$12,000,000
Active

3621 21st Street

Boulder, CO 80304
Browse more homes in Boulder, CO
4
Beds
3
Baths
6,300
SqFt
2021
Built
Meticulously crafted, masterfully built, and expertly curated with an elevated design, this custom home is a true masterpiece, perfectly situated on a premier lot in the exclusive Carolyn Heights neighborhood, The exquisite design and inspiring architecture of this exceptional residence ensures that every facet embodies luxury, casual elegance, and attention to detail, harmoniously blending wood, glass, stone, and steel to create an ambiance that is both inviting and inspiring. Upon entry, you'll be greeted by soaring ceilings, wide plank white oak flooring, & an open-concept main level bathed in abundant natural light streaming through expansive windows, inviting the outside in. The prodigious living area seamlessly integrates indoor & outdoor spaces, offering a glimpse of the splendid living experience that awaits. The architectural grandeur is showcased w/ a dramatic three-story open-tread wooden staircase, custom steel railings, & illuminated by bespoke lighting. The centerpiece of the home, the gourmet kitchen, boasts an impressive center island, marble & quartz countertops, artisanal tile, custom cabinetry, top-tier chef's appliances, & walk-in pantry. The elegant main floor primary bedroom suite is a tranquil retreat, w/ wall-to-wall windows, a generous walk-in closet w/custom cabinetry. The soothing primary bathroom features premium quality finishes, including designer tile, custom cabinetry, & alluring lighting.The heated pool w/ a tanning shelf, natural stone deck, & automatic pool cover takes center stage in the serene yard. Every aspect of this smart home seamlessly integrates technology, design, & automation to ensure security & convenience, and efficiency. For the discerning owner desiring a residence that embodies casual elegance & architectural interest, w/proximity to vibrant downtown Boulder & nestled in an upscale neighborhood, this property is a rare find that offers an unsurpassed lifestyle.
3621 21st Street
MORTGAGE CALCULATOR
$60,679
Estimate only — not a loan offer. Consult a lender for actual terms.

LISTING SNAPSHOT

Price$12,000,000
Bedrooms4
Full Baths1
Half Baths4
Inside Area (SqFt)6,300 sqft
Lot Size0.66 Acres
Year Built2021
MLS® NumberIR1051395
StatusActive
Property Tax55752
HOA/Condo/Coop FeesN/A

GENERAL

Acres0.66
Additional Property UseResidential
Attached GarageYes
Direction FacesEast
GarageYes
Garage Spaces3
LevelsTwo
ParkingHeated Garage, Oversized, Attached
Parking Spaces3
Property Sub TypeSingle Family Residence
SecurityFire Sprinkler System, Smoke Detector(s)
SewerPublic Sewer
SqFt Above4544
SqFt Below1756
SqFt Total7099
StyleContemporary
UtilitiesCable Available, Electricity Available, Natural Gas Available
Water SourcePublic
ZoningRES

INTERIOR

AppliancesBar Fridge, Dishwasher, Disposal, Double Oven, Dryer, Freezer, Microwave, Oven, Refrigerator, Trash Compactor, Washer
BasementFull
CoolingCentral Air
Fireplace FeaturesGas, Living Room
FlooringTile, Wood
HeatingRadiant
InteriorEat-in Kitchen, Kitchen Island, Open Floorplan, Pantry, Vaulted Ceiling(s), Walk-In Closet(s), Wet Bar
Laundry FeaturesIn Unit
Main Level Bedrooms1
SpaYes
Window FeaturesDouble Pane Windows, Window Coverings
Bathroom FullLevel - Main
Bathroom HalfLevel - Main
Bathroom Three QuarterLevel - Upper
BedroomDimensions - 12 x 17, Level - Upper, Description - Carpet
Dining RoomLevel - Main, Description - Wood
Game RoomDimensions - 20 x 20, Level - Lower, Description - Wood
KitchenDimensions - 14 x 25, Level - Main, Description - Hardwood
LaundryDimensions - 11 x 9, Level - Main, Description - Tile
Living RoomDimensions - 26 x 31, Level - Main, Description - Wood
OfficeDimensions - 17 x 16, Level - Main, Description - Wood

EXTERIOR

Construction DetailsBlock, Brick, Stone, Frame
ExteriorDog Run, Gas Grill
Lot FeaturesWooded, Level, Sprinklers In Front
Patio And PorchPatio
Pool FeaturesPrivate
Private PoolYes
RoofComposition
SpaYes
Windows/DoorsDouble Pane Windows, Window Coverings

COMMUNITY

Financing Terms AvailableCash, Conventional
RoadsPaved
School DistrictBoulder Valley RE 2

SCHOOLS

School DistrictBoulder Valley RE 2
Elementary SchoolCrest View
Middle SchoolCentennial
High SchoolBoulder

RECENT ACTIVITY

June 4, 2026Active
February 27, 202612000000

Listing courtesy of Compass - Boulder (3034756097)

Listing courtesy of Compass - Boulder tricia.dessel@compass.com



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 Compass - 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.

Comps

Limited comparable sales data available in this area.

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