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3633 21st St, Boulder, CO 80304
3633 21st St, Boulder, CO 80304 3D Tour
3633 21st St, Boulder, CO 80304 Explore 3D Tour
3633 21st St, Boulder, CO 80304
3633 21st St, Boulder, CO 80304
3633 21st St, Boulder, CO 80304
3633 21st St, Boulder, CO 80304

3633 21st St Boulder, CO 80304

$10,000,000

ACTIVE
Beds
7
Baths
5
Sqft
6,988
Acres
0.81
Year
2024
Days on Site
15
Property Type
Residential
Sub Type
Single Family
Per Square Foot
$1,431
Date Listed
Feb 6, 2026

Description of 3633 21st St, Boulder, CO 80304

Listing details for 3633 21st St, Boulder, CO 80304 : 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.
Listing Updated : 02-17-2026 at 11:31 PM EST
Home Details
3633 21st St, Boulder, CO 80304
Status
Active
MLS #ID
RECIR1051043
Price
$10,000,000
Bedrooms
7
Bathrooms
5
Square Footage
6,988
Acres
0.81
Year
2024
Days on Site
15
Property Type
Residential
Property Sub Type
Single-Family
Price per Sq Ft
$1,431
Date Listed
Feb 6, 2026
Community Information for 3633 21st St, Boulder, CO 80304
Address
3633 21st St
State
Colorado
Zip Code 80304
County Boulder
Schools
School Districts
High School District Boulder Valley RE 2
Utilities
Sewer
Public Sewer
Water Source
Public
Interior
Interior Features
Eat-in Kitchen, Five Piece Bath, Kitchen Island, Open Floorplan, Pantry, Vaulted Ceiling(s) and Walk-In Closet(s)
Appliances
Dishwasher, Disposal, Dryer, Microwave, Oven, Refrigerator and Washer
Heating
Hot Water and Radiant
Cooling
Air Conditioning-Room and Ceiling Fan(s)
Fireplace
No
Exterior
Roof
Composition
Garage Spaces
3
Foundation
HOA
Has HOA
None
Additional Information
Styles
Contemporary
Price per Sq Ft
$1,431
Listing Provided By

Marybeth Emerson, 7205775503, The Agency - Boulder

Source

recolorado, MLS#: RECIR1051043

Comments
Home Worth Check

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Location of 3633 21st St, Boulder, CO 80304

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This beautiful 7 beds 5 baths home is located at 3633 21st St, Boulder, CO 80304 and is listed for sale at $10,000,000.00. This home was built in 2024, contains 6988 square feet of living space, and sits on a 0.81 acre lot. This residential home is priced at $1,431.02 per square foot.

If you'd like to request a tour or more information on 3633 21st St, Boulder, CO 80304, please call us at 303-955-4220 so that we can assist you in your real estate search. To find homes like 3633 21st St, Boulder, CO 80304, you can search homes for sale in Boulder , or visit the neighborhood of 21st/linden Sub , or by 80304 . We are here to help when you're ready to contact us!

Schools Near 3633 21st St, Boulder, CO 80304

Home Details
3633 21st St, Boulder, CO 80304
Status
Active
MLS #ID
RECIR1051043
Price
$10,000,000
Bedrooms
7
Bathrooms
5
Square Footage
6,988
Acres
0.81
Year
2024
Days on Site
15
Property Type
Residential
Property Sub Type
Single-Family
Price per Sq Ft
$1,431
Date Listed
Feb 6, 2026
Community Information for 3633 21st St, Boulder, CO 80304
Address
3633 21st St
State
Colorado
Zip Code 80304
County Boulder
Schools
School Districts
High School District Boulder Valley RE 2
Utilities
Sewer
Public Sewer
Water Source
Public
Interior
Interior Features
Eat-in Kitchen, Five Piece Bath, Kitchen Island, Open Floorplan, Pantry and Vaulted Ceiling(s)
Appliances
Dishwasher, Disposal, Dryer, Microwave, Oven and Refrigerator
Heating
Hot Water and Radiant
Cooling
Air Conditioning-Room and Ceiling Fan(s)
Fireplace
No
Exterior
Roof
Composition
Garage Spaces
3
Foundation
HOA
Has HOA
None
Additional Information
Styles
Contemporary
Price per Sq Ft
$1,431
Listing Provided By

Marybeth Emerson, 7205775503, The Agency - Boulder

Source

recolorado, MLS#: RECIR1051043

Comments

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