Charming San Rafael Office
For Sale
$1,198,000
1115 Irwin, San Rafael, CA 94939
Well-located office building with on-site parking and conversion potential.
Property Size2,729 SF
Price / SF$438.99
Days on Market476
Property Features for 1115 Irwin
General Information
Standard status
Active
Size
2,729 SF
Building Details
Year Built
1908
Listing Agency:
KEEGAN & COPPIN CO, INC
Listed By:
MATTHEW STORMS
4611010
Source:
Corcoran
Added: May 15, 2025
Changed: Mar 16
Last Checked: Mar 16 at 9:09AM
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 KEEGAN & COPPIN CO, INC
Investment Insights
Based on property information with market context.
This charming office building is well-located and features plentiful on-site parking. A new roof has been installed. The City of San Rafael indicates the property can be converted back to residential uses. The building offers 2729 square feet of space, suitable for small businesses.
Key Highlights
- Plentiful on‑site parking
- New roof
- Suitable for office small businesses
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
$55,151
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
4.60%
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%
$1,103,020
$1.1M
Cap Rate 7%
$787,871
$787.9K
Cap Rate 9%
$612,789
$612.8K
Market Conditions
NOI Build-Up for 2,729 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
$98.6K $36.12/SF
− Vacancy
−$25.0K −$9.17/SF
EGI
$73.5K $26.95/SF
− OpEx
−$18.4K −$6.74/SF
NOI
$55.2K $20.21/SF
Area
Marin County, CA
Vacancy
25.40%
Lease Rate
$36.12 /SF/Yr
Expense Ratio
25.00%
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%
$1,103,020
Cap Rate 7%
$787,871
Cap Rate 9%
$612,789
Alternative Uses
Best Use
Office B
$787.9K
$689.4K – $919.2K
NOI $55,151 @ 7.0% cap · market cap 4.60%
Second Best
—
—
no second resolved use
Theoretical Best
Specialty Retail
$13.33M
$11.66M – $15.55M
NOI $933,103 @ 7.0% cap · market cap 77.89%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Property Profile
Current Use
Location Intelligence
Trade Area within ½ mile
3,635
Businesses Nearby
Explore this area
Business Placement
Demographics for 94939, CA
7,465
Population
3,691
Households
2
Avg Household Size
48
Median Age
76%
College-Educated
98%
High-School Grad
2.4 sq mi
ZIP Area
3,110
Density / Sq Mi
$182,743
Median Household Income
$84,235
Median Earnings
$3,104
Median Rent
$2,000,001
Median Home Value
Market
Vacancy Rate% for Office in West region
Questions? Ask Rey
Realmo’s AI knows this listing — price, zoning, demand, history. Ask anything.
Frequently Asked Questions
What type of property is this?
Office building - Well-located office building with on-site parking and conversion potential.
Where is this office building located?
The property is located at 1115 Irwin San Rafael, CA.
What is the asking price?
The asking price for this property is $1,198,000.
What are key features of this property?
This property features: Plentiful on‑site parking; New roof; Suitable for office small businesses
