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Property profile & analytics
OFF-MARKET
Estimated value
$2,025,000
Office buildings
51 Sewall St Portland, ME 04102-2643
Entity Owned
20-yr Hold
~
Est. High Equity
Property ID
US42-0519796
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1984
Total area
12,926 SF
Lot
1.21 ac (52,499 SF)
APN
PTLD M:190 B:D006001
UPID
US42-0519796
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
-
Dr. Joshua Keller Physician
-
Charles Radis Physician
-
Katherine Keller Physician
-
Kenneth Orourke Physician
-
Dr. Melissa Milza Physician
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
by Request
CAP Approach
CAP
by Request
Comparable Approach
Comparable
by Request
Blend (final)
Blend
$2.03M
Owner & transaction history
Rheumatolog Rlty Assoc LP · 20 yrs held
Rheumatolog Rlty Assoc LP
since 2005
2 recorded transactions
Zoning & alternative use
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Commercial (general)
$2.8M
+17.6%
Retail stores
$2.6M
+10.6%
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 Portland submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Portland 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
$2,370,000
Current use
COMMERCIAL (GENERAL)
$2,785,000
Change: +18% · Conversion: Easy
RETAIL STORES
$2,620,000
Change: +11% · Conversion: Moderate
INDUSTRIAL (GENERAL)
$1,935,000
Change: -18% · Conversion: Difficult
Blend value · Realmo final
$2.03M
Range $1.82M – $2.23M · ±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
$157 / 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
Tax billed
$48,089
Tax year 2023
Assessed value
$3,337,200
Assessed 2023
Previous assessed
$3,337,200
+0.0% YoY
Effective rate
1.44%
On assessed value
Assessed land
$725,800
Assessed improvement
$2,611,400
Applied tax rate
60,545.0000
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
1984
Heating
FORCED AIR
Buildings
1
Units
1
Total area
12,926 SF
Lot
1.21 ac (52,499 SF)
APN
PTLD M:190 B:D006001
UPID
US42-0519796
Jurisdiction
PORTLAND
Zoning & alternative use
Zoning · permitted uses
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Alternative use value scenarios
Repositioning upside vs current use
OFFICE BUILDING Current
Est. value
$2.4M
COMMERCIAL (GENERAL)
Est. value
$2.8M
RETAIL STORES
Est. value
$2.6M
INDUSTRIAL (GENERAL)
Est. value
$1.9M
OFFICE BUILDING Current
COMMERCIAL (GENERAL)
RETAIL STORES
INDUSTRIAL (GENERAL)
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
1984
Heating
FORCED AIR
Buildings
1
Units
1
Lot
1.21 ac
Current owner
From public records · entity-resolved
Rheumatolog Rlty Assoc LP
Entity
Mailing address
PO BOX 597, PORTLAND, ME 04112-0597
Ownership since
2005
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
Dec 15, 2005
—
Rheumatolog Rlty Assoc LP
Mcdavitt,stephen C
Grant Deed
related
$1,200,000 · Td Bank NA
—
—
Rheumatology Realty Associates
—
Loan Modification
related
$816,288 · Td Bk NA
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.
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