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512 Marine StreetBoulder, CO 80302

For Sale

$4,985,000

Smart Buyer Rebate $49,850

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.

Listed by Maureen McCarthy

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License #IRP06093

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RE/MAX of Boulder, Inc

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303-817-1282

Last updated June 24, 2025

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Source: REcolorado #IR1036876

Listing Facts

  • TypeSingle-family
  • NeighborhoodFlatirons
  • Bedrooms4
  • Bathrooms5
  • Days on Prevu84
  • Taxes$25,584/year
  • Size4,465 sqft
  • Price per sqft$1,116

Amenities

  • Private Outdoor Space
  • Washer/Dryer
  • Air Conditioning
  • Parking

Location

Mortgage Calculator

Listing History

06/19/2025
Status changed to Active
$4,985,000
06/14/2025
Listed by RE/MAX of Boulder, Inc
$4,985,000

Property Details for 512 Marine Street

Exterior

Construction

  • Roof: Composition
  • Structure Type: House
  • Window Features: Window Coverings
  • Year Built: 1903
  • Architectural Style: Victorian
  • Construction Materials: Brick, Frame
  • Exterior Features: Balcony, Gas Grill

Features

  • Patio And Porch Features: Patio
  • Road Frontage Type: Public
  • View: Mountain(s)

Measurements

  • Building Area Total: 4,904
  • Lot Features: Level, Sprinklers In Front
  • Lot Size Acres: 0.23
  • Lot Size Square Feet: 9,947

Financial

Taxes

  • Parcel Number: R0000453
  • Tax Annual Amount: $25,584.00
  • Tax Year: 2024

Interior

Features

  • Appliances: Bar Fridge, Double Oven, Dryer, Microwave, Oven, Refrigerator, Washer
  • Fireplace Features: Family Room, Gas, Living Room, Primary Bedroom
  • Flooring: Tile, Wood
  • Interior Features: Eat-in Kitchen, Kitchen Island, Open Floorplan, Pantry, Radon Mitigation System, Walk-In Closet(s)

Measurements

  • Living Area: 4,465

Rooms

  • Basement: Full, Sump Pump
  • Has Basement: Yes
  • Bathrooms Full: 4
  • Bathrooms Half: 1
  • Bathrooms Total Integer: 5
  • Bedrooms Total: 4
  • Main Level Bathrooms: 1

Other

Location

  • Subdivision Name: Highland Lawn

Parking

Parking

  • Garage Spaces: 2
  • Parking Total: 2

Schools

Elementary School

  • Elementary School: Flatirons
  • Elementary School District: Boulder Valley RE 2

High School

  • High School: Boulder
  • High School District: Boulder Valley RE 2

Middle or Junior School

  • Middle Or Junior School: Manhattan

Utilities

Equipment

  • Cooling: Central Air
  • Heating: Forced Air
  • Laundry Features: In Unit
  • Sewer: Public Sewer
  • Utilities: Cable Available, Electricity Available, Natural Gas Available
  • Water Source: Public

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Full MLS Disclaimers

Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.