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ActiveMulti-Family

$1,780,000

143-145 N Humboldt St, San Mateo 94401

Beds6
Baths5.5
Sqft4,008
DOM19
No Photos Available

AddressIntel AI Briefing

An SB 9 lot split is completely blocked here, forcing developers to look at long-term holds or basic renovations. Active liquefaction hazards and high existing lot coverage further diminish redevelopment potential. The thin margin between asking price and projected ARV makes any major ground-up construction financially unviable.

Property Permit History

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

Recent Neighborhood Remodeling (San Mateo)

2026-08-24927 S GRANT ST SAN MATEO 94402-1813 CA
Single Family (Addition) - Add/Alter
$110,190Issued
2026-08-211241 SHAFTER ST SAN MATEO 94402-2901 CA
Single Family (Alteration/Repair) - Kitchen & Bath Remodel (Flat)
$22,000Issued
2026-08-211241 SHAFTER ST SAN MATEO 94402-2901 CA
Single Family (Alteration/Repair) - Kitchen & Bath Remodel (Flat)
$35,000Issued
2026-08-211133 WAYNE WAY SAN MATEO 94403-1564 CA
Single Family (Alteration/Repair) - Kitchen & Bath Remodel (Flat)
$30,000Issued
2026-08-21510 BOREL AVE SAN MATEO 94402-3406 CA
Single Family (Alteration/Repair) - Alter
$28,882Issued
2026-08-202614 ALAMEDA DE LAS PULGAS SAN MATEO 94403-2652 CA
Single Family (Alteration/Repair) - Kitchen & Bath Remodel (Flat)
$7,000Issued

Parcel & Zoning Info

APN033123170
Official Lot Sqft7,602
Zoning CodeNO DATA ASSIGNED
SB 9 StatusN/A

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

College Park Elementary

San Mateo-Foster City

0.3 miles away
Middle School

Borel Middle

San Mateo-Foster City

1.7 miles away
High School

The Bridge Academy

San Mateo Union High

0.4 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

67/100

Based on recent sales velocity and local demand in 94401.

Flippability Score

15/100

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

Bidding War Prob.

47%

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 multi-family sales in San Mateo (94401): $438/sqft. Sized within 50% of the 6,000 sqft build, because smaller houses sell for more per foot and pricing a rebuild off them overstates resale.

Commission, transfer tax and closing. Deducted from resale before profit, so the ROI below is net of the exit rather than gross.

Carry on total capital for the project duration. At 0% the model is a cash purchase; 12 months at a typical construction-loan rate moves ROI by 6 to 10 points on a deal this size, so price it with your real rate.

Hard Costs$3,300,000
New Build6,000 sqft
Total Capital Required$5,255,000
Estimated Resale (ARV)$2,628,000
Cost of Sale (5%)-$131,400
Net Proceeds$2,496,600

Projected Profit

-$2,758,400
-52.5% ROI

Warning: Project is mathematically underwater.

Recent Comparables (San Mateo 94401)

Sized to the modelled 6,000 sqft build: sales within 50% of it. Smaller houses sell for more per foot, so pricing a rebuild off them overstates resale.

711 Highland Ave

Sold
$2,350,000
Sold: 2026-07-28
Lot: 7,964
Sqft: 5538
$/Sqft: $424

117 N Delaware St

Sold
$1,825,000
Sold: 2026-06-26
Lot: 5,750
Sqft: 4165
$/Sqft: $438

200 7th Ave

Sold
$2,500,000
Sold: 2026-06-18
Lot: 6,344
Sqft: 4160
$/Sqft: $601

229 N Humboldt St

Sold
$1,650,000
Sold: 2026-03-24
Lot: 6,450
Sqft: 3328
$/Sqft: $496

809 N Delaware St

Sold
$626,500
Sold: 2026-02-04
Lot: 6,250
Sqft: 3316
$/Sqft: $189