See Home Value
$3,438,500
● House - Off Market

503 Kalmia Ave

Boulder, CO 80304
bedrooms
4 Beds
bathrooms
3 Baths, 1 Half Bath
square feet
5,113 Ft²
$20,031
Est. Monthly

About This Property

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.
Unit Size
5,113 Ft²
Days on Market
-
Land Size
0.57 acres
Price per sqft
$704
Property Type
House
Property Taxes
$2,354
HOA Dues
-
Year Built
1978

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Last updated: 5 months ago (IRES MLS #IRE1050848)

Price History

Date / Event Date Event Price
May 26, 2026 Sold
Sold
Apr 30, 2026 In contract -
In contract
Mar 29, 2026 Price Decreased $3,600,000
↓ $200K (5.3%)
Price Decreased
Mar 7, 2026 Price Decreased $3,800,000
↓ $50K (1.3%)
Price Decreased
Feb 4, 2026 Listed $3,850,000
Listed
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Property Highlights

Garage
Air Conditioning
Fireplace

Building Info

Overview

    General

  • Year Built: 1978
  • Effective Year Built: 2005
  • Building Count: 2
  • Total Rooms: 11
  • Bedroom Count: 5
  • Bathroom Count: 4
  • Full Bathrooms: 3
  • Partial Bathrooms: 4
  • Building Condition: 1
  • Building Quality: 1
  • Construction Type: 6
  • Building Style: 11
  • Exterior Walls Type: 23
  • Interior Walls Type: 3
  • Roof Shape Type: 0
  • Roof Cover Type: 5
  • Floor Count: 100
  • Living Units: 1
  • Floor Cover: 0
  • Basement Type: 6
  • Basement Area: 2,052
  • Garage Type: 1
  • Garage Square Area: 650
  • Parking Space Count: 2
  • Patio Type: 0
  • Porch Type: 0
  • Pool Type: 0

    Dimensions

  • Lot Size Square Feet: 24,794
  • Total Building Area: 5,762
  • Gross Building Area: 5,762
  • Building Area: 4,844
  • Building Area Measurement: L

    Heating and Cooling

  • Air Conditioning: 1
  • Heating: 4
  • Heated Square Feet: 4,844
  • Heating Fuel Type: 0

    Utilities

  • Sewer System: 0
  • Water Service: 0

Building

  • Building Type: 0
  • Property Class: R
  • Subdivision: TR, NBR 128,158,172-178 FOOTHILLS
  • Land Acres: 0000000569
  • Standard Land Use Code: 1001
  • County Land Use Code: 1112
  • Legal Description 1: TRACT 349A 24-1N-71

Neighborhood

  • School District Name: Boulder Valley School District RE-2
  • Census Tract: 012101

Geography

  • Assessors Map Reference: B11-L
  • Account Number: R0077871
  • Subdivision Tract Number: 349A
  • Parcel: R0077871
  • Meridian: SEC 24 TWN 1N RNG 71
  • Municipality: BOULDER
  • Latitude: 40.0398
  • Longitude: -105.29

    Address

  • Full Address: 503 Kalmia Ave
  • Address - House Number: 503
  • Address - Street Name: Kalmia
  • Address - Suffix Type: Ave
  • State: CO
  • City Name: Boulder
  • Carrier Code: C039
  • 4-Digit Zip Code: 1733
  • Zip Code: 80304

Valuation

    Tax

  • Tax Year: 2022
  • Tax Amount: $2,071,880
  • Tax Rate Code Area: 00-010

    Appraisal Valuation

  • Standard Deviation: 0.1832
  • Valuation Date: May 17, 2023
  • Confidence Score: 76
  • Final Value: 4,228,574
  • High Value: 5,003,657
  • Low Value: 3,453,491

    Market Valuation

  • Market Total Value: $4,852,700
  • Market Land Value: $2,824,800
  • Market Improvement Value: $2,027,900

    Assessments Valuation

  • Assessed Year: 2023
  • Assessed Total Value: $328,285
  • Assessed Land Value: $191,098
  • Assessed Improvements Value: $137,187

    Sales

  • Current Sale Contract Date: Feb 14, 2019
  • Current Sale Recording Date: Feb 21, 2019
  • Current Sale Price:
  • Current Sale Document Type: 71
  • Current Sale Input Document Number: 3698747
  • Previous Sale Recording Date: Jul 11, 2018
  • Previous Sale Contract Date: Jul 09, 2018
  • Previous Sale Amount: $2,875,000
  • Previous Sale Document Type: 71
Data used for valuation calculations is provided by RealtyHop, and other third party sources

Comparables

Unit
Status
Type
Beds
Baths
ft²
Price/ft²
Asking Price
Listed On
Closing Price
Sold On
HOA + Taxes

About Central Boulder


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Frequently Asked Questions

When was property at 503 Kalmia built and last sold?
The property at 503 Kalmia was built in 1978 and last sold on Feb 14, 2019 for $3,025,000.
How much is this home worth?
The estimated value of the home located at 503 Kalmia is $0.
What are some comparable homes to 503 Kalmia?
There are currently no comparable homes to 503 Kalmia.