512 Marine Street, Boulder, CO

$4,750,000

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4

Beds

5

Baths

4,465

Square feet

0.23

Acres

About 512 Marine Street

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 of 512 Marine Street

MLS® # IR1044486
Price $4,750,000
Bedrooms 4
Bathrooms 5.00
Full Baths 4
Half Baths 1
Square Footage 4,465
Acres 0.23
Year Built 1903
Type Residential
Sub-Type Single Family Residence
Style Victorian
Status Active

Community Information

Address 512 Marine Street
Subdivision Highland Lawn
City Boulder
County Boulder
State CO
Zip Code 80302

Amenities

Utilities Cable Available, Electricity Available, Natural Gas Available
Parking Spaces 2
# of Garages 2
View Mountain(s)
Is Waterfront No
Has Pool No

Interior

Interior Features Eat-in Kitchen, Kitchen Island, Open Floorplan, Pantry, Radon Mitigation System, Walk-In Closet(s)
Appliances Bar Fridge, Double Oven, Dryer, Microwave, Oven, Refrigerator, Washer
Heating Forced Air
Cooling Central Air
Fireplace Yes
Fireplaces Family Room, Gas, Living Room, Primary Bedroom
Stories Two

Exterior

Exterior Features Balcony, Gas Grill
Lot Description Level, Sprinklers In Front
Windows Window Coverings
Roof Composition

School Information

District Boulder Valley RE 2
Elementary Flatirons
Middle Manhattan
High Boulder

Additional Information

Date Listed September 25th, 2025
Zoning RES
Foreclosure No
Short Sale No
RE / Bank Owned No

Listing Details

OfficeRE/MAX of Boulder, Inc

Listing Map

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