3633 21st Street, Boulder, CO 80304

Boulder
Local realty services provided by:RONIN Real Estate Professionals ERA Powered
3633 21st Street,Boulder, CO 80304
$10,000,000
  • 7 Beds
  • 5 Baths
  • 6,988 sq. ft.
  • Single family
  • Active
Listed by: marybeth emerson
Office: the agency - boulder
MLS#:IR1051043
Source:ML

Price summary

  • Price:$10,000,000
  • Price per sq. ft.:$1,431.02

About this home

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...

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Home facts

  • Year built:2024
  • Listing ID #:IR1051043

Rooms and interior

  • Bedrooms:7
  • Total bathrooms:5
  • Full bathrooms:3
  • Half bathrooms:1
  • Flooring:Tile, Wood
  • Bathrooms Description:Five Piece Bath
  • Kitchen Description:Dishwasher, Disposal, Eat-in Kitchen, Kitchen Island, Microwave, Oven, Pantry, Refrigerator
  • Basement:Yes
  • Basement Description:Daylight, Full
  • Living area:6,988 sq. ft.

Heating and cooling

  • Cooling:Air Conditioning-Room, Ceiling Fan(s)
  • Heating:Hot Water, Radiant

Structure and exterior

  • Roof:Composition
  • Year built:2024
  • Building area:6,988 sq. ft.
  • Lot area:0.81 Acres
  • Lot Features:Level, Sprinklers In Front
  • Architectural Style:Contemporary
  • Construction Materials:Frame
  • Exterior Features:Deck, Patio
  • Levels:Tri-Level

Schools

  • High school:Boulder
  • Middle school:Centennial
  • Elementary school:Columbine

Utilities

  • Water:Public
  • Sewer:Public Sewer

Finances and disclosures

  • Price:$10,000,000
  • Price per sq. ft.:$1,431.02
  • Tax amount:$29,641 (2025)

Features and amenities

  • Laundry features:Dryer, Washer
  • Amenities:Fire Sprinkler System, Skylight(s), Smoke Detector(s)

Parking

  • Total parking spaces:3
  • Parking description:Oversized
  • Garage:Yes
  • Garage spaces:3
MLS LogoBased on information submitted to the MLS GRID as of May 14, 2026 02:24 PM. 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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