Sample Market Analysis · Altadena, CA

A 2,400 Sq Ft, 4-Bedroom Home in Altadena

Method demonstration · hypothetical property, no real address · Los Angeles County, CA
Joshua Sun
AI Hub · Sample Analysis
The Archetype
2,400 Sq Ft · 4 Bedrooms · Altadena, CA
Prepared as a method demonstration, not a real listing or appraisal
Jul 17, 2026
Altadena data as of
Jun 25, 2026
8-city closed window ends
Jul 17, 2026
Active inventory as of
What 2,400 Sq Ft Sells For in Altadena Right Now

Closed sales, Altadena, 1,900–2,900 sq ft band (built homes only), trailing 90 days as of July 17, 2026. Source: Altadena 90 day comps (7-17-26).csv.

$1,751,200
Median Closed Price
$786
Median $ / Sq Ft
35 days
Median Days on Market
22
Closed Sales in Band
Band Closed Sales22
Median Closed Price$1,751,200
Median Price / Sq Ft$786.27
Closed Price Range$1,297,500 – $2,849,000
Median Days on Market35 (range 6–171)
All Sizes, Same File52
Closed Sales, 90 Days52
Sqft Range Covered1,257 – 3,380
Data SourceCRMLS export
As OfJuly 17, 2026

Sale-to-list ratio is not shown. This export carries a single List/Close Price field per listing (list price for actives, close price for solds) with no original list price column, so sale-to-list cannot be computed cleanly from this data and was left off rather than estimated.

The Surrounding-Cities Picture

Closed sales, 1,900–2,900 sq ft band (built homes only), April 1 – June 25, 2026. Source: 8 Cities closed 4.1.26 - 6.25.26.csv (combined 1–500 and 501–524 files). This is a different window than the Altadena figures above. Altadena is not in this extract and is shown separately for comparison.

CityClosed, band (n)Median PriceMedian $/Sq FtMedian DOM
San Marino9$2,635,500$1,162.2517
South Pasadena11$2,450,134$1,054.0416
La Cañada Flintridge18$2,412,500$939.3818.5
Pasadena41$2,100,000$859.6033
Arcadia24$1,811,500$797.4115
Sierra Madre7$1,800,000$793.7040
Glendale39$1,800,000$787.7022
La Crescenta16$1,630,000$781.2628.5
Altadena (subject, separate window)22$1,751,200$786.2735
The Archetype Translated · Same 2,400 Sq Ft, Each City’s Median $/Sq Ft

Each city’s band median $/sq ft (table above) × 2,400 sq ft. Purely arithmetic, not a valuation of any specific home.

San Marino
$2,789,400
+$902K vs Altadena
South Pasadena
$2,529,696
+$643K vs Altadena
La Cañada Flintridge
$2,254,512
+$367K vs Altadena
Pasadena
$2,063,040
+$176K vs Altadena
Arcadia
$1,913,784
+$27K vs Altadena
Sierra Madre
$1,904,880
+$18K vs Altadena
Glendale
$1,890,480
+$3K vs Altadena
Altadena (subject)
$1,887,048
baseline
La Crescenta
$1,875,024
−$12K vs Altadena
Inventory Now

Active listings, 1,900–2,900 sq ft band (built homes only), snapshot July 17, 2026. Source: 8 Cities actives (7-17-26).csv. These are asking prices, not values.

CityActive, band (n)Median Ask $/Sq FtMedian DOM (active)
La Cañada Flintridge6$985.625.5
Pasadena33$841.0543
South Pasadena6$806.3253
Sierra Madre14$758.1033
Glendale30$746.0442
Altadena (subject)18$743.4547.5
Arcadia27$728.3518
La Crescenta11$697.0124

San Marino does not appear in this actives extract (0 rows of any size, not just the band). This is a gap in the pulled file, not a claim that San Marino has zero active inventory, so it was left out rather than estimated.

What This Means
01Altadena prices below every neighbor with band closings except one. At $786/sq ft, Altadena's closed band median trails San Marino, South Pasadena, La Cañada Flintridge, Pasadena, Arcadia, Sierra Madre, and Glendale, and sits within $12/sq ft of La Crescenta, the one city currently priced close to even.
02The same 2,400 sq ft home carries a real dollar gap to the closest large comp market. Translated at each city's own median $/sq ft, this footprint runs about $176K more in Pasadena (n=41 closes) and $367K more in La Cañada Flintridge (n=18 closes) than the Altadena band median implies.
03Altadena's active listings are sitting longer than almost anywhere nearby. Band-active median DOM is 47.5 days in Altadena, longer than every city shown except South Pasadena (53 days), and well above Arcadia (18) or La Cañada Flintridge (5.5).
04Recent closings moved faster than current actives suggest. The 22 band closings behind that $786/sq ft median carried a 35-day median DOM, meaningfully faster than the 47.5-day median now showing on active band listings, a gap worth watching on new listings.
05Real transaction volume, wide range. The 22 band closings ranged from $1,297,500 to $2,849,000, confirming this footprint trades across a broad price spectrum in Altadena, not just at one price point.
Prepared by Joshua Sun
joshuasun.co/aitools
Sample analysis for education. Data: MLS exports as of July 17, 2026 (Altadena closed sales and 8-city active inventory) and April 1 – June 25, 2026 (8-city closed sales). Not an appraisal or an offer of value for any specific property. The 2,400 sq ft, 4-bedroom Altadena home referenced throughout is a hypothetical archetype for demonstration only and does not correspond to a real address or listing.