21 Beacon St 3G Boston, MA 02108-2805
Entity Owned
4-yr Hold
~
Est. High Equity
Estimated value (blended)
$1.41M
Range $1.27M – $1.55M (±10%)
Implied cap rate
3.30%
In-place · NOI ÷ last sale
Property ID
US38-1263673
Property profile
Verified
Property type
Commercial real estate
Use group
COMMERCIAL CONDOMINUIM
Total area
1,882 SF
Lot
0.04 ac (1,882 SF)
Zoning code
CC
APN
CBOS W:03 P:02807 S:322
UPID
US38-1263673
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
-
Gym & Fitness Center Alternative Medicine Practice
-
Housing Cooperative
-
Business Management Consultant
-
Law Firm
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$1.40M
CAP Approach
CAP
by Request
Comparable Approach
Comparable
$1.35M
Blend (final)
Blend
$1.41M
Owner & transaction history
since 2022
Last sale
$1.7M
1 recorded transaction
Zoning & alternative use
CC · Boston, 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.
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Full NOI reconstruction, selected comps, alternative-use scenarios, data audit and PDF export.
All 16 comparables with addresses
4 alternative uses screened
Sensitivity value band
Source audit · 10 inputs
PDF export
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Summary
1
Valuation conclusion
Included free
Estimated market value
$1.41M
Value range
$1.27M – $1.55M
±10% around blend
Estimated value / SF
$749 / SF
Confidence
High
16 county-verified comps
Property data
63
Market benchmarks
100
Comparable evidence
100
$1.27M
blend $1.41M
$1.55M
Market-derived valuation under stabilized market assumptions. Desktop analysis. No physical inspection performed.
2
Subject property
Included free
GBA
1,882 SF
Lot area
0.04 ac
APN
CBOS W:03 P:02807 S:322
Assessed value
$975,300
Annual tax
$24,646
3
Income approach: direct capitalization
Partial preview
Not enough income data on file for a CAP-approach estimation.
4
Sales comparison
Partial preview
Sales approach indication
$800k
Weighted, 16 comps · high confidence
Evidence
16 found · 6 selected
County-verified recorded sales
Comparable
Sale dateSale price$ / SF
3.6 mi away · 2,145 SF
3.6 mi away · 2,145 SF
3.6 mi away · 2,145 SF
3.8 mi away · 1,900 SF
4.9 mi away · 2,332 SF
5
Sensitivity & risk
Partial preview
Downside
−10%
Base
$1.41M
Upside
+10%
Bounds of the ±10% band vs the blend — never simulated scenarios.
6
Current market position
Included free
Benchmark
Observed band ($/SF)AverageSubject delta
ZIP 24 sales
$633
+18%
Submarket 529 sales
$482
+56%
County 599 sales
$441
+70%
Band = middle half (Q1–Q3) of recorded sale $/SF for this use type per geography; the diamond marks the subject at $749/SF. Delta below average reads as headroom. Source: Realmo CRE sales derivatives (county records).
7
Data & methodology
Included free
Building area
County record
Property tax
County record
Assessed value
County record
Zoning designation
Not available
Operating expenses
Not available
Market rent
Not available
Actual rent roll
Not available
Tenant leases
Not available
Physical condition
Not inspected
Conversion costs
Not available
Not analyzed due to unavailable source data: tenant leases, physical condition and capital
requirements were not available for this desktop analysis. Cost Approach excluded due to
availability of income evidence.
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.
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Unlock the complete Cap Rate workflow
Full market tables, editable assumptions, comparable evidence, saved work and exports.
9-scenario matrix
Comparable evidence · 16 sales
Market rates by use type
PDF export
Analytics Standard · 5 reports
from $99/month
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Overview
Implied cap rate
3.30%
Implied, in-place cap rate for this commercial real estate
Estimated NOI ÷ last recorded sale. Refine with your own numbers in the full report.
Lower yield / higher price
Higher yield / lower price
5.0%
This property · 3.30%
9.0%
NOI (est.)
$119k *
Last sale · Mar 2022
$1.70M
* derived from a real price signal at a 7% cap
Price sensitivity
The rate is the decision lever; valuation is the consequence.
Test a cap rate
Implied value$3.61M
Move the market yield to see immediate price impact.
Value / SF
$1,916
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
2.80%3.30%3.80%
$107k
$3.83M
$3.25M
$2.82M
$119k
$4.25M
$3.61M
$3.13M
$131k
$4.68M
$3.97M
$3.44M
NOI sensitivity ±10% across the selected-rate band (±0.5 pp) — derivation of the NOI above.
Comparable evidence
Partial preview
Recorded sales nearby
16 found
High confidence · county-verified
Closest comparable
$835k
0.6 mi · Jan 2026 · $564/SF
Property tax & assessments
Tax year 2024Property tax & assessments
Tax year 2024
Tax billed
$24,646
Tax year 2024
Assessed value
$975,300
Assessed 2024
Previous assessed
$1,006,100
-3.1% YoY
Effective rate
2.53%
On assessed value
Assessed improvement
$975,300
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
Commercial real estate
Use group
COMMERCIAL CONDOMINUIM
Status
Off-Market
Heating
NONE
Buildings
1
Total area
1,882 SF
Lot
0.04 ac (1,882 SF)
Zoning code
CC
APN
CBOS W:03 P:02807 S:322
UPID
US38-1263673
Jurisdiction
BOSTON
Metro division
BOSTON-QUINCY, MA METROPOLITAN DIVISION
Zoning & alternative use
CC · Boston, MAZoning CC · permitted uses
CC · Boston, MA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Alternative use value scenarios
Repositioning upside vs current use
Alternative use deep dive — conversion cost, permits, timeline
Conversion cost estimate · Permit path & risks · Stabilized NOI per option
Building & site characteristics
From public records
Heating
NONE
Buildings
1
Lot
0.04 ac
Zoning
The recorded zoning designation, what the district officially allows, and the municipal source it comes from.
Zoning designation
County-recorded code
CC
Jurisdiction
Boston, MA
Recorded code
CC
Zoning Insight
What can be built and operated here — officially.
The district profile from the municipal source: what is on file for CC in Boston, MA.
What opens after registration
Zoning profile
Official documentVerified municipal sources with file download
Match provenanceAssignment basis, match tier and confidence
Private report access
See the official zoning profile for this address.
Registration is required before the official district profile is shown.
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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.
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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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