3,252 sq ft mixed use in Mapleton Hill

Active$2,625,250

MLS® Listing#1067914 · Mixed Use · Listed Sep 2, 2026

1125 Maxwell Ave, Boulder, CO 80304

Mapleton Hill · Boulder County

Showing 5 of 50 photos

4Beds

3.5Baths

3,252Sq Ft

1922Year built

0.1Acre lot

3Garage

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.

Full description online — scan the code for the complete listing.

Property information

Property type: Residential
Sub-type: Mixed Use
Year built: 1922
Living area: 3,252 Sq Ft
Lot size: 0.1 acres
Garage spaces: 3
Annual taxes (2025): $14,768
HOA fee: None
Price / Sq Ft: $807
Days on market: 29

Features

Interior: Eat-in Kitchen · Open Floorplan
Appliances: Electric Range · Gas Range · Dishwasher · Refrigerator
Cooling: Wall/Window Unit(s)
Heating: Hot Water
Flooring: Wood
Parking: Garage Door Opener · Detached
Patio: Patio · Deck
Fencing: Fenced
Lot: Sloped
Roof: Composition

$2,625,250List price

4Beds

3.5Baths

3,252Sq Ft

1922Year built

0.10Acre lot

3Garage

4 weeks agoOn market

$2,625,250

1125 Maxwell Ave

Boulder, CO 80304

Active

Your local EXIT Realty office

EXIT Mosaic RealtyCentennial, COCall

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Description

Property Information

Property type: Residential
Sub-type: Mixed Use
Style: Cottage / Includes Rental Unit / Legal Conforming
Year built: 1922
Living area: 3,252 Sq Ft
Lot size: 0.10 acres
Garage spaces: 3
Zoning: RMX-1
Days on market: 29
MLS^® Listing#: 1067914

Property Features

Interior: Eat-in Kitchen · Open Floorplan
Exterior: Balcony
Appliances: Electric Range · Gas Range · Dishwasher · Refrigerator · Washer · Dryer · Microwave · Disposal
Cooling: Wall/Window Unit(s)
Heating: Hot Water
Flooring: Wood
Basement: Full · Partially Finished · Walk-Out Access
Parking: Garage Door Opener · Detached
Patio: Patio · Deck
Fencing: Fenced
Lot features: Sloped
Construction: Frame · Block · Stucco
Roof: Composition
Windows: Skylight(s)
Security: Fire Alarm
Other structures: Storage
Utilities: Natural Gas Available · Electricity Available
Sewer: Public Sewer
Water source: Public

Rooms

Main

Primary Bedroom15x11
Bedroom 214x12
Dining Room20x16
Kitchen14x13
Living Room20x14

Additional

Study21x13

Lower

Bedroom 320x15

Basement

Bedroom 414x12

Schools

Elementary: Whittier
Middle: Casey
High: Boulder

Financial Details

HOA: None
Annual taxes: $14,768Tax year 2025
Parcel number: R0006468

Directions

Broadway and Maxwell (West side of Broadway)

Boulder Market Statistics

How this home compares to 1,623 active listings in Boulder, CO

	Boulder median	This listing
Median listing price	$1,050,000	$2,625,250
Median days on market	62	29
Median Sq Ft	1,992	3,252
Median price / Sq Ft	$540	$807

Market statistics compiled from active EXIT Realty® and MLS listings in Boulder, CO.

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2445 Bluff Street, Boulder, CO	$2,595,000	4	2.5	2,699
3315 Broadway Street, Boulder, CO	$2,541,250	4	2	2,966
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Connect with a Local Real Estate Expert

Stephan Poullier
Associate Broker
EXIT Mosaic Realty
Tasha Beckman
Broker of Record
EXIT Mosaic Realty
Nicole Robilotto
Associate Broker
EXIT Mosaic Realty
Amanda Edmondson
Associate Broker
EXIT Mosaic Realty
Marina-Jeanne Lewallen
Associate Broker
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Associate Broker
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Description

Property Information

Property Features

Rooms

Main

Additional

Lower

Basement

Schools

Financial Details

Directions

Boulder Market Statistics

Commute Calculator

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Connect with a Local Real Estate Expert

Stephan Poullier

Tasha Beckman

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Marina-Jeanne Lewallen

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Boulder Market Statistics

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