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Single family home for sale at 3621 21st Street, Boulder, CO 80304 | MLS# IR1051395 | Listing updated on 2026-09-17
Photo 1 of Single family home for sale at 3621 21st Street, Boulder, CO 80304 | MLS# IR1051395 | Listing updated on 2026-09-17
Photo 2 of Single family home for sale at 3621 21st Street, Boulder, CO 80304 | MLS# IR1051395 | Listing updated on 2026-09-17
Photo 3 of Single family home for sale at 3621 21st Street, Boulder, CO 80304 | MLS# IR1051395 | Listing updated on 2026-09-17
Photo 4 of Single family home for sale at 3621 21st Street, Boulder, CO 80304 | MLS# IR1051395 | Listing updated on 2026-09-17
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$12,000,000

Monthly Est:$59,728

  • Beds Icon4 Beds
  • Beds Icon
    5 Baths
  • Beds Icon7,099sqft

3621 21st Street, Boulder, CO 80304

$59,728/moEst:

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  • Single Family Residence

  • Built in 2021

  • $-- HOA

  • 28,700 sqft lot

  • $1,690/sq.ft

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.

  • Houzeo last checked: 0 minutes ago
  • Listing updated: September 17, 2026 at 4:08 pm
  • Listing Provided by: Patricia Dessel (303) 475-6097 | Compass - Boulder (303) 487-5472
  • Source: DENVER (RE COLORADO) MLS-CO as distributed by MLS GRID | MLS#: IR1051395 DENVER (RE COLORADO) MLS-CO as distributed by MLS GRID

Property Details

  • Status

    Active

  • Type

    Single Family Residence

  • No. of Stories

    -

  • County

    Boulder County

  • City

    Boulder

  • Neighborhood

    --

  • Year Built

    2021

  • HOA Fees

    -

  • Finished Area

    7,099 sqft

  • Lot Size

    28,700 sqft lot

  • Basement Area

    - sqft

  • MLS Name

    DENVER (RE COLORADO) MLS

  • MLS Number

    IR1051395

  • MLS Status

    Active

  • Days on Market

    273

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Location

Facts & Features

Rooms

  • Bedrooms & bathrooms

    Bedrooms: 4

    Bathrooms: 5

  • Kitchen

    Level: Main

    Area: Square Feet

    Dimensions: 350.00

  • Game Room

    Level: Lower

    Area: Square Feet

    Dimensions: 400.00

  • Dining Room

    Level: Main

  • Laundry

    Level: Main

    Area: Square Feet

    Dimensions: 99.00

  • Bathroom Full

    Level: Main

  • Bathroom Three Quarter

    Level: Upper

  • Bathroom Three Quarter

    Level: Lower

  • Bedroom

    Level: Upper

    Area: Square Feet

    Dimensions: 240.00

  • Living Room

    Level: Main

    Area: Square Feet

    Dimensions: 806.00

  • Bathroom Half

    Level: Main

  • Bedroom

    Level: Main

    Area: Square Feet

    Dimensions: 289.00

  • Bedroom

    Level: Lower

    Area: Square Feet

    Dimensions: 256.00

  • Bathroom Three Quarter

    Level: Upper

  • Bedroom

    Level: Upper

    Area: Square Feet

    Dimensions: 204.00

  • Office

    Level: Main

    Area: Square Feet

    Dimensions: 272.00

Interior

  • Heating

    Radiant

  • Sewer

    Public Sewer

  • Window Features

    Double Pane Windows, Window Coverings

  • Interior Features

    Eat In Kitchen, Five Piece Bath, Kitchen Island, Open Floorplan, Pantry, Vaulted Ceiling(s), Walk In Closet(s), Wet Bar

  • Appliances

    Bar Fridge, Dishwasher, Disposal, Double Oven, Dryer, Freezer, Microwave, Oven, Refrigerator, Trash Compactor, Washer

  • Cooling

    Central Air

  • Exterior Features

    Dog Run, Gas Grill, Spa/hot Tub

  • Flooring

    Tile, Wood

Construction

  • Year Built

    Year Built: 2021

  • Home type

    Single Family Residence

  • Architectural Style

    Contemporary

  • Construction Materials

    Block, Brick, Stone, Frame

  • Roof

    Composition

Utilities & Energy

  • Laundry Features

    In Unit

  • Water Source

    Public

  • Parking Features

    Heated Garage, Oversized

  • Fireplace Features

    Gas, Living Room

  • Utilities

    Cable Available, Electricity Available, Internet Access (wired), Natural Gas Available

  • Basement

    Full

  • Pool Features

    Private

  • Security Features

    Fire Sprinkler System, Smoke Detector(s)

Other Features

  • Vegetation

    Grassed, Wooded

  • Lot Features

    Level, Sprinklers In Front

  • Subdivision Name

    Carolyn Heights

  • Patio And Porch Features

    Patio

Price History

DateEventPrice

06/04/2026

Source: mls_logoDENVER (RE COLORADO) MLS-CO #RECIR1051395

Listed for Sale

$12,000,000 -7.69%

$1,905/sqft

02/19/2026

Source: mls_logoDENVER (RE COLORADO) MLS-CO #RECIR1051395

Contingent (Active Under Contract)

$13,000,000

$2,063/sqft

02/11/2026

Source: mls_logoDENVER (RE COLORADO) MLS-CO #RECIR1051395

Listed for Sale

$13,000,000

$2,063/sqft

12/07/2025

Source: mls_logoDENVER (RE COLORADO) MLS-CO as distributed by MLS GRID #RECIR1025368

Listing Removed

$13,000,000

$2,063/sqft

01/29/2025

Source: mls_logoDENVER (RE COLORADO) MLS-CO #RECIR1025368

Coming Soon

$13,000,000

$2,063/sqft

Show more

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