3621 21st St, Boulder, CO 80304
What's special
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.
- 239 days
- 1,406
- 79
Travel times
Kitchen
Living Room
Primary Bedroom
Outdoor 1
Foyer
Zillow last checked:
Listing updated:
Patricia Dessel 303-475-6097,
Compass - Boulder
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 5
- Full bathrooms: 1
- 3/4 bathrooms: 3
- 1/2 bathrooms: 1
- Main level bathrooms: 2
Rooms
- Room types: Media Room
Primary bedroom
- Description: Wood
- Features: Luxury Features Primary Bath, 5 Piece Primary Bath
- Level: Main
- Area: 289 Square Feet
- Dimensions: 17 x 17
Bedroom 2
- Description: Carpet
- Level: Upper
- Area: 204 Square Feet
- Dimensions: 17 x 12
Bedroom 3
- Description: Carpet
- Level: Upper
- Area: 240 Square Feet
- Dimensions: 16 x 15
Bedroom 4
- Description: Carpet
- Level: Lower
- Area: 256 Square Feet
- Dimensions: 16 x 16
Dining room
- Description: Wood
- Level: Main
Kitchen
- Description: Hardwood
- Level: Main
- Area: 350 Square Feet
- Dimensions: 25 x 14
Laundry
- Description: Tile
- Level: Main
- Area: 99 Square Feet
- Dimensions: 9 x 11
Living room
- Description: Wood
- Level: Main
- Area: 806 Square Feet
- Dimensions: 31 x 26
Recreation room
- Description: Wood
- Level: Lower
- Area: 400 Square Feet
- Dimensions: 20 x 20
Study
- Description: Wood
- Level: Main
- Area: 272 Square Feet
- Dimensions: 16 x 17
Heating
- Radiant
Cooling
- Central Air
Appliances
- Included: Gas Range, Double Oven, Dishwasher, Refrigerator, Bar Fridge, Washer, Dryer, Microwave, Trash Compactor, Freezer, Gas Bar-B-Q, Disposal
- Laundry: Sink, Washer/Dryer Hookup
Features
- Eat-in Kitchen, Cathedral Ceiling(s), Open Floorplan, Pantry, Walk-In Closet(s), Wet Bar, Kitchen Island, Steam Shower, High Ceilings, Split Bedroom Plan
- Flooring: Wood
- Windows: Window Coverings
- Basement: Full
- Has fireplace: Yes
- Fireplace features: Gas, Living Room
Interior area
- Total structure area: 4,544
- Total interior livable area: 7,099 sqft
- Finished area above ground: 4,544
Video & virtual tour
Property
Parking
- Total spaces: 3
- Parking features: Garage Door Opener, Attached, Heated Garage, Oversized
- Attached garage spaces: 3
- Details: Attached
Accessibility
- Accessibility features: Level Lot, Level Drive, Accessible Doors, Main Floor Bath, Accessible Bedroom, Main Level Laundry
Features
- Levels: Two
- Stories: 2
- Patio & porch: Patio
- Exterior features: Sprinkler System
- Has private pool: Yes
- Pool features: Private
- Spa features: Heated
- Fencing: Fenced,Dog Run/Kennel
Lot
- Size: 0.66 Acres
- Features: Wooded, Evergreen Trees, Deciduous Trees, Native Plants, Level, City Limits, Paved
Details
- Parcel number: R0004965
- Zoning: RES
- Special conditions: Private Owner
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Contemporary
- Property subtype: Single Family Residence
Materials
- Frame, Brick, Block, Stone
- Roof: Composition
Condition
- New construction: No
- Year built: 2021
Utilities & green energy
- Electric: Xcel, Photovoltaics Seller Owned
- Gas: Xcel
- Sewer: Public Sewer
- Water: City
- Utilities for property: Natural Gas Available, Electricity Available, Cable Available, High Speed Avail
Green energy
- Energy efficient items: Southern Exposure, Windows
Community & HOA
Community
- Security: Fire Sprinkler System, Security System, Fire Alarm
- Subdivision: Carolyn Heights
HOA
- Has HOA: No
Location
- Region: Boulder
Financial & listing details
- Price per square foot: $1,690/sqft
- Tax assessed value: $9,471,600
- Annual tax amount: $55,752
- Date on market: 2/12/2026
- Listing terms: Cash,Conventional
- Exclusions: Personal Property and Artwork
- Electric utility on property: Yes
- Road surface type: Asphalt
Price history
| Date | Event | Price |
|---|---|---|
| 6/4/2026 | Listed for sale | $12,000,000$1,690/sqft |
Source:  REcolorado as distributed by MLS GRID #IR1051395 Report a problem | ||
| 5/22/2026 | Pending sale | $12,000,000$1,690/sqft |
Source: REcolorado as distributed by MLS GRID #IR1051395 Report a problem | ||
| 2/28/2026 | Price change | $12,000,000-7.7%$1,690/sqft |
Source:  IRES as distributed by MLS GRID #1051395 Report a problem | ||
| 2/21/2026 | Pending sale | $13,000,000$1,831/sqft |
Source: REcolorado as distributed by MLS GRID #IR1051395 Report a problem | ||
| 2/12/2026 | Listed for sale | $13,000,000$1,831/sqft |
Source: IRES as distributed by MLS GRID #1051395 Report a problem | ||
| 12/8/2025 | Listing removed | $13,000,000$1,831/sqft |
Source: IRES as distributed by MLS GRID #1025368 Report a problem | ||
| 1/31/2025 | Listed for sale | $13,000,000$1,831/sqft |
Source: IRES as distributed by MLS GRID #1025368 Report a problem | ||
| 12/5/2024 | Listing removed | $13,000,000$1,831/sqft |
Source: IRES as distributed by MLS GRID #1019193 Report a problem | ||
| 9/23/2024 | Listed for sale | $13,000,000+30%$1,831/sqft |
Source: IRES as distributed by MLS GRID #1019193 Report a problem | ||
| 6/13/2022 | Sold | $10,000,000+315.1%$1,409/sqft |
Source: IRES as distributed by MLS GRID #976468 Report a problem | ||
| 2/18/2020 | Sold | $2,409,000-3.2%$339/sqft |
Source: Public Record Report a problem | ||
| 2/4/2020 | Pending sale | $2,489,000$351/sqft |
Source: Coldwell Banker Residential Brokerage - Boulder #899354 Report a problem | ||
| 11/6/2019 | Price change | $2,489,000-4.3%$351/sqft |
Source: Coldwell Banker Residential Brokerage - Boulder #899354 Report a problem | ||
| 9/20/2019 | Listed for sale | $2,600,000-6.1%$366/sqft |
Source: Coldwell Banker Residential Brokerage - Boulder #899354 Report a problem | ||
| 1/18/2019 | Price change | $2,770,000-2.6%$390/sqft |
Source: Estate Professionals #1862908 Report a problem | ||
| 10/15/2018 | Price change | $2,845,000-5%$401/sqft |
Source: Estate Professionals #1862908 Report a problem | ||
| 9/22/2018 | Price change | $2,995,000+5.3%$422/sqft |
Source: RE/MAX of Boulder #6221485 Report a problem | ||
| 8/14/2018 | Price change | $2,845,000-1.7%$401/sqft |
Source: RE/MAX of Boulder, Inc #848244 Report a problem | ||
| 6/21/2018 | Price change | $2,895,000-3.3%$408/sqft |
Source: RE/MAX of Boulder, Inc #848244 Report a problem | ||
| 4/27/2018 | Listed for sale | $2,995,000+103.3%$422/sqft |
Source: RE/MAX of Boulder, Inc #848244 Report a problem | ||
| 4/5/2007 | Sold | $1,473,500+13%$208/sqft |
Source: Public Record Report a problem | ||
| 12/23/2002 | Sold | $1,304,000+154.7%$184/sqft |
Source: Public Record Report a problem | ||
| 4/10/2000 | Sold | $512,000$72/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $55,752 +1.8% | $591,975 -7.2% |
| 2024 | $54,784 +275.2% | $638,062 -1% |
| 2023 | $14,600 +4.9% | $644,251 +309.8% |
| 2022 | $13,922 +1.9% | $157,223 -2.8% |
| 2021 | $13,665 | $161,747 +3% |
| 2020 | $13,665 +6.3% | $156,993 |
| 2019 | $12,859 | $156,993 +5.9% |
| 2018 | $12,859 | $148,313 -9.5% |
| 2017 | $12,859 +1.5% | $163,968 +12.1% |
| 2016 | $12,664 +5.6% | $146,297 +24% |
| 2015 | $11,992 +20.9% | $117,999 |
| 2014 | $9,921 +7.4% | $117,999 |
| 2013 | $9,236 +0.9% | $117,999 +7% |
| 2012 | $9,154 -8.9% | $110,246 |
| 2011 | $10,049 +7.1% | -- |
| 2010 | $9,383 -1.6% | $124,330 -14.3% |
| 2009 | $9,538 +3.5% | $145,150 -2.6% |
| 2008 | $9,212 +17.8% | $149,070 |
| 2007 | $7,822 +3.9% | $149,070 +21.8% |
| 2006 | $7,531 +4.1% | $122,400 |
| 2005 | $7,235 +0.7% | $122,400 +3.4% |
| 2004 | $7,184 +15% | $118,410 |
| 2003 | $6,250 +94.2% | $118,410 |
| 2002 | $3,218 | -- |
| 2001 | -- | $556,000 |
Monthly payment
Estimated market value
Not available
Estimated sales range
Not available
Not available
Climate risks
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