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7 Beds
5 Baths
6,988 sqft

$8,950,000

3633 21st St, Boulder CO, 80304

Price per sqft$1,280.77
Built in2024
Property size6,988 sqft
Property typeResidential
Courtesy of The Agency - Boulder, Marybeth Emerson Listing Contact: 7203941997

Overview

Active

Listed Oct 16, 2026

Updated 33h ago

Exquisite secluded sanctuary in the heart of Carolyn Heights. Tucked into one of Boulder's most prestigious enclaves, this gated 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. Awaken each morning as you do in your favorite boutique hotel; surrounded by nature and peace. 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!

$59,545/mo

Est. mortgage payment based on a $8,950,000 home price.

All estimates are provided by Luxury Presence for informational purposes only. Actual amounts may vary.

Additional information

MLS® ID
1070740

Interior Features

Bedrooms
7
Bathrooms
5
Fireplace
Yes
Cooling
Yes
Heating
Yes
Basement
Yes

Exterior Features

Lot Size
0.81 Acres

Other Property Details

Taxes
$29,641
Tax Frequency
Annually
Garage
Yes
View
Yes
New Construction
Yes

Also listed on REColorado

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Based on information submitted to the MLS GRID as of 5:02 AM UTC on 10/17/2026. 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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