Duplex with Attached
New
For Sale
$1,780,000
143-145 N N Humboldt Street, San Mateo, CA 94401
Each residence includes private driveway parking, an attached garage, and a rear yard shared by the property.
Property Size4,008 SF
Price / SF$444.11
Days on Market5
Property Features for 143-145 N N Humboldt Street
General Information
Standard status
Active
Size
4,008 SF
Property subtype
Multi Family
Site & Location
Highway Access
Yes
Public Transit
Yes
Units
Unit Mix
2 x 3BR/2.5BA
Multifamily Units
2
Building Details
Year Built
1986
Buildings
1
Listing Agency:
WEM Pacific Investment Inc.
(650) 991-9988
Listed By:
Wendy L. Ng · License #01521487
(650) 991-9988
Source:
Exitrealty
Added: Aug 6
Changed: Aug 9
Last Checked: Aug 9 at 6:51AM
Displayed information is deemed reliable but is not guaranteed and should be independently verified. All listing content including descriptions, pricing, images are the copyrighted material of WEM Pacific Investment Inc.
Investment Insights
Based on property information with market context.
This 4,008-square-foot duplex, built in 1986, contains two three-bedroom, two-and-a-half-bath units. Each residence has an attached one-car garage and private driveway parking, while the property also includes a large rear yard. The existing configuration provides substantial residential space across both units.
Located at 143-145 N. Humboldt Street in San Mateo, the property is minutes from Downtown San Mateo, Caltrain, shopping, dining, and parks. Highways 101 and 92 are also identified among the nearby commute routes. The rear yard may support consideration of an ADU or future expansion, subject to verification with the City of San Mateo.
Located at 143-145 N. Humboldt Street in San Mateo, the property is minutes from Downtown San Mateo, Caltrain, shopping, dining, and parks. Highways 101 and 92 are also identified among the nearby commute routes. The rear yard may support consideration of an ADU or future expansion, subject to verification with the City of San Mateo.
Key Highlights
- Two three‑bedroom, 2.5‑bath units
- 4,008 square feet; built in 1986
- Each unit includes an attached one‑car garage
Financial Insights
Estimated NOI and Cap Rate
NOI = area × lease_rate × (100 − vacancy) / 100 × (1 − expense_ratio). Net Operating Income — what the owner takes home each year before mortgage payments and income tax. Effective rent (asking rent minus vacancy losses) minus operating costs (taxes, insurance, maintenance, management).
NOI / Yr
$100,219
Cap rate = NOI / list price × 100. Capitalization rate — annual return on a fully cash purchase, before financing. NOI divided by price. Higher means more income per dollar invested, but usually also more risk or older condition. 5–8% is typical for stabilized commercial property; double digits often signal distressed deals.
Cap Rate
5.63%
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$2,004,380
$2.0M
Cap Rate 7%
$1,431,700
$1.4M
Cap Rate 9%
$1,113,544
$1.1M
Market Conditions
NOI Build-Up for 4,008 SF
Vacancy — income lost from leasable area expected to sit empty during the year, subtracted from gross rent.
EGI (Effective Gross Income) — gross rent minus vacancy losses, the realistic income before paying operating costs.
OpEx (Operating Expenses) — recurring costs to operate the property (property tax, insurance, utilities, maintenance, management); excludes financing and capital improvements.
NOI (Net Operating Income) — income a property generates after operating costs but before financing and taxes.
Gross rent
$151.5K $37.80/SF
− Vacancy
−$8.3K −$2.08/SF
EGI
$143.2K $35.72/SF
− OpEx
−$43.0K −$10.72/SF
NOI
$100.2K $25.00/SF
Area
San Mateo, CA
Vacancy
5.50%
Lease Rate
$37.80 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$2,004,380
Cap Rate 7%
$1,431,700
Cap Rate 9%
$1,113,544
Alternative Uses
Best Use
Multifamily LT 5
$1.43M
$1.25M – $1.67M
NOI $100,219 @ 7.0% cap · market cap 5.63%
Second Best
Apartment 5plus
$1.29M
$1.13M – $1.51M
NOI $90,469 @ 7.0% cap · market cap 5.08%
Theoretical Best
Office A
$1.59M
$1.39M – $1.85M
NOI $110,967 @ 7.0% cap · market cap 6.23%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Current Use
Lease Details
2
Residential units
Yes
Highway access
Location Intelligence
Trade Area within ½ mile
2,375
Businesses Nearby
Explore this area
Business Placement
Demographics for 94401, CA
35,249
Population
13,798
Households
2.6
Avg Household Size
37
Median Age
45%
College-Educated
85%
High-School Grad
3.1 sq mi
ZIP Area
11,371
Density / Sq Mi
$121,258
Median Household Income
$57,724
Median Earnings
$2,713
Median Rent
$1,123,300
Median Home Value
Market
Vacancy Rate% for Multifamily in West region
Questions? Ask Rey
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Frequently Asked Questions
What type of property is this?
Duplex - Each residence includes private driveway parking, an attached garage, and a rear yard shared by the property.
Where is this duplex located?
The property is located at 143-145 N N Humboldt Street San Mateo, CA.
What is the asking price?
The asking price for this property is $1,780,000.
What are key features of this property?
This property features: Two three‑bedroom, 2.5‑bath units; 4,008 square feet; built in 1986; Each unit includes an attached one‑car garage
