Back to Search
Property profile & analytics
OFF-MARKET
Estimated value
$6,225,000
Office buildings
4305 21st Ave Tampa, FL 33605-2311
Entity Owned
18-yr Hold
Free & Clear
Property ID
US18-2935021
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1983
Construction
MASONRY/CONCRETE MASONRY UNITS (CMUS)
Total area
27,180 SF
Lot
19.58 ac (852,922 SF)
Zoning code
IG
APN
A0929194BO000000000044
UPID
US18-2935021
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
Current use
Occupant on record · Public records
-
Hillsborough Area Regional Transit- Operations Facility Corporate Office
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
by Request
CAP Approach
CAP
$6.06M
Comparable Approach
Comparable
$5.69M
Blend (final)
Blend
$6.23M
Owner & transaction history
HILLSBOROUGH TRANSIT AUTHORITY
HILLSBOROUGH TRANSIT AUTHORITY
Zoning & alternative use
IG · Tampa, FL
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Apartment house (5+ units)
$10.0M
+35.0%
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 Tampa submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Tampa 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
by Request
ML approach
by Request
CAP Approach
CAP Return
Estimation
6%
$6,565,000
6.5%
$6,060,000
7%
$5,630,000
Alternative Use
Use
Estimation
OFFICE BUILDING
$7,385,000
Current use
APARTMENT HOUSE (5+ UNITS)
$9,970,000
Change: +35% · Conversion: Easy
MEDICAL BUILDING
$7,345,000
Change: 0% · Conversion: Easy
NEIGHBORHOOD: SHOPPING CENTER
$7,070,000
Change: -4% · Conversion: Difficult
RETAIL STORES
$6,035,000
Change: -18% · Conversion: Moderate
Blend value · Realmo final
$6.23M
Range $5.60M – $6.85M · ±10%
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
$229 / 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 2023Property tax & assessments
Tax year 2023
Assessed value
$12,022,918
Assessed 2023
Previous assessed
$10,869,919
+10.6% YoY
Assessed land
$3,144,948
Assessed improvement
$8,877,970
Land market value
$3,144,948
Improvement market value
$8,877,970
Total market value
$12,022,918
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
Office buildings
Use group
OFFICE BUILDING
Status
Off-Market
Year built
1983
Construction
MASONRY/CONCRETE MASONRY UNITS (CMUS)
Heating
CENTRAL
Cooling
CENTRAL
Buildings
3
Stories
1
Units
1
Rooms
21
Bathrooms
1
Total area
27,180 SF
Lot
19.58 ac (852,922 SF)
Zoning code
IG
APN
A0929194BO000000000044
UPID
US18-2935021
Jurisdiction
HILLSBOROUGH
Zoning & alternative use
IG · Tampa, FL
Zoning IG · permitted uses
IG · Tampa, FL
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Tampa. Always verify with local authorities before improvements.
Alternative use value scenarios
Repositioning upside vs current use
OFFICE BUILDING Current
Est. value
$7.4M
APARTMENT HOUSE (5+ UNITS)
Est. value
$10.0M
MEDICAL BUILDING
Est. value
$7.3M
NEIGHBORHOOD: SHOPPING CENTER
Est. value
$7.1M
RETAIL STORES
Est. value
$6.0M
OFFICE BUILDING Current
APARTMENT HOUSE (5+ UNITS)
MEDICAL BUILDING
NEIGHBORHOOD: SHOPPING CENTER
RETAIL STORES
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
1983
Construction
MASONRY/CONCRETE MASONRY UNITS (CMUS)
Heating
CENTRAL
Cooling
Yes
Stories
1
Buildings
3
Units
1
Rooms
21
Bathrooms
1
Lot
19.58 ac
Current owner
From public records · entity-resolved
HILLSBOROUGH TRANSIT AUTHORITY
Individual
Free & Clear · 0 yrs held
Mailing address
1201 E 7TH AVE, TAMPA, FL 33605-3502
Mailing matches property
Yes
Owner-occupied
Yes
Ownership since
—
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
No recorded transactions
No recorded transactions found for this property.
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 4305 21st 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.
