503 Kalmia Ave
Boulder, CO 80304
- 5 beds
- 4 baths
- 5,113 sqft
- ~1/2 acre lot
- $909 per sqft
- 1978 build
- – on site
Open House, Saturday (4/5) 1-3PM, tucked behind a private, gated entrance on a lush 0.57-acre lot, this home, remodeled by renowned architect Harvey Hine, offers the pinnacle of luxury and modern design. Step through the oversized wood pivot door that leads to an open-concept great room with soaring vaulted ceilings, a dramatic fireplace, and warm maple hardwood floors. Expansive windows fill the space with natural light and offer seamless access to the rear deck, perfect for entertaining. The chef's kitchen features custom cabinetry, stone countertops, tile backsplashes, a Wolf range, and a Subzero refrigerator. A spacious walk-in pantry and waterfall island enhance functionality and elegance. A cozy library lounge area leads to a home office or fifth bedroom with direct front patio access. The main level primary suite is a serene retreat with a spacious bedroom, walk-in closet, and a spa-like en suite bathroom. A fully finished lower level with media room, fitness area, and guest suite provides ample space for family or visitors. The striking wood exterior, metal roof, and grand slate patio set the tone for a residence that exudes sophistication and tranquility. The expansive grounds offer tranquility with a water feature, several seating areas, stone patios, a deck, 40-50' evergreens surrounding the property, natural boulders, lush landscaping, and abuts a seasonal ditch. Don't miss the bonus heated studio, which is ideal for a gym, art studio, or office. Additional amenities include an attached two-car garage, a dramatic illuminated gated driveway, and ample extra parking. Located in Newlands, with easy access to North Boulder, downtown, hiking trails, open space, and top-rated schools, this home offers the perfect blend of luxury, privacy, and convenience. Don't miss the virtual tour and listing video.
Last checked:
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Last updated Apr 8, 2025
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MLS# 1027404 —
This home is listed in more than one place. See it here.
The Building
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Year Built:1978
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New Construction:false
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Construction Materials:Wood/Frame
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Architectural Style:Contemporary/Modern
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Building Area Total:3329
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Total SqFt:5381
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Roof:Metal
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Levels:One
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Stories:1
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Basement:Partially Finished
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Window Features:Window Coverings
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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:3329
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Below Grade Finished Area:2052
Interior
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Interior Features:Eat-in Kitchen
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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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Family Room Level:Basement
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Flooring:Wood Floors
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Fireplace:true
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Fireplace Features:Gas
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Laundry Features:Washer/Dryer Hookups
Room Dimensions
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Living Area:5113
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Living Area Units:Square Feet
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Living Area Source:Other
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Main Floor SqFt:3329
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Living Room Area:255
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Living Room Length:17
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Living Room Width:15
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Kitchen Length:14
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Kitchen Area:238
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Kitchen Width:17
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Dining Room Area:195
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Dining Room Length:13
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Dining Room Width:15
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Family Room Area:345
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Family Room Length:15
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Family Room Width:23
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Master Bedroom Area:256
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Master Bedroom Width:16
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Master Bedroom Length:16
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Bedroom 2 Area:224
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Bedroom 2 Length:16
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Bedroom 3 Length:14
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Bedroom 2 Width:14
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Bedroom 4 Length:12
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Bedroom 3 Area:238
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Bedroom 3 Width:17
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Bedroom 5 Length:15
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Bedroom 4 Area:216
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Bedroom 4 Width:18
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Bedroom 5 Area:225
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Bedroom 5 Width:15
Financial & Terms
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Listing Terms:Cash
Location
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Coordinates:-105.28963, 40.03968
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Latitude:40.03968
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Longitude:-105.28963
The Property
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Property Type:Residential
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Property Subtype:Residential-Detached
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Parcel Number:R0077871
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Lot Features:Lawn Sprinkler System
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Lot Size Acres:0.57
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Lot Size SqFt:24794
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Lot Size Area:24794
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Lot Size Units:Square Feet
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Zoning:SFR
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Possible Use:Single Family
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Exclusions:Staging furnishings.
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Horse:false
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Fencing:Fenced
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Other Structures:Workshop
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Water Source:City Water, City of Boulder
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Waterfront:false
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Road Frontage Type:City Street
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Road Surface Type:Paved
Listing Agent
- Contact info:
- No listing contact info available
Taxes
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Tax Year:2024
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Tax Annual Amount:28250
Beds
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Bedrooms Total:5
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Bedroom 2 Level:Main
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Bedroom 2 Features:Wood Floor
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Bedroom 3 Level:Main
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Bedroom 3 Features:Carpet
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Bedroom 4 Level:Main
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Bedroom 4 Features:Carpet
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Bedroom 5 Level:Basement
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Bedroom 5 Features:Carpet
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Master Bedroom Level:Main
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Master Bedroom Features:Carpet
Baths
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Total Baths:4
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Full Baths:3
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Half Baths:1
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Master Bath Features:Luxury Features Primary Bath, 5 Piece Primary Bath
The Listing
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Virtual Tour URL Unbranded:https://www.zillow.com/view-imx/7a5f37b6-fcae-4795-a761-4fdca9c766da?setAttribution=mls&wl=true&initialViewType=pano&utm_source=dashboard
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Special Listing Conditions:Private Owner
Heating & Cooling
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Heating:Forced Air
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Heating:true
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Cooling:Central Air
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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
Appliances
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Appliances:Gas Range/Oven
Schools
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Elementary School:Foothill
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Middle Or Junior 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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Subdivision Name:Foothills
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Association:false
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Spa:false
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Senior Community:false
Parking
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Garage:true
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Attached Garage:true
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Garage Type:Attached
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Garage Spaces:2
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Garage SqFt:650
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Covered Spaces:2
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Parking Features:Garage Door Opener
Monthly cost estimate

Asking price
$4,650,000
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. |
$24,899
|
Taxes | $2,354 |
Insurance | $1,278 |
Utilities | $228 See report |
Total | $28,759/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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4/2/25
Apr 2, 2025
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Price Changed | IRES | $4,650,000 | -2.1% |
2/28/25
Feb 28, 2025
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Listed / Active | IRES | $4,750,000 | 57.0% (9.5% / YR) |
2/20/19
Feb 20, 2019
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IRES | $3,025,000 | 5.2% |