About 400 Prospect Avenue
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.
Features of 400 Prospect Avenue
| MLS® # | AR26161408 |
|---|---|
| Price | $1,990,000 |
| Bedrooms | 6 |
| Bathrooms | 4.00 |
| Full Baths | 4 |
| Square Footage | 4,208 |
| Lot Size | 10,451 |
| Year Built | 1946 |
| Type | Residential |
| Sub-Type | Duplex |
| Style | Traditional |
| Status | Active |
| # Of Units | 2 |
Community Information
| Address | 400 Prospect Avenue |
|---|---|
| Area | 639 - Monrovia |
| City | Monrovia |
| County | Los Angeles |
| Zip Code | 91016 |
Amenities
| Parking Spaces | 3 |
|---|---|
| Parking | Driveway, Garage, Detached Carport |
| # of Garages | 2 |
| Garages | Driveway, Garage, Detached Carport |
| View | Neighborhood |
| Is Waterfront | No |
| Has Pool | No |
| Pool | None |
Interior
| Interior Features | Eat-in Kitchen, In-Law Floorplan, Storage, Bedroom on Main Level |
|---|---|
| Heating | Central |
| Cooling | Central Air |
| Has Basement | No |
| Fireplace | No |
| Fireplaces | None |
| # of Stories | 2 |
| Stories | Two |
Exterior
| Lot Description | Back Yard, Corner Lot, Front Yard, Lawn, Landscaped |
|---|
School Information
| District | Monrovia Unified |
|---|
Additional Information
| Date Listed | July 23rd, 2026 |
|---|---|
| Days on Market | 70 |
| Foreclosure | No |
| Short Sale | No |
| RE / Bank Owned | No |
Listing Details
| Agent | Peter Kam |
|---|---|
| Office | High Ten Partners, Inc. |