3633 21st St Boulder, CO 80304
Listing Courtesy of: MLS LogoIRES LLC / The Agency Boulder / Marybeth Emerson - Contact:  7203941997

  3633 21st St Boulder, CO 80304

Active (48 Days)
$10,000,000 (USD)
7
BED
5
BATH
6,988
SQFT

Description

Exquisite secluded sanctuary in the heart of Carolyn Heights. Tucked into one of Boulder's most prestigious enclaves, this estate offers a rare fusion of luxury, privacy, and relaxed sophistication. Set on a serene, tree-lined .81-acre level lot, this 7-bedroom, 5-bathroom oasis is where inspired design meets effortless living. Stunning views of the Flatirons awaken you each morning from your bed. Those same views tease your senses from the expansive patios with fully retractable doors that blur the lines from inside to outside. Bathed in natural light from soaring windows and skylights, every detail has been thoughtfully curated. Custom walnut doors and paneling welcome you into the home and invite you to explore. The chef's kitchen is a showstopper-featuring custom cabinetry, an oversized marble island, and top-of-the-line Thermador appliances. The open-concept layout flows seamlessly into a lush backyard oasis, perfect for gatherings or quiet moments of retreat by the fire pit. The primary suite is a haven unto itself with vaulted ceilings, a spa-inspired bath, spacious walk-in closet, and private deck access. With multiple flexible living spaces-including a dedicated home office and media room, this home is ready to adapt to your every need. Located minutes from North Boulder's best hiking trails, cycling routes, farmers markets, and local eateries-yet nestled in the peaceful privacy of a mature, sought-after neighborhood. Elevated living starts here. LIVE BOULDER, LOVE BOULDER!

MLS #:
1051043
Taxes
$29,641(2025)
Lot Size
0.81 acres
Type
Single-Family Home
Year Built
2024
Style
Contemporary
Views
Hills
School District
Boulder Valley Dist Re2
County
Boulder County

Listed By

Marybeth Emerson, The Agency Boulder, Contact: 7203941997
Source
IRES LLC
Last checked Mar 26 2026 at 3:10 AM GMT+0000
Bathroom Details
  • Full Bathrooms: 3
  • 3/4 Bathroom: 1
  • Half Bathroom: 1
Interior Features
  • Eat-In Kitchen
  • Kitchen Island
  • Separate Dining Room
  • Pantry
  • Skylights
  • Wood Windows
  • Open Floorplan
  • Walk-In Closet(s)
  • Cathedral Ceiling(s)
Kitchen
  • Disposal
  • Microwave
  • Refrigerator
  • Dishwasher
  • Fire Alarm
  • Dryer
  • Washer
  • Gas Range
Subdivision
  • 21St/Linden Sub
Lot Information
  • Evergreen Trees
  • Deciduous Trees
  • House Faces South
  • Level
  • Wooded
Property Features
  • Fireplace: Gas
Heating and Cooling
  • Hot Water
  • Zoned
  • Radiant
  • Ceiling Fan(s)
  • Wall/Window Unit(s)
Basement Information
  • Full
  • Daylight
Flooring
  • Wood
Exterior Features
  • Roof: Composition
Utility Information
  • Utilities: Natural Gas Available, Electricity Available
  • Sewer: Public Sewer
School Information
  • Elementary School: Columbine
  • Middle School: Centennial
  • High School: Boulder
Garage
  • Attached
Parking
  • Attached
Stories
  • Tri-Level
Living Area
  • 6,988 sqft
Additional Information: The Agency Boulder | 7203941997
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Estimated Monthly Mortgage Payment

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Disclaimer: Updated: 3/25/26 20:10 Information source: Information and Real Estate Services, LLC. Provided for limited non-commercial use only under IRES Rules © Copyright IRES. Terms of Use: Listing information is provided exclusively for consumers personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information deemed reliable but not guaranteed by the MLS.
Based on information submitted to the MLS GRID as of 3/26/2026 03:10. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.