Duplex With Townhouse
New
For Sale
$2,398,000
17101712 Gum Street, San Mateo, CA 94402
Two attached residences offer private living areas, garages, balconies, and separate household amenities on one lot.
Property Size2,940 SF
Price / SF$815.65
Days on Market7
Property Features for 17101712 Gum Street
General Information
Standard status
Active
Size
2,940 SF
Total Parking Spaces
2
Property subtype
Multi-family
Site & Location
Highway Access
Yes
Public Transit
Yes
Units
Unit Mix
1 x 2BR/2.5BA, 1 x 2BR/2.5BA + loft
Multifamily Units
2
Amenities
A/C
in-unit laundry
private balcony
backyard
BBQ gas line
vegetable garden beds
soaking tub
custom closet
Building Details
Year Built
2004
Construction
contemporary
Listing Agency:
Coldwell Banker Realty
Listed By:
Tami Chiu
(714) 497-3550
Source:
Sevengables
Added: Sep 4
Changed: Sep 9
Last Checked: Sep 10 at 5:50AM
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 Coldwell Banker Realty
Investment Insights
Based on property information with market context.
Built in 2004, this 2,940-square-foot duplex contains two townhouse-style residences with bright interiors, wood floors, high ceilings, recessed lighting, and updated kitchen finishes. Each home includes two bedrooms, two-and-a-half baths, a primary suite with a soaking tub, air conditioning, in-unit laundry, a private outdoor area, and an attached one-car garage. The 1710 residence adds en-suite baths, a custom closet, a private balcony, backyard barbecue infrastructure, and irrigated garden beds. The 1712 residence includes a loft that may function as a third bedroom, along with a side patio and balcony.
The property is located at 1710–1712 Gum Street in San Mateo, near Hayward Park Caltrain, Starbucks, restaurants, shopping, and access to major freeways. Its two-home configuration supports owner occupancy alongside rental use, a multi-generational arrangement, or consideration of a condo conversion, subject to applicable requirements.
The property is located at 1710–1712 Gum Street in San Mateo, near Hayward Park Caltrain, Starbucks, restaurants, shopping, and access to major freeways. Its two-home configuration supports owner occupancy alongside rental use, a multi-generational arrangement, or consideration of a condo conversion, subject to applicable requirements.
Key Highlights
- Two‑residence duplex totaling 2,940 square feet
- Built in 2004 with two 2‑bedroom, 2.5‑bath townhouse residences
- 1712 Gum includes a loft that could serve as a 3rd bedroom
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
$73,514
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
3.07%
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%
$1,470,280
$1.5M
Cap Rate 7%
$1,050,200
$1.1M
Cap Rate 9%
$816,822
$816.8K
Market Conditions
NOI Build-Up for 2,940 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
$111.1K $37.80/SF
− Vacancy
−$6.1K −$2.08/SF
EGI
$105.0K $35.72/SF
− OpEx
−$31.5K −$10.72/SF
NOI
$73.5K $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%
$1,470,280
Cap Rate 7%
$1,050,200
Cap Rate 9%
$816,822
Alternative Uses
Best Use
Multifamily LT 5
$1.05M
$918.9K – $1.23M
NOI $73,514 @ 7.0% cap · market cap 3.07%
Second Best
Apartment 5plus
$948.0K
$829.5K – $1.11M
NOI $66,362 @ 7.0% cap · market cap 2.77%
Theoretical Best
Office A
$1.16M
$1.02M – $1.36M
NOI $81,398 @ 7.0% cap · market cap 3.39%
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
3,057
Businesses Nearby
Explore this area
Business Placement
Demographics for 94402, CA
25,879
Population
10,623
Households
2.4
Avg Household Size
42
Median Age
69%
College-Educated
95%
High-School Grad
5.1 sq mi
ZIP Area
5,074
Density / Sq Mi
$179,683
Median Household Income
$104,257
Median Earnings
$3,476
Median Rent
$2,000,001
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 - Two attached residences offer private living areas, garages, balconies, and separate household amenities on one lot.
Where is this duplex located?
The property is located at 17101712 Gum Street San Mateo, CA.
What is the asking price?
The asking price for this property is $2,398,000.
What are key features of this property?
This property features: Two‑residence duplex totaling 2,940 square feet; Built in 2004 with two 2‑bedroom, 2.5‑bath townhouse residences; 1712 Gum includes a loft that could serve as a 3rd bedroom
