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Back 512 Marine St
Off Market

512 Marine St

Boulder CO 80302

4
5
2
4465 sq. ft.
0.23 ac.
Single-Family
Last sold for $4,650,000
Maureen McCarthyMaureen McCarthy, last sold this property on 21 November 2025 after 56 days on market.

Overview

Located on one of Boulder's most iconic, tree-lined streets, this architecturally rich residence effortlessly blends timeless charm with elevated modern design. Thoughtfully curated and beautifully finished, the main level features sustainably refinished hardwood floors, soaring ceilings, and a striking gourmet kitchen outfitted with a new Sub-Zero refrigerator, Wolf range, and a marble-topped island ideal for gatherings. Refined living and dining spaces exude warmth and character with custom built-ins, designer lighting, and multiple fireplaces.Upstairs, the vaulted primary suite offers a true retreat, complete with its own fireplace, a private balcony, and sweeping Flatiron views. Two additional bedrooms are filled with light and comfort, each enjoying access to a beautifully appointed bath-one en suite, the other just a few steps away. A whimsical "secret" bonus room adds charm and flexibility for imaginative play or clever storage.The lower level expands the living experience with impressive ceiling height, a bright media room, custom shelving, glass-enclosed home office, and a private guest suite with a spa-like bath.Outdoors, the magic continues. The professionally landscaped backyard is a lush and tranquil sanctuary with a newly paved patio, serene waterfall feature, plumbed-in BBQ, and multiple entertaining spaces-plus a storybook two-story playhouse with sandbox and a full sprinkler system for year-round vibrancy. A detached cottage with vaulted ceilings, a kitchenette, and powder room offers flexible bonus space-perfect for a gym, office, studio, guest quarters or teen hangout-while the detached garage boasts epoxy floors and built-in storage. Just moments from top cafes, award-winning restaurants, boutique shopping, Chautauqua Park, and endless hiking trails, this is quintessential Boulder living at its finest.

Features

4 bedrooms
5 bathrooms
2 carspaces
2 garage spaces
4465 sq. ft. floor area
0.23 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 512 Marine St is $1.55m.

Median value
$1.55m
Estimated value range
$500k - $5.5m
Median days on market
94
Estimated value trend
-13%
decrease 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 512 Marine St

2025
Sold
$4,650,000
21 Nov 2025 by Maureen McCarthy, of REMAX Of Boulder, Inc | Boulder
2019
Sold
$3,480,000
18 Jun 2019 by Stephen Remmert, of Compass - Boulder
2012
Sold
$2,250,000
29 Oct 2012 by R Tim Goodacre, of Goodacre & Company

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, 52 four-bedroom single-family properties similar to 512 Marine St, have been sold.

This represents a 1% decrease in four-bedroom single-family properties sales when compared to the previous 12 months.

Nearby agents

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Jennifer Crow

Sellers who recommend Jennifer Crow have praised them for being local expert, clear communication, responsive, supportive, patient, well-prepared, and empathetic

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Moriah Sullivan

Moriah Sullivan is a recommended agent for Boulder.  They have collected 1 local review across the last 12 months.

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John Mcelveen

John Mcelveen is a recommended agent for Boulder.  They have 7 local sales across the last 12 months.

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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)
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