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Two-Home Duplex Property
For Sale
$575,000

151 /155 Mill Brook Rd, Thornton, NH 03285

Separate residences provide flexible living arrangements, private utilities, and access to White Mountains recreation near I-93.

Property Size2,260 SF
Price / SF$254.42
Days on Market31

Property Features for 151 /155 Mill Brook Rd

General Information

Standard status Active
Size 2,260 SF
Property subtype Multi-Family

Site & Location

Highway Access Yes
Utilities to Site Yes

Additional Details

Multifamily Units 2

Building Details

Year Built 2005
Buildings 2
Listing Agency: Keller Williams Realty Metro-Concord
Listed By: Melissa Perrault
Source: Carolslocum
Added: Jul 31 Changed: Aug 29 Last Checked: Aug 25 at 4:15AM

Displayed information is deemed reliable but is not guaranteed and should be independently verified. All listing content including descriptions, pricing, images are the copyrighted material of Keller Williams Realty Metro-Concord

Investment Insights

Based on property information with market context.

This duplex property combines two separate residences on approximately 1+/- acre in Thornton. The main home offers approximately 1,300 sq. ft., two bedrooms plus bonus space, an open living area, first-floor bedroom, full bath, laundry, mini split, metal roof, portable generator, wood stove, and electric baseboard heat. A second residence provides approximately 1,032 sq. ft., two bedrooms, a 3/4 bath, loft-style bonus area, open living, kitchen, and dining areas, first-floor laundry, forced hot air heat, and a metal roof.

Each home has separate utilities, while the property is served by private water and septic systems. The location is minutes from I-93 and near hiking, skiing, golf, snowmobiling, ATV trails, kayaking, tubing, fishing, Owl’s Nest Resort, Waterville Valley, and Loon Mountain.

Key Highlights

  • Two separate residences on approximately 1+/- acre
  • Main home offers approximately 1,300 sq. ft. with 2 bedrooms plus bonus space
  • Second home provides approximately 1,032 sq. ft. with 2 bedrooms and a loft‑style bonus area

Financial Insights

Estimated NOI and Cap Rate

NOI = area × lease_rate × (100 − vacancy) / 100 × (1 − expense_ratio). Net Operating Income — what the owner takes home each year before mortgage payments and income tax. Effective rent (asking rent minus vacancy losses) minus operating costs (taxes, insurance, maintenance, management).
NOI / Yr
$22,425
Cap rate = NOI / list price × 100. Capitalization rate — annual return on a fully cash purchase, before financing. NOI divided by price. Higher means more income per dollar invested, but usually also more risk or older condition. 5–8% is typical for stabilized commercial property; double digits often signal distressed deals.
Cap Rate
3.90%
Suggested Prices Based on Cap Rates Cap rates vary significantly by property type, market, and asset quality. Typical U.S. stable-market ranges: Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+) Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand) Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically) Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher) Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk) Self-Storage — 5.5% to 7.5% Medical Office — 6.0% to 7.5% Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term Rules of thumb: Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%). Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C. Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI. Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$448,500 $448.5K
Cap Rate 7%
$320,357 $320.4K
Cap Rate 9%
$249,167 $249.2K
Market Conditions
NOI Build-Up for 2,260 SF 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.
Gross rent
$33.9K $15.00/SF
− Vacancy
−$1.9K −$0.83/SF
EGI
$32.0K $14.17/SF
− OpEx
−$9.6K −$4.25/SF
NOI
$22.4K $9.92/SF
Area
Grafton County, NH
Vacancy
5.50%
Lease Rate
$15.00 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates Cap rates vary significantly by property type, market, and asset quality. Typical U.S. stable-market ranges: Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+) Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand) Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically) Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher) Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk) Self-Storage — 5.5% to 7.5% Medical Office — 6.0% to 7.5% Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term Rules of thumb: Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%). Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C. Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI. Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$448,500
Cap Rate 7%
$320,357
Cap Rate 9%
$249,167

Alternative Uses

Best Use
Multifamily LT 5
$320.4K
$280.3K – $373.8K (±1% cap)
NOI $22,425 @ 7.0% cap · market cap 3.90%
Second Best
Apartment 5plus
$293.5K
$256.8K – $342.5K (±1% cap)
NOI $20,547 @ 7.0% cap · market cap 3.57%
Theoretical Best
Office A
$497.1K
$435.0K – $580.0K (±1% cap)
NOI $34,799 @ 7.0% cap · market cap 6.05%
Zoning and permitted uses should be independently verified with authorities.

Property Analytics

Current Use

Duplexes

Suggested Use

Top Pick Spa & Massage Center Restaurant

Score = modeled unmet demand for each use within ~1 mi (higher = bigger opportunity). Zoning and permitted uses should be independently verified with local authorities.

Lease Details

2
Residential units
Yes
Highway access
Yes
Utilities to site

Location Intelligence

Trade Area within ½ mile

1
Businesses Nearby

Demographics for 03285, NH

2,708
Population
1,982
Households
1.4
Avg Household Size
50
Median Age
42%
College-Educated
99%
High-School Grad
50.1 sq mi
ZIP Area
54
Density / Sq Mi
$81,094
Median Household Income
$45,099
Median Earnings
$1,269
Median Rent
$289,700
Median Home Value

Market

Vacancy Rate% for Multifamily in Northeast region

4% 2022
4.6% 2023
5.3% 2024
5.6% 2025
Rey
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Frequently Asked Questions

What type of property is this?
Duplex - Separate residences provide flexible living arrangements, private utilities, and access to White Mountains recreation near I-93.
Where is this duplex located?
The property is located at 151 /155 Mill Brook Rd Thornton, NH.
What is the asking price?
The asking price for this property is $575,000.
What are key features of this property?
This property features: Two separate residences on approximately 1+/- acre; Main home offers approximately 1,300 sq. ft. with 2 bedrooms plus bonus space; Second home provides approximately 1,032 sq. ft. with 2 bedrooms and a loft‑style bonus area
More about this property
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