Three-Unit Residential Income
330 Knox Marsh Road Madbury, NH 03823
330 Knox Marsh Road, Madbury, NH, 03823
$929,000
For Sale
$929,000
MULTI_FAMILY - Colonial - Madbury, NH
Property Size3,230 SF
Lot Size2.76 Acres
Price / SF$287.62
Days on Market16
Property Features for 330 Knox Marsh Road
General Information
- Property type
- Residential Multi Family
- Property subtype
- Other
- Zoning
- RA RE
- Bedrooms
- 5
- Bathrooms
- 4
- Rooms
- Bathroom 4, Bedroom 3, Bedroom 1, Bedroom 2, Bathroom 1, Bedroom 4, Bedroom 5, Bathroom 2, Basement, Bathroom 3
- Parking features
- Garage, Driveway
- Patio and Porch features
- Deck, Porch, Patio
- Exterior features
- Deck, Dog Fence, Full Fence, Garden Space, Natural Shade, Outbuilding, Patio, Porch, Covered Porch
- Fencing
- Fenced
- Appliances
- Oil Water Heater, Separate Water Heater, Water Heater
- Standard status
- Active
- Size
- 3,230 SF
- Lot size
- 2.76 Acres
Taxes and HOA fees
- Tax Year
- 2025
- Tax Annual Amount
- 9431
Utilities
- Utilities
- Propane
- Heating system
- Oil, Pellet Stove, Radiant Floor, Steam, Radiant
- Water source
- Well, Private
Building Details
- Year built
- 1880
- Floors in Building
- 3
- Number of units
- 3
- Flooring type
- Hardwood, Tile
- Building materials
- Clapboard Exterior, Vinyl Siding
- Roof type
- Metal, Shingle
- Architectural style
- Colonial
- Additional Structures
- Outbuilding
Listing agency
KW Coastal and Lakes & Mountains Realty
(603) 610-8500
Listed by
Tanya Cattabriga
(603) 610-8500
Added: Jul 7 Updated: Jul 12 at 6:41AM Checked: Jul 22 at 12:06PM
MLS# 5098516
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 three-unit residential income property at 330 Knox Marsh Road features three separate living units, totaling 5 bedrooms and 3.5 bathrooms. Each unit has its own full kitchen, private entrance, and separate utilities. The home also includes three garage bays, two pellet stoves, and an on-demand generator for year-round backup power. A detached, 320-square-foot heated cabin with heat and electricity adds additional flexibility for storage, workspace, or overflow living.
The property sits on 2.76 acres in Madbury, NH, zoned RA RE. It offers outdoor space with two large fenced pastures that could support hobby farming and small livestock. The setting is directly across from Kingman Farm’s 335 acres of conservation land and walking trails, while still being just minutes to the University of New Hampshire, downtown Dover, Portsmouth, shopping, dining, and major commuter routes.
With multiple ways to use the layout—live in one unit and rent the others, lease all three, or arrange multigenerational living—this triplex is designed for straightforward management and tenant privacy. In the Oyster River School District, the configuration and separate utilities can appeal to both owner-occupants and investors seeking a flexible, low-friction setup.
The property sits on 2.76 acres in Madbury, NH, zoned RA RE. It offers outdoor space with two large fenced pastures that could support hobby farming and small livestock. The setting is directly across from Kingman Farm’s 335 acres of conservation land and walking trails, while still being just minutes to the University of New Hampshire, downtown Dover, Portsmouth, shopping, dining, and major commuter routes.
With multiple ways to use the layout—live in one unit and rent the others, lease all three, or arrange multigenerational living—this triplex is designed for straightforward management and tenant privacy. In the Oyster River School District, the configuration and separate utilities can appeal to both owner-occupants and investors seeking a flexible, low-friction setup.
Key Highlights
- Three‑unit multifamily with 5 bedrooms and 3.5 bathrooms total, plus three garage bays
- Each unit has its own full kitchen, private entrance, and separate utilities for easier management
- Detached 320 SF heated cabin with heat and electricity (shingle/metal roof; utilities include propane)
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 | $48.5k | $15.00 |
| − Vacancy | −$1.6k | −$0.50 |
| EGI | $46.8k | $14.50 |
| − OpEx | −$14.1k | −$4.35 |
| NOI | $32.8k | $10.15 |
3,230 SF · lease $15.00/SF/yr · vacancy 3.32% · expense 30.00%
Alternative Uses
Best Use
Multifamily LT 5
$468.4K
$409.9K – $546.5K
NOI $32,789 @ 7.0% cap · market cap 3.53%
Second Best
Apartment 5plus
$432.0K
$378.0K – $504.0K
NOI $30,241 @ 7.0% cap · market cap 3.26%
Theoretical Best
Office A
$864.1K
$756.1K – $1.01M
NOI $60,489 @ 7.0% cap · market cap 6.51%
Zoning and permitted uses should be independently verified with local authorities.
Property Analytics
Property Profile
Location Intelligence
Current Use by Public Records
Triplexes
FAQs
What type of property is this?
Triplex - Well-maintained triplex with three private units, separate utilities, and detached heated cabin on fenced acreage.
Where is this triplex located?
The property is located at 330 Knox Marsh Road Madbury, NH.
What is the asking price?
The asking price for this property is $929,000.
What are key features of this property?
This property features: Three‑unit multifamily with 5 bedrooms and 3.5 bathrooms total, plus three garage bays; Each unit has its own full kitchen, private entrance, and separate utilities for easier management; Detached 320 SF heated cabin with heat and electricity (shingle/metal roof; utilities include propane)
