PerformAction
 logo  logo  logo
  • (303) 443-2240
  • BUY
    • Search
    • Just Listed
    • Open Houses
    • Buyers
      • Home Buying Process
      • Get Pre Approved
      • Find a Broker
    • Mortgage Calculator
  • SELL
    • Sellers
      • Home Selling Process
      • Market Analysis
      • Five Reasons a Property Sells
      • Moving Out Of The Area
      • Find The Right Broker
  • Commercial
    • Commercial Services
    • Our Listings
    • Recent Closings
    • Find The Right Broker
  • Relocation
    • Individual and Family Solutions
    • Corporate Services
    • Meet the Relocation Team
    • Global Affiliations and Awards
    • National Home Search
  • OUR COMPANY
    • Our Brokers
    • Our Story
      • Who We Are
      • Community Engagement
      • Awards
      • Managing Team
    • Testimonials
    • Join our team
    • Blog
  • COMMUNITIES
  • CONTACT US
    • BUY
      • Search
      • Just Listed
      • Open Houses
      • Buyers
        • Home Buying Process
        • Get Pre Approved
        • Find a Broker
      • Mortgage Calculator
    • SELL
      • Sellers
        • Home Selling Process
        • Market Analysis
        • Five Reasons a Property Sells
        • Moving Out Of The Area
        • Find The Right Broker
    • Commercial
      • Commercial Services
      • Our Listings
      • Recent Closings
      • Find The Right Broker
    • Relocation
      • Individual and Family Solutions
      • Corporate Services
      • Meet the Relocation Team
      • Global Affiliations and Awards
      • National Home Search
    • OUR COMPANY
      • Our Brokers
      • Our Story
        • Who We Are
        • Community Engagement
        • Awards
        • Managing Team
      • Testimonials
      • Join our team
      • Blog
    • COMMUNITIES
    • CONTACT US
Log In Or Register
 logo  logo  logo
(303) 443-2240
Log In Or Register
Clear Price
Cancel
Done Search
  • Property Video
  • Virtual Tour
  • Interactive Brochure
  • 3D Property Tour
  • Website
  • Save Listing
  • Share Listing
  • Print

$12,000,000

3621 21st St, Boulder, CO 80304  (Sold on )

  • Price Reduced$1,000,000
  • Open House
  • New Listing
  • Coming Soon
  • 4 BedBeds
  • 5 BathBaths
  • 7,099 SqftSqft
  • TypeSingle Family
  • Active
  • MLS# 1051395
0 More Schedule

Property Description

Meticulously crafted, masterfully built, and expertly curated with an elevated design, this custom home is a true masterpiece, perfectly situated on a premier lot in the exclusive Carolyn Heights neighborhood, The exquisite design and inspiring architecture of this exceptional residence ensures that every facet embodies luxury, casual elegance, and attention to detail, harmoniously blending wood, glass, stone, and steel to create an ambiance that is both inviting and inspiring. Upon entry, you'll be greeted by soaring ceilings, wide plank white oak flooring, & an open-concept main level bathed in abundant natural light streaming through expansive windows, inviting the outside in. The prodigious living area seamlessly integrates indoor & outdoor spaces, offering a glimpse of the splendid living experience that awaits. The architectural grandeur is showcased w/ a dramatic three-story open-tread wooden staircase, custom steel railings, & illuminated by bespoke lighting. The centerpiece of the home, the gourmet kitchen, boasts an impressive center island, marble & quartz countertops, artisanal tile, custom cabinetry, top-tier chef's appliances, & walk-in pantry. The elegant main floor primary bedroom suite is a tranquil retreat, w/ wall-to-wall windows, a generous walk-in closet w/custom cabinetry. The soothing primary bathroom features premium quality finishes, including designer tile, custom cabinetry, & alluring lighting.The heated pool w/ a tanning shelf, natural stone deck, & automatic pool cover takes center stage in the serene yard. Every aspect of this smart home seamlessly integrates technology, design, & automation to ensure security & convenience, and efficiency. For the discerning owner desiring a residence that embodies casual elegance & architectural interest, w/proximity to vibrant downtown Boulder & nestled in an upscale neighborhood, this property is a rare find that offers an unsurpassed lifestyle.

Thank you for requesting a showing of this property. A representative will be in touch with you shortly to confirm the requested showing date and time.
Please note that your appointment is not confirmed until someone contacts you.

Request Info/ Schedule Showing

Submit

Property Details

General

  • Subdivision: Carolyn Heights
  • County: Boulder
  • List Date: 02/11/2026
  • Expected Active Date: 02/11/2026
  • DOM: 146
  • Style: Contemporary
  • Lot SqFt: 28700
  • Approx Acres: 1
  • Beds: 4
  • Baths: 5.00
  • Full Baths: 1
  • ¾ Baths: 3
  • Half Baths: 1
  • Basement/Foundation: Full
  • Year Built: 2021
  • New construction: NO
  • Sq Ft (total): 7099
  • Garage/Parking Spaces: 3
  • Garage Description: Attached
  • MLS#: 1051395

Interior Features

  • Heating: Radiant
  • Cooling: Central Air
  • Fireplace: Gas, Living Room
  • Disability Accessibility: Level Lot, Level Drive, Exterior Door Openings 36" plus, Main Floor Bath, Main Level Bedroom, Main Level Laundry

Exterior Features

  • Construction: Frame, Brick, Block, Stone
  • Roof: Composition
  • Type: Single Family Residence
  • Outdoor Features: Sprinkler System, Hot Tub, Heated Garage, Oversized Garage
  • Fences: Fenced, Dog Run/Kennel
  • Road Access: City Street
  • Waterfront: NO

Schools

  • School District: Boulder Valley Dist RE2
  • Elementry: Crest View
  • Middle/Jr: Centennial
  • High School: Boulder

Financial Considerations

  • Tax Year: 2024
  • Tax Amount: $55752

Utilities

  • Utilities: Natural Gas Available, Electricity Available, Cable Available, High Speed Avail
  • Water/Sewer: Public Sewer
  • Water: City
 

Similar Listings

    • Open House
    • Price Reduced
    • New Listing
    • Pending
    • Coming Soon
    • Sold
    1530 Timber Ln, Boulder, CO 80304
    $10,950,000
    MLS# 1049433Active
    7,016 Sq. Ft.
     
    5 BEDS5 BATHS
    Listing courtesy of Compass - Boulder
    IRE logo
    MLS logo
    Request Info
    Delete
    Details
      • Open House
      • Price Reduced
      • New Listing
      • Pending
      • Coming Soon
      • Sold
      3633 21st St, Boulder, CO 80304
      $10,000,000
      MLS# 1051043Active
      6,988 Sq. Ft.
       
      7 BEDS5 BATHS
      Listing courtesy of The Agency - Boulder
      IRE logo
      MLS logo
      Request Info
      Delete
      Details
        • Open House
        • Price Reduced $4,100,000
        • New Listing
        • Pending
        • Coming Soon
        • Sold
        1151 Timber Ln, Boulder, CO 80304
        $9,900,000
        MLS# 1050150Active
        4,348 Sq. Ft.
         
        5 BEDS5 BATHS
        Listing courtesy of Compass - Boulder
        IRE logo
        MLS logo
        Request Info
        Delete
        Details
          • Open House
          • Price Reduced $1,500,000
          • New Listing
          • Pending
          • Coming Soon
          • Sold
          620 Juniper Ave, Boulder, CO 80304
          $9,500,000
          MLS# 1056446Active
          10,092 Sq. Ft.
           
          6 BEDS8 BATHS
          Listing courtesy of WK Real Estate
          IRE logo
          MLS logo
          Request Info
          Delete
          Details
          COL Logo IRE Logo
          • Get in Touch

          • (303) 443-2240 info@wkre.com
          • 4875 Pearl E. Circle, Suite #100 BoulderCO80301
          • 2101 Ken Pratt Blvd, Suite #100, Longmont, CO 80501

          Follow Us

          Luxury Portfolio Leading RE WKR Footer logo

          Policies

          • Privacy Policy
          • Careers
          • Accessibility Policy
          • Agent Resources
          • DMCA Notice
          • Agent Login
          Copyright © 2026 WK Real Estate. All Rights Reserved.
          • Comparison List   0

          WK Real Estate is powered by Burrow Services, Inc.