3621 21st St
Boulder, CO 80304
Carolyn Heights
4 Beds
4.5 Baths
7,099 sqft (on 0.66 acres)
4 Beds
4.5 Baths
7,099 sqft
(on 0.66 acres)
Local Information
© Google
-- mins to
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.
Home Highlights
Parking
3 Car Garage
Outdoor
Patio, Pool
A/C
Heating & Cooling
HOA
None
Price/Sqft
$1,690
Listed
104 days ago
Home Details for 3621 21st St
|
|---|
Interior Details Basement: FullNumber of Rooms: 10Types of Rooms: Primary Bedroom, Bedroom 2, Bedroom 3, Bedroom 4, Dining Room, Kitchen, Laundry, Living Room, Recreation Room, StudyWet Bar |
Beds & Baths Number of Bedrooms: 4Number of Bathrooms: 5Number of Bathrooms (full): 1Number of Bathrooms (three quarters): 3Number of Bathrooms (half): 1Number of Bathrooms (main level): 2 |
Dimensions and Layout Living Area: 7099 Square Feet |
Appliances & Utilities Utilities: Natural Gas Available, Electricity Available, Cable Available, High Speed AvailAppliances: Gas Range, Double Oven, Dishwasher, Refrigerator, Bar Fridge, Washer, Dryer, Microwave, Trash Compactor, Freezer, Gas Bar-B-Q, DisposalDishwasherDisposalDryerLaundry: Sink,Washer/Dryer HookupMicrowaveRefrigeratorWasher |
Heating & Cooling Heating: RadiantHas CoolingAir Conditioning: Central AirHas HeatingHeating Fuel: Radiant |
Fireplace & Spa Fireplace: Gas, Living RoomSpa: HeatedHas a Fireplace |
Gas & Electric Electric: Xcel, Photovoltaics Seller OwnedGas: XcelHas Electric on Property |
Windows, Doors, Floors & Walls Window: Window CoveringsFlooring: Wood |
Levels, Entrance, & Accessibility Stories: 2Levels: TwoAccessibility: Level Lot, Level Drive, Accessible Doors, Main Floor Bath, Accessible Bedroom, Main Level LaundryFloors: Wood |
View No View |
Security Security: Fire Sprinkler System, Security System, Fire Alarm |
|
|---|
Exterior Home Features Roof: CompositionPatio / Porch: PatioFencing: Fenced, Dog Run/KennelExterior: Sprinkler SystemHas a Private PoolSprinkler System |
Parking & Garage Number of Garage Spaces: 3Number of Covered Spaces: 3Other Parking: AttachedNo CarportHas a GarageHas an Attached GarageParking Spaces: 3Parking: Garage Door Opener,Attached,Heated Garage,Oversized |
Pool Pool: PrivatePool |
Frontage Road Frontage: City StreetRoad Surface Type: AsphaltNot on Waterfront |
Water & Sewer Sewer: Public Sewer |
Farm & Range Does Not Include Irrigation Water Rights |
Finished Area Finished Area (above surface): 4544 Square FeetFinished Area (below surface): 1756 Square Feet |
|
|---|
Days on Market: 104 |
|
|---|
Year Built Year Built: 2021 |
Property Type / Style Property Type: ResidentialProperty Subtype: Single Family ResidenceArchitecture: Contemporary |
Building Construction Materials: Frame, Brick, Block, StoneNot a New ConstructionNot Attached Property |
Property Information Usage of Home: Single FamilyNot Included in Sale: Personal Property and ArtworkParcel Number: R0004965 |
|
|---|
Price List Price: $12,000,000Price Per Sqft: $1,690 |
|
|---|
MLS Status: Active/Backup |
|
|---|
|
|---|
Direction & Address City: BoulderCommunity: Carolyn Heights |
School Information Elementary School: Crest ViewJr High / Middle School: CentennialHigh School: BoulderHigh School District: Boulder Valley Dist RE2 |
|
|---|
Listing Agent Listing ID: 1051395 |
|
|---|
Building Area Building Area: 6300 Square Feet |
|
|---|
No HOA |
|
|---|
Lot Area: 0.66 acres |
|
|---|
Special Conditions: Private Owner |
|
|---|
Listing Terms: Cash, Conventional |
|
|---|
Energy Efficiency Features: Southern Exposure, Windows |
|
|---|
BasementMls Number: 1051395Zillow Contingency Status: Accepting Back-up OffersAttribution Contact: 303-475-6097Above Grade Unfinished Area: 4544Activation Date: Wed Feb 11 2026Back On Market Date: Fri Feb 27 2026Showing Service Name: ShowingTime |
Last check for updates: about 15 hours ago
Listing courtesy of Patricia Dessel, (303) 475-6097
Compass - Boulder
Source: IRES as distributed by MLS GRID, MLS#1051395
Price History for 3621 21st St
| Date | Price | Event | Source |
|---|---|---|---|
| 05/22/2026 | $12,000,000 | Pending | REcolorado as distributed by MLS GRID #IR1051395 |
| 02/28/2026 | $12,000,000 | PriceChange | IRES as distributed by MLS GRID #1051395 |
| 02/21/2026 | $13,000,000 | Pending | REcolorado as distributed by MLS GRID #IR1051395 |
| 02/12/2026 | $13,000,000 | Listed For Sale | IRES as distributed by MLS GRID #1051395 |
| 12/08/2025 | $13,000,000 | ListingRemoved | IRES as distributed by MLS GRID #1025368 |
| 01/31/2025 | $13,000,000 | Listed For Sale | IRES as distributed by MLS GRID #1025368 |
| 12/05/2024 | $13,000,000 | ListingRemoved | IRES as distributed by MLS GRID #1019193 |
| 09/23/2024 | $13,000,000 | Listed For Sale | IRES as distributed by MLS GRID #1019193 |
| 06/13/2022 | $10,000,000 | Sold | IRES as distributed by MLS GRID #976468 |
| 02/18/2020 | $2,409,000 | Sold | N/A |
| 02/04/2020 | $2,489,000 | Pending | Agent Provided |
| 11/06/2019 | $2,489,000 | PriceChange | Agent Provided |
| 09/20/2019 | $2,600,000 | PriceChange | Agent Provided |
| 01/18/2019 | $2,770,000 | PriceChange | Agent Provided |
| 10/15/2018 | $2,845,000 | PriceChange | Agent Provided |
| 09/22/2018 | $2,995,000 | PriceChange | Agent Provided |
| 08/14/2018 | $2,845,000 | PriceChange | Agent Provided |
| 06/21/2018 | $2,895,000 | PriceChange | Agent Provided |
| 04/27/2018 | $2,995,000 | Listed For Sale | Agent Provided |
| 04/05/2007 | $1,473,500 | Sold | N/A |
| 12/23/2002 | $1,304,000 | Sold | N/A |
| 04/10/2000 | $512,000 | Sold | N/A |
Similar Homes You May Like
NEW CONSTRUCTION0.81 ACRESMarybeth Emerson, The Agency - Boulder
NEW CONSTRUCTION0.34 ACRESHunter Jorgensen, Compass - Boulder
0.57 ACRESJennifer Egbert, milehimodern - Boulder
NEW CONSTRUCTIONR Tim Goodacre, milehimodern - Boulder
NEW CONSTRUCTION0.68 ACRESMarybeth Emerson, The Agency - Boulder
0.82 ACRESJoyce Pollich, WK Real Estate
0.29 ACRESR Tim Goodacre, milehimodern - Boulder
0.35 ACRESLucy Conklin, Compass - Boulder
NEW CONSTRUCTION0.27 ACRESMarybeth Emerson, The Agency - Boulder
OPEN SAT, 12-4PM0.6 ACRESKathleen Haas, Colorado Realty 4 Less, LLC
1.03 ACRESeXp Realty, LLC, MLS#4453808
NEW CONSTRUCTION1.6 ACRESPatrick Brown, Compass - Boulder
NEW CONSTRUCTION0.69 ACRESLeyla Steele, RE/MAX Alliance-Boulder
4.9 ACRESJohn Hoeffler, WK Real Estate
2.44 ACRESThe Zach Zeldner Team, Compass - Boulder
1.05 ACRESJennifer Eiss, Compass - Boulder
NEW CONSTRUCTION17.77 ACRESMarybeth Emerson, The Agency - Boulder
10.5 ACRESPatrick Brown, Compass - Boulder
0.31 ACRESLovato Properties, Compass - Boulder
0.29 ACRESRedfin Corporation, MLS#5218058
14.77 ACRESReal Broker, LLC DBA Real, MLS#7120724
1.29 ACRESPatrick Brown, Compass - Boulder
0.89 ACRESJoel Ripmaster, Madison & Company Properties - Boulder
OPEN SUN, 11-1PMNEW CONSTRUCTIONBeau Burris, Burris Real Estate
39.92 ACRESMarybeth Emerson, The Agency - Boulder
229.99 ACRESThe Bernardi Group, Coldwell Banker Realty-Boulder
229.99 ACRESThe Bernardi Group, Coldwell Banker Realty-Boulder
229.99 ACRESThe Bernardi Group, Coldwell Banker Realty-Boulder
35 ACRESRyan McIntosh, LIV Sotheby's Intl Realty
NEW CONSTRUCTION3.1 ACRESJohn Canova, milehimodern - Boulder
NEW CONSTRUCTION1.66 ACRESR Tim Goodacre, milehimodern - Boulder
144.09 ACRESJennifer Egbert, milehimodern - Boulder
108 ACRESCandace Loving, Resident Realty North Metro
6.55 ACRESAnne Wells, The Agency - Boulder
NEW CONSTRUCTION5.38 ACRESAshley Stringer, The Agency - Boulder
20.28 ACRESR Tim Goodacre, milehimodern - Boulder
NEW CONSTRUCTION1.96 ACRESCompass - Denver, MLS#4950819
49.81 ACRESLucy Conklin, Compass - Boulder
18.2 ACRESLucy Conklin, Compass - Boulder
NEW CONSTRUCTION6.98 ACRESZachary Nassar, Nassar Realty LLC
See more homes for sale inBoulder
New Listings near 3621 21st St
- NEW CONSTRUCTION17.77 ACRESMarybeth Emerson, The Agency - Boulder
- 2.44 ACRESThe Zach Zeldner Team, Compass - Boulder
- NEW CONSTRUCTION0.27 ACRESMarybeth Emerson, The Agency - Boulder
- 0.35 ACRESLucy Conklin, Compass - Boulder
- 0.89 ACRESJoel Ripmaster, Madison & Company Properties - Boulder
- 10.5 ACRESPatrick Brown, Compass - Boulder
- 1.29 ACRESPatrick Brown, Compass - Boulder
- OPEN SUN, 11-1PMNEW CONSTRUCTIONBeau Burris, Burris Real Estate
- NEW CONSTRUCTION1.6 ACRESPatrick Brown, Compass - Boulder
- 0.29 ACRESR Tim Goodacre, milehimodern - Boulder
- 0.82 ACRESJoyce Pollich, WK Real Estate
- NEW CONSTRUCTION0.81 ACRESMarybeth Emerson, The Agency - Boulder
- 14.77 ACRESReal Broker, LLC DBA Real, MLS#7120724
- 0.29 ACRESRedfin Corporation, MLS#5218058
- NEW CONSTRUCTION0.68 ACRESMarybeth Emerson, The Agency - Boulder
- See more homes for sale inBoulder
Property Tax and Assessment
| Year | 2025 |
|---|---|
| Tax | $55,752 |
| Assessment | $9,471,600 |
Home facts updated by county records
Comparable Sales for 3621 21st St
Address | Distance | Property Type | Sold Price | Sold Date | Bed | Bath | Sqft |
|---|---|---|---|---|---|---|---|
0.16 | Single-Family Home | $4,300,000 | 05/29/25 | 5 | 5.5 | 9,603 | |
0.10 | Single-Family Home | $3,500,000 | 08/11/25 | 4 | 3 | 3,564 | |
0.39 | Single-Family Home | $5,355,000 | 10/28/25 | 5 | 4 | 5,946 | |
0.02 | Single-Family Home | $2,250,000 | 04/30/26 | 3 | 2.5 | 2,765 | |
0.32 | Single-Family Home | $3,700,000 | 05/26/26 | 3 | 3.5 | 4,319 | |
0.52 | Single-Family Home | $5,800,000 | 05/12/26 | 7 | 5.5 | 7,124 | |
0.44 | Single-Family Home | $4,082,500 | 05/01/26 | 4 | 4.5 | 5,338 | |
0.40 | Single-Family Home | $2,180,000 | 08/25/25 | 4 | 4.5 | 4,698 | |
0.19 | Single-Family Home | $1,814,500 | 06/12/25 | 4 | 4 | 4,570 |
Nearby homes
Get a sense of prices in the area by checking nearby homes.
FOR SALENEW - 3 HRS AGORich Gribbon, RE/MAX of Boulder, Inc
FOR SALENEWOPEN SAT, 2-4PM
3D VIEWBrian Sundberg, Compass - Boulder
SOLDMAY 26, 2026Daryl Smith, RE/MAX of Boulder, Inc
NEWOPEN SAT, 11-1PMCOMING SOON 5/29The Zach Zeldner Team, Compass - Boulder
NEWCOMING SOON 5/28Colin Dart, milehimodern - Boulder
FOR SALENEW - 1 DAY AGOSummer Youngs, Property Colorado Inc
FOR SALEListings.com, MLS#3730845
COMING SOON 5/28Engel & Volkers Denver, MLS#9965888
FOR SALENEW CONSTRUCTIONSummer Youngs, Property Colorado Inc
FOR SALENEW CONSTRUCTIONSummer Youngs, Property Colorado Inc
FOR SALEEvan Lam, Colorado Key Properties
FOR SALENEW CONSTRUCTIONSummer Youngs, Property Colorado Inc
Assigned Schools
These are the assigned schools for 3621 21st St.
- Boulder High School
- 9-12
- Public
- 2074 Students
10/10GreatSchools RatingParent Rating AverageTerrible experience here. Constantly made fun of and picked on by students and teachers treated me like a total idiot. Went from being respected by peers and teachers at my old school to ridiculed and laughed at by the entire class.Other Review3mo ago - Centennial Middle School
- 6-8
- Public
- 567 Students
7/10GreatSchools RatingParent Rating AverageAs a parent, you hope for a school that sees your child, truly sees them, and helps them grow into the person they’re meant to be. Centennial doesn’t just meet that hope; it exceeds every expectation. My worries over this phase of life for my child have been replaced with joy.My daughter is thriving here in a way I never expected. From the numerous clubs that help explore talents and make new friends to dedicated teachers nurturing her talents and spark for learning. She’s discovering passions she didn’t know she had. These aren’t just activities to her anymore; they’re pieces of who she is becoming. The environment at Centennial is warm, safe and genuinely caring. My daughter says it best, “I love Centennial!”Parent Review5mo ago - Columbine Elementary School
- PK-5
- Public
- 405 Students
4/10GreatSchools RatingParent Rating AverageMy son has attended Columbine since preschool and is now in second grade. He’s part of the bilingual program and is thriving in both reading and writing in both languages. He has made many friends, and we truly enjoy being part of the school community. The teachers have been wonderful—warm, supportive, and dedicated.Parent Review7mo ago 
Check out schools near 3621 21st St.
Neighborhood Overview
Neighborhood stats provided by third party data sources.
What Locals Say about Carolyn Heights
LGBTQ Local Legal Protections
LGBTQ Local Legal Protections
Patricia Dessel, Compass - Boulder
Agent Phone: (303) 475-6097
Based on information submitted to the MLS GRID as of 2026-05-27 06:33:15 PDT. 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. Some IDX listings have been excluded from this website. Click here for more information
3621 21st St, Boulder, CO 80304 is a 4 bedroom, 5 bathroom, 7,099 sqft single-family home built in 2021. 3621 21st St is located in Carolyn Heights, Boulder. This property is currently available for sale and was listed by IRES as distributed by MLS GRID on Feb 12, 2026. The MLS # for this home is MLS# 1051395.