503 Kalmia Avenue
Boulder, CO, 80304 $ 3,900,000
Bedrooms5 Baths3.1 Sq 5,381 Monthly Estimate*
$ 24,331
Listed by Open Real Estate
for $3,900,000 with 5 bedrooms and 3 full baths, 1 half bath. This 5,381 square foot home was built in 1978 on a lot size of 0.57.
Behind a dramatic illuminated gate on a lush 0.57-acre lot, this architecturally refined residence was remodeled by renowned architect Harvey Hine and embodies the pinnacle of modern luxury and design. A striking wood exterior, standing seam metal roof, and grand slate patio set the tone for the sophisticated living experience within. Enter through an oversized pivoting wood door into a sun-drenched great room with soaring vaulted ceilings, a statement fireplace, and warm maple hardwood flooring. Walls of glass frame the open-concept living space, seamlessly connecting to an expansive rear deck-an entertainer's dream. The chef's kitchen features custom cabinetry, waterfall stone island, tile backsplash, walk-in pantry, a Wolf range, and a Sub-Zero refrigerator-offering both form and function in equal measure. A cozy library lounge leads to a versatile home office or fifth bedroom with direct access to the front patio. The main-level primary suite is a private retreat with a generous walk-in closet and a spa-inspired en suite bathroom. On the lower level, a fully finished space includes a media room, fitness area, and guest suite-perfect for everyday living or hosting visitors. The beautifully landscaped grounds are surrounded by 40-50' evergreens and enhanced by natural boulders, stone patios, a seasonal ditch, water feature, and multiple serene seating areas. A bonus heated studio offers flexible use as a gym, art studio, or private office. Additional highlights include an attached two-car garage, ample guest parking, and a show stopping gated driveway. Located in the coveted Newlands neighborhood with close proximity to North Boulder shops, downtown, open space, hiking trails, and top-rated schools, this extraordinary home offers the ultimate blend of luxury, privacy, and convenience. Be sure to view the virtual tour and listing video-this one is not to be missed.
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FeaturesInteriorInterior Amenities Eat-in Kitchen Five Piece Bath Kitchen Island Open Floorplan Pantry Vaulted Ceiling(s) Walk-In Closet(s)
Basement Full
Flooring Tile Wood
Fireplace Features Gas Living Room
Basement (Y/N) Y
Window Features Double Pane Windows Window Coverings
Above Grade Finished Area 3329
Half Baths 1
3/4 Baths 0
Laundry Features In Unit
Total Bedrooms 5
Below Grade Finished Area 1784
Main Level Bedrooms 4
Main Level Bathrooms 3
Total Baths 4
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GeneralSewer Public Sewer
Heating Forced Air
Cooling Ceiling Fan(s) Central Air
Utilities Electricity Available Internet Access (Wired) Natural Gas Available
Possession Closing/DOD
Roof Metal
Appliances Dishwasher Disposal Microwave Oven Refrigerator
Zoning SFR
Garage Spaces 2
Patio/Porch Features Deck Patio
Architectural Style Contemporary
Security Features Smoke Detector(s)
Construction Materials Frame
Exclusions Staging furnishings and personal items
Year Built 1978
Levels One
Property Subtype Single Family Residence
Tax Year 2024
Ownership Individual
County Boulder
Property Type Residential
HOA N
Attached Garage Y
Subdivision Name Foothills
Possible Use Residential
Full Baths 3
Status Active
High School Boulder
City Boulder
High School District Boulder Valley RE 2
Lot Size Square Feet 24794
Listing Terms 1031 Exchange Cash Conventional FHA VA Loan
Elementary School Foothill
Tax Annual Amount 28250
Middle/Junior High School Centennial
Concessions No
Virtual Tour https://www.zillow.com/view-imx/7a5f37b6-fcae-4795-a761-4fdca9c766da?setAttribution=mls&wl=true&initialViewType=pano&utm_source=dashboard
Structure Type House
Standard Status Active
Occupancy Type Vacant
Elementary School District Boulder Valley RE 2
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ExteriorVegetation Wooded
Parking Features Oversized RV Access/Parking
Lot Features Ditch Flood Zone Level Sprinklers In Front
Water Source Public
Total Parking 2
Building Area Total 5381
Lot Size Acres 0.57
Road Surface Type Paved
Road Frontage Type Public
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* Excluded FeaturesAffordability Calculator
- Monthly Principal & Interest
- $24,331
- Monthly Property Taxes
- $2,354
- Monthly Home Insurance
- --
Default based on a 30-year fixed rate of 6.375% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
Learn more about how to save NearbySingle family listings in Boulder, CO
Average List Price $2,678,899
Percent of Sale Price 31%
About Boulder, CO 102,151 Population
6% Since 2002
$ 65,436 Median Income
31.88 Median Age
18% Households with Children
Trends Information provided by ATTOM Data Solutions.
1955676 Elementary School
1955871 Middle School
Boulder High School High School
Pricing History| Date | Price | Price Change | Description |
|---|
| 10/2/2025 | $3,900,000 | -2.50% | Price Down |
| 8/12/2025 | $4,000,000 | -3.61% | Price Down |
| 7/23/2025 | $4,150,000 | | Listed Price |