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3633 21st St

Boulder, CO 80304
  • $10,000,000
  • STATUS: Active
  • ON SITE: 34 Days
  • MLS #: 1051043
UPDATED: 46 min ago
$10,000,000
  • 7
    BEDS
  • 0.81
    ACRES
  • 4
    BATHS
  • 1
    1/2 BATHS
  • 6,988
    SQFT
  • $1,431
    $/SQFT
Neighborhood:
Type:
Single-Family Home
Built:
2024
County:
Area:

School Information

Elementary School:
Middle School:
High School:
School District:

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!

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© 2026 Information and Real Estate Services, LLC. IDX 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 is deemed reliable but is not guaranteed accurate by the MLS or Tandem Real Estate. Data last updated: 2026-03-13T12:44:28.02.

Information source: Information and Real Estate Services, LLC. Provided for limited non-commercial use only under IRES Rules © Copyright IRES.
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3633 21st St Boulder, CO 80304

  • Price: $10,000,000
  • Status: Active
  • On Site: 34 Days
  • Updated: 46 min ago
  • MLS #: 1051043
7
Beds
4
Baths
1
½ Baths
0.81
Acres
6,988
SQFT
$1,431
$/SQFT
2024
Built
Neighborhood:
21St/Linden Sub
County:
Boulder
Area:
Boulder
Elementary School:
Columbine
Middle School:
Centennial
High School:
Boulder
School District:
Boulder Valley Dist Re2
Property 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!
Exterior Features

Architectural Style Contemporary Construction Materials Frame Exterior Features Sprinkler SystemOversized Garage Garage Sq Ft 768 Garage Type Attached Parking Features Attached Patio And Porch Features PatioDeck Roof Composition View Hills Waterfront YN No Window Features Skylight(s)

Interior Features

Above Grade Finished Area 4798 Accessibility Features Level LotLevel DriveLow Carpet All Bedrooms Conform Yes Appliances Gas RangeDishwasherRefrigeratorWasherDryerMicrowaveDisposalFire Alarm Basement FullDaylight Bathrooms Total Integer 5 Baths Full Additional 0 Baths Full Basement 1 Baths Full Lower 0 Baths Full Main 0 Baths Full Upper 2 Baths Half Additional 0 Baths Half Basement 0 Baths Half Lower 0 Baths Half Main 1 Baths Half Upper 0 Baths Rough In 0 Baths Three Quarters Additional 0 Baths Three Quarters Basement 0 Baths Three Quarters Lower 0 Baths Three Quarters Main 0 Baths Three Quarters Upper 1 Below Grade Finished Area 2190 Cooling Wall/Window Unit(s)Ceiling Fan(s) Fireplace Features Gas Flooring Wood Has Family Room No Has Study Yes Heating Hot WaterZonedRadiant Interior Features Eat-in KitchenSeparate Dining RoomCathedral Ceiling(s)Open FloorplanPantryWood WindowsWalk-In Closet(s)SkylightsKitchen Island Levels Tri-Level Living Area Source Assessor Main Floor Sq Ft 2192 Room Type Media Room Upper Sq Ft 2606

Property Features

Are Ditches Active No Association YN No Electric XCEL Exclusions Sellers personal property and any staging items Fencing PartialSecurity Flood Plain Minimal Flood or C Rating Gas XCEL Has Improvements No Has Irrigation Ditches No Has Metro Tax District No Has Water Rights No Irrigation Water Rights YN No Is Water Meter Installed Yes Listing Terms CashConventional Lot Features WoodedEvergreen TreesDeciduous TreesLevelHouse Faces South New Construction Status NewCompleted New Construction YN Yes Possible Use Single Family Property Sub Type Single Family Residence Security Features Fire Sprinkler System Sewer Public Sewer Special Listing Conditions Private Owner Tax Annual Amount 29641 Tax Year 2025 Utilities Natural Gas AvailableElectricity Available Water Source City Zoning RES

Listing information © 2026 Information and Real Estate Services
Listing provided courtesy of Marybeth Emerson of The Agency - Boulder: 7203941997.



IRES logo

© 2026 Information and Real Estate Services, LLC. IDX 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 is deemed reliable but is not guaranteed accurate by the MLS or Tandem Real Estate. Data last updated: 2026-03-13T12:44:28.02.

Information source: Information and Real Estate Services, LLC. Provided for limited non-commercial use only under IRES Rules © Copyright IRES.
 
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