Entity Owned 
For Lease
1 / 12
$20 SF/Yr
420 Washington St, Boston, MA 02124
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Property profile
Verified
Property type
Medical Office Space
Use group
MEDICAL BUILDING
Year built
1920
Construction
FRAME
Total area
3,812 SF
Lot
0.22 ac (9,623 SF)
Zoning code
C
APN
DORC W:17 P:02419 S:000
UPID
US38-0815411
Cap rate & NOI
Priority signal for investors
Implied cap rate, NOI & suggested price
Cap rate vs submarket · NOI estimate · 3 price anchors
Current use
Occupant on record · Public records
-
Employment Agency
-
Counselor
Location
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$295k
CAP Approach
CAP
by Request
Comparable Approach
Comparable
by Request
Blend (final)
Blend
$270k
Owner & transaction history
since 2025
7 recorded transactions
Zoning & alternative use
C · Dorchester Center, MA
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
Value estimation
Instant AI valuation built from comps, income signals, and proprietary benchmarks. A defensible range, not a single guess.
17% off on annual
Unlock the complete Valuation workflow
Full NOI reconstruction, selected comps, alternative-use scenarios, data audit and PDF export.
Full NOI build-up · 6 steps
Sensitivity value band
Source audit · 6 inputs
PDF export
Analytics Standard · 5 reports
from $99/month
from $99/month
Summary
1
Valuation conclusion
Included free
Estimated market value
$270k
Value range
$243k – $297k
±10% around blend
Estimated value / SF
$71 / SF
Confidence
Property data
100
Comparable evidence
60
Income certainty
100
$243k
blend $270k
$297k
Market-derived valuation under stabilized market assumptions. Desktop analysis. No physical inspection performed.
2
Subject property
Included free
GBA
3,812 SF
Lot area
0.22 ac
Year built
1920
Stories
3
APN
DORC W:17 P:02419 S:000
Zoning
C
Assessed value
$733,000
Annual tax
$18,523
3
Income approach: direct capitalization
Partial preview
Estimated Stabilized NOI, derived from market rent, vacancy and expense benchmarks. Actual property income not reported.
Estimated market rent / SF
Potential gross income
Vacancy allowance
Effective gross income
Benchmark operating expenses
Stabilized NOI
Property tax
$18,523
Selected cap rate
4
Sales comparison
Partial preview
Too few qualifying comparables for a sales-approach estimation.
5
Sensitivity & risk
Partial preview
Downside
−10%
Base
$270k
Upside
+10%
Bounds of the ±10% band vs the blend — never simulated scenarios.
6
Data & methodology
Included free
Building area
County record
Property tax
County record
Assessed value
County record
Zoning designation
County record
Operating expenses
Modeled
Market rent
Market benchmark
Not analyzed due to unavailable source data: actual rent roll, tenant leases, physical condition and capital
requirements are outside a desktop analysis.
Cost Approach excluded: income and sales evidence cover the value conclusion.
Automated valuation analysis, not a licensed appraisal. Figures are derived from public
records and proprietary models. Desktop analysis: no physical inspection, tenant leases or reported
property income. Verify with a licensed appraiser before transacting.
Cap rate
Cap rate calculated from real income and expense signals, benchmarked against sales of similar assets nearby.
17% off on annual
Unlock the complete Cap Rate workflow
Full market tables, editable assumptions, comparable evidence, saved work and exports.
9-scenario matrix
NOI build-up · 9 steps
Market rates by use type
PDF export
Analytics Standard · 5 reports
from $99/month
from $99/month
Overview
No cap rate is computable for this property yet: no recorded sale, income signal or market-rate row for its use type.
Price sensitivity
The rate is the decision lever; valuation is the consequence.
Test a cap rate
Implied value$1.61M
Move the market yield to see immediate price impact.
Value / SF
$421
Vs. selected
Base
Derivation
NOI ÷ cap
Arithmetic over the derived NOI * — not market scenario modeling.
NOI × cap matrix
Preview
Preview of 9 modeled outcomes.
NOI
5.00%7.00%9.00%
$101k
$2.02M
$1.45M
$1.12M
$112k
$2.25M
$1.61M
$1.25M
$124k
$2.47M
$1.77M
$1.37M
NOI sensitivity ±10% across the 5 / 7 / 9% anchors — derivation of the NOI above.
Property tax & assessments
Tax year 2024Property tax & assessments
Tax year 2024
Tax billed
$18,523
Tax year 2024
Assessed value
$733,000
Assessed 2024
Previous assessed
$770,900
-4.9% YoY
Effective rate
2.53%
On assessed value
Assessed land
$331,900
Assessed improvement
$401,100
Automated cap rate analysis. Based on public records, market benchmarks and proprietary
models. Verify with a licensed professional before transacting.
Property description
Physical attributes from public recordsBuilding & lot
Public records
Property type
Medical Office Space
Use group
MEDICAL BUILDING
Status
For Lease
Year built
1920
Construction
FRAME
Heating
NONE
Buildings
1
Stories
3
Units
2
Total area
3,812 SF
Lot
0.22 ac (9,623 SF)
Zoning code
C
APN
DORC W:17 P:02419 S:000
UPID
US38-0815411
Jurisdiction
BOSTON
Metro division
BOSTON-QUINCY, MA METROPOLITAN DIVISION
Zoning & alternative use
C · Dorchester Center, MAZoning C · permitted uses
C · Dorchester Center, MA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Building & site characteristics
From public records
Year built
1920
Construction
FRAME
Heating
NONE
Stories
3
Buildings
1
Units
2
Lot
0.22 ac
Zoning
The recorded zoning designation, what the district officially allows, and the municipal source it comes from.
Zoning designation
County-recorded code
C
Jurisdiction
Dorchester Center, MA
Recorded code
C
Ownership Intelligence
Find the owner behind the property.
Unlock the evidence behind ownership: portfolio, transactions, debt and signals that help you decide who to contact next.
What opens after registration
Ownership report
Owner identityResolved entity and name variants
Portfolio holdingsLinked properties and estimated value
Deal signalsSell-side activity worth following
Debt & historyRecorded loans and transaction history
Private report access
See the ownership record for this address.
Registration is required before any owner information is shown.
One complete report on every paid plan · 5 · 30 · 100 reports per month.
Owner of record and activity signals are derived from public records and modeled classifications.
They do not confirm beneficial ownership or intent to transact.
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Ask anything about this address in plain English.
“Is 15.6% cap rate sustainable?” · “Best tenant mix for BU1?” · “What’s the redev upside?”
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