Two-Family Residential Income
666 Armstrong Avenue, Staten Island, NY 10308
MULTI_FAMILY - Colonial - Staten Island, NY
Property size:
2,680 SFLot size:
0.13 AcresPrice / SF:
$429/SF- Added:
- Jul 1, 2026
- Days on Market:
- 8
- Last Refresh:
- Jul 8 at 10:06 am
Property Features for 666 Armstrong Avenue
General Information
- Property type
- Residential Multi Family
- Property subtype
- Other
- Zoning
- R3-1
- Bedrooms
- 6
- Bathrooms
- 4
- Rooms
- Bedroom 1, Bathroom 5, Bedroom 2, Bedroom 5, Bathroom 1, Bathroom 3, Bedroom 6, Bathroom 2, Bedroom 4, Bathroom 4, Bedroom 3
- Parking features
- Driveway, On Street
- Patio and Porch features
- Deck, Patio
- Interior features
- Walk-In Closet(s), Ceiling Fan(s)
- Basement
- Partially Finished, Full
- Standard status
- Active
- APN
- 5054830051
- Size
- 2,680 SF
- Lot size
- 0.13 Acres
Taxes and HOA fees
- Tax Annual Amount
- 8233
Utilities
- Sewer type
- Public Sewer
- Heating system
- Forced Air, Natural Gas
- Cooling system
- Central Air
Building Details
- Year built
- 1970
- Floors in Building
- 2
- Number of units
- 2
- Building materials
- Brick, Vinyl Siding
- Architectural style
- Colonial
Listing agent John E Martelotti (917) 217-0599
Listing office Keller Williams Realty Staten Island 1919 Hylan Blvd., Staten Island, NY (718) 766-7159
Listing date Jul 1, 2026
MLS# 2603723
Listing URL
Copyright © 2026 Staten Island Board of Realtors. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
HighLights
- 6‑over‑6 two‑family home in the Great Kills area with six rooms per unit, including formal living and dining, and an eat‑in kitchen
- Each unit features a full bathroom plus a primary bedroom with a private half bathroom and two additional bedrooms with closet space
- Hardwood floors throughout; walk‑in closets and ceiling fan(s) included
- Brick and vinyl siding exterior with natural gas forced‑air heat and central air conditioning
- Full basement with laundry access, storage, and half bathroom plus plumbing set up for an additional kitchen
- New roof (2023), plus a large private driveway, patio, and deck; public sewer
Overview
This well-maintained two-family residence at 666 Armstrong Avenue features a classic 6-over-6 layout, with both floors offering six nicely proportioned rooms. Each unit includes a formal living room, formal dining area, eat-in kitchen, full bathroom, a primary bedroom with a private half bathroom, and two additional bedrooms with ample closet space. Hardwood floors run throughout the home. The property also includes a full basement with storage and laundry access, and the full floor basement has a half bathroom plus plumbing set up for an additional kitchen.
The home sits on an extra deep lot with a large private driveway, providing outdoor space and off-street parking. A new roof was installed in 2023, supporting the property’s ongoing maintenance.
For buyers or operators seeking a turnkey two-family setup, the unit-by-unit floor plan offers practical separation with multiple bedrooms and dedicated baths on each level. The basement’s storage and laundry access, along with existing plumbing for an added kitchen, can also support flexible day-to-day use or future interior improvements, subject to applicable approvals.
The home sits on an extra deep lot with a large private driveway, providing outdoor space and off-street parking. A new roof was installed in 2023, supporting the property’s ongoing maintenance.
For buyers or operators seeking a turnkey two-family setup, the unit-by-unit floor plan offers practical separation with multiple bedrooms and dedicated baths on each level. The basement’s storage and laundry access, along with existing plumbing for an added kitchen, can also support flexible day-to-day use or future interior improvements, subject to applicable approvals.
Local Financial Insights For Multifamily LT 5
Simulate Cap Rate and NOI
NOI Build-Up
- Vacancy
- income lost from leasable area expected to sit empty during the year — subtracted from gross rent.
- EGI (Effective Gross Income)
- gross rent minus vacancy losses — the realistic income before paying operating costs.
- OpEx (Operating Expenses)
- recurring costs to operate the property (property tax, insurance, utilities, maintenance, management) — excludes financing and capital improvements.
- NOI (Net Operating Income)
- income a property generates after operating costs but before financing and taxes.
| Component | $ | $/SF |
|---|---|---|
| Gross rent | $99.7k | $37.20 |
| − Vacancy | −$4.5k | −$1.67 |
| EGI | $95.2k | $35.53 |
| − OpEx | −$28.6k | −$10.66 |
| NOI | $66.6k | $24.87 |
2,680 SF · lease $37.20/SF/yr · vacancy 4.50% · expense 30.00%
Alternative Uses
Best Use
Multifamily LT 5
$952.1K
$833.1K – $1.11M
NOI $66,647 @ 7.0% cap · market cap 5.80%
Second Best
Apartment 5plus
$849.0K
$742.9K – $990.5K
NOI $59,432 @ 7.0% cap · market cap 5.17%
Theoretical Best
Office A
$1.28M
$1.12M – $1.49M
NOI $89,513 @ 7.0% cap · market cap 7.78%
Zoning and permitted uses should be independently verified with local authorities.
Property Profile
Location Intelligence
Current Use by Public Records
Duplexes
Location Insight
- Map
- Local Demand
- City
- Staten Island
- County
- Richmond
- State
- New York
- Longitude
- -74.160633
- Latitude
- 40.550893
Nearby Similar for Sale
FAQs
What type of property is this?
Duplex - Well-maintained two-family with a classic 6-over-6 layout, hardwood floors, and a full basement plus laundry access.
Where is this duplex located?
The property is located at 666 Armstrong Avenue Staten Island, NY.
What is the asking price?
The asking price for this property is $1,150,000.
What are key features of this property?
This property features: 6‑over‑6 two‑family home in the Great Kills area with six rooms per unit, including formal living and dining, and an eat‑in kitchen; Each unit features a full bathroom plus a primary bedroom with a private half bathroom and two additional bedrooms with closet space; Hardwood floors throughout; walk‑in closets and ceiling fan(s) included
