For sale

Listed by: High Ten Partners, Inc. • Shumei Kam • Contact: 626-202-6446

$2,050,000

400 Prospect Ave, Monrovia, CA 91016

6beds

4,208sqft

$13,055/mo

Get pre-qualified

Duplex

Built in 1946

10,451 Square Feet Lot

$1,997,300 Zestimate^®

$487/sqft

$-- HOA

What's special

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.

28 days

277

5

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 6
Bathrooms: 4
Full bathrooms: 4
Main level bathrooms: 2
Main level bedrooms: 2

Rooms

Room types: Bedroom, Den, Family Room, Kitchen, Laundry

Bedroom

Features: Bedroom on Main Level

Heating

Central

Cooling

Central Air

Appliances

Laundry: Inside, Laundry Room

Features

Eat-in Kitchen, In-Law Floorplan, Storage, Bedroom on Main Level
Has fireplace: No
Fireplace features: None
Common walls with other units/homes: No Common Walls

Interior area

Total interior livable area: 4,208 sqft

Property

Parking

Total spaces: 3
Parking features: Detached Carport, Driveway, Garage
Garage spaces: 2
Carport spaces: 1
Covered spaces: 3

Features

Levels: Two
Stories: 2
Entry location: Front
Patio & porch: Covered, Patio
Pool features: None
Spa features: None
Has view: Yes
View description: Neighborhood

Lot

Size: 10,451 Square Feet
Dimensions: 125 x 83.5
Features: Back Yard, Corner Lot, Front Yard, Lawn, Landscaped

Details

Parcel number: 8518020043
Special conditions: Standard

Construction

Type & style

Home type: SingleFamily
Architectural style: Traditional
Property subtype: Duplex

Condition

New construction: No
Year built: 1946

Details

Builder model: 2

Utilities & green energy

Sewer: Public Sewer
Water: Public

Community & HOA

Community

Features: Curbs, Suburban, Sidewalks

Location

Region: Monrovia

Financial & listing details

Price per square foot: $487/sqft
Tax assessed value: $978,886
Date on market: 7/23/2026
Cumulative days on market: 28 days
Listing terms: Cash,Conventional

Estimated market value

$1,997,300

$1.90M - $2.10M

$6,325/mo

Price history

Date	Event	Price
7/24/2026	Listed for sale	$2,050,000+203.7%$487/sqft
Source: CRMLS #AR26161408 Report a problem
5/28/2015	Listing removed	$2,980$1/sqft
Source: Dilbeck Real Estate #315001869 Report a problem
4/24/2015	Listed for rent	$2,980-19%$1/sqft
Source: Dilbeck Real Estate #315001869 Report a problem
3/19/2015	Listing removed	$3,680$1/sqft
Source: Dilbeck Realtors #315001869 Report a problem
3/12/2015	Listed for rent	$3,680+106.7%$1/sqft
Source: Dilbeck Realtors #315001869 Report a problem
1/11/2014	Listing removed	$1,780
Source: Dilbeck REALTORS #213001446 Report a problem
11/26/2013	Price change	$1,780-8.7%
Source: Dilbeck REALTORS #213001446 Report a problem
10/26/2013	Listed for rent	$1,950
Source: Dilbeck Realtors #213001446 Report a problem
8/13/2003	Sold	$675,000$160/sqft
Source: Public Record Report a problem

Public tax history

Year	Property taxes	Tax assessment
2026	--	$978,886 +2%
2025	$13,309 +2.2%	$959,693 +2%
2024	$13,023 +2.7%	$940,876 +2%
2023	$12,679 +3%	$922,428 +2%
2022	$12,313 +2.1%	$904,342 +2%
2021	$12,058 +3.1%	$886,611 +1%
2020	$11,691	$877,521 +2%
2019	$11,691 +4.6%	$860,316 +2%
2018	$11,178	$843,448 +2%
2017	$11,178 +2%	$826,910 +2%
2016	$10,963 +2.3%	$810,697 +1.5%
2015	$10,720 +3.3%	$798,520 +2%
2014	$10,380	$782,879 +2.5%
2012	--	$764,062 +2%
2011	--	$749,081 +0.8%
2010	--	$743,484 -0.2%
2009	--	$745,252 +2%
2008	--	$730,640 +2%
2007	--	$716,315 +2%
2006	--	$702,270
2005	--	$702,270 +4%
2004	--	$675,000 +89.2%
2003	--	$356,824 +2%
2002	--	$349,828 +4%
2000	--	$336,245