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REcolorado
Based on information submitted to the MLS GRID as of 2026-02-14 18:10:44 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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$10,000,000
For Sale

3633 21st Street

Boulder, CO 80304
6988 sqft | 7 beds | 4.25 baths | 0.81 acres | #IR1051043
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Listing OfficeThe Agency - Boulder
3633 21st Street
39 photos
Type:Purchase
Structure:House
Zone:Residential

Description

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.

  • Property Details
      • InteriorEat-in Kitchen, Five Piece Bath, Kitchen Island, Open Floorplan, Pantry, Vaulted Ceiling(s), Walk-In Closet(s)
      • Utility FeaturesElectricity Available, Natural Gas Available
      • Lot DescriptionLevel, Sprinklers In Front
      • Property SubtypeSingle Family Residence
      • School DistrictBoulder Valley RE 2
      • Property ConditionNew Construction
      • Subdivision21st/Linden Sub
      • BasementDaylight, Full
      • Sewer InformationPublic Sewer
      • ViewMountain(s)
      • Original List Price$10,000,000
      • Middle SchoolCentennial
      • Cost10000000.0
      • Elementary SchoolColumbine
      • MLS #IR1051043
      • MLS #IR1051043
      • Property TypePurchase
      • High SchoolBoulder
      • CountyBoulder
      • Taxes Annual$29,641
      • Square Feet6988.0
      • Parking TypeGarage
      • Utility SourcePublic
      • Structure TypeHouse
      • Bathrooms4.25
      • Acres0.81
      • Year Built2024
      • Parking Garage Spaces3.0
      • Bedrooms7
      • Full Baths3
      • Half Baths1
      • 3/4 Baths1
      • Parking Spaces3

Location

Legal

Based on information submitted to the MLS GRID as of 2026-02-06 17:11:24 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.

Last Updated: Today at 12:41 PM. Source: RECOLORADO

Provided By
Listing Agent: Marybeth Emerson (#RECIRP28512), Phone: 720-394-1997, Email: marybeth.emerson@theagencyre.com
Listing Office: The Agency - Boulder (#RECIR07534)

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