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$4,200,000
3639 21st St, Boulder, CO, 80304
6
Beds
6
Baths
7,581
Square Feet
This secluded and sophisticated sanctuary is tucked away on a lush three-quarter acre lot in the heart of Boulder. Contemporary design integrates soaring ceilings, open floor plan & exquisite finishes. Natural light floods the home through floor-to-ceiling windows. The well-appointed chef's kitchen provides a wonderful gathering place w/ effortless indoor/outdoor flow. Mature landscaping on large lot provides ultimate privacy throughout the home and on 5 covered outdoor spaces. Exquisite master suite with cozy gas fireplace, adjoining deck & hot tub, spa-like master bath w/ steam shower and huge walk in closet. Six bedrooms with ensuite baths and FIVE car attached garage!!
Offered By
Patricia Dessel, Compass - Boulder
Property Details
Property Type
Residential
Status
Closed
Bedrooms
6
Bathrooms (Full)
3
Property Sub Type
Single Family Residence
Square Feet
7,581
MLS #
925631
Bathrooms (¾)
2
Bathrooms (Half)
1
Flooring
Wood
Appliances
Gas Range, Double Oven, Dishwasher, Refrigerator, Bar Fridge, Microwave, Gas Bar-B-Q, Disposal, Fire Alarm
FIREPLACE FEATURES
Two or More, Gas, Multi-Sided, Living Room, Family Room, Bedroom
Utility Features
Natural Gas Available, Electricity Available, Cable Available, High Speed Avail, Underground Utilities
SEWER
Public Sewer
WATER SOURCE
City
Year Built
2007
Builder Name
Summit Homes
Basement
Partially Finished, Daylight
FINISHED BASEMENT SIZE
0.0
ARCHITECTURAL STYLE
Contemporary/Modern
Roof
Tile
EXTERIOR FEATURES
Sprinkler System, Balcony, Hot Tub, Oversized Garage, Tandem Garage
Parking Features
Garage Door Opener
Fence
Fenced
Lot Features
Wooded, Evergreen Trees, Deciduous Trees, Level, House Faces East, City Limits, Paved
Garage spaces
5
View
Mountain(s), Hills
CITY
Boulder
SUBDIVISION
Carolyn Heights
COUNTY
Boulder
AREA
Boulder
STATE
CO
TAX AMOUNT
24526.0
LATEST UPDATE
2026-01-22T22:49:59.112Z
PRICE CHANGE(S)
$4,400,000 Oct 21, 2025
Property Details
Property Type
Residential
Status
Closed
Bedrooms
6
Bathrooms (Full)
3
Property Sub Type
Single Family Residence
Square Feet
7,581
MLS #
925631
Bathrooms (¾)
2
Bathrooms (Half)
1
New Properties On Market
66
35%
Increase In New Listings
Average Asking Price
$1,990,611
$1,006,418 Decrease In Avg Asking Price
Average Asking Price / Sq. Ft.
$763
$81 Decrease In List Price/Sq. Ft.
Average Days On Market
13
21 Day
Decrease In Days On Market
Data as of Apr 10, 2026.
Remaining statistics above are calculated on activity within the period from Feb 01, 2026 to Mar 31, 2026.
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Down Payment
HOA Dues
Interest Rate
Estimated Property Taxes
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