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- Description
- Property Details
- Location
- Facts & Features
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$12,000,000
Monthly Est:$59,728
4 Beds
- 5 Baths
1 full bath + 1 half bath
7,099sqft
3621 21st Street, Boulder, CO 80304
$12,000,000
$59,728/moEst:
Get Pre-Approved
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

Property Details
Status
Active
Type
Single Family Residence
No. of Stories
-
County
City
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
| Date | Event | Price |
|---|---|---|
06/04/2026 Source: | Listed for Sale | $12,000,000 -7.69% $1,905/sqft |
02/19/2026 Source: | Contingent (Active Under Contract) | $13,000,000 $2,063/sqft |
02/11/2026 Source: | Listed for Sale | $13,000,000 $2,063/sqft |
12/07/2025 Source: | Listing Removed | $13,000,000 $2,063/sqft |
01/29/2025 Source: | Coming Soon | $13,000,000 $2,063/sqft |
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