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(720) 507-7655 cbelin.corealestate@gmail.com
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Based on information submitted to the MLS GRID as of 2026-09-13 01:22:29 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.
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Home / Boulder / 3621 21st Street
3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 3621 21st Street Boulder, CO 80304 View All Photos

$12,000,000

| Active

3621 21st Street

Boulder, CO 80304

6,300
Square Feet
4
Beds
3.75
Baths
0.66
Acres
214
Days on Market
IR1051395
MLS#
House
Structure
Residential
Zone
Contact
Listing OfficeCompass - Boulder

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.

Property Details
Interior
Eat-in Kitchen, Five Piece Bath, Kitchen Island, Open Floorplan, Pantry, Vaulted Ceiling(s), Walk-In Closet(s), Wet Bar
Cooling
Central Air
Heating
Radiant
Cooling Features
Central Air
Bedrooms
4
Bathrooms
3.75
Full Baths
1
Half Baths
1
3/4 Baths
3
Lot Features
Level, Sprinklers In Front
Stories
2
Lot Description
Level, Sprinklers In Front
Pool
1
Pool Description
Private
Pool Features
Private
Exterior Features
Dog Run, Gas Grill, Spa/Hot Tub
Exterior Materials
Dog Run, Gas Grill, Spa/Hot Tub
Acres
0.66
Square Feet
6300
Parking Features
Heated Garage, Oversized
Parking Spaces
3
Parking Type
Garage
Parking Garage Spaces
3
Property Type
Purchase
Style
Contemporary
Basement
1
Basement Description
Full
Year Built
2021
Roof
Composition
Sewer Information
Public Sewer
Utility Source
Public
Utility Features
Cable Available, Electricity Available, Internet Access (Wired), Natural Gas Available
Appliances
Bar Fridge, Dishwasher, Disposal, Double Oven, Dryer, Freezer, Microwave, Oven, Refrigerator, Trash Compactor, Washer
Subdivision
Carolyn Heights
School District
Boulder Valley RE 2
Elementary School
Crest View
Middle School
Centennial
High School
Boulder
County
BOULDER
Region
Boulder
Zoning
RES
Taxes Annual
$55,752
MLS #
IR1051395
Location
Legal

Based on information submitted to the MLS GRID as of 2026-08-17T16:25:34Z 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.

Provided By
Listed by Patricia Dessel (#43bad7ef0c36de1178b66daa3e4f5ca8)
Listing Office: Compass - Boulder

Legal Notice

This publication is designed to provide information with regard to the subject matter covered. It is displayed with the understanding that the publisher and authors are not engaged in rendering real estate, legal, accounting, tax, or other professional services and that the publisher and authors are not offering such advice in this publication. If real estate, legal, or other expert assistance is required, the services of a competent, professional person should be sought.

The information contained in this publication is subject to change without notice. METROLIST, INC., DBA RECOLORADO MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. METROLIST, INC., DBA RECOLORADO SHALL NOT BE LIABLE FOR ERRORS CONTAINED HEREIN OR FOR ANY DAMAGES IN CONNECTION WITH THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL.

Buyer Agency Compensation

The listing broker’s offer of compensation is made only to participants of the MLS where the listing is filed.

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