Duplexes for Sale in Boulder, CO

Live simply in Downtown Boulder! Small duplex just off of Mapleton Hill, this charming investment property pairs historic character with rental income potential, allowing for affordable Downtown living. Live in one side, rent the other, rental income can offset your mortgage by $1,325/ month. A current rental license is in place through June 21, 2026. Unit 900 offers a one-bedroom, one-bath

John McElveen milehimodern - Boulder

Newly remodeled 1/2 duplex in turnkey condition. 1 level living at its best in this incredibly quiet North Boulder location; nobody above you, only 1 shared wall and no stairs. High ceilings in the main room and light-filled with southwest exposure, Foothills views, and a quaint patio. Fabulous investment opportunity. HOA allows for short term rentals minimum 30 days (rare to find). Property has

Laurie Kaufman milehimodern - Boulder

LAND + FLEXIBILITY IN WHITTIER UNDER $1.2M On a quiet, tree-lined street that dead-ends at Bluff, with mature trees, peek-a-boo Flatirons views, and walkable to Pearl Street Mall. This is a rare opportunity to own land + flexibility in Whittier, one of Boulders most desirable, character-rich neighborhoods, where many alternatives at this price point are condos or HOA-constrained. The 6,000 sq ft

Amy Alexander Matrix Real Estate LLC

This property is zoned RL-2 allowing detached dwelling units, duplexes, and townhome. This is a .27 acre lot in central Boulder. This classic 3 bed 2 bath + study home sits on one of the largest lots in central Boulder and has many options. This is an excellent opportunity to live in, update, rent, expand, create 2 detached dwelling units, a duplex or townhomes. (Confirm with city.) The detached

Andrea Medaugh Bold Realty

Situated on an exceptionally large 0.47-acre parcel this is a rare chance to secure one of the larger residential lots in the neighborhood. The size and configuration of the site may also present subdivision potential, The cash flowing duplex offers an investor, builder, or custom home buyer reliable income while submitting plans to the city. Don't miss a beat building your custom home (or two!)

Eric Jacobson Compass - Boulder

Fully remodeled half-duplex with a light-filled open floor plan and upgraded finishes throughout. In addition to full cosmetic overhaul, other improvements include new windows, roof, electrical, and mechanical systems. Enjoy mountain views from multiple rooms and a spacious deck off the primary bedroom. The private yard backs directly to open space and the Boulder County trail system.A full

Marina Jensen Posh Realty

Rare Boulder development opportunity: 0.76 acres in North Boulder's Crestview West neighborhood with both immediate livability and remarkable buildout potential. Under the city's 2025 transit corridor zoning reforms, this RR-1 parcel qualifies for a duplex or two single-family residences on the same lot - no subdivision required. Generous FAR (6,593 sq ft above-grade) plus full basements excluded

Jill Grano milehimodern - Boulder

Prime Central Boulder investment! Unlock a golden opportunity in the heart of Boulder with this classic 1967 side-by-side brick duplex. Perfectly situated in Central Boulder, the property delivers both strong rental income and future potential. Each unit is currently leased at $3,000/month, and the detached garage provides an additional $480/month - with room to increase rents over time. Inside,

Jed MacArthur RE/MAX of Boulder, Inc