18 Brook Street Derry, NH 03038
MULTI_FAMILY - Other - Derry, NH
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 (603) 610-8500
Listing office KW Coastal and Lakes & Mountains Realty 750 Lafayette Rd., Portsmouth, NH (603) 610-8500
Listing date Jul 13, 2026
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.
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 |