Active
4 beds3,035 sqft

10010 Shadow Rd, La Mesa, CA 91941

Single FamilyProperty Type
1.04 acresLot Size
1961Year Built
$708/sq ftPrice per sq ft
12 carsParking Spaces

Description

The historically designated Casady Home is a rare example of single-level Southern California Mid-Century Modern architecture, set at the end of a private Mount Helix road and benefiting from substantial Mills Act tax savings. Designed by acclaimed architect Art Decker in 1961 and built by noted Mid-Century craftsman John Mortenson, the home was later purchased by Decker himself, who lived there for more than five decades. Original architectural details, custom millwork, extensive built-in storage,...The historically designated Casady Home is a rare example of single-level Southern California Mid-Century Modern architecture, set at the end of a private Mount Helix road and benefiting from substantial Mills Act tax savings. Designed by acclaimed architect Art Decker in 1961 and built by noted Mid-Century craftsman John Mortenson, the home was later purchased by Decker himself, who lived there for more than five decades. Original architectural details, custom millwork, extensive built-in storage, walls of glass, and seamless indoor-outdoor flow remain remarkably intact, complemented by thoughtful modern updates including custom cabinetry, high-end appliances, premium fixtures, and a permitted office/flex space.
Listing Agents
  1. Ryan Ponce

    Ryan Ponce

    Listing Agent

    Compass

    DRE #01902950

    P: (619) 228-6790

    M: (619) 228-6790

  2. Karl Bublitz

    Karl Bublitz

    Alternative Listing Agent

    Compass

    DRE #01999695

    P: (240) 461-7361

    M: (240) 461-7361

Days on Market Listed Today
Last updated: 10/08/2026 08:19 AM • Source: SDMLS, MLS#: 260024430

Location

Listing Courtesy of Compass, Ryan Ponce, DRE #01902950; Compass, Karl Bublitz, DRE #01999695
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$11,827 per month

30 year fixed, 7.03% Interest

Principal and Interest

$11,478

Property Taxes

$349

HOA Dues

$0

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Property Information for 10010 Shadow Road

Property Details

  • MLS Type: Residential / Single Family Residence
  • Architectural Style: Other, See Remarks
  • Neighborhood: Mount Helix
  • Community: MOUNT HELIX
  • View: Evening Lights, Mountains/Hills, Valley/Canyon, Trees/Woods, City Lights
  • Zoning: SPECIAL AN
  • Parking Garage: None Known
  • Garage Spaces: 0.0
  • Area Zip: LA MESA (91941)
  • Standard Status: Active

Building Information

  • Stories: 1
  • Year Built: 1961
  • Lot Size: 1.04 AC / 45,302 SF

Summary

Location and General Information
  • Coordinates: -116.978883, 32.777849
  • Latitude: 32.777849
  • Longitude: -116.978883
  • Directions: Cross Street: Grosalia.
  • MLS Area Major: East County
  • Water Source: Available, Meter on Property
Taxes and HOA
  • Association Fee: $0
  • Other Fees: $0
  • CFD Mello Roos Fee: $0
  • Monthly Total Fees: $0
Parking
  • Parking Features: None Known
  • Parking Total: 12.0
  • Parking Non-Garage Spaces: 12.0

Property

Lot Information
  • Building Area Total: 3035.0
  • Building Area Units: Sqft
  • Living Area: 3035
  • Living Area Units: Sqft
  • Lot Features: Sprinklers Drip System, Sprinkler System
  • Lot Size Area: 1.04
  • Lot Size Square Feet: 45302.0
  • Lot Size Units: Acres
  • Lot Size: 1+ to 2 AC
  • Exclusive Use Yard: Yes
Property and Assessments
  • Parcel Number: 491-400-25-00
  • Property Sub Type: Detached
  • Property Type: Residential
  • Age Restrictions: N/K
  • Disclosures: Historical, Principal is RE Licensed
  • Property Condition: Updated/Remodeled
  • Prop Restrictions Known: None Known
  • Ownership: Fee Simple
  • Site: Private Street
  • Telecommunications: Other/Remarks
  • ADUYes No: No
  • Year Built Source: Assessor
  • Jurisdiction: Unincorporated
  • Year Built: 1961
Farm Information
  • Irrigation Source: Automatic, Drip, Sprinklers
Utilities
  • Sewer: Septic Installed, Electricity Connected, Natural Gas Connected, Water Connected
  • Utilities: Electricity Connected, Natural Gas Connected, Water Connected
  • Heat Source: Electric
  • Water Heater Type: Other/Remarks

Interior and Exterior Features

Exterior Features
  • Construction Materials: Wood
  • Fencing: Partial
  • Fireplace Features: FP in Living Room
  • Patio And Porch Features: Deck
  • Pool Features: N/K
  • Pool Heat: N/K
  • Roof: Membrane
  • Other Structures: N/K, Mountainous
  • Security Features: Other/Remarks, Security System, Security Lights
  • Structures: Greenhouse, N/K, Mountainous
Interior Features
  • Appliances: Dishwasher, Disposal, Dryer, Microwave, Refrigerator, Solar Panels, Washer, Freezer, Gas Oven, Ice Maker, Range/Stove Hood, Gas Range, Gas Cooking
  • Bathrooms Full: 3
  • Bathrooms Half: 0
  • Fireplace: Yes
  • Fireplaces Total: 1
  • Stories Total: 1
  • Searchable Rooms: Bedroom Entry Level, Bonus Room, Den, Dining Area, Prim BR Entry Level, Office, Optional Bedrooms, Storage Room, Workshop, Kitchen, Living Room, Primary Bedroom, Entry, Gym, Laundry, Primary Bathroom
  • Bedrooms Possible: 4
  • Cooling: Central Forced Air, Zoned Area(s)
  • Flooring: Tile, Wood
  • Heating: Zoned Areas, Forced Air Unit
  • Interior Features: Built-Ins, High Ceilings (9 Feet+), Living Room Deck Attached, Remodeled Kitchen
  • Laundry Features: Other/Remarks
  • Levels: 1 Story
  • Room Type: Primary Bedroom, Primary Bathroom, Den, Bonus Room, Laundry, Main Floor Primary Bedroom, Main Floor Bedroom, Office, Living Room, Workshop, Entry, Kitchen
  • Spa Features: N/K
  • Bedrooms Count: 3
  • Optional Bedrooms: 1
  • Baths Total: 3.0

Room

Room Information
  • Primary Bed Area: 15x12
  • Bed2Area: 13x11
  • Bed3Area: 23x13
  • Bed4Area: 12x8
  • Dining Room Area: 12x12
  • Family Room Area: NA
  • Kitchen Area: 20x12
  • Living Room Area: 26x19
  • Ext1Area: 30x14

Agent

Showing and Remarks
  • Supplement Remarks: Commissioned by Si Casady and designed by acclaimed architect Art Decker in 1961, the Casady Home represents an unusually personal chapter in Decker’s work. He later purchased the residence himself and lived in it for more than five decades, preserving the home and its original architectural character with remarkable care. Built by respected Mid-Century craftsman John Mortenson, the residence reflects the era’s emphasis on clean horizontal lines, expansive glass, custom woodwork, built-in storage, and a strong connection between the interior and surrounding landscape. The home’s single-level floor plan was carefully organized to create a natural separation between gathering spaces and private quarters while maintaining views and outdoor connections throughout. Set against a gentle hillside and surrounded by mature olive trees, coastal oaks, and eucalyptus, the property feels exceptionally private and removed from its surroundings. City lights, distant mountains, mature landscaping, and changing sunsets are framed from multiple rooms and outdoor areas. Updates have been made with sensitivity to the original architecture, including custom cabinetry, high-end appliances, premium fixtures, and a fully permitted office/flex space designed to complement the home’s existing forms rather than imitate its history. Much of the original detailing remains intact, giving the residence a level of authenticity that is increasingly difficult to find in Mid-Century homes. The property also benefits from an official Mills Act historical designation, with current annual property taxes of approximately $4, 200. This provides a meaningful long-term ownership advantage while supporting the preservation of the home’s historic character. Energy improvements include 22 owned solar panels on NEM 2.0, along with additional panels under a power purchase agreement. Despite its secluded setting, the property remains convenient to major freeways, shopping, dining, and La Mesa Village. The combination of architectural significance, privacy, preserved design, views, modern updates, and substantial tax advantages makes the Casady Home a truly distinctive offering in Mount Helix.

Rental

Rent Information
  • Pets Allowed: Yes

Property History for 10010 Shadow Road

DateEvent & SourcePriceAppreciation
Oct 8, 2026

Listed (Active)

CRMLS #260024430SD

$2,150,000—
Oct 8, 2026

Listed (Active)

CLAW #260024430SD

$2,150,000—
Oct 7, 2026

Listed (Active)

SDMLS #260024430

$2,150,000—
DateEvent & SourcePrice
10/08/2026

Listed (Active)

CRMLS #260024430SD

$2,150,000
10/08/2026

Listed (Active)

CLAW #260024430SD

$2,150,000
10/07/2026

Listed (Active)

SDMLS #260024430

$2,150,000

For completeness, we often displays two records for one sale: the MLS record and the public record.

Public records

10010 Shadow Road

Beds

3

Baths

3

Total Finished SqFt

2,570 SqFt

Above Grade Finished SqFt

2,570 SqFt

Lot Size

45,302 SqFt

Style

Single Family Residence

Schools near 10010 Shadow Road

This home is within Cajon Valley Union School District.
Rating
School
Type
Grades
Distance
Public - K to 6
Public - 6 to 8
Public - 9 to 12
Charter - K to 5
Rating
School
Distance
Chase Avenue Elementary School
PublicK to 6

Cajon Valley Middle School
Public6 to 8

Grossmont High School
Public9 to 12

Eje Elementary Academy Charter
CharterK to 5

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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10010 Shadow Road is a single family home for sale in La Mesa, CA 91941. This listing's school districts are Cajon Valley Union School District, Grossmont Union High School District. Nearby schools include Chase Avenue Elementary School, Cajon Valley Middle School and Grossmont High School. 10010 Shadow Road is a 4-bed, 3-bath, 3,035 sqft single family home built in 1961.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of any information, descriptions or measurements (including square footage measurements and property condition), such should be independently verified through appropriate means, including, but not limited to, in person inspection and public records, and Compass International Holdings, its subsidiaries, affiliates and independently owned and operated franchisees, and their affiliated agents and associated third parties expressly disclaim any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the seller's discretion. No financial or legal advice provided. Equal Housing Opportunity.

Listing Courtesy of Compass, Ryan Ponce, DRE #01902950; Compass, Karl Bublitz, DRE #01999695

This information is deemed reliable but not guaranteed. You should rely on this information only to decide whether or not to further investigate a particular property. BEFORE MAKING ANY OTHER DECISION, YOU SHOULD PERSONALLY INVESTIGATE THE FACTS (e.g. square footage and lot size) with the assistance of an appropriate professional. You may use this information only to identify properties you may be interested in investigating further. All uses except for personal, non-commercial use in accordance with the foregoing purpose are prohibited. Redistribution or copying of this information, any photographs or video tours is strictly prohibited. This information is derived from the Internet Data Exchange (IDX) service provided by SDMLS®. Displayed property listings may be held by a brokerage firm other than the broker and/or agent responsible for this display. The information and any photographs and video tours and the compilation from which they are derived is protected by copyright. Compilation © 2026 SDMLS®, Inc.