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$11,500,000
New Listing

3633 21st Street
Boulder, CO 80304

For Sale|Single Family Residence|Active
7
Beds
3
Full Baths
2
Partial Baths
6,988
SqFt
$1,646
/SqFt
2024
Built
Subdivision:
21st/Linden Sub
County:
Boulder

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720-419-0470
3633 21st Street3633 21st Street3633 21st Street3633 21st Street
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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.

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Listing Snapshot
Price 
$11,500,000
Days On Site 
0 Days
Bedrooms 
7
Inside Area (SqFt) 
6,988 sqft
Total Baths 
5
Full Baths 
3
Partial Baths 
2
Lot Size 
0.81 Acres
Year Built 
2024
MLS® Number 
IR1031592
Status 
Active
Property Tax 
$29,936
HOA/Condo/Coop Fees 
N/A
Sq Ft Source 
Assessor
Friends & Family
Recent Activity
16 hours agoListing updated with changes from the MLS®
17 hours agoListing first seen on site
General Features
Acres 
0.81
Additional Property Use 
Residential
Attached Garage 
Yes
Direction Faces 
South
Garage 
Yes
Garage Spaces 
3
Parking 
OversizedAttached
Parking Spaces 
3
Property Condition 
New Construction
Property Sub Type 
Single Family Residence
Security 
Fire Sprinkler System
Sewer 
Public Sewer
SqFt Above 
4798
SqFt Below 
2190
SqFt Total 
6988
Style 
Contemporary
Utilities 
Electricity AvailableNatural Gas Available
Water Source 
Public
Zoning 
RES
Interior Features
Appliances 
DishwasherDryerOvenRefrigeratorWasher
Basement 
DaylightFull
Cooling 
Ceiling Fan(s)
Fireplace Features 
Gas
Flooring 
TileWood
Heating 
Hot WaterRadiant
Interior 
Eat-in KitchenKitchen IslandOpen FloorplanPantryVaulted Ceiling(s)Walk-In Closet(s)
Bathroom (1/2) 
Level - Main
Bathroom (3/4) 
Level - Upper
Bathroom (Full) 
Level - Basement
Bedroom 
Dimensions - 15 x 14Level - UpperDescription - Wood
Dining Room 
Dimensions - 15 x 14Level - MainDescription - Wood
Game Room 
Dimensions - 35 x 18Level - LowerDescription - Carpet
Kitchen 
Dimensions - 16 x 16Level - MainDescription - Wood
Laundry 
Dimensions - 14 x 10Level - MainDescription - Tile
Living Room 
Dimensions - 27 x 26Level - MainDescription - Wood
Office 
Dimensions - 19 x 14Level - MainDescription - Wood
Primary Bathroom (Full) 
Level - Upper
Primary Bedroom 
Dimensions - 26 x 16Level - UpperDescription - Carpet
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Exterior Features
Construction Details 
Frame
Fencing 
FencedPartial
Lot Features 
WoodedLevelSprinklers In Front
Patio And Porch 
DeckPatio
Roof 
Composition
View 
Mountain(s)
Waterview 
Mountain(s)
Community Features
Financing Terms Available 
CashConventional
School District 
Boulder Valley RE 2
Schools
School District
Boulder Valley RE 2
Elementary School
Columbine
Middle School
Centennial
High School
Boulder
Listing courtesy of The Agency - Boulder [email protected]



The content relating to real estate for sale in this Web site comes in part from the Internet Data eXchange ("IDX") program of METROLIST, INC., DBA RECOLORADO real estate listings held by brokers other than The Agency - Boulder are marked with the IDX Logo. This information is being provided for the consumers' personal, non-commercial use and may not be used for any other purpose. All information subject to change and should be independently verified.

Neighborhood & Commute
Source: Walkscore
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