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.
Interior Features: Eat-in Kitchen, Five Piece Bath, Kitchen Island, Open Floorplan, Pantry, Vaulted Ceiling(s), Walk-In Closet(s)
Measurements
Living Area: 6,988
Rooms
Basement: Daylight, Full
Has Basement: Yes
Bathrooms Full: 3
Bathrooms Half: 1
Bathrooms Three Quarter: 1
Bathrooms Total Integer: 5
Bedrooms Total: 7
Main Level Bathrooms: 1
Other
General
Exclusions: Sellers personal property and any staging items
Location
Subdivision Name: 21st/Linden Sub
Parking
Parking
Attached Garage: Yes
Garage Spaces: 3
Parking Features: Oversized
Parking Total: 3
Schools
Elementary School
Elementary School: Columbine
Elementary School District: Boulder Valley RE 2
High School
High School: Boulder
High School District: Boulder Valley RE 2
Middle or Junior School
Middle Or Junior School: Centennial
Utilities
Equipment
Cooling: Air Conditioning-Room, Ceiling Fan(s)
Heating: Hot Water, Radiant
Sewer: Public Sewer
Utilities: Electricity Available, Natural Gas Available
Water Source: Public
Frequently Asked Questions
How many bedrooms and bathrooms does this single-family home have?
There are 7 bedrooms and 5 bathrooms in this single-family home at 3633 21st Street.
What schools are nearby to 3633 21st Street?
Nearby schools include the Columbine Elementary School, Centennial Middle School, and Boulder High School.
Does this single-family home have parking?
Yes, there are 3 parking spaces available for 3633 21st Street.
What are the annual taxes for 3633 21st Street?
Annual taxes for this single-family home are estimated at $29,641.
How does 3633 21st Street compare to other single-family homes in Carolyn Heights?
This single-family home is listed 103% above the average price for single-family homes in Carolyn Heights and has been on the market for 36 less days than the typical home in this area.
What is the square footage on this single-family home?
According to the MLS, this listing is 6,988 sqft.
3633 21st Street is a 7-bedroom, 5-bath single-family home for sale in Boulder CO 80304. Available on Prevu for 39 days at $10,000,000. This home features 6,988 square feet of living space, located in Carolyn Heights. The median listing price for single-family homes in this area is $3,350,000. Nearby schools include Columbine Elementary School, Centennial Middle School, and Boulder High School. Additional amenities include private outdoor space, dishwasher, parking, and washer/dryer. View other single-family home listings in Boulder.
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