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21 Central St, Andover, MA 01810
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Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1795
Construction
FRAME
Total area
7,279 SF
Lot
0.6 ac (26,005 SF)
Zoning code
GB
APN
ANDO M:00055 B:00047 L:00000
UPID
US38-0227528
Cap rate & NOI
Priority signal for investors
Implied cap rate, NOI & suggested price
Cap rate vs submarket · NOI estimate · 3 price anchors
Location
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
by Request
CAP Approach
CAP
by Request
Comparable Approach
Comparable
$2.24M
Blend (final)
Blend
$1.98M
Owner & transaction history
since 2015
7 recorded transactions
Zoning & alternative use
GB · Andover, MA
Zoning description
The purpose of this district is to provide general commercial uses
General category
COMMERCIAL
Top alternative use upside
Restaurant
$2.5M
+36.1%
Apartment house (5+ units)
$2.3M
+26.1%
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.
Unlock the complete Valuation workflow
Full NOI reconstruction, selected comps, alternative-use scenarios, data audit and PDF export.
Full NOI build-up · 6 steps
All 8 comparables with addresses
5 alternative uses screened
Sensitivity value band
Source audit · 6 inputs
PDF export
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Summary
1
Valuation conclusion
Included free
Estimated market value
$1.98M
Value range
$1.78M – $2.17M
±10% around blend
Estimated value / SF
$271 / SF
Confidence
High
8 county-verified comps
Property data
100
Market benchmarks
100
Comparable evidence
80
Income certainty
100
$1.78M
blend $1.98M
$2.17M
Market-derived valuation under stabilized market assumptions. Desktop analysis. No physical inspection performed.
2
Subject property
Included free
GBA
7,279 SF
Lot area
0.6 ac
Year built
1795
Stories
1
APN
ANDO M:00055 B:00047 L:00000
Zoning
GB
Assessed value
$1,969,800
Annual tax
$50,191
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
$50,191
Selected cap rate
4
Sales comparison
Partial preview
Sales approach indication
$1.66M
Weighted, 8 comps · high confidence
Evidence
8 found · 6 selected
County-verified recorded sales
Comparable
Sale dateSale price$ / SF
11.5 mi away · 6,000 SF
12.2 mi away · 5,950 SF
12.4 mi away · 8,800 SF
16.6 mi away · 5,580 SF
18.1 mi away · 6,634 SF
5
Sensitivity & risk
Partial preview
Downside
−10%
Base
$1.98M
Upside
+10%
Bounds of the ±10% band vs the blend — never simulated scenarios.
6
Current market position
Included free
Benchmark
Observed band ($/SF)AverageSubject delta
ZIP 22 sales
$254
+7%
Submarket 22 sales
$254
+7%
County 417 sales
$257
+6%
Band = middle half (Q1–Q3) of recorded sale $/SF for this use type per geography; the diamond marks the subject at $271/SF. Delta below average reads as headroom. Source: Realmo CRE sales derivatives (county records).
7
Alternative use screening
Partial preview
Top alternative use
Restaurant
Gross theoretical uplift
+36%
vs current-use indication
Apartment House (5+ Units)
Office Building · current use
Auto Repair, Garage
Retail Stores
Values shown before conversion costs, entitlement costs, capital expenditures and stabilization risk.
8
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.
Unlock the complete Cap Rate workflow
Full market tables, editable assumptions, comparable evidence, saved work and exports.
9-scenario matrix
Comparable evidence · 8 sales
NOI build-up · 9 steps
Market rates by use type
PDF export
Professional Plan · 30 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$2.90M
Move the market yield to see immediate price impact.
Value / SF
$398
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%
$183k
$3.65M
$2.61M
$2.03M
$203k
$4.06M
$2.90M
$2.25M
$223k
$4.46M
$3.19M
$2.48M
NOI sensitivity ±10% across the 5 / 7 / 9% anchors — derivation of the NOI above.
Comparable evidence
Partial preview
Recorded sales nearby
8 found
High confidence · county-verified
Closest comparable
$1.20M
5.0 mi · Jan 2026 · $180/SF
Property tax & assessments
Tax year 2024Property tax & assessments
Tax year 2024
Tax billed
$50,191
Tax year 2024
Assessed value
$1,969,800
Assessed 2024
Previous assessed
$1,792,700
+9.9% YoY
Effective rate
2.55%
On assessed value
Assessed land
$723,200
Assessed improvement
$1,246,600
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
Office buildings
Use group
OFFICE BUILDING
Status
For Lease
Year built
1795
Construction
FRAME
Heating
HOT WATER
Buildings
1
Stories
1
Units
1
Bathrooms
4
Total area
7,279 SF
Lot
0.6 ac (26,005 SF)
Zoning code
GB
APN
ANDO M:00055 B:00047 L:00000
UPID
US38-0227528
Jurisdiction
ANDOVER
Metro division
ESSEX COUNTY, MA METROPOLITAN DIVISION
Zoning & alternative use
GB · Andover, MAZoning GB · permitted uses
GB · Andover, MA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Zoning description
The purpose of this district is to provide general commercial uses
General category
COMMERCIAL
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
Year built
1795
Construction
FRAME
Heating
HOT WATER
Stories
1
Buildings
1
Units
1
Bathrooms
4
Lot
0.6 ac
Zoning
The recorded zoning designation, what the district officially allows, and the municipal source it comes from.
Zoning designation
Matched to the official district catalog
GB
COMMERCIAL
Jurisdiction
Andover, MA
Recorded code
GB
Official district
GB
Official district profile
What the municipal code says about GB
Zoning description
The purpose of this district is to provide general commercial uses
General category
COMMERCIAL
Zoning Insight
What can be built and operated here — officially.
The district profile from the municipal source: what is on file for GB in Andover, MA.
What opens after registration
Zoning profile
Official descriptionThe district text from the municipal code
District factsZone name, category and district area
2 official documentsVerified 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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“Is 15.6% cap rate sustainable?” · “Best tenant mix for BU1?” · “What’s the redev upside?”
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