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661 Maxwell Ave, Boulder, CO 80304

$4,975,000
  • 5

    bed

  • 6

    bath

  • 4,111

    Sqft ($1,210/Sqft)

House for sale 6 days

About 661 Maxwell Ave

Property type House
Neighborhood
Year built 1910
HOA fee $0/month
Lot size 6,970 Sqft
Property 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!)
Listed by
Listing Agent - Karolyn Merrill
Listing Agent Contact: 3034415642
Listing Office - RE/MAX of Boulder, Inc
Source: IRESMLS mls logo
MLS#1070334 • last updated 15 hours ago
Movoto checked IRESMLS for data 26 minutes ago
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Overview
Cooling/AC Central Air, Ceiling Fan(s), Ductless
Heating Forced Air, Radiant
Levels/Style Two, In-Law Area, Includes Rental Unit, Legal Conforming
Virtual Tour External Link
MLS # 1070334
Type Residential
Status Active
SubType Mixed Use
Living Area 4111
Lot Size (Acres) 0.16
Annual Tax 15843
Interior
# Three-Quarter Baths 3
Total # of Bathrooms 6
# Full Baths 2
# Half Baths 1
Total # of Bedrooms 5
Basement Full, Unfinished, Partially Finished, Walk-Out Access
Flooring Wood
Fireplace Desc Gas, Living Room
Interior Features Eat-in Kitchen, Separate Dining Room, Open Floorplan, Pantry, Wood Windows, Walk-In Closet(s), Washer/Dryer Hookup
Exterior
Roof Composition
Construction Brick
Exterior Features Sprinkler System
Patio & Porch Patio, Deck
Fencing Partial
Amenities / Utilities
Utilities Natural Gas Available
Sewer/ Septic Public Sewer
Water Source Public
Appliances Gas Range, Self Cleaning Oven, Dishwasher, Refrigerator, Washer, Dryer, Microwave, Disposal, Fire Alarm
Location
View Hills
County Boulder
Subdivision Mapleton Hill
Middle School Casey
High School District Boulder Valley Dist RE2
APN R0008550
Lot/ Land Details
Possible Use Single Family, Multi-Family
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Source: GreatSchools.org © 2026. All rights reserved.

Around Mapleton Hill

Explore everything this neighborhood has to offer. Learn more about Mapleton Hill.
81/100
Walk
64/100
Family
64/100
Dining
87/100
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  • Real Estate
  • CO
  • Boulder County
  • Boulder
  • 80304
  • Mapleton Hill
  • 661 Maxwell Ave

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