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Single family home for sale at 661 Maxwell Ave, Boulder, CO 80304 | MLS# IR1070334 | Listing updated on 2026-10-17
Photo 1 of Single family home for sale at 661 Maxwell Ave, Boulder, CO 80304 | MLS# IR1070334 | Listing updated on 2026-10-17
Photo 2 of Single family home for sale at 661 Maxwell Ave, Boulder, CO 80304 | MLS# IR1070334 | Listing updated on 2026-10-17
Photo 3 of Single family home for sale at 661 Maxwell Ave, Boulder, CO 80304 | MLS# IR1070334 | Listing updated on 2026-10-17
Photo 4 of Single family home for sale at 661 Maxwell Ave, Boulder, CO 80304 | MLS# IR1070334 | Listing updated on 2026-10-17
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$4,975,000

Monthly Est:$24,762

  • Beds Icon5 Beds
  • Beds Icon
    6 Baths
  • Beds Icon4,687sqft

661 Maxwell Ave, Boulder, CO 80304

$24,762/moEst:

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  • Single Family Residence

  • Built in 1910

  • $-- HOA

  • 6,898 sqft lot

  • $1,061/sq.ft

Description

OPEN SATURDAY 11 AM - 2 PM! A rare find in Mapleton Hill! Beautifully remodeled down to the studs in 2020 and complemented by a brand-new $1,000,000 ADU, this unique home brings together historic charm, gorgeous modern finishes and exceptional flexibility. Filled with natural light, the home offers an inviting flow with spaces that feel both connected and comfortable. Exposed brick adds warmth and character, while hardwood floors and thoughtfully chosen finishes create a cohesive feel throughout. The custom kitchen is a standout, featuring Wolf appliances, a Sub-Zero refrigerator and a charming built-in corner table-the perfect gathering spot for morning coffee or a casual meal. The main level includes a spacious study, a bedroom, a full bath and a powder room, providing wonderful options for guests and working from home. An elegant staircase with custom treads and metal detailing leads upstairs to the primary suite, where a generous deck captures foothill views and beautiful sunsets. It's a lovely place to start the day or unwind in the evening. The walkout lower level expands the living space with a recreation room, two additional bedrooms and a three-quarter bath, offering room to spread out and host guests comfortably. Adding to this exceptional property is the brand-new ADU with high end finish, bringing another dimension to the home's versatility and appeal. Walk to the Mount Sanitas trails for a morning hike or head to Pearl Street for shopping, dining and all the energy of downtown Boulder. With its blend of timeless character, modern comfort and a coveted Mapleton Hill setting, 661 Maxwell captures the best of Boulder living and with the Sundance Film Festival coming to Boulder in 2027, this location offers even more to look forward to. The main house is 3048 sq ft. ADU 1063 with a separate entrance basement 576 sq ft (great for storage!)

  • Houzeo last checked: 9 minutes ago
  • Listing updated: October 17, 2026 at 8:07 pm
  • Listing Provided by: Karolyn Merrill (303) 817-2827 , Patrick Dolan | RE/MAX of Boulder, Inc (303) 449-7000
  • Source: DENVER (RE COLORADO) MLS-CO | MLS#: IR1070334 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

    1910

  • HOA Fees

    -

  • Finished Area

    4,687 sqft

  • Lot Size

    6,898 sqft lot

  • Basement Area

    - sqft

  • MLS Name

    DENVER (RE COLORADO) MLS

  • MLS Number

    IR1070334

  • MLS Status

    Active

  • Days on Market

    2

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Location

Facts & Features

Rooms

  • Bedrooms & bathrooms

    Bedrooms: 5

    Bathrooms: 6

  • Bathroom Three Quarter

    Level: Lower

  • Bathroom Half

    Level: Main

  • Bathroom Full

    Level: Main

  • Family Room

    Level: Lower

    Area: Square Feet

    Dimensions: 280.00

  • Office

    Level: Main

    Area: Square Feet

    Dimensions: 180.00

  • Bathroom Three Quarter

    Level: Upper

  • Kitchen

    Level: Main

    Area: Square Feet

    Dimensions: 143.00

  • Laundry

    Level: Lower

    Area: Square Feet

    Dimensions: 24.00

  • Bedroom

    Level: Upper

    Area: Square Feet

    Dimensions: 192.00

  • Bedroom

    Level: Main

    Area: Square Feet

    Dimensions: 132.00

  • Bedroom

    Level: Lower

    Area: Square Feet

    Dimensions: 152.00

  • Bedroom

    Level: Lower

    Area: Square Feet

    Dimensions: 120.00

  • Dining Room

    Level: Main

    Area: Square Feet

    Dimensions: 169.00

  • Living Room

    Level: Main

    Area: Square Feet

    Dimensions: 399.00

Interior

  • Sewer

    Public Sewer

  • Interior Features

    Eat In Kitchen, In Law Floorplan, Open Floorplan, Pantry, Walk In Closet(s)

  • Heating

    Forced Air, Radiant

  • Flooring

    Wood

  • Cooling

    Ceiling Fan(s), Central Air, Ductless

  • Appliances

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

Construction

  • Year Built

    Year Built: 1910

  • Home type

    Single Family Residence

  • Roof

    Composition

  • Construction Materials

    Brick

Utilities & Energy

  • Water Source

    Public

  • Basement

    Full, Unfinished, Walk Out Access

  • Fireplace Features

    Gas, Living Room

  • Security Features

    Smoke Detector(s)

  • Laundry Features

    In Unit

  • Utilities

    Natural Gas Available

Other Features

  • Lot Features

    Sprinklers In Front

  • Patio And Porch Features

    Deck, Patio

  • Subdivision Name

    Mapleton Hill

Price History

DateEventPrice

10/15/2026

Source: mls_logoDENVER (RE COLORADO) MLS-CO #RECIR1070334

Listed for Sale

$4,975,000

$1,210/sqft

10/09/2026

Source: mls_logoDENVER (RE COLORADO) MLS-CO #RECIR1070334

Coming Soon

$4,975,000

$1,210/sqft

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