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.
For sale
$4,985,000
512 Marine St, Boulder, CO 80302
4beds
4,904sqft
Est.:
Residential-Detached, Residential
Built in 1903
9,947 Square Feet Lot
$-- Zestimate®
$1,017/sqft
$-- HOA
What's special
- 58 days
- on Zillow |
- 940 |
- 49 |
Zillow last checked: 7 hours ago
Listing updated: June 24, 2025 at 03:45pm
Listed by:
Maureen McCarthy 303-817-1282,
RE/MAX of Boulder, Inc
Source: IRES,MLS#: 1036876

Travel times
Tour with a buyer's agent
Tour with a buyer's agent
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 5
- Full bathrooms: 4
- 1/2 bathrooms: 1
Primary bedroom
- Area: 405
- Dimensions: 15 x 27
Bedroom 2
- Area: 156
- Dimensions: 12 x 13
Bedroom 3
- Area: 169
- Dimensions: 13 x 13
Bedroom 4
- Area: 240
- Dimensions: 16 x 15
Dining room
- Area: 182
- Dimensions: 13 x 14
Family room
- Area: 350
- Dimensions: 14 x 25
Kitchen
- Area: 250
- Dimensions: 10 x 25
Living room
- Area: 253
- Dimensions: 23 x 11
Heating
- Forced Air
Cooling
- Has cooling: Yes
Appliances
- Included: Gas Range/Oven, Double Oven, Refrigerator, Bar Fridge, Washer, Dryer, Microwave, Water Purifier Owned
- Laundry: Washer/Dryer Hookups, Upper Level
Features
- Study Area, Eat-in Kitchen, Separate Dining Room, Open Floorplan, Pantry, Walk-In Closet(s), Kitchen Island, High Ceilings, Open Floor Plan, Walk-in Closet, 9ft+ Ceilings
- Flooring: Wood, Wood Floors, Tile
- Windows: Window Coverings, Wood Frames, Wood Windows
- Basement: Full,Partially Finished,Built-In Radon,Sump Pump
- Has fireplace: Yes
- Fireplace features: 2+ Fireplaces, Gas, Living Room, Family/Recreation Room Fireplace, Master Bedroom
Interior area
- Total structure area: 4,650
- Total interior livable area: 4,904 sqft
- Finished area above ground: 3,238
- Finished area below ground: 1,412
Video & virtual tour
Property
Parking
- Total spaces: 2
- Parking features: Garage
- Garage spaces: 2
- Details: Garage Type: Detached
Features
- Levels: Two
- Stories: 2
- Patio & porch: Patio
- Exterior features: Gas Grill, Balcony
- Fencing: Fenced
- Has view: Yes
- View description: Hills
Lot
- Size: 9,947 Square Feet
- Features: Curbs, Gutters, Sidewalks, Lawn Sprinkler System, Wooded, Level
Details
- Parcel number: R0000453
- Zoning: RES
- Special conditions: Private Owner
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Victorian
- Property subtype: Residential-Detached, Residential
Materials
- Wood/Frame, Brick
- Roof: Composition
Condition
- Not New, Previously Owned
- New construction: No
- Year built: 1903
Utilities & green energy
- Electric: Electric, Xcel Energy
- Gas: Natural Gas, Xcel Energy
- Sewer: City Sewer
- Water: City Water, City of Boulder
- Utilities for property: Natural Gas Available, Electricity Available, Cable Available
Community & HOA
Community
- Subdivision: Highland Lawn
HOA
- Has HOA: No
Location
- Region: Boulder
Financial & listing details
- Price per square foot: $1,017/sqft
- Tax assessed value: $4,399,900
- Annual tax amount: $25,584
- Date on market: 6/14/2025
- Listing terms: Cash,Conventional
- Electric utility on property: Yes
- Road surface type: Paved, Asphalt
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