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3633 21st Street

Boulder, CO 80304
  • $10,000,000
  • STATUS: Active
  • ON SITE: 98 Days
  • ID#: IR1051043
UPDATED: 52 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:
REcolorado logo Offered by The Agency - Boulder.

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! Original home built in 1987. Home had a studs up remodel that was completed in early 2024.

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Digital Millennium Copyright Act

Based on information submitted to the MLS GRID as of 2026-05-16T13:24:33.763 UTC. 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.

REcolorado logo © 2026 METROLIST, INC., DBA RECOLORADO® – All Rights Reserved 6455 S. Yosemite St., Suite 500 Greenwood Village, CO 80111 USA

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3633 21st Street Boulder, CO 80304

  • Price: $10,000,000
  • Status: Active
  • On Site: 98 Days
  • Updated: 52 min ago
  • ID#: IR1051043
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 Re 2
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! Original home built in 1987. Home had a studs up remodel that was completed in early 2024.
Exterior Features

Architectural Style Contemporary Attached Garage YN Yes Construction Materials Frame Fencing FencedPartial Lot Features LevelSprinklers In Front Parking Features Oversized Parking Total 3 Patio And Porch Features DeckPatio Roof Composition Structure Type House Vegetation Wooded View Mountain(s)

Interior Features

Above Grade Finished Area 4798 Appliances DishwasherDisposalDryerMicrowaveOvenRefrigeratorWasher Basement DaylightFull Basement YN Yes Below Grade Finished Area 2190 Cooling Air Conditioning-RoomCeiling Fan(s) Fireplace Features Gas Flooring TileWood Heating Hot WaterRadiant Interior Features Eat-in KitchenFive Piece BathKitchen IslandOpen FloorplanPantryVaulted Ceiling(s)Walk-In Closet(s) Levels Tri-Level Main Level Bathrooms 1 Main Level Bedrooms 0 Rooms Bathroom Half (Main Level) Bathroom Full (Upper Level) Bathroom Full (Basement Level) Game Room (Lower Level) Office (Main Level) Bathroom Full (Upper Level) Laundry (Main Level) Living Room (Main Level) Bedroom (Upper Level) Kitchen (Main Level) Bedroom (Upper Level) Bedroom (Upper Level) Bedroom (Upper Level) Bedroom (Lower Level) Dining Room (Main Level) Bedroom (Upper Level) Bathroom Three Quarter (Upper Level) Rooms Total 17 Window Features Skylight(s)

Property Features

Association YN No Building Area Source Assessor Comparable Listing YN No Direction Faces South Exclusions Sellers personal property and any staging items HVACDescription Room Air ConditionerCeil Listing Terms CashConventional Living Area Sq Ft 6988 Ownership Individual Possession Closing/DOD Property Attached YN No Property Condition New Construction Property Sub Type Single Family Residence Restrictions Covenants YN No Security Features Fire Sprinkler SystemSmoke Detector(s) Sewer Public Sewer Sewer Tap YN No Tax Annual Amount 29641 Tax Legal Description LOT 1 21ST/LINDEN SUB Tax Year 2025 Utilities Electricity AvailableNatural Gas Available Water Source Public Zoning RES

REcolorado logoListing courtesy of REcolorado as distributed by MLS GRID.
Listing courtesy of The Agency - Boulder:7203941997. MLS #IR1051043


Digital Millennium Copyright Act

Based on information submitted to the MLS GRID as of 2026-05-16T13:24:33.763 UTC. 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.

REcolorado logo © 2026 METROLIST, INC., DBA RECOLORADO® – All Rights Reserved 6455 S. Yosemite St., Suite 500 Greenwood Village, CO 80111 USA

 
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REcolorado logo Offered by The Agency - Boulder.