths:
5
Type:
Single Family
Subtype:
Single Family Residence
Neighborhood:
srcarsouthwestriversidecounty
Listed Date:
Jul 8, 2026
Finished Sq Ft:
3,110
Lot Size:
99,752 sqft / 2.29 acres (approx)
Year Built:
1960
PoolSrcar – Southwest Riverside CountySrcarsouthwestriversidecountyCorona-norco UnifiedWoodrow WilsonSantiagoPool

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Schools

School District:
Corona-Norco Unified
Elementary School:
Woodrow Wilson
High School:
Santiago

Interior

Appliances
MW, RF, GR, HOD, TW
Bathrooms
4 Full Bathrooms, 1 Half Bathroom
Cooling
CA, WW
Flooring
TILE
Heating
PRO, CF, FIR
Interior Features
BI, CF, BC, QTZC
Laundry Features
STK
Levels
A
Main Level Bathrooms
4
Main Level Bedrooms
4

Exterior

Common Walls
NCW
Community Features
FHL, MTN, BIKI
Fencing
VNL
Garage Spaces
2
Other Structures
SHP, GHD
Parking Spots
9
Parking Total
9
Patio And Porch Features
CON, CO, PTO
Spa Features
PVT, SH
View
HI, LA, MT, PA, PL
Window Features
DPW

Financial

Map

Community

Market Summary

Current real estate data for Single Family in Lake Mathews as of Jul 13, 2026
10
Single Family Listed
68
Avg DOM
418
Avg $ / SqFt
$1,630,100
Avg List Price

Property Summary

    19950 Onaknoll Lake Mathews CA is a Single Family for sale in Lake Mathews, CA, 92570. It is listed for $1,590,000 and features 4 beds, 5 baths, and has approximately 3,110 square feet of living space, and was originally constructed in 1960. The current price per square foot is $511. The average price per square foot for Single Family listings in Lake Mathews is $418. The average listing price for Single Family in Lake Mathews is $1,630,100.

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19950 Onaknoll
Lake Mathews, CA