Triplex with Attached
For Sale
$1,420,000
520 Studley Street, Sonoma, CA 95476
Three residences offer laundry rooms, central air, and a mix of duplex and detached living spaces.
Property Size5,418 SF
Days on Market355
Property Features for 520 Studley Street
General Information
Standard status
Active
Size
5,418 SF
Property subtype
Triplex
Additional Details
Multifamily Units
3
Amenities
laundry rooms
Central Air
Central
Composition
Building Details
Building Size
5,418 SF
Year Built
2007
Buildings
2
Listing Agency:
Sotheby's International Realty
Listed By:
Daniel Casabonne
Source:
Kw
Added: Sep 11, 2025
Changed: Aug 30
Last Checked: Aug 30 at 10:47PM
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 Sotheby's International Realty
Investment Insights
Based on property information with market context.
Built in 2007, this triplex combines a two-level duplex with a neighboring single-family dwelling. The duplex includes two residences, each offering three bedrooms, two full bathrooms, a laundry room, and an attached one-car garage. The adjacent home provides two bedrooms, two full bathrooms, and its own laundry room.
The property is located at 520 Studley Street in Sonoma, a few blocks from the Plaza. Interior features include central air, while the exterior has composition materials. The configuration brings three separate living spaces together on one property, with the duplex positioned beside the standalone residence.
The property is located at 520 Studley Street in Sonoma, a few blocks from the Plaza. Interior features include central air, while the exterior has composition materials. The configuration brings three separate living spaces together on one property, with the duplex positioned beside the standalone residence.
Key Highlights
- Two duplex residences, each with 3 bedrooms and 2 full bathrooms
- Attached one‑car garage for each duplex unit
- Adjacent single‑family dwelling with 2 bedrooms and 2 full bathrooms
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
$43,599
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%
$871,980
$872.0K
Cap Rate 7%
$622,843
$622.8K
Cap Rate 9%
$484,433
$484.4K
Market Conditions
NOI Build-Up for 5,418 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
$66.3K $12.24/SF
− Vacancy
−$4.0K −$0.74/SF
EGI
$62.3K $11.50/SF
− OpEx
−$18.7K −$3.45/SF
NOI
$43.6K $8.05/SF
Area
Sonoma County, CA
Vacancy
6.08%
Lease Rate
$12.24 /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%
$871,980
Cap Rate 7%
$622,843
Cap Rate 9%
$484,433
Alternative Uses
Best Use
Multifamily LT 5
$622.8K
$545.0K – $726.7K
NOI $43,599 @ 7.0% cap · market cap 3.07%
Second Best
Apartment 5plus
$573.8K
$502.1K – $669.4K
NOI $40,164 @ 7.0% cap · market cap 2.83%
Theoretical Best
Specialty Retail
$1.47M
$1.28M – $1.71M
NOI $102,771 @ 7.0% cap · market cap 7.24%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Property Profile
Current Use
Lease Details
3
Residential units
Location Intelligence
Trade Area within ½ mile
1,505
Businesses Nearby
Explore this area
Business Placement
Demographics for 95476, CA
34,575
Population
16,974
Households
2
Avg Household Size
50
Median Age
41%
College-Educated
90%
High-School Grad
107.8 sq mi
ZIP Area
321
Density / Sq Mi
$108,322
Median Household Income
$52,530
Median Earnings
$2,127
Median Rent
$882,300
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?
Triplex - Three residences offer laundry rooms, central air, and a mix of duplex and detached living spaces.
Where is this triplex located?
The property is located at 520 Studley Street Sonoma, CA.
What is the asking price?
The asking price for this property is $1,420,000.
What are key features of this property?
This property features: Two duplex residences, each with 3 bedrooms and 2 full bathrooms; Attached one‑car garage for each duplex unit; Adjacent single‑family dwelling with 2 bedrooms and 2 full bathrooms
