3633 21st Street

Boulder, CO 80304 — Boulder County — 21st/linden Sub Neighborhood

Residential  $11,500,000  Active  Listing# IR1031592  

7 beds    5 baths    6988.00 sqft    Lot size: 35311.00 sqft    0.81 acres    2024 build   

 



  Showing Request        
Updated: 11-08-2025 08:50pm

  Property 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 moments 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 Details

Property Type 
Residential
Listing# 
IR1031592
Source 
REcolorado (Denver)
Last Updated 
11-08-2025 08:50pm
Status 
Active
Off Market Date 
11-30--0001 12:00am

  Property Details

Property Subtype 
Single Family Residence
Sold Price 
$11,500,000
Original Price 
$11,500,000
Location 
Boulder, CO 80304
SqFT 
6988.00
Year Built 
2024
Acres 
0.81
Bedrooms 
7
Bathrooms 
5
Levels 
Tri-Level

  Map

  Property Level and Sizes

SqFt Lot 
35311.00
Lot Features 
Eat-in Kitchen, Five Piece Bath, Kitchen Island, Open Floorplan, Pantry, Vaulted Ceiling(s), Walk-In Closet(s)
Lot Size 
0.81
Basement 
Daylight, Full

  Financial Details

Previous Year Tax 
29936.00
Year Tax 
2024
Primary HOA Fees 
0.00

  Interior Details

Interior Features  
Eat-in Kitchen, Five Piece Bath, Kitchen Island, Open Floorplan, Pantry, Vaulted Ceiling(s), Walk-In Closet(s)
Appliances  
Dishwasher, Dryer, Oven, Refrigerator, Washer
Electric  
Air Conditioning-Room, Ceiling Fan(s)
Flooring  
Tile, Wood
Cooling  
Air Conditioning-Room, Ceiling Fan(s)
Heating  
Hot Water, Radiant
Fireplaces Features  
Gas
Utilities  
Electricity Available, Natural Gas Available

  Exterior Details

Lot View  
Mountain(s)
Water  
Public
Sewer  
Public Sewer

  Garage & Parking

Parking Features  
Oversized

  Exterior Construction

Roof  
Composition
Construction Materials  
Frame
Security Features  
Fire Sprinkler System
Builder Source 
Assessor

  Land Details

PPA 
0.00
Sewer Fee 
0.00

  Schools

Elementary School 
Columbine
Middle School 
Centennial
High School 
Boulder

  Walk Score®


 

  Listing Media

Virtual Tour 
  Click here to watch tour


  Contact Agent

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