3621 21st St

Boulder, CO 80304

$13,000,000
Price
4
Beds
7,099 Sq. Ft.
$1,831 / Sq. Ft.
7,099
Sq. Ft.
$1,831
per Sq. Ft.
Listed By CompassVirtual Tour
Listed By CompassVirtual Tour
Meticulously crafted, masterfully built, and expertly curated this home is a true masterpiece of modern luxury and sophistication.
With its soaring ceilings and expansive windows the inside and outside blend seamlessly and bathe the home in natural light. Every aspect of this smart home seamlessly integrates technology, design, and automation to ensure security and convenience.
Coveted Carolyn Heights neighborhood with convenient proximity to downtown Boulder and Boulder's hiking and biking trails
Enjoy the serene setting of the outdoor oasis
The serene heated salt water pool and lush landscaping with mature trees envelope the yard.
The custom doors with sidelights frames the foyer and welcomes you into the home where an Italian blown glass sphere chandelier hangs prominently in the space.
Upon entry you will be greeted by soaring ceilings, large windows bathing the home in natural light and creating an indoor/outdoor connection.
The architectural grandeur is showcased by a dramatic three story open tread wood staircase with custom metal railings and illuminated by bespoke lighting and bathed in light by floor to ceiling windows.
The grand staircase sets the tone for the impressive architecture and craftsmanship throughout the home
The centerpiece of the home, the gourmet kitchen, boasts an impressive center island with seating for four, marble and quartz countertops, artisanal tile, custom contrasting white and dark cabinetry, top-tier chef's appliances, and a walk-in pantry
The centerpiece of the home, the gourmet kitchen, boasts an impressive center island with seating for four, marble and quartz countertops, artisanal tile, custom contrasting white and dark cabinetry, top-tier chef's appliances, and a walk-in pantry
Exquisite designer tile in the kitchen
Open sight lines from kitchen to indoor and outdoor living areas.
The walk in pantry has floor to ceiling custom cabinetry, quartz counters and a large window overlooking the front yard. The kitchen is complete with a SubZero refrigerator, freezer and wine bar towers plus a integrated microwave and espresso machine.
View from the kitchen to the dining and living room.
Savor meals in the dining area complemented by an elegant wet bar featuring matte black and gold tile, custom glass fronted cabinets and Italian designer lighting. The wall that frames the kitchen is clad in shiplap
The kitchen island is a perfect place to set out food for entertaining or a casual meal. High gloss lacquer cabinets and a marble countertop create a beautiful setting. There is a vegetable sink, trash compactor and dishwasher and drawers for storage
Relax in the living room and enjoy the view of the patio, pool and yard
Indoor/Outdoor living is effortless. The wall of windows floods the main level in natural light
The wall of windows provides abundant natural light into the main living spaces
The prodigious living area seamlessly integrates indoor and outdoor living with a wall of windows that leads to the covered patio and outdoor kitchen.
Living, dining and kitchen are connected and have open sight lines
A sophisticated wet bar with stunning designer tile compliments the dramatic staircase while creating an impressive focal point in the living area.
Indoor/outdoor flow with views from the living room to the pool and yard.
View from the front foyer to the front yard.
Main level office with floor to ceiling windows, soaring ceilings, custom built ins, white oak wide plank floors
Main level primary bedroom with floor to ceiling windows, custom millwork, white oak wide plank wood floors, sliding doors open to the pool.
Primary bedroom with designer lighting and automated drapery and overlooks the pool and the patio
Indulge in a spa-like bathing experience with an oversized two-person shower equipped with dual shower heads, separate steam shower, outdoor shower, dual vanities and custom mirrors
The soothing primary bathroom features premium quality finishes, including designer tile, custom cabinetry, and alluring lighting, where every detail exudes luxury.
Secondary bedroom 3 with floor to ceiling windows, ensuite bathroom, walk in closet and automated window coverings
Secondary bedroom 3 ensuite bathroom with floor to ceiling windows, designer tile and custom cabinets and large shower
Secondary bedroom 2 with floor to ceiling windows, ensuite bathroom, walk in closet and automated window coverings
Secondary bedroom 2 ensuite bathroom with custom cabinets, quartz counters, and large shower.
The upper level office with custom cabinetry, white oak hardwood floors, vaulted ceilings, and private deck. This office is already equipped with plumbing for a bathroom, allowing for easy conversion into a fifth bedroom with an ensuite.
Beautiful laundry room with designer tile and custom cabinets. The laundry room is on the main level and adjacent to the mudroom which features custom cubbies and cabinets to store all of your coats, shoes and gear, plus a walk-in closet for more storage.
Lower level secondary bedroom 4 with large windows and ensuite bathroom
Secondary bedroom 4 with ensuite bathroom
Gym with hardwood floors, in ceiling speakers, barn doors and wall of mirrors
Descend the three-story staircase to the lower level where you can exercise in the gym with wall-to-wall mirrors or unwind by watching movies in the media room.
Private and professionally landscaped, fully fenced, level lot with mature trees. Owned solar panels.
Professionally landscaped fully fenced yard. The landscaping blooms throughout the spring, summer and fall
Heated saltwater pool perfect for summer timer leisure.
Private outdoor covered patio with outdoor kitchen
Private outdoor covered patio with outdoor kitchen
Property schematic
Carolyn Heights is conveniently located in central Boulder
Main level floor plan
Upper and lower level floorplan

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...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.

Listing Agent

  1. Tricia Dessel

    Tricia Dessel

    Listing Agent

    Compass

    tricia.dessel@compass.com

    P: (303)-475-6097

    CallTextEmail

Property Details for 3621 21st Street

Locale
Boulder
Description 1
House
LISTING UPDATED: 02/12/2026 03:28 PM

Property Details for 3621 21st Street

StatusActive
MLS #1051395
Days on Compass10
Taxes$55,752 / year
HOA Fees-
Condo/Co-op Fees-
Compass TypeSingle Family
MLS TypeResidential-Detached / Single Family Residence
Year Built2021
Lot Size0.66 AC / 28,749 SF
CountyBoulder County

Location

Add your commute

Virtual Tour

Building Information for 3621 21st Street

Stories-Year Built2021Building Size-Lot Size0.66 AC / 28,749 SF

Payment Calculator

$68,006 per month

30 year fixed, 6.15% Interest

Principal and Interest

$63,360

Property Taxes

$4,646

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

Property Information for 3621 21st Street

Summary
Location and General Information
  • Road Access 2: City Street
  • Latitude: 40.04
  • Longitude: -105.27
Parking
  • Garage SqFt: 1438
  • Total Parking: 3.00
  • Parking Features: Garage Door Opener, Attached
Taxes and HOA Information
  • Has HOA: No
  • HOA Fee: $.00
  • Legal Description: LOT 5 BLK 7 CAROLYN HEIGHTS
  • Tax Information: No
  • HOA2 Fee Amount: $0
  • Tax Year: 2024
  • HOA Transfer Fee: No
  • HOA 2 Transfer Fee: No
  • Has Association Fee: No
  • Has Association 2 Fee: No
  • Has Association Reserve: No
  • Has Association 2 Reserve: No
  • Tax Annual Amount: $55,752
  • Parcel Number: R0004965
Virtual Tour
Property
Lot Information
  • Lot Improvements: Wooded, Evergreen Trees, Deciduous Trees, Native Grass, Level, House Faces East, City Limits, Paved
  • Lot Size Area: 28,700.00
  • Has Irrigation Water Rights: No
  • Has Improvements: No
  • Vegetation: Grassed, Wooded
Property and Assessments
  • Total Finished Area Source: Other
  • Living SqFt: 4544
  • Above Grade Finished Area Source: 4544
  • Sq Ft Apx: 1756
  • Total Finished Area: 6300
  • Pano Url Position: 1
  • Property Attached YN: No
  • Are Ditches Active: No
  • Security Features: Fire Sprinkler System, Security System
  • New Construction YN: No
  • Levels: Two
Utilities
  • Solar PV Kilowatts: 29.90
  • Solar PV Year Installed: 2021
  • Has Solar Photovoltaic: 1
  • Solar PV Kilowatts: 29.90
  • Solar PV Year Installed: 2021
  • Electric: Xcel
  • Sewer: Public Sewer
  • Green Energy Efficient: Southern Exposure, Windows, Photovoltaic Owned
Interior and Exterior Features
Exterior Features
  • Construction Materials: Frame, Brick, Block, Stone
  • Exterior Features: Sprinkler System, Hot Tub, Heated Garage, Oversized Garage
  • Flooring: Wood
  • Outdoor Features: Private
Interior Features
  • Interior Features: Eat-in Kitchen, Cathedral Ceiling(s), Open Floorplan, Pantry, Walk-In Closet(s), Wet Bar, Washer/Dryer Hookup, Kitchen Island, Steam Shower, High Ceilings, Split Bedroom Plan, Luxury Features Primary Bath, 5 Piece Primary Bath
  • Laundry Features: Gas Range, Double Oven, Dishwasher, Refrigerator, Bar Fridge, Washer, Dryer, Microwave, Trash Compactor, Freezer, Gas Bar-B-Q, Disposal, Fire Alarm, Sink
  • Window Features: Window Coverings
  • Fireplaces 1: Gas, Living Room
  • All Bedrooms Conform: Yes
  • Full Bathrooms: 1
  • Half Bathrooms: 1
  • Rough-in Bathrooms: 0
  • Three Quarters Bathrooms: 3
  • Baths Full Additional: 0
  • Baths Full Basement: 0
  • Baths Full Upper: 0
  • Baths Full Main: 1
  • Baths Full Lower: 0
  • Baths Half Additional: 0
  • Baths Half Basement: 0
  • Baths Half Upper: 0
  • Baths Half Main: 1
  • Baths Half Lower: 0
  • Baths Three Quarters Additional: 0
  • Baths Three Quarters Basement: 0
  • Baths Three Quarters Lower: 1
  • Baths Three Quarters Upper: 2
  • Baths Three Quarters Main: 0
Room Information
Room 1
  • RoomDescription: Carpet
  • RoomLength: 12.0
  • RoomLevel: Upper
  • RoomType: Bedroom 2
  • RoomWidth: 17.0
Room 2
  • RoomDescription: Carpet
  • RoomLength: 15.0
  • RoomLevel: Upper
  • RoomType: Bedroom 3
  • RoomWidth: 16.0
Room 3
  • RoomDescription: Carpet
  • RoomLength: 16.0
  • RoomLevel: Lower
  • RoomType: Bedroom 4
  • RoomWidth: 16.0
Room 4
  • RoomDescription: Wood
  • RoomLevel: Main
  • RoomType: Dining Room
Room 5
  • RoomDescription: Hardwood
  • RoomLength: 14.0
  • RoomLevel: Main
  • RoomType: Kitchen
  • RoomWidth: 25.0
Room 6
  • RoomDescription: Tile
  • RoomLength: 11.0
  • RoomLevel: Main
  • RoomType: Laundry
  • RoomWidth: 9.0
Room 7
  • RoomDescription: Wood
  • RoomLength: 26.0
  • RoomLevel: Main
  • RoomType: Living Room
  • RoomWidth: 31.0
Room 8
  • RoomDescription: Wood
  • RoomLength: 17.0
  • RoomLevel: Main
  • RoomType: Primary Bedroom
  • RoomWidth: 17.0
  • Room Features: Luxury Features Primary Bath, 5 Piece Primary Bath
Room 9
  • RoomDescription: Wood
  • RoomLength: 20.0
  • RoomLevel: Lower
  • RoomType: Recreation Room
  • RoomWidth: 20.0
Room 10
  • RoomDescription: Wood
  • RoomLength: 17.0
  • RoomLevel: Main
  • RoomType: Study
  • RoomWidth: 16.0
Rental
Rental Information
  • Horse YN: No
  • Occupant Type: Owner

Property History for 3621 21st Street

DateEvent & SourcePriceAppreciation
Jun 13, 2022

Sold (Public Record)

Public Record #1492146539

$10,000,000

+84.9% / yr

Feb 18, 2020

Sold (Public Record)

Public Record #663236153

$2,409,000

+3.9% / yr

Mar 30, 2007

Sold (Public Record)

Public Record #217046609

$1,473,500

+2.9% / yr

Dec 23, 2002

Sold (Public Record)

Public Record #106740622

$1,304,000—
DateEvent & SourcePrice
06/13/2022

Sold (Public Record)

Public Record #1492146539

$10,000,000

+84.9% / yr

02/18/2020

Sold (Public Record)

Public Record #663236153

$2,409,000

+3.9% / yr

03/30/2007

Sold (Public Record)

Public Record #217046609

$1,473,500

+2.9% / yr

12/23/2002

Sold (Public Record)

Public Record #106740622

$1,304,000

For completeness, Compass often displays two records for one sale: the MLS record and the public record.

Public Records for 3621 21st Street

Taxable ValueLand$70,381Additions$521,594Total$591,975
Tax Record2025$56,445 ($4,704 / month)
Home Facts
Beds4Total Finished SqFt7,105 SqFtAbove Grade Finished SqFt4,542 SqFtFinished Basement SqFt2,563 SqFtLot Size28,706 SqFtStyleSingle Family ResidenceYear Built2021Zoning1112CountyBOULDERAPN1463-19-1-07-005

Schools near 3621 21st Street

This home is within Boulder Valley Re 2 School District.
Rating
School
Type
Grades
Distance
Columbine Elementary School
Public - PK to 5
Centennial Middle School
Public - 6 to 8
Boulder High School
Public - 9 to 12
University Hill Elementary School
Public - PK to 5
Rating
School
Distance
Columbine Elementary School
PublicPK to 5

Centennial Middle School
Public6 to 8

Boulder High School
Public9 to 12

University Hill Elementary School
PublicPK to 5

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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More information about 3621 21st Street, Boulder, CO 80304

3621 21st Street is a single family home for sale in Boulder, CO 80304. This property was listed for sale on February 11, 2026 by Compass, it's currently listed at $13,000,000. It has been on the market for a total of 10 days and was last sold on June 13, 2022. This listing's school district is Boulder Valley Re 2 School District. Nearby schools include Columbine Elementary School, Centennial Middle School and Boulder High School. 3621 21st Street is a 4-bed, 5-bath, 7,099 sqft single family home built in 2021.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity. Subject to change at any time. Compass makes no guarantee, warranty or representation regarding the accuracy of any waterfront feature, water view or waterfront view.

Based on information submitted to the MLS GRID as of 02/12/2026 03:28 PM. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information. Properties displayed may be listed or sold by various participants in the MLS. IDX information is provided exclusively for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. The data is deemed reliable but is not guaranteed by MLS GRID. Use of the MLS GRID data may be subject to an end user license agreement prescribed by the applicable MLS of the Member Participant, if any, and as amended from time to time.