The Allen Residence. Built in 1922 on Boulder's historic Mapleton Hill, this Craftsman bungalow is a legally conforming duplex, income-ready from day one. The main home features original Douglas Fir floors, 6 panel doors, Craftsman casework, 3 beds, 2 3/4 baths, a covered front porch on tapered brick piers, and a skylit finished attic with charming flex space. Tucked below is a fully finished walk-out garden level apartment, a true second unit with its own private, entrance on the east side and separately metered is ready for a tenant, guests, or a standalone private suite. Out back, a detached 3-car garage (rare on this end of Mapleton Hill) is topped by a 612 SF studio currently with a half bath, convertible to full, with light and bright, living space under current Boulder zoning for a third income stream. RMX-1 zoning supports single-family, duplex, or triplex use across the property's two structures. The finished interior living space totals 3,252 SF, with an additional 374 SF of outdoor living space, 612 SF of parking, with a complimentary 120 SF in the storage shed. All major systems have been updated during current ownership, including electrical, plumbing, hot water heat, windows, and roof. Highly walkable location (87 Walk Score) places the Ideal Market, North Boulder Park, Mount Sanitas, downtown Boulder and Pearl Street, Boulder Creek Path, CU Boulder, and an RTD bus route all within an easy walk or bike ride. The home sits next door to one of Boulder's architecturally acclaimed buildings designed by Charles Haertling, originally known as the Boulder Valley Eye Clinic. This is a rare shot at owning a piece of Boulder history with real, flexible upside.
Property Details
- Interior
- Eat-in Kitchen, Open Floorplan
- Cooling
- Air Conditioning-Room
- Heating
- Hot Water
- Cooling Features
- Air Conditioning-Room
- Bedrooms
- 4
- Bathrooms
- 4.25
- Full Baths
- 3
- Half Baths
- 1
- 3/4 Baths
- 1
- Lot Features
- Rolling Slope, Sprinklers In Front
- Stories
- 1
- Lot Description
- Rolling Slope, Sprinklers In Front
- Exterior Features
- Balcony
- Exterior Materials
- Balcony
- Acres
- 0.1
- Square Feet
- 3252
- Parking Spaces
- 3
- Parking Type
- Garage
- Parking Garage Spaces
- 3
- Property Type
- Purchase
- Style
- Cottage
- Basement
- 1
- Basement Description
- Full, Walk-Out Access
- Year Built
- 1922
- Roof
- Composition
- Sewer Information
- Public Sewer
- Utility Source
- Public
- Utility Features
- Electricity Available, Natural Gas Available
- Appliances
- Dishwasher, Disposal, Dryer, Microwave, Oven, Refrigerator, Washer
- Subdivision
- Mapleton Hill
- School District
- Boulder Valley RE 2
- Elementary School
- Whittier E-8
- Middle School
- Casey
- High School
- Boulder
- County
- BOULDER
- Region
- Boulder
- Zoning
- RMX-1
Location
Legal
Based on information submitted to the MLS GRID as of 2026-09-03T22:52:29Z UTC. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.
Provided By
Listed by Joe Bennell (#50a97533c2538a70f6e7d7871a349679)
Listing Office: The Colorado Group
Legal Notice
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Buyer Agency Compensation
The listing broker’s offer of compensation is made only to participants of the MLS where the listing is filed.
