Back to Search
ActiveTownhouse

$1,539,000

409 Longden Ave, San Mateo 94403

Beds2
Baths2.5
Sqft1,360
DOM13
No Photos Available

AddressIntel AI Briefing

Framed as a condo investment, this asset is severely overpriced at 34.6% above market comps, offering limited upside. Despite its relatively modern 2015 build, the low estimated rental yield does not justify the high entry price.

Property Permit History

No permit history found directly associated with this property's address.

Recent Neighborhood Remodeling (San Mateo)

2026-08-04520 BUCKNELL DR SAN MATEO 94402-3250 CA
Single Family (Addition) - Add/Alter
$275,473Issued
2026-08-04725 E 16TH AVE SAN MATEO 94402-2131 CA
Single Family (Alteration/Repair) - Kitchen & Bath Remodel (Flat)
$20,388Issued
2026-08-043131 SUNSET TER SAN MATEO 94403-3846 CA
Single Family (Addition) - Add/Alter
$79,365Issued
2026-08-03116 POWELL ST SAN MATEO CA 94401-2033
Single Family (Addition) - Add/Alter
$268,896Issued
2026-08-032831 MONTEREY ST Unit: B SAN MATEO CA 94403
Single Family (New) - New
$123,326Issued
2026-07-31908 9TH AVE SAN MATEO CA 94402-1434
Single Family (Alteration/Repair) - Kitchen & Bath Remodel (Flat)
$17,000Issued

Parcel & Zoning Info

APN124200050
Official Lot Sqft648
Zoning CodeNO DATA ASSIGNED
SB 9 StatusN/A

Condo Investment Snapshot

Value Score0/100
Price / Sqft$1,132 vs $835 mkt
Price vs Market+35.6% Above market
Est. Rent$5,344/mo

Price positioning vs. 76 recent comparable condo/townhome sales in this ZIP. Est. rent is a rule-of-thumb (price ÷ 24 ÷ 12), not a market quote. SB 9 / ADU development analysis doesn't apply to condos: the owner doesn't control the underlying land.

Hazard Snapshot

Flood Zone

X
Area of minimal flood hazard.

Fire Severity

None
Not in a mapped state fire severity zone.

Liquefaction

Yes
In a mapped liquefaction zone. May require specialized foundation engineering.

Fault Zone

No
Not in a mapped Alquist-Priolo fault zone.

Not a substitute for a Natural Hazard Disclosure (NHD) report. Zones reflect available GIS data and may not cover all localities.

Nearby Public Schools

Elementary School

George Hall Elementary

San Mateo-Foster City

0.5 miles away
Middle School

Abbott Middle

San Mateo-Foster City

1.2 miles away
High School

Hillsdale High

San Mateo Union High

1.2 miles away

School boundaries are subject to change. Nearest school distance does not guarantee enrollment eligibility. Check with the local district. Data provided by CDE.

Proprietary Intelligence

Market Heat Index

84/100

Based on recent sales velocity and local demand in 94403.

Flippability Score

10/100

Measures neighborhood renovation density vs. recent permits on this property.

Bidding War Prob.

66%

Likelihood of multiple offers based on local list-to-sale ratios and DOM.

Proforma ROI Calculator

Back-of-the-napkin deal analysis across development strategies.

Median of 5 recent sales in 94403: $1,273/sqft. Too few same-type sales in this zip, so the mix includes other property types.

Hard Costs$800,000
New Build2,000 sqft
Total Capital Required$2,514,000
Estimated Resale (ARV)$2,546,000

Projected Profit

$32,000
1.3% ROI

Warning: Margin is tight for the construction risk.

Recent Comparables (94403)

3031 Flores St

Sold
$1,950,000
Sold: 2026-08-04
Lot: 7,609
Sqft: 1450
$/Sqft: $1,345

617 30th Ave

Sold
$1,400,000
Sold: 2026-07-02
Lot: 5,940
Sqft: 1100
$/Sqft: $1,273

3320 Kimberly Way

Sold
$1,200,000
Sold: 2026-07-31
Lot: 1,756
Sqft: 1260
$/Sqft: $952

10 Scenic Way Apt 307

Sold
$900,000
Sold: 2026-07-28
Lot: -
Sqft: 1138
$/Sqft: $791

2324 Red Oak Ct

Sold
$2,660,000
Sold: 2026-06-26
Lot: -
Sqft: -
$/Sqft: -

2105 Stratford Way

Sold
$2,650,000
Sold: 2026-07-22
Lot: 9,246
Sqft: 2010
$/Sqft: $1,318