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$1,990,000 -$60,000 (-2.93%) Price Reduced

  • For Sale
  • Active
  • Duplex
  • 6 Beds
  • 4 Full Baths
  • 4,208 Sq. Ft.
  • 2 Car Garage
  • Updated 11 hours ago
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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 for 400 Prospect Ave

General

  • Price: $1,990,000
  • Status: Active
  • Type: Duplex
  • Source: MRMLS
  • MLS ID: AR26161408
  • Updated: 9/16/2026
  • Days on Market: 56 days
  • Added to Site: 56 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.: $472.91

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

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 400 Prospect Ave

School District:Monrovia Unified School District
NameGradesDistance
Wild Rose Elementary School
232 Jasmine Avenue, Monrovia, CA 91016
K-50.6 mi
Clifton Middle School
226 South Ivy Avenue, Monrovia, CA 91016
6-80.6 mi
Monrovia High School
845 West Colorado Boulevard, Monrovia, CA 91016
9-121.6 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 Get Price Alerts and Save Property

Date
Details
Price
Change
Source
9/16/2026
Price Reduced
$1,990,000
-2.93%
MLS
7/23/2026
Listed
$2,050,000
—
MLS
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 400 Prospect Ave

Year
Property Taxes
Change
Tax Assessment
Change
2025
$13,309
—
$978,886
2%
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
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

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*These costs are estimates, and the interest rates assume exceptional credit standing.

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Listed by High Ten Partners, Inc., Peter Kam

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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 $1,990,000 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.

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