Boulder, CO 80302 512 Marine St

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Presented By: RE/MAX of Boulder; maureenm@boulderco.com,303-817-1282
  • MLS# 8483246
  • 09/30/2025
  • Request Tour
  • Request Info
  • Beds • 4
  • Full/Half Baths • 4 / 1
  • SQFT • 4,904
  • Garage • 2

Home Details

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.
Presented By: RE/MAX of Boulder; maureenm@boulderco.com,303-817-1282

Interior Features for 512 Marine St

Bedrooms

Bedroom 3 Area169
Bedroom 3 Length13
Bedroom 3 LevelUpper
Bedroom 3 Width13
Bedroom 4 Area156
Bedroom 4 Length12
Bedroom 4 LevelUpper
Bedroom 4 Width13
Primary Bedroom Area405
Primary Bedroom Length15
Primary Bedroom Width27
Primary on Main240
Second Bedroom Length16
Second Bedroom LevelBasement
Second Bedroom Width15
Total Bedrooms4

Bathrooms

3/4 Baths0
Half Baths1
Total Baths5

Kitchen

Kitchen Area250
Kitchen Length10
Kitchen LevelMain
Kitchen Width25

Other Interior Features

LivingAreaSourceAssessor
Above Grade Finished Area3238
Air Conditioning Y/NYes
BasementPartially Finished, Built-In Radon, Sump Pump
Below Grade Finished Area1666
Fireplace Features2+ Fireplaces, Living Room, Family/Recreation Room Fireplace, Primary Bedroom
Fireplace Y/NYes
Heating Y/NYes
Interior AmenitiesStudy Area, Eat-in Kitchen, Open Floorplan, Pantry, Walk-In Closet(s), Kitchen Island
Laundry FeaturesUpper Level
Window FeaturesWindow Coverings

Other Rooms

Dining Room Area13
Dining Room Area182
Dining Room LevelMain
Dining Room Width14
Family Room Area350
Family Room Length14
Family Room LevelMain
Family Room Width25
Kitchen Area250
Kitchen Length10
Kitchen LevelMain
Kitchen Width25
Living Room Area253
Living Room Length23
Living Room LevelMain
Living Room Width11

General for 512 Marine St

AccessibilityLevel Lot
AppliancesDouble Oven, Refrigerator, Washer, Dryer, Microwave
Architectural StyleVictorian
Attached Garage No
CityBoulder
Construction MaterialsWood/Frame, Brick/Brick Veneer
CoolingCentral Air
CountyBoulder
ElectricElectric
Elementary SchoolFlatirons
ExclusionsSeller's personal property.
Full Baths4
Garage Spaces2
Garage Y/NYes
HOANo
HeatingForced Air
High SchoolBoulder
High School DistrictBoulder Valley RE 2
Land Lease Y/NNo
LevelsTwo
Living Area UnitsSquare Feet
Lot Size Square Feet9947
Lot Size UnitsSquare Feet
MLS AreaBoulder
Middle/Junior High SchoolManhattan
New ConstructionNo
Patio/Porch FeaturesPatio
Primary Bedroom LevelUpper
Property Attached Y/NNo
Property ConditionNot New, Previously Owned
Property SubtypeResidential-Detached
Property TypeResidential
RoofComposition
Senior Community Y/NNo
SewerCity Sewer, Public Sewer
Standard StatusActive
StatusActive
Stories Count2
Subdivision NameHighland Lawn
Tax Annual Amount25584
Tax Year2024
UtilitiesElectricity Available, Cable Available
ViewMountain(s)
Year Built1903

Exterior for 512 Marine St

Building Area Total3238
Covered Spaces2
Exterior AmenitiesGas Grill, Balcony
Horse Y/NNo
Lot FeaturesLawn Sprinkler System, Wooded, Level
Lot Size Acres0.23
Lot Size Area9947
Road Surface TypePaved
SpaNo
Water SourceCity Water
Waterfront Y/NNo

Additional Details

Price History

Schools

Middle School Manhattan Middle School
Elementary School Flatirons Elementary School
High School Boulder High School

Jon Holsten

Price $4,750,000
MLS#8483246
List Date 09/30/2025
Property Type Single Family
Phone 970.237.2752
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Request Info
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