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$3,600,000

  • For Sale
  • Under Contract
  • Single Family
  • 4 Beds
  • 3 Full Baths
  • 1 Partial Bath
  • 5,381 Sq. Ft.
  • 2 Car Garage
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Main-Level living at its finest! 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 & 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 & 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, & maple hardwood floors, while large windows & 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, & 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. Enjoy year-round peace of mind with a whole-house generator, providing backup power! Outdoors, the grounds unfold as a secluded oasis with towering 50-foot evergreens, natural boulders, a stone patio, a seasonal water feature, & multiple intimate seating areas. A heated bonus studio provides exceptional flexibility as a gym, art studio, or private office. With its scale, privacy, & 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, & schools. Explore the 3D tour and property video.

Full Property Details for 503 Kalmia Ave

General

  • Price: $3,600,000
  • Taxes: $28,250 (2024)
  • Status: Under Contract
  • Type: Single Family
  • Source: IRES
  • MLS ID: 1050848
  • Updated: 4/28/2026
  • Added to Site: 108 day(s) ago

Interior

  • Interior Features: Eat-In Kitchen, Separate Dining Room, Open Floorplan, Workshop, Pantry, Wood Windows, Walk-In Closet(s), Kitchen Island
  • Fireplace: Yes
  • Fireplace(s): Gas, Living Room
  • Appliances: Gas Range, Dishwasher, Refrigerator, Microwave, Disposal, Fire Alarm

Rooms

Bathrooms

  • Total Bathrooms: 4
  • Full Bathrooms: 3
  • Half Bathrooms: 1
  • Main Floor Baths: 2
  • Basement Baths: 1

Bedrooms

  • Total Bedrooms: 4

Additional Information

  • Security/Safety: Security System

Exterior

  • Exterior Features: Sprinkler System, Oversized Garage
  • Porch/Patio/Deck: Patio, Deck

Parking

  • Garage: Yes
  • Attached garage: Yes
  • Garage Spaces: 2
  • Parking Features: Garage Door Opener, RV Access/Parking, Attached
  • Garage Description: Attached

Location

  • Area: Boulder
  • County: Boulder
  • Subdivision: Newlands

School Information

  • School District: Boulder Valley Dist RE2
  • Elementary School: Foothill
  • Middle School: Casey
  • High School: Boulder

Heating & Cooling

  • Cooling Type: Central Air, Ceiling Fan(s)
  • Heating Type: Forced Air

Utilities

  • Gas: Yes
  • Gas: Xcel
  • Sewer: Public Sewer
  • Water: City
  • Utility Description: Natural Gas Available, Electricity Available

Structural Information

  • Architectural Style: Contemporary
  • Construction: Frame
  • Exterior Const.: Frame
  • Basement: Yes
  • Basement Desc.: Partial, Partially Finished, Sump Pump
  • Roof: Metal
  • Windows: Window Coverings
  • Square Feet: 5,381
  • Sq. Ft. Source: Other
  • Living Area: 5,113 Sq. Ft.
  • Year Built: 1978

Additional Structures

  • Other Structures: Storage

Lot Features

  • Lot Size (Acres): 0.57
  • Lot Size (Sq. Ft.): 24,794
  • Frontage: City Street
  • Street/Road Desc.: Asphalt
  • Fence: Yes
  • Lot Features: Evergreen Trees, Deciduous Trees, Level, Abuts Ditch, City Limits, Paved
  • Potential Use: Single-Family
  • Zoning: SFR
  • Fencing (Description): Fenced, Wood

Green Features

  • Energy Efficient: Windows

Financial Considerations

  • Tax Amount: $28,250
  • Tax Year: 2024
  • Terms: Cash, Conventional, FHA, VA, 1031 Exchange

Disclosures and Reports

  • Special Conditions: Private Owner
  • Exclusions: Staging furnishings and personal items
  • Property ID: R0077871

Listed by Open Real Estate (303) 232-1111

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Listing agent

— 503 Kalmia Ave —

  • Open Real Estate

    303-232-1111

3035224184

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 503 Kalmia Ave

School District:Boulder Valley School District Re-2
NameGradesDistance
Foothill Elementary School
1001 Hawthorn Avenue, Boulder, CO 80304
K-50.4 mi
Centennial Middle School, Boulder, CO
2205 Norwood Avenue, Boulder, CO 80304
6-81.1 mi
Boulder High School
1604 Arapahoe Avenue, Boulder, CO 80302
9-122 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 503 Kalmia Ave Get Price Alerts and Save Property

Date
Details
Price
Change
Source
3/27/2026
Price Reduced
$3,600,000
-5.26%
MLS
3/04/2026
Price Reduced
$3,800,000
-1.3%
MLS
2/04/2026
Listed
$3,850,000
27.27%
MLS
2/14/2019
Sold
$3,025,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 503 Kalmia Ave

Year
Property Taxes
Change
Tax Assessment
Change
2025
$27,650
-2%
$289,982
-10%
2024
$28,250
2%
$321,446
-1%
2023
$27,760
41%
$325,131
42%
2021
$19,757
-5%
$229,529
3%
2022
$20,719
5%
$223,109
9%
2021
$19,757
12%
$205,563
—
2019
$17,619
11%
$205,563
12%
2018
$15,843
3%
$182,736
—
2017
$15,347
2%
$182,736
5%
2016
$15,063
6%
$174,005
—
2015
$14,264
23%
$174,005
29%
2014
$11,634
2%
$135,320
—
2013
$11,378
—
$135,320
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Estimate the Cost for 503 Kalmia Ave

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*These costs are estimates, and the interest rates assume exceptional credit standing.

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NMLS#: 1598647

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Listed by Open Real Estate (303) 232-1111

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503 Kalmia Ave, Boulder, CO 80304 (MLS# 1050848) is a Single Family property with 4 bedrooms, 3 full bathrooms and 1 partial bathroom. 503 Kalmia Ave is currently listed for $3,600,000 and was received on February 04, 2026. Want to learn more about 503 Kalmia Ave? Do you have questions about finding other Single Family real estate for sale in Boulder? You can browse all Boulder real estate or contact a Coldwell Banker agent to request more information.

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