For Sale
Single family home for sale at 1125 Maxwell Ave, Boulder, CO 80304 | MLS# IR1067914 | Listing updated on 2026-10-07
Photo 1 of Single family home for sale at 1125 Maxwell Ave, Boulder, CO 80304 | MLS# IR1067914 | Listing updated on 2026-10-07
Photo 2 of Single family home for sale at 1125 Maxwell Ave, Boulder, CO 80304 | MLS# IR1067914 | Listing updated on 2026-10-07
Photo 3 of Single family home for sale at 1125 Maxwell Ave, Boulder, CO 80304 | MLS# IR1067914 | Listing updated on 2026-10-07
Photo 4 of Single family home for sale at 1125 Maxwell Ave, Boulder, CO 80304 | MLS# IR1067914 | Listing updated on 2026-10-07
46+
Beds Icon

Street View

$2,450,500

Monthly Est:$12,197

  • Beds Icon4 Beds
  • Beds Icon
    5 Baths
  • Beds Icon3,252sqft

1125 Maxwell Ave, Boulder, CO 80304

$12,197/moEst:

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  • Single Family Residence

  • Built in 1922

  • $-- HOA

  • 4,472 sqft lot

  • $754/sq.ft

Description

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.

  • Houzeo last checked: 6 minutes ago
  • Listing updated: October 7, 2026 at 5:52 pm
  • Listing Provided by: Joe Bennell (303) 210-1477 | The Colorado Group (303) 449-2131
  • Source: DENVER (RE COLORADO) MLS-CO | MLS#: IR1067914 DENVER (RE COLORADO) MLS-CO

Property Details

  • Status

    Active

  • Type

    Single Family Residence

  • No. of Stories

    -

  • County

    Boulder County

  • City

    Boulder

  • Neighborhood

    Mapleton Hill

  • Year Built

    1922

  • HOA Fees

    -

  • Finished Area

    3,252 sqft

  • Lot Size

    4,472 sqft lot

  • Basement Area

    - sqft

  • MLS Name

    DENVER (RE COLORADO) MLS

  • MLS Number

    IR1067914

  • MLS Status

    Active

  • Days on Market

    55

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Location

Facts & Features

Rooms

  • Bedrooms & bathrooms

    Bedrooms: 4

    Bathrooms: 5

  • Bathroom Full

    Level: Main

  • Bathroom Full

    Level: Basement

  • Bathroom Full

    Level: Upper

  • Bathroom Half

    Level: Upper

  • Bathroom Three Quarter

    Level: Basement

  • Kitchen

    Level: Main

    Area: Square Feet

    Dimensions: 182.00

  • Living Room

    Level: Main

    Area: Square Feet

    Dimensions: 280.00

  • Bedroom

    Level: Main

    Area: Square Feet

    Dimensions: 168.00

  • Dining Room

    Level: Main

    Area: Square Feet

    Dimensions: 320.00

  • Bedroom

    Level: Main

    Area: Square Feet

    Dimensions: 165.00

  • Bedroom

    Level: Lower

    Area: Square Feet

    Dimensions: 300.00

  • Bedroom

    Level: Basement

    Area: Square Feet

    Dimensions: 168.00

Interior

  • Interior Features

    Eat In Kitchen, Open Floorplan

  • Window Features

    Double Pane Windows, Skylight(s)

  • Cooling

    Air Conditioning Room

  • Appliances

    Dishwasher, Disposal, Dryer, Microwave, Oven, Refrigerator, Washer

  • Exterior Features

    Balcony

  • Heating

    Hot Water

  • Sewer

    Public Sewer

  • Flooring

    Wood

Construction

  • Year Built

    Year Built: 1922

  • Home type

    Single Family Residence

  • Architectural Style

    Cottage

  • Roof

    Composition

  • Construction Materials

    Block, Stucco, Frame

Utilities & Energy

  • Basement

    Full, Walk Out Access

  • Security Features

    Smoke Detector(s)

  • Water Source

    Public

  • Utilities

    Electricity Available, Natural Gas Available

Other Features

  • Lot Features

    Rolling Slope, Sprinklers In Front

  • Subdivision Name

    Mapleton Hill

  • Patio And Porch Features

    Deck, Patio

  • Vegetation

    Wooded

Price History

DateEventPrice

09/04/2026

Source: mls_logoDENVER (RE COLORADO) MLS-CO #RECIR1067914

Listed for Sale

$2,450,500 -6.66%

$754/sqft

09/03/2026

Source: mls_logoDENVER (RE COLORADO) MLS-CO #RECIR1067914

Coming Soon

$2,625,250

$807/sqft

09/03/2026

Source: mls_logoDENVER (RE COLORADO) MLS-CO #RECIR1067914

Listed for Sale

$2,625,250

$807/sqft

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