Date
Details
Price
Change
Source
7/23/2026
Listed
$2,050,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
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1/26
$2,050,000 Just Listed
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Property Description
Rare North Monrovia offering: a 1946 two-story home with two full residences plus a permitted junior ADU, 4,208 sq ft of living space on a 10,451 sq ft corner lot at Prospect Ave and Hill St. The 2,338 sq ft upper residence features three bedrooms, two baths, a spacious family room, and an ante room at its center. The 1,870 sq ft lower residence offers a bedroom, full bath, family room, kitchen with island, dedicated laundry room, and a large storage room. The 455 sq ft junior ADU on the lower level has its own private entrance, kitchen, den, bedroom, and three-quarter bath - ideal for extended stays or rental income. Central heat and air throughout. Outside, the property offers a detached two-car garage, carport, covered patio, and mature landscaping with a fountain. Live in one residence and rent the others, house multiple generations under one roof, or hold as an income property in one of Monrovia's most established neighborhoods, minutes from Old Town and the foothills.
Full Property Details
Full Property Details for 400 Prospect Ave
General
- Price: $2,050,000
- Status: Active
- Type: Duplex
- Source: MRMLS
- MLS ID: AR26161408
- Updated: 7/23/2026
- Added to Site: 1 day(s) ago
Interior
- Rooms/Areas: Laundry, Kitchen, Main Floor Bedroom, Family Room, Den
- Interior Features: Storage, In-Law Floorplan
- Fireplace(s): None
- Eating Areas: In Kitchen
Rooms
Bathrooms
- Total Bathrooms: 4
- Full Bathrooms: 4
Bedrooms
- Total Bedrooms: 6
Other Rooms
- Laundry: Inside, Individual Room
Additional Information
- Pool Description: None
- Spa Description: None
Exterior
- Deck/Patio: Covered, Patio
Parking
- Garage: Yes
- Garage Spaces: 2
- Carport Spaces: 1
- Parking: Garage, Driveway, Detached Carport
Location
- County: Los Angeles
- Driving Directions: Corner of Prospect Ave and Hill St
School Information
- School District: Monrovia Unified
Community
- Community Features: Curbs, Sidewalks, Suburban
Heating & Cooling
- Cooling Type: Central Air
- Heating Type: Central
Utilities
- Sewer: Public Sewer
- Water: Public
Structural Information
- Architectural Style: Traditional
- Structure Type: Duplex
- Common Walls: No Common Walls
- Entry Location: Front
- Stories/Levels: Two
- Stories Description: Two
- Square Feet: 4,208
- Sq. Ft. Source: Assessor
- Year Built: 1946
- Year Built Source: Public Records
Lot Features
- Property View: Neighborhood
- Lot Size (Acres): 0.2399
- Lot Size (Sq. Ft.): 10,451
- Lot Size Source: Assessor
- Lot Dimensions: 125 x 83.5
- Lot Description: Corner Lot, Landscaped, Front Yard, Lot 10000-19999 Sqft, Back Yard, Lawn
Financial Considerations
- Price Per Sq. Ft.: $487.17
Disclosures and Reports
- Special Conditions: Standard
Listed by High Ten Partners, Inc., Peter Kam
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Listing agent
— 400 Prospect Ave —
Peter Kam
High Ten Partners, Inc.
pkamesq@gmail.com
NMLS#: 1598647Get Pre-Approved Today
Schools
Schools serving 400 Prospect Ave
School District:Monrovia Unified School District
| Name | Grades | Distance |
|---|---|---|
Wild Rose Elementary School 232 Jasmine Avenue, Monrovia, CA 91016 | K-5 | 0.6 mi |
Clifton Middle School 226 South Ivy Avenue, Monrovia, CA 91016 | 6-8 | 0.6 mi |
Monrovia High School 845 West Colorado Boulevard, Monrovia, CA 91016 | 9-12 | 1.6 mi |
Disclaimer:
School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.
Price & Sales History for 400 Prospect Ave
Tax History
Tax History for 400 Prospect Ave
Year
Property Taxes
Change
Tax Assessment
Change
2025
$13,309
5%
$959,693
4%
2023
$12,679
3%
$922,428
2%
2022
$12,313
2%
$904,342
2%
2021
$12,058
3%
$886,611
1%
2020
$11,691
2%
$877,521
2%
2019
$11,486
3%
$860,316
2%
2018
$11,178
2%
$843,448
2%
2017
$10,963
2%
$826,910
2%
2016
$10,720
2%
$810,697
2%
2015
$10,487
1%
$798,520
2%
2014
$10,380
—
$782,879
—
2013
$10,335
—
$779,342
—
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
Estimate the Cost
Estimate the Cost for 400 Prospect Ave
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- Single Family
- Active
- Updated 17 hours ago
- 4Beds
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- Updated 1 day ago
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- 9Total Baths
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- Single Family
- Active
- Updated 6 days ago
- 3Beds
- 2Total Baths
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- Active
- Updated 1 day ago
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- Active
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- 4Total Baths
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- Single Family
- Closed
- 4Beds
- 4Total Baths
- 2,667Sq. Ft.
Sold by Darrell Done (CalRE#: 01233781)
400 Prospect Avenue, Monrovia, CA 91016 (MLS# AR26161408) is a Duplex property with 6 bedrooms and 4 full bathrooms. 400 Prospect Avenue is currently listed for $2,050,000 and was received on July 23, 2026. Want to learn more about 400 Prospect Avenue? Do you have questions about finding other Duplex real estate for sale in Monrovia? You can browse all Monrovia real estate or contact a Coldwell Banker agent to request more information.