503 Kalmia Avenue
Boulder, CO, 80304 $ 3,850,000
Bedrooms5 Baths3.1 Sq 5,381 Monthly Estimate*
$ 23,705
Listed by Open Real Estate
for $3,850,000 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.
Privately positioned on 0.57 acres behind a dramatic, illuminated gated driveway, this architecturally distinguished estate, renovated by Harvey Hine, reflects a refined mid-century modern aesthetic and offers a sophisticated balance of timeless design, privacy, and effortless livability. The main-floor primary suite offers a serene retreat with a generous walk-in closet and spa-inspired bath, allowing for luxurious single-level living. An oversized pivoting wood door provides an elegant introduction to the home. The living room features a vaulted ceiling, a statement tiled fireplace, and maple hardwood floors, while large windows and glass doors create a natural connection to the elevated rear deck, ideal for entertaining or quiet evenings at home. The chef's kitchen blends mid-century-inspired warmth with modern performance, featuring custom walnut cabinetry, a dramatic waterfall stone island, designer tile backsplash, walk-in pantry, Wolf range, and Sub-Zero refrigeration. A refined library lounge transitions to a flexible office or fifth bedroom with direct access to the front patio. The fully finished lower level includes a media lounge and private guest suite, with architectural renderings available to reimagine the space as a wellness retreat. Outdoors, the grounds unfold as a secluded oasis with towering 50-foot evergreens, natural boulders, a stone patio, a seasonal water feature, and multiple intimate seating areas. A heated bonus studio provides exceptional flexibility as a gym, art studio, or private office. With its scale, privacy, and layout, the property also presents compelling Sundance Film Festival 2027 rental potential. Ideally located on one of the most desirable streets in coveted Newlands, just minutes to downtown Boulder, open space, trails, shops, and schools. Explore the 3D tour and property video.
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FeaturesInteriorInterior Amenities Eat-in Kitchen Five Piece Bath Kitchen Island Open Floorplan Pantry Walk-In Closet(s)
Basement Partial Sump Pump
Flooring Tile
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
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 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 Newlands
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 Casey
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 Owner
Elementary School District Boulder Valley RE 2
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ExteriorVegetation Wooded
Fencing Fenced
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
- $23,705
- Monthly Property Taxes
- $2,354
- Monthly Home Insurance
- --
Default based on a 30-year fixed rate of 6.25% 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 $2,789,455
Percent of Sale Price 28%
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
1955678 Middle School
Boulder High School High School
Pricing History| Date | Price | Price Change | Description |
|---|
| 2/4/2026 | $3,850,000 | | Listed Price |