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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.

DAYS ON MARKET 25 LAST UPDATED 9/3/2026
TRACT Mapleton Hill YEAR BUILT 1922
COMMUNITY Boulder GARAGE SPACES 3.0
COUNTY Boulder STATUS Active
PROPERTY TYPE(S) Single Family

SCHOOLS
Elementary School Whittier
Jr. High School Casey
High School Boulder


ADDITIONAL DETAILS
AIR Wall/Window Unit(s)
AIR CONDITIONING Yes
APPLIANCES Dishwasher, Disposal, Dryer, Electric Range, Gas Range, Microwave, Refrigerator, Washer
AREA Boulder
BASEMENT Full, Partially Finished, Walk-Out Access, Yes
CONSTRUCTION Block, Frame, Stucco
EXTERIOR Balcony
GARAGE Yes
HEAT Hot Water
HOA DUES |
INTERIOR Eat-in Kitchen, Open Floorplan
LOT 4356 sq ft
LOT DESCRIPTION Sloped
LOT DIMENSIONS 4472
PARKING Garage Door Opener, Detached
SEWER Public Sewer
STORIES 1.5
STYLE Cottage, Includes Rental Unit, Legal Conforming
SUBDIVISION Mapleton Hill
TAXES 14768
UTILITIES Natural Gas Available, Electricity Available
WATER Public
MORTGAGE CALCULATOR
   

TOTAL MONTHLY PAYMENT

0
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*Estimate only

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Listing provided by Joe Bennell, The Colorado Group, 3034492131
Last updated: 9/27/26 8:17 AM PDT

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