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Back 503 Kalmia Ave
Off Market

503 Kalmia Ave

Boulder CO 80304

4
4
2
5113 sq. ft.
0.57 ac.
Single-Family
Last sold for $3,438,500
Sara GroemSara Groem, last sold this property on 26 May 2026 after 110 days on market.

Overview

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.

Features

4 bedrooms
4 bathrooms
2 carspaces
2 garage spaces
5113 sq. ft. floor area
0.57 ac. lot size
Single-Family

Estimated Value

Based on this property and similar 4 bedroom single-family properties sold in Boulder over the last 12 months, the estimated median property value of 503 Kalmia Ave is $1.83m.

Median value
$1.83m
Estimated value range
$675k - $7.72m
Median days on market
53
Estimated value trend
3%
increase over the last 12 months
Average days on market is based on recent, comparable sales in Boulder. It is only an indication of the time a property is actively listed and should not be relied upon as an accurate representation of how soon a property will be sold.

Property history for 503 Kalmia Ave

2026
Sold
$3,438,500
26 May 2026 by Sara Groem, of Open Real Estate
2019
Sold
$3,025,000
20 Feb 2019 by Jed MacArthur, of RE/MAX Of Boulder, Inc
2019
Sold
$3,025,000
20 Feb 2019 by Jed MacArthur, of REMAX Of Boulder, Inc | Boulder

Happy sellers in Boulder

~%

We have insufficient information to provide an overview of customer satisfaction for Boulder. Viewing the agent profiles, reviews and sales for Boulder can provide insights for this location.

Local market activity for 4 bedroom single-family properties in Boulder

In the last 12 months, 98 four-bedroom single-family properties similar to 503 Kalmia Ave, have been sold.

This represents a 16% decrease in four-bedroom single-family properties sales when compared to the previous 12 months.

Nearby agents

Compare and contact these top performing agents who’ve delivered exception customer service for their clients in Boulder

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David Scott

David Scott is a recommended agent for Boulder.  They have 2 local sales and collected 2 local reviews across the last 12 months.

  •   5   (4 reviews)
  •  2 Reviews in Boulder
  •  2 Sales in Boulder
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Ryan Davis

Sellers who recommend Ryan Davis have praised them for being local expert, clear communication, reliable, responsive, detail-oriented, supportive, and well-prepared

  •   5   (69 reviews)
  •  1 Review in Boulder
  •  1 Sale in Boulder
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John Mcelveen

John Mcelveen is a recommended agent for Boulder.  They have 5 local sales across the last 12 months.

  •  5 Sales in Boulder
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Anne Wells

Anne Wells is a recommended agent for Boulder.  They have 5 local sales across the last 12 months.

  •   4.8   (6 reviews)
  •  5 Sales in Boulder
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