623 Marine St
Boulder, CO 80302
Flatirons
4 Beds
2.5 Baths
2,659 sqft
4 Beds
2.5 Baths
2,659 sqft
We estimate this home will sell faster than 84% nearby.
Local Information
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Description
Perfectly situated in Boulder, Colorado this home offers a great opportunity. With two dedicated parking spots off of Turner Alley, parking is always available and convenient. Tucked along Marine Street in one of Boulder's most sought-after neighborhoods, home offers great walkability, proximity to the University of Colorado and great investment potential. Boulder is now home to the Sundance Film Festival adding to the many perks and attractive qualities of living here. From the front door, take an easy stroll to Boulder Creek or head downtown to the infamous Pearl Street walking mall to enjoy world class dining, entertainment and night life. Just up the street, is access to Viewpoint Trail which leads to a wild expanse of City/County open space with various types of Front Range wildlife, trails and other recreational opportunities. Take a trip along Boulder creek and into the mountains on the Boulder Creek Path. Among the many options from this location, it's a quick trip up Boulder Canyon to Nederland and Eldora Ski Resort. This property is positioned to enjoy both the outdoors and the energy of downtown living. Step inside and experience a wealth natural light and amazing views of the Flatirons, creating a warm, inspiring and captivating feel throughout. The layout is comfortable and practical, whether you're planning to make it your own down the road or continue its proven use as a rental. The property has been rented successfully for years and is currently leased through July, offering immediate income for the next owner. With 2 bedrooms upstairs and 2 bedrooms on the lower level, the home is spatially beneficial for privacy and a multitude of living situations. Outside, a private fenced yard provides a quiet space to relax or entertain and the elevated deck showcases the beautiful views and proximity to the Flatirons and foothills. The walk out basement provides a separate entrance and the potential for a variety of uses.
We estimate this home will sell faster than 84% nearby.
Home Highlights
Parking
None
Outdoor
Deck
A/C
Heating only
HOA
None
Price/Sqft
$451
Listed
63 days ago
Home Details for 623 Marine St
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Interior Details Basement: Full,Partially Finished,Walk-Out AccessNumber of Rooms: 7Types of Rooms: Primary Bedroom, Bedroom 2, Bedroom 3, Bedroom 4, Dining Room, Kitchen, Living Room |
Beds & Baths Number of Bedrooms: 4Number of Bathrooms: 3Number of Bathrooms (full): 2Number of Bathrooms (half): 1Number of Bathrooms (main level): 1 |
Dimensions and Layout Living Area: 2659 Square Feet |
Appliances & Utilities Utilities: Natural Gas Available, Electricity AvailableAppliances: Gas Range, Dishwasher, Refrigerator, DisposalDishwasherDisposalLaundry: Washer/Dryer HookupRefrigerator |
Heating & Cooling Heating: Hot Water,BaseboardHas HeatingHeating Fuel: Hot Water |
Fireplace & Spa Fireplace: Living RoomHas a Fireplace |
Gas & Electric Has Electric on Property |
Windows, Doors, Floors & Walls Window: Window CoveringsFlooring: Wood |
Levels, Entrance, & Accessibility Stories: 2Levels: TwoAccessibility: Level Lot, Near BusFloors: Wood |
View Has a ViewView: Hills |
Security Security: Fire Alarm |
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Exterior Home Features Roof: CompositionPatio / Porch: DeckFencing: Fenced, Wood |
Parking & Garage Other Parking: NoneNo CarportNo GarageNo Attached GarageParking: None |
Frontage Road Frontage: City Street, AlleyRoad Surface Type: ConcreteNot on Waterfront |
Water & Sewer Sewer: Public Sewer |
Farm & Range Does Not Include Irrigation Water Rights |
Finished Area Finished Area (above surface): 1696 Square FeetFinished Area (below surface): 921 Square Feet |
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Days on Market: 63 |
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Year Built Year Built: 1984 |
Property Type / Style Property Type: ResidentialProperty Subtype: Single Family Residence |
Building Construction Materials: Frame, CompositionNot a New ConstructionNot Attached Property |
Property Information Usage of Home: Single FamilyNot Included in Sale: Tenants personal propertyParcel Number: R0095516 |
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Price List Price: $1,199,000Price Per Sqft: $451 |
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MLS Status: Active |
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Direction & Address City: BoulderCommunity: Aquamarine |
School Information Elementary School: FlatironsJr High / Middle School: ManhattanHigh School: BoulderHigh School District: Boulder Valley Dist RE2 |
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Listing Agent Listing ID: 1054075 |
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Building Area Building Area: 2617 Square Feet |
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No HOA |
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Lot Area: 4322 sqft |
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Special Conditions: Private Owner |
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Listing Terms: Cash, Conventional, VA Loan, 1031 Exchange |
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Energy Efficiency Features: Windows |
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BasementMls Number: 1054075Attribution Contact: 720-526-2891Above Grade Unfinished Area: 1696Activation Date: Fri Mar 20 2026Showing Service Name: ShowingTime |
Last check for updates: about 4 hours ago
Listing courtesy of Zack Scott, (720) 526-2891
Homestead Real Estate, LLC
Source: IRES as distributed by MLS GRID, MLS#1054075
Price History for 623 Marine St
| Date | Price | Event | Source |
|---|---|---|---|
| 04/16/2026 | $1,199,000 | PriceChange | IRES as distributed by MLS GRID #1054075 |
| 03/20/2026 | $1,590,000 | Listed For Sale | IRES as distributed by MLS GRID #1054075 |
| 04/06/2012 | $551,400 | Sold | IRES as distributed by MLS GRID #669643 |
| 12/07/2011 | $585,000 | PriceChange | Agent Provided |
| 09/28/2011 | $597,420 | PriceChange | Agent Provided |
| 09/14/2011 | $628,600 | PriceChange | Agent Provided |
| 07/29/2011 | $647,500 | Listed For Sale | Agent Provided |
| 07/03/2010 | $698,000 | ListingRemoved | Agent Provided |
| 08/16/2009 | $698,000 | PriceChange | Agent Provided |
| 06/09/2009 | $715,000 | Listed For Sale | Agent Provided |
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Property Tax and Assessment
| Year | 2025 |
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| Tax | $8,832 |
| Assessment | $1,548,700 |
Home facts updated by county records
Comparable Sales for 623 Marine St
Address | Distance | Property Type | Sold Price | Sold Date | Bed | Bath | Sqft |
|---|---|---|---|---|---|---|---|
0.06 | Single-Family Home | $1,575,000 | 07/25/25 | 3 | 3 | 1,968 | |
0.28 | Single-Family Home | $1,411,000 | 02/20/26 | 4 | 2 | 1,897 | |
0.19 | Single-Family Home | $1,311,000 | 07/31/25 | 4 | 2 | 2,624 | |
0.20 | Single-Family Home | $2,350,000 | 11/19/25 | 3 | 2.5 | 2,655 | |
0.13 | Single-Family Home | $1,802,500 | 05/04/26 | 5 | 3 | 3,008 | |
0.14 | Single-Family Home | $1,815,675 | 08/12/25 | 4 | 4 | 2,583 | |
0.41 | Single-Family Home | $1,300,000 | 05/01/26 | 4 | 3 | 1,476 | |
0.30 | Single-Family Home | $1,400,000 | 08/04/25 | 2 | 2.5 | 1,788 | |
0.56 | Single-Family Home | $1,510,000 | 11/07/25 | 4 | 3 | 2,972 | |
0.53 | Single-Family Home | $1,608,120 | 05/13/26 | 4 | 2.5 | 3,169 |
Assigned Schools
These are the assigned schools for 623 Marine St.
- Boulder High School
- 9-12
- Public
- 2074 Students
10/10GreatSchools RatingParent Rating AverageTerrible experience here. Constantly made fun of and picked on by students and teachers treated me like a total idiot. Went from being respected by peers and teachers at my old school to ridiculed and laughed at by the entire class.Other Review3mo ago - Manhattan Middle School Of The Arts And Academics
- 6-8
- Public
- 400 Students
5/10GreatSchools RatingParent Rating AverageThis is our first year at Manhattan and we are incredibly pleased with the middle school experience our son is having. When we first moved to the neighborhood (when the school was under old leadership) we were warned to look elsewhere because of some institutional issues. By the time enrollment came around last year, the new principal had infused the school with incredible energy and he was adamant it was his top choice. It feels like a vibrant place where the whole community is striving to improve and make it the best three years possible for every kid there. The principal shared that test scores showed 22% growth last year, which is pretty mind-blowing! I'm always a fan of a place that is focused on growth and improvement rather than one that's resting on its reputation and we've definitely found that at Manhattan.Parent Review6mo ago - Flatirons Elementary School
- K-5
- Public
- 182 Students
6/10GreatSchools RatingParent Rating AverageWe love Flatirons! They offer excellent programs for kids of all abilities, and I’ve been especially impressed by the diversity of what they provide, such as guest speakers, STEAM programs, community involvement, and extracurricular opportunities. The teachers are incredibly supportive and genuinely care about the wellbeing and growth of their students.Because it’s a smaller school, students receive much more individualized attention, which has made a big difference for our family.Parent Review5mo ago 
Check out schools near 623 Marine St.
Neighborhood Overview
Neighborhood stats provided by third party data sources.
What Locals Say about Flatirons
At least 4 Trulia users voted on each feature.
100 % Say it's walkable to restaurants
100 % Say parking is easy
89 % Say it's dog friendly
86 % Say there's holiday spirit
86 % Say people would walk alone at night
83 % Say it's walkable to grocery stores
80 % Say it's quiet
80 % Say yards are well-kept
75 % Say there are sidewalks
75 % Say streets are well-lit
71 % Say they plan to stay for at least 5 years
63 % Say there's wildlife
61 % Say neighbors are friendly
57 % Say kids play outside
50 % Say car is needed
50 % Say there are community events
Sourced by Trulia users. Learn more about our methodology.
LGBTQ Local Legal Protections
LGBTQ Local Legal Protections
Zack Scott, Homestead Real Estate, LLC
Agent Phone: (720) 526-2891
Based on information submitted to the MLS GRID as of 2026-05-20 21:43:09 PDT. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information. Some IDX listings have been excluded from this website. Click here for more information
623 Marine St, Boulder, CO 80302 is a 4 bedroom, 3 bathroom, 2,659 sqft single-family home built in 1984. 623 Marine St is located in Flatirons, Boulder. This property is currently available for sale and was listed by IRES as distributed by MLS GRID on Mar 18, 2026. The MLS # for this home is MLS# 1054075.