Property
ActiveResidential
1/50
$12,000,000

3621 21st Street

Boulder, CO 80304
4
Beds
5
Baths
7,099
SqFt
0.66
Acres
RECOLORADO
#IR1051395
Updated: Jun 16, 2026, 3:15pm

Property Description

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.
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Included Appliances
Bar FridgeDishwasherDisposalDouble OvenDryerFreezerMicrowaveOvenRefrigeratorTrash CompactorWasher

Property Details

Interior
Above Grade Finished Area
4544
Appliances
Bar FridgeDishwasherDisposalDouble OvenDryerFreezerMicrowaveOvenRefrigeratorTrash CompactorWasher
Basement
Full
Below Grade Finished Area
1756
Below Grade Unfinished Area
799
Building Area Total
7099
Cooling
Central Air
Fireplace Features
GasLiving Room
Flooring
TileWood
H V A C Description
Central Air
Heating
Radiant
Interior Features
Eat-in KitchenFive Piece BathKitchen IslandOpen FloorplanPantryVaulted Ceiling(s)Walk-In Closet(s)Wet Bar
Laundry Features
In Unit
Living Area
6300
Room Count
15
Security Features
Fire Sprinkler SystemSmoke Detector(s)
Window Features
Double Pane WindowsWindow Coverings
Construction
Architectural Style
Contemporary
Building Area Source
Other
Construction Materials
BlockBrickStoneFrame
Direction Faces
East
Levels
Two
Roof
Composition
Structure Type
House
Year Built
2021
Site & Exterior
Exterior Features
Dog RunGas GrillSpa/Hot Tub
Garage Spaces
3
Lot Features
LevelSprinklers In Front
Lot Size Acres
0.66
Lot Size Square Feet
28700
Parking Features
Heated GarageOversized
Parking Total
3
Patio And Porch Features
Patio
Pool Features
Private
Power Production Count
Yes
Road Frontage Type
Public
Road Surface Type
Paved
Sewer
Public Sewer
Utilities
Cable AvailableElectricity AvailableInternet Access (Wired)Natural Gas Available
Vegetation
GrassedWooded
Water Source
Public
Zoning
RES
Financials
Contract Earnest Check To
Land Title - Jackie Beck
Contract Min Earnest
300000.00
Exclusions
Personal Property and Artwork
Ownership
Individual
Parcel Number
R0004965
Tax Annual Amount
55752
Tax Legal Description
LOT 5 BLK 7 CAROLYN HEIGHTS
Tax Year
2024

Neighborhood & Lifestyle

Community & Association
Subdivision Name
Carolyn Heights
Schools
Ratings
Elementary
Crest View
Middle
Centennial
High
Boulder
Elem. District
Boulder Valley RE 2
High District
Boulder Valley RE 2
Listing provided courtesy of RECOLORADO via IDX. Updated: Jun 16, 2026, 3:15pm.
Patricia Dessel

Listing Agent

Compass - Boulder

Call Agent