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555 Sierra Madre Boulevard, San Marino, CA 91108

$4.00M6bd · 6ba · 4,307 sqft
Lot 12,826 sqft•Single Family Residence•
Active
•25d on market•MLS# WS-26202630

Property Description

Exceptional space, flexibility, and value in one of San Marino’s most desirable north-side neighborhoods. Offering approximately 4,300 sq. ft. of total living space, this extensively remodeled property includes a 3,500 sq. ft. main residence with 4 bedrooms and 4 bathrooms, plus a brand-new 800 sq. ft. detached ADU with 2 bedrooms, 2 bathrooms, a full kitchen, and living room—ideal for extended family, guests, a home office, or independent living. Set on an approximately 12,826 sq. ft. lot, the main home blends classic San Marino character with thoughtful updates. The formal dining room opens to an updated gourmet kitchen with granite countertops, newer Frigidaire appliances, and a bright breakfast room. Three spacious bedroom suites are located on the main level, while the second floor features a private master bedroom suite with retreat/loft. Multiple living areas provide excellent space for entertaining, relaxing, and everyday living. The newly completed ADU is a standout feature, functioning as a truly independent residence and adding exceptional versatility to the property. Outside, redesigned landscaping surrounds the home with mature greenery and flowering plants, while one expansive rear patio are perfect for outdoor dining, barbecues, and entertaining. A fully paid solar system adds energy efficiency and long-term savings. Ideally located in north San Marino near The Huntington Library, Art Museum, and Botanical Gardens, the home is also convenient to local schools, parks, shopping, dining, and other community amenities. With 6 bedrooms, 6 bathrooms, approximately 4,300 sq. ft. of total living space, a new ADU, extensive upgrades, and paid solar, 555 Sierra Madre Blvd offers a rare combination of space, flexibility, and value in San Marino.

Features & Amenities

FeeBuilt 1925

Property Details

Land Type
Fee
Year Built
1925
Property Type
Residential
Property Subtype
Single Family Residence
Parking Spaces
2
Garage Spaces
2
Heating
Central
Cooling
Central Air
View
None
Flooring
Laminate, Wood
Roof
Shingle
City
San Marino
Zip Code
91108
County
Los Angeles
Listed byUnknown Office, CHEN DONG

Mortgage Calculator

Current Rates

$
$
%
Monthly Payment
$20,221.12
Principal & Interest
Loan Amount
$3,199,200
Total Interest
$4,080,403
Total Payment Over 30 Years
$7,279,603
This calculator provides estimates only. Actual mortgage payments may include taxes, insurance, HOA fees, and PMI. Contact a lender for accurate quotes.

Comparative Market Analysis

Luxury Tier · 3 active · 5 closed

555 Sierra Madre Boulevard, San Marino, CA 91108

San Marino · Single Family Residence

$4.00M
Luxury Tier
Beds
6
Baths
6
Sqft
4,307
Lot
12,826 sqft
Year
1925
$/Sqft
$928
Pool: No✓
Spa: No✓
View: None✓
Garage: 2-car✓

Listed in line with the median closed sale of $3,890,450. Price per sqft ($928) is a 10% discount to closed comps ($1,033). Closed comps sold at 108% of list — strong seller's market. Luxury tier — fewer comparable sales widen the confidence range.

Price Position

Aligned with the market — fair pricing for the comps.

At market
Subject listed at $4.00M· $928/sqft
Total list price
Closed comps
vs closed median $3.89M
+$109K (+2.8%)
Active comps
vs active median $3.29M
+$704K (+21.4%)
Price per sqft
Closed compsinsufficient comp data
Active comps
vs active avg $/sqft $1,100
−$172 (−15.6%)

Active Properties (3)

Active Comparables

AddressCityYearBDBTHSqFtLotSzLP/SqFtLPDIMScore
1920 LorainSan Marino1928544,01512,678$821$3.29M1788
2245 CaliforniaSan Marino1930544,02211,058$746$3.00M4083
2170 LombardySan Marino1941564,20426,387$1,732$7.28M16362
Total: 3 · Average5.04.74,080.33316,707.667$1,099.667$4.52M73.33333333333333
Median4,022$3.29M

Closed Properties (5)

Closed Comparables

AddressCityYearDateBDBTHSqFtLotSzLPSPSP/SqFtSP/LPDIMScore
980 Afton RoadSan Marino193907/07/2026653,79714,176$3.33M$3.52M$9281.064586
2850 Wallingford RoadSan Marino195006/03/2026643,77712,065$2.00M$2.73M$7231.377884
1520 Chelsea RoadSan Marino200806/23/2026554,40220,574$5.39M$5.88M$1,3361.093469
685 Chester AvenueSan Marino195105/28/2026554,40123,064$3.98M$3.89M$8840.984365
620 Allen AvenueSan Marino192505/22/2026574,79033,293$6.80M$6.20M$1,2940.915659
Total: 5 · Average5.45.24,233.420,634.4$4.45M$4.45M$1,033—51.2
Median4,401$3.89M$3.89M

Market Analysis

List vs Sale $/SqFt

Sale Price Trend

Days on Market

Sale vs List Price

AI-generated CMA

This analysis was generated automatically from MLS data. For an in-depth, human-reviewed valuation, contact Joseph Sardella at josephsardella@gmail.com.