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We are pleased to present 4503 Castle Lane, a well-located triplex investment opportunity in the highly affluent and supply-constrained community of La Canada Flintridge. Built in 1952, the property offers investors a rare opportunity to acquire a boutique, low-density residential asset in one of the most desirable foothill submarkets in Los Angeles County, known for its strong demographics, top-tier schools, and long-term appreciation fundamentals. The property consists of one (1) one-bedroom/one-bathroom unit measuring approximately 635 square feet and two (2) two-bedroom/one-bathroom units measuring approximately 850 square feet each, providing an attractive balance of affordability and livability for a broad tenant base. The two bedroom units are well-suited for small families or roommates, supporting strong tenant retention and income stability. Select units have been upgraded with new wood flooring, fresh interior paint, updated lighting, and modern finishes. A standout one-bedroom unit features double French doors opening to a spacious private patio and large fenced yard, a rare amenity for multifamily properties in this submarket.Additional interior features include kitchens with granite countertops and maple cabinetry, in-unit washer and dryer connections, porcelain appointed bathrooms, central heating, wall air conditioning, ceiling fans, and ample storage. The property offers covered tuck-under carport parking, additional storage, and a large common deck area.The existing tuck-under parking configuration presents a compelling value-add opportunity to construct an approximately 400-square-foot studio ADU, subject to buyer verification. Under California's current ADU legislation and the City of La Canada Flintridge's local ordinance, this addition could meaningfully increase both unit count and income in a high-barrier-to-entry submarket where new supply is extremely limited.4503 Castle Lane is ideally situated near the heart of the Montrose district, moments from the Montrose Shopping Park, a vibrant pedestrian oriented retail corridor with boutique shops, restaurants, cafes, and a popular weekly farmers market. The property benefits from direct freeway access via the 210 and 2 Freeways, connecting residents to Pasadena, Glendale, Burbank, and Downtown Los Angeles. The Jet Propulsion Laboratory (JPL) is within 3 miles, anchoring a highly educated, high-income renter demographic that sustains consistently low vacancy in this submarket.
Listing agent: Filip Niculete DRE #01905352 info@laaa.com, Listing office: Marcus & Millichap
MLS data updated 11/1/2026, 6:50:23 PM PT
Source: CRMLS, MLS #: 26668249
Belmont insights
Compare recorded home prices, same-type ZIP sales and mortgage rates.
Apr 30, 2026
Prices use the left axis; mortgage rates use the right. Hover, tap, or focus the chart and use the arrow keys. Red SOLD badges mark recorded sales.
This home · nearest recorded event
$1,280,000Closed sale · Apr 30, 2026ZIP 91011 · Apr 2026
No monthly averageAt least 3 eligible sales in this month are required.30-year fixed mortgage benchmark
No weekly rateNo published rate within 7 days of this date.ZIP averages use publicly displayable closed sales from our licensed MLS feed, matched to the same ZIP and exact property type. Months with fewer than 3 sales are omitted; the current month is incomplete. Lines connect available monthly observations across gaps and do not represent measured prices in missing months. These averages are not adjusted for size, condition, or location within the ZIP, and are not an appraisal. Feed coverage may not include every sale. All available shows the available home and ZIP history, with mortgage rates over the same dates.
Mortgage benchmark: Freddie Mac Primary Mortgage Market Survey®. © Freddie Mac. Weekly national 30-year fixed rates, not APRs or a loan quote. Actual terms vary. Methodology changed in November 2022. The chart does not establish that interest-rate changes caused a home’s price changes.
Lines connect recorded asking and sale prices. They are visual guides, not estimates of the home’s value between those dates.
No earlier records were returned by our current sources. This does not mean the home has never sold.
MLS records may be incomplete. Earlier asking prices are not sale prices.