Six-Bedroom
For Sale
$1,200,000
39 Derby St, Somerville, MA 02145
Residential Income, Somerville, MA
Property Size3,426 SF
Lot Size0.09 Acres
Price / SF$350.26
Days on Market93
Property Features for 39 Derby St
General Information
Property type
Residential Multi Family
Property subtype
Other
Zoning
NR
Bedrooms
6
Bathrooms
3
Full bathrooms
3
Rooms
Bedroom 6, Bedroom 4, Bedroom 1, Bedroom 2, Bedroom 3, Bathroom 3, Bathroom 2, Bedroom 5, Bathroom 1
Parking
8
Directions
Please follow GPS
Standard status
Active
APN
757533
Size
3,426 SF
Lot size
0.09 Acres
Taxes and HOA fees
Tax Year
2026
Tax Annual Amount
10266
Amenities
patios
laundry in basement
Building Details
Year built
1920
Floors in Building
4
Number of units
2
Listing Agency:
Keller Williams Realty Boston Northwest
(781) 862-2800
Listed By:
Christina Hill
(978) 369-5775
Added: Jun 4
Changed: Sep 3
Last Checked: Sep 4 at 6:06AM
MLS# 73529871
Copyright © 2026 MLS Property Information Network Inc. 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 3,426-square-foot duplex, built in 1920, contains two residential units with a six-bedroom configuration. The first-floor unit has two bedrooms, a kitchen, and a bathroom, while the second-floor unit offers four bedrooms, a kitchen, and a bathroom. The property is positioned for cosmetic updates and customization, with spacious rooms, a large basement, basement laundry, and two patios. Building systems include two gas hot water heaters, two oil furnaces with forced hot air heating, and two separate electric meters with 100 amps.
Private parking accommodates 6–7 cars. The property is near I-93, the Green and Orange lines, Foss Park, Sullivan T station, Gilman Square, and Assembly Row. Zoning is NR, and the lot measures 0.0861 acres.
Private parking accommodates 6–7 cars. The property is near I-93, the Green and Orange lines, Foss Park, Sullivan T station, Gilman Square, and Assembly Row. Zoning is NR, and the lot measures 0.0861 acres.
Key Highlights
- Two‑unit duplex with six bedrooms across 3,426 square feet
- First‑floor unit has 2 bedrooms; second‑floor unit has 4 bedrooms
- Private parking for 6–7 cars plus 2 patios
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
$72,495
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
6.04%
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%
$1,449,900
$1.4M
Cap Rate 7%
$1,035,643
$1.0M
Cap Rate 9%
$805,500
$805.5K
Market Conditions
NOI Build-Up for 3,426 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
$108.9K $31.80/SF
− Vacancy
−$5.4K −$1.57/SF
EGI
$103.6K $30.23/SF
− OpEx
−$31.1K −$9.07/SF
NOI
$72.5K $21.16/SF
Area
Middlesex County, MA
Vacancy
4.94%
Lease Rate
$31.80 /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%
$1,449,900
Cap Rate 7%
$1,035,643
Cap Rate 9%
$805,500
Alternative Uses
Best Use
Multifamily LT 5
$1.04M
$906.2K – $1.21M
NOI $72,495 @ 7.0% cap · market cap 6.04%
Second Best
Apartment 5plus
$973.8K
$852.1K – $1.14M
NOI $68,166 @ 7.0% cap · market cap 5.68%
Theoretical Best
Office A
$2.03M
$1.77M – $2.37M
NOI $141,973 @ 7.0% cap · market cap 11.83%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Property Profile
Current Use
Lease Details
2
Residential units
Yes
Highway access
Yes
Utilities to site
Location Intelligence
Trade Area within ½ mile
1,586
Businesses Nearby
Explore this area
Business Placement
Demographics for 02145, MA
27,520
Population
12,669
Households
2.2
Avg Household Size
33
Median Age
55%
College-Educated
89%
High-School Grad
1.4 sq mi
ZIP Area
19,657
Density / Sq Mi
$119,167
Median Household Income
$63,629
Median Earnings
$2,377
Median Rent
$784,900
Median Home Value
Market
Vacancy Rate% for Multifamily in Northeast region
Questions? Ask Rey
Realmo’s AI knows this listing — price, zoning, demand, history. Ask anything.
Frequently Asked Questions
What type of property is this?
Duplex - Two residential units include separate kitchens, patios, basement laundry, and private parking for 6–7 cars.
Where is this duplex located?
The property is located at 39 Derby St Somerville, MA.
What is the asking price?
The asking price for this property is $1,200,000.
What are key features of this property?
This property features: Two‑unit duplex with six bedrooms across 3,426 square feet; First‑floor unit has 2 bedrooms; second‑floor unit has 4 bedrooms; Private parking for 6–7 cars plus 2 patios
