Entity Owned 
For Lease
1 / 4
$29,545,000
1311 Mamaroneck Ave, White Plains, NY 10605
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Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Total area
326,307 SF
Lot
22.93 ac (998,831 SF)
Zoning code
C-O
APN
551700 138.18-1-3
UPID
US63-6280601
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
-
Law Firm
-
Insurance Agency
-
Corporate Office
-
Postal Service Courier Service
-
Law Firm
Location
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$12.79M
CAP Approach
CAP
by Request
Comparable Approach
Comparable
by Request
Blend (final)
Blend
$29.55M
Owner & transaction history
since 2022
Last sale
$21.0M
7 recorded transactions
Zoning & alternative use
C-O · White Plains, NY
Zoning description
5.5.1.1 The C-O District is a low-density, campus-style predominantly office district 5-70 which is intended to encourage the development of modern "buildings" containing a variety of office and non-residential "uses," a…
General category
COMMERCIAL
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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Unlock the complete Valuation workflow
Full NOI reconstruction, selected comps, alternative-use scenarios, data audit and PDF export.
All 6 comparables with addresses
Sensitivity value band
Source audit · 6 inputs
PDF export
Analytics Standard · 5 reports
from $99/month
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Summary
1
Valuation conclusion
Included free
Estimated market value
$29.55M
Value range
$26.59M – $32.50M
±10% around blend
Estimated value / SF
$91 / SF
Confidence
High
6 county-verified comps
Property data
63
Market benchmarks
67
Comparable evidence
60
$26.59M
blend $29.55M
$32.50M
Market-derived valuation under stabilized market assumptions. Desktop analysis. No physical inspection performed.
2
Subject property
Included free
GBA
326,307 SF
Lot area
22.93 ac
APN
551700 138.18-1-3
Zoning
C-O
Assessed value
$1,000,000
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
$5.01M
Weighted, 6 comps · high confidence
Evidence
6 found · 6 selected
County-verified recorded sales
Comparable
Sale dateSale price$ / SF
20.2 mi away · 405,399 SF
20.4 mi away · 380,000 SF
20.5 mi away · 304,345 SF
20.6 mi away · 367,212 SF
20.6 mi away · 408,130 SF
5
Sensitivity & risk
Partial preview
Downside
−10%
Base
$29.55M
Upside
+10%
Bounds of the ±10% band vs the blend — never simulated scenarios.
6
Current market position
Included free
Benchmark
Observed band ($/SF)AverageSubject delta
Submarket 25 sales
$237
-62%
County 65 sales
$351
-74%
Band = middle half (Q1–Q3) of recorded sale $/SF for this use type per geography; the diamond marks the subject at $91/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
Not available
Assessed value
County record
Zoning designation
County record
Operating expenses
Not available
Market rent
Not available
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: replacement-cost inputs are not on file.
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
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Full market tables, editable assumptions, comparable evidence, saved work and exports.
9-scenario matrix
Comparable evidence · 6 sales
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$21.00M
Move the market yield to see immediate price impact.
Value / SF
$64
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%
$1.32M
$26.46M
$18.90M
$14.70M
$1.47M
$29.40M
$21.00M
$16.33M
$1.62M
$32.34M
$23.10M
$17.97M
NOI sensitivity ±10% across the 5 / 7 / 9% anchors — derivation of the NOI above.
Comparable evidence
Partial preview
Recorded sales nearby
6 found
High confidence · county-verified
Closest comparable
$11.15M
19.6 mi · Dec 2025 · $44/SF
Property tax & assessments
Tax year 2020Property tax & assessments
Tax year 2020
Assessed value
$1,000,000
Assessed 2023
Previous assessed
$1,135,000
-11.9% YoY
Assessed land
$458,650
Assessed improvement
$541,350
Land market value
$19,190,377
Improvement market value
$22,650,628
Total market value
$41,841,005
Applied tax rate
551,700.0000
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
Heating
NONE
Buildings
1
Total area
326,307 SF
Lot
22.93 ac (998,831 SF)
Zoning code
C-O
APN
551700 138.18-1-3
UPID
US63-6280601
Jurisdiction
WESTCHESTER
Metro division
NEW YORK-WHITE PLAINS-WAYNE, NY-NJ METROPOLITAN DIVISION
Zoning & alternative use
C-O · White Plains, NYZoning C-O · permitted uses
C-O · White Plains, NY
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Zoning description
5.5.1.1 The C-O District is a low-density, campus-style predominantly office district 5-70 which is intended to encourage the development of modern "buildings" containing a variety of office and non-residential "uses," a…
General category
COMMERCIAL
Building & site characteristics
From public records
Heating
NONE
Buildings
1
Lot
22.93 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
C-O
COMMERCIAL
Jurisdiction
White Plains, NY
Recorded code
C-O
Official district
C-O
Official district profile
What the municipal code says about C-O
Zoning description
5.5.1.1 The C-O District is a low-density, campus-style predominantly office district 5-70 which is intended to encourage the development of modern "buildings" containing a variety of office and non-residential "uses," a…
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 C-O in White Plains, NY.
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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