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Property profile & analytics
OFF-MARKET
Estimated value
$21,705,000
Office buildings
20313 28th S Ave Seatac, WA 98198-5228
Entity Owned
5-yr Hold
Free & Clear
Property ID
US90-1633457
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1980
Construction
WOOD
Total area
91,636 SF
Lot
4.18 ac (181,957 SF)
Zoning code
RBX
APN
344500-0115
UPID
US90-1633457
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
-
Isalis (Bike/Boat/Book/etc) Store
-
Party City Party Supply Store (Bike/Boat/Book/etc) Store
-
Skunk Funk Big Box & Wholesale Store
-
Carl's Trading Co Hat Shop
-
Bushka's Kitchen LLC (Bike/Boat/Book/etc) Store
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
by Request
CAP Approach
CAP
by Request
Comparable Approach
Comparable
by Request
Blend (final)
Blend
$21.71M
Owner & transaction history
Department Of Transportation · 5 yrs held
Department Of Transportation
since 2020
2 recorded transactions
Zoning & alternative use
RBX · Seatac, WA
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Apartment house (5+ units)
$32.5M
+0.4%
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 Seatac submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Seatac 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%
by Request
6.5%
by Request
7%
by Request
Alternative Use
Use
Estimation
OFFICE BUILDING
$32,380,000
Current use
APARTMENT HOUSE (5+ UNITS)
$32,500,000
Change: +0% · Conversion: Easy
MEDICAL BUILDING
$31,510,000
Change: -3% · Conversion: Easy
WAREHOUSE, STORAGE
$27,070,000
Change: -16% · Conversion: Difficult
Blend value · Realmo final
$21.71M
Range $19.53M – $23.88M · ±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
$237 / 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 2022Property tax & assessments
Tax year 2022
Tax billed
$6,486
Tax year 2022
Applied tax rate
2,231.0000
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
Office buildings
Use group
OFFICE BUILDING
Status
Off-Market
Year built
1980
Construction
WOOD
Heating
HEAT PUMP
Stories
3
Total area
91,636 SF
Lot
4.18 ac (181,957 SF)
Zoning code
RBX
APN
344500-0115
UPID
US90-1633457
Jurisdiction
KING
Metro division
SEATTLE-BELLEVUE-EVERETT, WA METROPOLITAN DIVISION
Zoning & alternative use
RBX · Seatac, WA
Zoning RBX · permitted uses
RBX · Seatac, WA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Seatac. Always verify with local authorities before improvements.
Alternative use value scenarios
Repositioning upside vs current use
OFFICE BUILDING Current
Est. value
$32.4M
APARTMENT HOUSE (5+ UNITS)
Est. value
$32.5M
MEDICAL BUILDING
Est. value
$31.5M
WAREHOUSE, STORAGE
Est. value
$27.1M
OFFICE BUILDING Current
APARTMENT HOUSE (5+ UNITS)
MEDICAL BUILDING
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
1980
Construction
WOOD
Heating
HEAT PUMP
Stories
3
Lot
4.18 ac
Current owner
From public records · entity-resolved
Department Of Transportation
Entity
Free & Clear · 5 yrs held
Mailing address
PO BOX 47338, OLYMPIA, WA 98504-7338
Ownership since
2020
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
2 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Jul 27, 2020
—
Department Of Transportation
Alaska Airlines INC
Quit Claim Deed
related
—
Jun 8, 2015
—
Central Puget Sound Regional T
Alaska Airlines INC
Quit Claim Deed
related
—
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
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“Is 15.6% cap rate sustainable?” · “Best tenant mix for BU1?” · “What’s the redev upside?”
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