3633 21st St
Boulder, CO 80304
- 7 beds
- 5 baths
- 6,988 sqft
- ~3/4 acre lot
- $1,645 per sqft
- 2024 build
- – on site
Exquisite secluded sanctuary in the heart of Carolyn Heights. Tucked into one of Boulder's most prestigious enclaves, this estate offers a rare fusion of luxury, privacy, and relaxed sophistication . Set on a serene, tree-lined .81-acre level lot, this 7-bedroom, 5-bathroom oasis is where inspired design meets effortless living. Stunning views of the Flatirons awaken you each morning from your bed. Those same views tease your senses from the expansive patios with fully retractable doors that blur the lines from inside to outside. Bathed in natural light from soaring windows and skylights, every detail has been thoughtfully curated. Custom walnut doors and paneling welcome you into the home and invite you to explore. The chef's kitchen is a showstopper-featuring custom cabinetry, an oversized marble island, and top-of-the-line Thermador appliances. The open-concept layout flows seamlessly into a lush backyard oasis, perfect for gatherings or quiet moments of retreat by the fire pit. The primary suite is a haven unto itself with vaulted ceilings, a spa-inspired bath, spacious walk-in closet, and private deck access. With multiple flexible living spaces-including a dedicated home office and media room, this home is ready to adapt to your every need. Located moments from North Boulder's best hiking trails, cycling routes, farmers markets, and local eateries-yet nestled in the peaceful privacy of a mature, sought-after neighborhood. Elevated living starts here. LIVE BOULDER, LOVE BOULDER!
Last checked:
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Last updated Apr 18, 2025
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MLS# 1031592 —
This home is listed in more than one place. See it here.
The Building
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Year Built:2024
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New Construction:true
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Construction Materials:Wood/Frame
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Architectural Style:Contemporary/Modern
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Total SqFt:6,988 Sqft
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Building Area Total:4798
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Roof:Composition
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Levels:Tri-Level
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Basement:Full
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Stories:3
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Direction Faces:South
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Window Features:Wood Frames
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Patio And Porch Features:Patio
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Accessibility Features:Level Lot
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Above Grade Finished Area:4798
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Below Grade Finished Area:2190
Interior
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Interior Features:Study Area
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Flooring:Wood Floors
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Fireplace:true
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Fireplace Features:Gas
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Living Room Level:Main
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Living Room Features:Wood Floor
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Kitchen Level:Main
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Kitchen Features:Wood Floor
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Dining Room Level:Main
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Dining Room Features:Wood Floor
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Laundry Features:Main Level
Room Dimensions
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Living Area:6988
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Study Length:19
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Living Area Units:Square Feet
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Living Area Source:Assessor
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Main Floor SqFt:2192
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Living Room Area:702
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Living Room Length:27
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Living Room Width:26
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Kitchen Length:16
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Kitchen Area:256
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Kitchen Width:16
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Dining Room Area:210
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Dining Room Length:15
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Dining Room Width:14
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Rec Room Length:35
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Master Bedroom Area:416
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Master Bedroom Width:16
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Master Bedroom Length:26
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Bedroom Area:168
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Bedroom Length:14
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Bedroom Width:12
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Bedroom 2 Area:210
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Bedroom 2 Length:15
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Bedroom 3 Length:15
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Bedroom 2 Width:14
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Bedroom 4 Length:22
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Bedroom 3 Area:195
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Bedroom 3 Width:13
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Bedroom 5 Length:15
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Bedroom 4 Area:242
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Bedroom 4 Width:11
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Bedroom 5 Area:195
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Bedroom 5 Width:13
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Laundry Room Length:14
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Laundry Room Width:10
Financial & Terms
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Listing Terms:Cash
Location
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Coordinates:-105.27163, 40.04178
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Latitude:40.04178
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Longitude:-105.27163
The Property
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Property Type:Residential
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Property Subtype:Residential-Detached
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Property Condition:New Construction
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Parcel Number:R0004105
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Lot Features:Lawn Sprinkler System
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Lot Size Acres:0.81
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Lot Size SqFt:35,311 Sqft
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Lot Size Area:35311
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Lot Size Units:Square Feet
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Zoning:RES
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View:Foothills View
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Possible Use:Single Family
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Exclusions:Sellers personal property and any staging items
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Horse:false
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Fencing:Partial
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Waterfront:false
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Has Water Rights:No
Listing Agent
- Contact info:
- No listing contact info available
Taxes
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Tax Year:2024
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Tax Annual Amount:$29,936
Beds
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Bedrooms Total:7
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Bedroom Level:Lower
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Bedroom Features:Carpet
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Bedroom 2 Level:Upper
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Bedroom 2 Features:Wood Floor
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Bedroom 3 Level:Upper
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Bedroom 3 Features:Wood Floor
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Bedroom 4 Level:Upper
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Bedroom 4 Features:Carpet
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Bedroom 5 Level:Upper
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Bedroom 5 Features:Carpet
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Master Bedroom Level:Upper
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Master Bedroom Features:Carpet
Baths
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Total Baths:5
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Three Quarter Baths:1
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Full Baths:3
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Half Baths:1
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Master Bath Features:Tub+Shower Primary, Luxury Features Primary Bath, 5 Piece Primary Bath
The Listing
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Virtual Tour URL Unbranded:https://vimeo.com/1076220353
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Special Listing Conditions:Private Owner
Heating & Cooling
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Heating:Hot Water
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Heating:true
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Cooling:Room Air Conditioner
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Cooling:true
Utilities
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Utilities:Natural Gas Available
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Gas:Natural Gas, Xcel
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Electric:Electric, Xcel
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Sewer:City Sewer
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Water Source:City Water, City of Boulder
Appliances
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Appliances:Gas Range/Oven
Schools
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Elementary School:Columbine
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Middle School:Centennial
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High School:Boulder
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High School District:Boulder Valley Dist RE2
The Community
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Association:false
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Subdivision Name:21st/Linden Sub
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Spa:false
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Senior Community:false
Parking
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Parking Features:Oversized
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Garage Spaces:3
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Garage:true
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Garage SqFt:768 Sqft
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Garage Type:Attached
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Attached Garage:true
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Covered Spaces:3
Monthly cost estimate

Asking price
$11,500,000
Expense | Monthly cost |
---|---|
Mortgage
This calculator is intended for planning and education purposes only. It relies on assumptions and information provided by you regarding your goals, expectations and financial situation, and should not be used as your sole source of information. The output of the tool is not a loan offer or solicitation, nor is it financial or legal advice. |
$61,578
|
Taxes | $2,494 |
Insurance | $3,162 |
Utilities | $240 See report |
Total | $67,474/mo.* |
*This is an estimate |
Walk Score®
Provided by WalkScore® Inc.
Walk Score is the most well-known measure of walkability for any address. It is based on the distance to a variety of nearby services and pedestrian friendliness. Walk Scores range from 0 (Car-Dependent) to 100 (Walker’s Paradise).
Bike Score®
Provided by WalkScore® Inc.
Bike Score evaluates a location's bikeability. It is calculated by measuring bike infrastructure, hills, destinations and road connectivity, and the number of bike commuters. Bike Scores range from 0 (Somewhat Bikeable) to 100 (Biker’s Paradise).
Transit Score®
Provided by WalkScore® Inc.
Transit Score measures a location's access to public transit. It is based on nearby transit routes frequency, type of route (bus, rail, etc.), and distance to the nearest stop on the route. Transit Scores range from 0 (Minimal Transit) to 100 (Rider’s Paradise).
Soundscore™
Provided by HowLoud
Soundscore is an overall score that accounts for traffic, airport activity, and local sources. A Soundscore rating is a number between 50 (very loud) and 100 (very quiet).
Air Pollution Index
Provided by ClearlyEnergy
The air pollution index is calculated by county or urban area using the past three years data. The index ranks the county or urban area on a scale of 0 (best) - 100 (worst) across the United Sates.
Sale history
Date | Event | Source | Price | % Change |
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4/18/25
Apr 18, 2025
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Listed / Active | IRES | $11,500,000 | 228.6% (30.0% / YR) |
9/7/17
Sep 7, 2017
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IRES | $3,500,000 |