Entity Owned 
For Lease
1 / 2
Contact for pricing
400 Post Ave, Westbury, NY 11590
View Listing →
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1984
Construction
CONCRETE
Total area
11,479 SF
Lot
1.73 ac (75,359 SF)
APN
10-261-00-0010
UPID
US63-0240950
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
-
Big Box & Wholesale Store
-
Law Firm
-
Law Firm
-
Law Firm
-
Law Firm
Location
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$10.67M
CAP Approach
CAP
by Request
Comparable Approach
Comparable
$13.04M
Blend (final)
Blend
$13.06M
Owner & transaction history
since 2021
Last sale
$10.9M
3 recorded transactions
Zoning & alternative use
Top alternative use upside
Apartment house (5+ units)
$15.1M
+86.5%
Restaurant
$10.2M
+25.8%
Industrial (general)
$10.1M
+25.0%
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
All 7 comparables with addresses
6 alternative uses screened
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
$13.06M
Value range
$11.75M – $14.37M
±10% around blend
Estimated value / SF
$1,138 / SF
Confidence
High
7 county-verified comps
Property data
88
Market benchmarks
33
Comparable evidence
70
Income certainty
100
$11.75M
blend $13.06M
$14.37M
Market-derived valuation under stabilized market assumptions. Desktop analysis. No physical inspection performed.
2
Subject property
Included free
GBA
11,479 SF
Lot area
1.73 ac
Year built
1984
Stories
4
APN
10-261-00-0010
Assessed value
$82,803
Annual tax
$560,882
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
$560,882
Selected cap rate
4
Sales comparison
Partial preview
Sales approach indication
$4.81M
Weighted, 7 comps · high confidence
Evidence
7 found · 6 selected
County-verified recorded sales
Comparable
Sale dateSale price$ / SF
5.2 mi away · 8,721 SF
11.8 mi away · 8,062 SF
13.3 mi away · 14,318 SF
15.7 mi away · 10,320 SF
19.4 mi away · 12,288 SF
5
Sensitivity & risk
Partial preview
Downside
−10%
Base
$13.06M
Upside
+10%
Bounds of the ±10% band vs the blend — never simulated scenarios.
6
Current market position
Included free
Benchmark
Observed band ($/SF)AverageSubject delta
County 295 sales
$706
+61%
Band = middle half (Q1–Q3) of recorded sale $/SF for this use type per geography; the diamond marks the subject at $1,138/SF. Delta below average reads as headroom. Source: Realmo CRE sales derivatives (county records).
7
Alternative use screening
Partial preview
Top alternative use
Apartment House (5+ Units)
Gross theoretical uplift
+87%
vs current-use indication
Restaurant
Industrial (general)
Neighborhood: Shopping Center
Office Building · current use
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
Not available
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
Comparable evidence · 7 sales
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$635k
Move the market yield to see immediate price impact.
Value / SF
$55
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%
$40k
$800k
$572k
$445k
$44k
$889k
$635k
$494k
$49k
$978k
$699k
$543k
NOI sensitivity ±10% across the 5 / 7 / 9% anchors — derivation of the NOI above.
Comparable evidence
Partial preview
Recorded sales nearby
7 found
High confidence · county-verified
Closest comparable
$5.10M
5.0 mi · Mar 2026 · $514/SF
Property tax & assessments
Tax year 2023Property tax & assessments
Tax year 2023
Tax billed
$560,882
Tax year 2023
Assessed value
$82,803
Assessed 2023
Previous assessed
$109,410
-24.3% YoY
Effective rate
677.37%
On assessed value
Assessed land
$19,962
Assessed improvement
$62,841
Total market value
$8,280,300
Applied tax rate
703.0000
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
Year built
1984
Construction
CONCRETE
Heating
FORCED AIR
Cooling
CENTRAL
Stories
4
Total area
11,479 SF
Lot
1.73 ac (75,359 SF)
APN
10-261-00-0010
UPID
US63-0240950
Jurisdiction
NASSAU
Metro division
NASSAU-SUFFOLK, NY METROPOLITAN DIVISION
Zoning & alternative use
Zoning · permitted uses
No zoning code is on file for this parcel. Zoning coverage grows with every catalog release.
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
1984
Construction
CONCRETE
Heating
FORCED AIR
Cooling
Yes
Stories
4
Lot
1.73 ac
Zoning
The recorded zoning designation, what the district officially allows, and the municipal source it comes from.
No zoning code is on file for this parcel. Zoning coverage grows with every catalog release — check back, or open Location Intelligence for use analysis of this corner.
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.
Try Rey
Ask anything about this address in plain English.
“Is 15.6% cap rate sustainable?” · “Best tenant mix for BU1?” · “What’s the redev upside?”
Full reports are paid
Unlock the full Property Analytics report
Pick a plan to open full owner contacts, all 4 valuations with methodology, the refine flow, comparable adjustments, the foot-traffic deep dive and PDF / CSV export. Cancel anytime.
