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Duplex with Private Entrances

18 Brook Street Derry, NH 03038

New
18 Brook Street, Derry, NH, 03038
$599,900
For Sale
Claim this Listing
$599,900

MULTI_FAMILY - Other - Derry, NH

Property Size2,367 SF
Lot Size0.24 Acres
Price / SF$253.44
AddedJul 13
Days on Market2
Last RefreshJul 14 at 3:06 pm

Property Features for 18 Brook Street

General Information

Property type
Residential Multi Family
Property subtype
Other
Zoning
MHDR
Bedrooms
6
Bathrooms
3
Rooms
Bathroom 1, Bathroom 2, Bedroom 3, Bedroom 4, Bathroom 3, Bedroom 1, Bedroom 6, Bedroom 2, Basement, Bedroom 5
Patio and Porch features
Deck
Exterior features
Deck
Standard status
Active
Size
2,367 SF
Lot size
0.24 Acres

Taxes and HOA fees

Tax Year
2025
Tax Annual Amount
8555

Utilities

Utilities
Cable Available
Heating system
Oil, Ductless (Heating)
Cooling system
Zoned, Central Air, Ductless
Water source
Public

Building Details

Year built
1920
Floors in Building
2
Number of units
2
Flooring type
Carpet, Hardwood, Vinyl
Building materials
Wood Frame
Roof type
Shingle
Architectural style
Other

Listing agent Samuel Auffant

Listing office KW Coastal and Lakes & Mountains Realty 750 Lafayette Rd., Portsmouth, NH

Listing date Jul 13, 2026

MLS# 5099636 Listing URL

Copyright © 2026 PrimeMLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.


Investment Insights

Based on property information with market context.

This well-maintained duplex offers private entrances and parking for each unit. The property includes a 4-bedroom unit and a 2-bedroom unit, each with its own private deck. Interior details noted in the listing include hardwood floors in the 4-bedroom unit and new kitchen countertops, along with cosmetic updates for that unit completed over the past few years. Updates to the exterior include siding and roofing in 2021, and the utility systems are described as in great working order.

The building is situated on a lot of more than half an acre and is zoned MHDR. The listing reports the duplex is currently producing just over $51K in revenue, with almost $40K in profit.

Both units are occupied, and showings are by appointment only. The 2-bedroom unit is described as turnkey, with an option to update to maximize building income.

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 $59.6k $25.20
− Vacancy −$2.7k −$1.13
EGI $57.0k $24.07
− OpEx −$17.1k −$7.22
NOI $39.9k $16.85
2,367 SF · lease $25.20/SF/yr · vacancy 4.50% · expense 30.00%

Alternative Uses

Best Use
Multifamily LT 5
$569.6K
$498.4K – $664.6K (±1% cap)
NOI $39,875 @ 7.0% cap · market cap 6.65%
Second Best
Apartment 5plus
$513.1K
$449.0K – $598.7K (±1% cap)
NOI $35,919 @ 7.0% cap · market cap 5.99%
Theoretical Best
Office A
$788.0K
$689.5K – $919.4K (±1% cap)
NOI $55,163 @ 7.0% cap · market cap 9.20%
Zoning and permitted uses should be independently verified with local authorities.

Property Analytics

Property Profile Location Intelligence

Current Use by Public Records

Duplexes

Suggested Use

Grocery & Convenience Store Parking Lot & Garage Big Box & Wholesale Store Veterinary Clinic (Bike/Boat/Book/etc) Store Garden Center (Bike/Boat/Book/etc) Store (Bike/Boat/Book/etc) Store Computer & Electronic Repair Hotel & Motel

Zoning and permitted uses should be independently verified with local authorities.

FAQs

What type of property is this?
Duplex - Well-maintained duplex offers private entrances and dedicated parking for each unit, with two decks and updated exterior components.
Where is this duplex located?
The property is located at 18 Brook Street Derry, NH.
What is the asking price?
The asking price for this property is $599,900.
Contact an agent
More about this property
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