


3621 21st StreetBoulder, CO 80304
Single Family · 4 Beds · 1 Full Bath · 1 Half Bath · 3 Three Quarter Baths · 7,099 Sq. ft. | 0.66 Acres3621 21st Street Overview
- Time on Site:
- 138 days
- Visits:
- 2
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.
3621 21st Street Facts & Features
- Type Single Family
- Sq. ft. 7,099
- Price/Sq.ft. $1,690
- Lot 0.66 Acres
Details
General
Association/HOA
- Association: false
School Information
- School District: Boulder Valley RE 2
- Elementary School: Crest View
- Middle Or Junior School: Centennial
- High School: Boulder
Listing Information
- Concessions: No
Building Information
- Year Built: 2021
Location/Region
- Country: US
- County Or Parish: Boulder
- Subdivision Name: Carolyn Heights
Tax Information
- Tax Annual Amount: 55752
- Tax Year: 2024
General Information
- Exclusions: Personal Property and Artwork
- Listing Terms: Cash,Conventional
- Ownership: Individual
- Parcel Number: R0004965
- Possible Use: Residential
- Property Sub Type: Single Family Residence
- Property Type: Residential
- Zoning: RES
Interior
Parking Information
- Garage Spaces: 3
Beds/Baths
- Bathrooms Full: 1
- Bathrooms Half: 1
- Bathrooms Three Quarter: 3
- Bathrooms Total: 5
- Bedrooms Total: 4
Building Interior
- Above Grade Finished Area: 4544
- Below Grade Finished Area: 1756
- Building Area Source: Other
- Building Area Total: 7099
General Information
- Appliances: Bar Fridge,Dishwasher,Disposal,Double Oven,Dryer,Freezer,Microwave,Oven,Refrigerator,Trash Compactor,Washer
- Cooling: Central Air
- Fireplace Features: Gas,Living Room
- Flooring: Tile,Wood
- Heating: Radiant
- Interior Features: Eat-in Kitchen,Five Piece Bath,Kitchen Island,Open Floorplan,Pantry,Vaulted Ceiling(s),Walk-In Closet(s),Wet Bar
- Laundry Features: In Unit
- Levels: Two
- Living Area: 6300
- Main Level Bathrooms: 2
- Main Level Bedrooms: 1
- Security Features: Fire Sprinkler System,Smoke Detector(s)
- Window Features: Double Pane Windows,Window Coverings
Exterior
Parking Information
- Parking Features: Heated Garage,Oversized
- Parking Total: 3
Lot Information
- Lot Features: Level,Sprinklers In Front
- Lot Size Acres: 0.66
- Lot Size Square Feet: 28700
- Road Surface Type: Paved
- Vegetation: Grassed,Wooded
- Water Source: Public
Building Exterior/Construction
- Architectural Style: Contemporary
- Attached Garage: true
- Construction Materials: Block,Brick,Stone,Frame
- Direction Faces: East
- Patio And Porch Features: Patio
- Roof: Composition
- Structure Type: House
General Information
- Exterior Features: Dog Run,Gas Grill,Spa/Hot Tub
- Pool Features: Private
- Road Frontage Type: Public
- Sewer: Public Sewer
- Utilities: Cable Available,Electricity Available,Internet Access (Wired),Natural Gas Available
Room Information
Room: Bathroom Three Quarter
- Level: Lower
Room: Bedroom
- Level: Lower
- Length: 16
- Width: 16
- Description: Carpet
Room: Game Room
- Level: Lower
- Length: 20
- Width: 20
- Description: Wood
Room: Bathroom Full
- Level: Main
- Features: Primary Suite
Room: Bathroom Half
- Level: Main
Room: Bedroom
- Level: Main
- Length: 17
- Width: 17
- Description: Wood
- Features: Primary Suite
Room: Dining Room
- Level: Main
- Description: Wood
Room: Kitchen
- Level: Main
- Length: 14
- Width: 25
- Description: Hardwood
Room: Laundry
- Level: Main
- Length: 11
- Width: 9
- Description: Tile
Room: Living Room
- Level: Main
- Length: 26
- Width: 31
- Description: Wood
Room: Office
- Level: Main
- Length: 17
- Width: 16
- Description: Wood
Room: Bathroom Three Quarter
- Level: Upper
Room: Bathroom Three Quarter
- Level: Upper
Room: Bedroom
- Level: Upper
- Length: 15
- Width: 16
- Description: Carpet
Room: Bedroom
- Level: Upper
- Length: 12
- Width: 17
- Description: Carpet
3621 21st Street Neighborhood
Community
80304 (Boulder) Demographics
Schools
School data courtesy of LiveBy, Inc. School ratings are based on a scale of 1-5, with 5 being the highest rating and 1 being the lowest rating.3621 21st Street Monthly Cost
3621 21st Street Market Data
Based on the last 30 days in this zip code
3621 21st Street History
| Date | Value | Agent |
|---|---|---|
| 6/4/2026Source: REColorado MLS | Active |
|
| 5/22/2026Source: REColorado MLS | Pending |
|
| 2/27/2026Source: REColorado MLS | $12,000,000 -7.7% |
|
| 2/27/2026Source: REColorado MLS | Active |
|
| 2/21/2026Source: REColorado MLS | Pending |
|
| 2/11/2026Source: REColorado MLS | February 11, 2026 |























































