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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
57
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 : 03-09-2026 at 6:15 PM MDT
Listing Provided By : Marybeth Emerson, 7205775503, The Agency - Boulder
Source :

recolorado as distributed by MLS GRID, MLS#: RECIR1051043

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Based on information submitted to the MLS GRID as of 2026-04-04 at 9:45 a.m. MDT. 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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