Back to Search
Property profile & analytics
OFF-MARKET
Estimated value
$1,760,000
Apartment buildings
538 Columbia Ave Sunnyvale, CA 94085-4476
Individually Owned
1-yr Hold
Absentee Owner
~
Est. High Equity
Property ID
US09-3157485
Property summary
AI-generated overview
This exceptional investment opportunity presents a six-unit multi-family property ideally situated at 538 Columbia Avenue in Sunnyvale, California. Built in 1961, this 4,101 square foot property sits on a 0.2-acre lot and offers a compelling mix of unit sizes to cater to diverse tenant needs. The unit configuration includes one three-bedroom, two-bathroom unit
Property profile
Verified
Property type
Apartment buildings
Use group
APARTMENT HOUSE (5+ UNITS)
Year built
1961
Construction
WOOD
Total area
4,101 SF
Lot
0.2 ac (8,646 SF)
Zoning code
R3
APN
204-38-035
UPID
US09-3157485
Cap rate & NOI
Priority signal for investors
Implied cap rate, NOI & suggested price
Cap rate vs submarket · NOI estimate · 3 price anchors
Implied cap rate, NOI & suggested price
Cap vs submarket · NOI estimate · 3 price anchors
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$1.71M
CAP Approach
CAP
$1.34M
Comparable Approach
Comparable
by Request
Blend (final)
Blend
$1.76M
Owner & transaction history
Michael F Chalhoub · 1 yrs held
Michael F Chalhoub
since 2025
Last sale
$1.8M
5 recorded transactions
Zoning & alternative use
R3 · Sunnyvale, CA
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Office building
$2.6M
+43.4%
Retail stores
$2.2M
+23.8%
Cap rate
Implied · in-place · derived from last sale + estimated NOI
Implied Cap rate
#1
Implied · in-place · NOI ÷ last sale
In-place · derived from last sale + estimated NOI
Cap rate, NOI & submarket benchmark
Implied cap rate vs Sunnyvale submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Sunnyvale submarket · NOI estimate · typical band, median & reading
Refine your cap rate
8-question underwriting flow
1.
Property current status — Going-In vs Stabilized
2.
Price for denominator — asking / offer / market
3.
Leasing status & lease structure (NNN / Gross)
4.
Tenant risk profile & vacancy assumption
5.
Upload T12 / rent roll / OM (optional)
Refine in 60 seconds, get exact suggested price
T12 upload · Submarket benchmarks · Sensitivity grid
Suggested price · 3 cap rate anchors
Income approach @ 5% / 7% / 9% — aggressive / typical / conservative
Suggested price at 5% / 7% / 9% cap
Aggressive / typical / conservative · Implied $/SF per anchor · Sensitivity grid
Suggested price at 5% / 7% / 9% cap
Aggressive / typical / conservative · implied $/SF · sensitivity
Value
AI, CAP & Alternative Use estimations · Realmo proprietary blendValue Estimations
Based on Realmo’s proprietary methodology
AI Approach
Method
Estimation
Statistic approach
$1,830,000
ML approach
$1,705,000
CAP Approach
CAP Return
Estimation
6%
$1,445,000
6.5%
$1,335,000
7%
$1,240,000
Alternative Use
Use
Estimation
APARTMENT HOUSE (5+ UNITS)
$1,805,000
Current use
OFFICE BUILDING
$2,585,000
Change: +43% · Conversion: Moderate
RETAIL STORES
$2,230,000
Change: +24% · Conversion: Difficult
WAREHOUSE, STORAGE
$1,460,000
Change: -19% · Conversion: Difficult
Blend value · Realmo final
$1.76M
Range $1.58M – $1.94M · ±10% · vs last sale $1.75M (May 30 2025)
Last sale anchor
$1.75M
May 30 2025
Realmo estimate · informational only.
These numbers are calculated by our models from public records and may not reflect actual market value.
Not an appraisal.
Verify with a licensed appraiser before transacting. Realmo accepts no liability for divergence from real-world outcomes.
View the full estimation — every method, every assumption
Confidence drivers & risk notes · Custom comparable set · Free for first 3 / day
Full estimation methodology
Every method · every assumption · confidence drivers
Price per SF
Sale + rent benchmarks
Subject property
$429 / SF
Submarket sale & rent benchmarks
Median sale $/SF · Asking & closed rent · Submarket vacancy
Submarket sale & rent benchmarks
Median sale $/SF · asking & closed rent · submarket vacancy
Property tax & assessments
Tax year 2024Property tax & assessments
Tax year 2024
Tax billed
$30,675
Tax year 2024
Assessed value
$2,631,600
Assessed 2024
Previous assessed
$2,631,600
+0.0% YoY
Effective rate
1.17%
On assessed value
Assessed land
$1,851,300
Assessed improvement
$780,300
Applied tax rate
9.0000
Comparables
6 recent transactions · within 1.5 miComparable in this city
6 recent transactions
Comparable in this City
Similar Nearby for Sale
Similar Nearby for Lease
Recent comparable sales
Sale price & price/SF · Sale date & distance · Adjustments & confidence
Recent comparable sales
Sale price & $/SF · sale date & distance · adjustments
Property description
Physical attributes from public recordsBuilding & lot
Public records
Property type
Apartment buildings
Use group
APARTMENT HOUSE (5+ UNITS)
Status
Off-Market
Year built
1961
Construction
WOOD
Heating
NONE
Cooling
NONE
Stories
2
Units
6
Total area
4,101 SF
Lot
0.2 ac (8,646 SF)
Zoning code
R3
APN
204-38-035
UPID
US09-3157485
Jurisdiction
SANTA CLARA
Zoning & alternative use
R3 · Sunnyvale, CA
Zoning R3 · permitted uses
R3 · Sunnyvale, CA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Sunnyvale. Always verify with local authorities before improvements.
Alternative use value scenarios
Repositioning upside vs current use
APARTMENT HOUSE (5+ UNITS) Current
Est. value
$1.8M
OFFICE BUILDING
Est. value
$2.6M
RETAIL STORES
Est. value
$2.2M
WAREHOUSE, STORAGE
Est. value
$1.5M
APARTMENT HOUSE (5+ UNITS) Current
OFFICE BUILDING
RETAIL STORES
WAREHOUSE, STORAGE
Alternative use deep dive — conversion cost, permits, timeline
Conversion cost estimate · Permit path & risks · Stabilized NOI per option
Alternative use deep dive
Conversion cost · permit path · stabilized NOI per option
Building & site characteristics
From public records
Year built
1961
Construction
WOOD
Heating
NONE
Cooling
Yes
Stories
2
Units
6
Lot
0.2 ac
Current owner
From public records · entity-resolved
Michael F Chalhoub
Individual
Mailing address
9965 HAFFLINGER CT, RENO, NV 89521-4520
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
2025
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
5 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
May 30, 2025
$1,750,000
Michael F Chalhoub
Trudi R Ciaruffoli
Grant Deed
$1,137,500 · Douglas Sykes
Dec 16, 2022
—
Trudi R Ciaruffoli
Joanne R Trudi Ciaruffoli
Intrafamily Transfer
related
—
May 10, 1995
—
Ciaruffoli Trust
Ciaruffoli,louis
Quit Claim Deed
related
—
Mar 4, 1994
—
Ciaruffoli Trust
Ciaruffoli,louis
Quit Claim Deed
related
—
—
—
Ciaruffaoli Trust
—
Deed Of Trust
related
$450,000 · Fremont Bank
Coming soon
Costs & Benchmarks
Operating expenses, capex projections, utility benchmarks, and submarket comparables — all in one view.
Coming soon
Risks
Flood, climate, environmental, title, and tenant-concentration risk — surfaced with mitigations and source citations.
Try Rey
Ask anything about this address in plain English.
“Is 15.6% cap rate sustainable?” · “Best tenant mix for BU1?” · “What’s the redev upside?”
You own 538 Columbia Ave?
List it free. Reach 20,000 daily buyers.
We’ve already pulled the facts. Confirm photos + price and you’re live in 2 minutes.
List this address →
Full reports are paid
Unlock the full Property Analytics report
Start free for 7 days — no card required. Full owner contacts, all 4 valuations with methodology, refine flow, comparable adjustments, foot-traffic deep dive, export to PDF / CSV.
