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Sold on 02/11/2021
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3639 21st St, Boulder, CO 80304

  • $6,476,268

    Last sold 02/11/2021 for $4.2M

  • 6

    bed

  • 6

    bath

  • 7,581

    Sqft ($554/Sqft)

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About 3639 21st St

Property type House
Neighborhood
Year built 2007
HOA fee $0/month
Lot size 0.68 Acre
Movoto estimate
Parking 5 garage spaces
Property description
This 6-bedroom, 6-bathroom single-family home is located at 3639 21st St, Boulder, CO, 80304, in the Carolyn Heights neighborhood in Boulder County and was built in 2007. This home offers 7,581 square feet of living space on a 29,621 sq ft (0.68-acre) lot. It is served by municipal sewer. Parking includes a 5-car garage. It last sold for $4,200,000 on 2021-02-11.
Overview
Cooling/AC Central Air
Heating Forced Air
Levels/Style Two, Contemporary
Virtual Tour N/A
MLS # 4273943
Type Residential
Status Sold
SubType Single Family Residence
Living Area 7581
Lot Size (Acres) 0.68
Annual Tax 24099
Interior
# Three-Quarter Baths 2
Total # of Bathrooms 6
# Full Baths 3
# Half Baths 1
Total # of Bedrooms 6
Basement Full, Partially Finished
Fireplace Desc Gas, Gas Log, Living Room, Family Room, Bedroom
Interior Features Eat-in Kitchen, Cathedral Ceiling(s), Open Floorplan, Pantry, Walk-In Closet(s), Wet Bar, Jack & Jill Bathroom, Kitchen Island, Central Vacuum
Exterior
Roof Tile
Construction Frame, Stone
Exterior Features Sprinkler System, Balcony
Patio & Porch Patio, Deck
Lot Features House Faces East, Paved
Fencing Fenced
Amenities / Utilities
Green Features: Energy Efficiency Windows
Utilities Natural Gas Available, Electricity Available, Cable Available
Sewer/ Septic Public Sewer
Appliances Double Oven, Dishwasher, Refrigerator, Microwave, Disposal, Fire Alarm
Location
View Mountain(s)
County Boulder
Subdivision Carolyn Heights
Middle School Centennial
High School District Boulder Valley Dist RE2
Directions West On Ires Ave. Right On 19th. Right On Kalmia. Left On 21st
$6.47M
Range: $5.82M-$7.12M
Last 30 days 
  • Feb 2026
  • Feb 12, 2026 Delisted
    $4,200,000
  • Feb 8, 2021 Sold
    $4,200,000
  • Feb 8, 2021 Sold
    $4,200,000 (-4.5%)
  • Jan 15, 2021 Active
    —
  • Oct 8, 2020 Listed
    $4,400,000
  • Oct 8, 2020 Listed
    $4,400,000
  • Feb 2021
  • Feb 11, 2021 Sold
    $4,200,000
  • Oct 2, 2020 Listed
    $4,400,000 (-2.2%)
  • Feb 2021
  • Feb 11, 2021 Sold
    $4,200,000
  • Jan 12, 2021 Active
    —
  • Aug 2019
  • Aug 6, 2019 Listed
    $4,500,000
  • Jul 2019
  • Jul 18, 2019 Listed
    $4,500,000 (+32.4%)
  • Oct 2013
  • Oct 4, 2013 Sold
    $3,400,000 (-2.7%)
  • Aug 23, 2013 Listed
    $3,495,000 (+25.7%)
  • Jun 2009
  • Jun 26, 2009 Sold
    $2,780,000 (+251.9%)
  • Aug 2006
    Public Records
  • Aug 16, 2006 Sold
    $790,000
  • 3639 21st St
    $4.2M
  • Carolyn Heights
    $11M +214% y/y
  • 80304
    $1.55M -22% y/y
  • Boulder
    $1.04M -30% y/y
No chart available
Statistics calculated by Movoto

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3/10
Columbine Elementary School
public Grades PK, K-5
Boulder Valley Re 2 School District
5/10
Centennial Middle School
public Grades 6-8
Boulder Valley Re 2 School District
8/10
Boulder High School
public Grades 9-12
Boulder Valley Re 2 School District
Source: GreatSchools.org © 2026. All rights reserved.

Around Carolyn Heights

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