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3621 21st Street

Boulder, CO 80304
  • $12,000,000
  • STATUS: Active
  • ON SITE: 90 Days
  • ID#: IR1051395
UPDATED: 216 min ago
$12,000,000
  • 4
    BEDS
  • 0.66
    ACRES
  • 4
    BATHS
  • 1
    1/2 BATHS
  • 7,099
    SQFT
  • $1,690
    $/SQFT
Neighborhood:
Type:
Single-Family Home
Built:
2021
County:
Area:

School Information

Elementary School:
Middle School:
High School:
School District:
REcolorado logo Offered by Compass - Boulder.

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.

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Digital Millennium Copyright Act

Based on information submitted to the MLS GRID as of 2026-05-14T00:23:17.15 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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3621 21st Street Boulder, CO 80304

  • Price: $12,000,000
  • Status: Active
  • On Site: 90 Days
  • Updated: 216 min ago
  • ID#: IR1051395
4
Beds
4
Baths
1
½ Baths
0.66
Acres
7,099
SQFT
$1,690
$/SQFT
2021
Built
Neighborhood:
Carolyn Heights
County:
Boulder
Area:
Boulder
Elementary School:
Crest View
Middle School:
Centennial
High School:
Boulder
School District:
Boulder Valley Re 2
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.
Exterior Features

Architectural Style Contemporary Attached Garage YN Yes Construction Materials BlockBrickStoneFrame Exterior Features Dog RunGas GrillSpa/Hot Tub Lot Features LevelSprinklers In Front Parking Features Heated GarageOversized Parking Total 3 Patio And Porch Features Patio Pool Features Private Road Frontage Type Public Road Surface Type Paved Roof Composition Structure Type House Vegetation GrassedWooded

Interior Features

Above Grade Finished Area 4544 Appliances Bar FridgeDishwasherDisposalDouble OvenDryerFreezerMicrowaveOvenRefrigeratorTrash CompactorWasher Basement Full Basement YN Yes Below Grade Finished Area 1756 Cooling Central Air Fireplace Features GasLiving Room Flooring TileWood Heating Radiant Interior Features Eat-in KitchenFive Piece BathKitchen IslandOpen FloorplanPantryVaulted Ceiling(s)Walk-In Closet(s)Wet Bar Laundry Features In Unit Levels Two Main Level Bathrooms 2 Main Level Bedrooms 1 Rooms Kitchen (Main Level) Game Room (Lower Level) Dining Room (Main Level) Laundry (Main Level) Bathroom Full (Main Level) Bathroom Three Quarter (Upper Level) Bathroom Three Quarter (Lower Level) Bedroom (Upper Level) Living Room (Main Level) Bathroom Half (Main Level) Bedroom (Main Level) Bedroom (Lower Level) Bathroom Three Quarter (Upper Level) Bedroom (Upper Level) Office (Main Level) Rooms Total 15 Window Features Double Pane WindowsWindow Coverings

Property Features

Association YN No Building Area Source Other Comparable Listing YN No Direction Faces East Exclusions Personal Property and Artwork HVACDescription Central Air Conditioning Listing Terms CashConventional Living Area Sq Ft 6300 Ownership Individual Possession Closing/DOD Property Attached YN No 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 55752 Tax Legal Description LOT 5 BLK 7 CAROLYN HEIGHTS Tax Year 2024 Utilities Cable AvailableElectricity AvailableInternet Access (Wired)Natural Gas Available Water Source Public Zoning RES

REcolorado logoListing courtesy of REcolorado as distributed by MLS GRID.
Listing courtesy of Compass - Boulder:3034756097. MLS #IR1051395


Digital Millennium Copyright Act

Based on information submitted to the MLS GRID as of 2026-05-14T00:23:17.15 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 Compass - Boulder.