623 Marine St, Boulder, CO 80302
Property image
Property image
SOLD
JUL 8, 2026

623 Marine St
Boulder, CO 80302

Flatirons
  • 4 Beds
  • 2.5 Baths
  • 2,659 sqft

$1,176,000

Last Sold: Jul 8, 2026
2% below list $1.2M
$442/sqft
Est. Refi. Payment $6,565/mo*
Refinance Your Home

$1,176,000

Last Sold: Jul 8, 2026
2% below list $1.2M
$442/sqft
Est. Refi. Payment $6,565/mo*
Refinance Your Home
4 Beds
2.5 Baths
2,659 sqft

Home Value

Trulia Estimate
$1.17M
Since last month
Decreased$28K (-2.4%)
Since last year
Decreased$241K (-17.1%)
Since last sale
Decreased$5K (-0.4%)
Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value increased by +24% in the last 10 years
MonthEstimated value
2026
August 2026$1.17M
July 2026$1.2M
June 2026$1.16M
May 2026$1.17M
April 2026$1.16M
March 2026$1.58M
February 2026$1.42M
January 2026$1.37M
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.
Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
1625 4th St, Boulder, CO
0.28
Single-Family Home
$1,411,000
02/20/26
4
2
1,897
1321 9th St #A, Boulder, CO
0.26
Single-Family Home
$2,295,000
08/03/26
4
3
2,936
580 Pleasant St, Boulder, CO
0.19
Single-Family Home
$2,350,000
11/19/25
3
2.5
2,655
465 Marine St, Boulder, CO
0.18
Single-Family Home
$2,350,000
05/28/26
4
4
3,501
610 University Ave, Boulder, CO
0.13
Single-Family Home
$1,802,500
05/04/26
5
3
3,008
1128 Lincoln Pl, Boulder, CO
0.41
Single-Family Home
$1,300,000
05/01/26
4
3
1,476
780 College Ave, Boulder, CO
0.35
Single-Family Home
$2,100,000
05/27/26
4
3.5
3,075
990 Grandview Ave, Boulder, CO
0.34
Single-Family Home
$1,100,000
08/14/26
2
2
2,955
1020 10th St, Boulder, CO
0.56
Single-Family Home
$1,510,000
11/07/25
4
3
2,972

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.
Address
Distance
Price
Bed
Bath
Sqft
Status
611 Marine St, Boulder, CO 80302
0.02
$2,192,700
4
2
2,122
Off Market
1635 6th St, Boulder, CO 80302
0.06
$1,549,100
3
3
1,968
Off Market
600 Arapahoe Ave #1, Boulder, CO 80302
0.07
$608,100
3
1.5
917
Off Market
636 Marine St, Boulder, CO 80302
0.04
$1,995,000
6
4
3,201
Recently Sold
635 Arapahoe Ave, Boulder, CO 80302
0.08
$3,870,000
4
4.5
5,604
Off Market
512 Marine St, Boulder, CO 80302
0.13
$4,650,000
4
4.5
5,048
For Sale
541 Arapahoe Ave, Boulder, CO 80302
0.13
$2,495,000
5
4
4,069
For Sale
504 Marine St, Boulder, CO 80302
0.14
$4,978,300
4
4
4,492
Off Market
531 Arapahoe Ave, Boulder, CO 80302
0.14
$1,789,000
4
4
2,583
Off Market
610 University Ave, Boulder, CO 80302
0.13
$1,802,500
5
3
3,008
Recently Sold
632 University Ave, Boulder, CO 80302
0.12
$1,679,000
3
2
1,722
Off Market

Local Information

  • Map ViewExplore the area around 623 Marine St.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Year Built
1984
Living Area
2,659 sqft
Price/Sqft
$442/sqft
Parking
None

About this House

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.
623 Marine St, Boulder, CO 80302 is a 4 bedroom, 3 bathroom, 2,659 sqft single-family home in Flatirons, built in 1984. It last sold for $1,176,000 on Jul 8, 2026 (2% below the $1,199,000 asking price). More recently, it was listed as a rental in July 2026 with an asking price of $4,800 per month. That rental listing was removed on August 13, 2026. It is currently off market. The Trulia Estimate is $1,172,200, with a rent estimate of $5,288/month.
Last check for updates: 43 minutes ago
Listed by Zack Scott, (720) 526-2891
Homestead Real Estate, LLC
Bought with: Francis Lanzano, (720) 891-8283, The Agency - Denver
Source: IRES as distributed by MLS GRID, MLS#1054075

Home Details for 623 Marine St

Interior Features

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

Exterior Features

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 Feet

Property Information

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

Price & Status

Price
List Price: $1,199,000Price Per Sqft: $442/sqft

Active Status

MLS Status: Sold

Location

Direction & Address
City: BoulderCommunity: Aquamarine
School Information
Elementary School: FlatironsJr High / Middle School: ManhattanHigh School: BoulderHigh School District: Boulder Valley Dist RE2

Building

Building Area
Building Area: 1696 Square Feet

HOA

Has an HOA

Lot Information

Lot Area: 4322 sqft

Listing Info

Special Conditions: Private Owner

Offer

Listing Terms: Cash, Conventional, VA Loan, 1031 Exchange

Energy

Energy Efficiency Features: Windows

Miscellaneous

BasementMls Number: 1054075Attribution Contact: 720-526-2891Above Grade Unfinished Area: 1696Activation Date: Fri Mar 20 2026Showing Service Name: ShowingTime

Price and Tax history

DateEventPrice
Aug 13, 2026
Source: Zillow Rentals
ListingRemoved
$3,995
Aug 8, 2026
Source: Zillow Rentals
PriceChange
$3,995
Price decreased by 9%
Aug 1, 2026
Source: Zillow Rentals
PriceChange
$4,380
Price decreased by 9%
Jul 22, 2026
Source: Zillow Rentals
Listed For Rent
$4,800
Jul 17, 2026
Source: Zillow Rentals
ListingRemoved
$4,800

Market trends in Boulder

Last updated July 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$897K
$10.37KMoM
Sale-to-List Price
98.4%
0.1%MoM
Price per sq ft
$499
$4MoM
Available listings
760
19MoM

Around this home

Neighborhood Overview

Flatirons
See Local Highlights
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.
  • Nancypautsch
    "This is a dog friendly neighborhood. Several neighbors have dogs that they walk which is fun to see. We don’t presently have dogs, but we always had one to two dogs with our three kids as they were growing up. Pets definitely are park of a neighborhood community. "
    0
    Flag
  • Meganelizabethfettig
    "It’s close to the creek the park and roads that go up mountain roads but I don’t like hearing the traffics from Canyon. It also feels claustrophobic to me but I’m a mountain girl."
    1
    Flag

LGBTQ Local Legal Protections

Based on information submitted to the MLS GRID as of 2026-08-23 10:53:08 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

Frequently asked questions about 623 Marine St

  • What is 623 Marine St estimated to be worth?
    Trulia's estimated value for 623 Marine St in Boulder, CO is $1,172,200.
  • What is the price history for 623 Marine St?
    623 Marine St in Boulder, CO last sold for $1,176,000 in July 2026.
  • Is Boulder a buyer's or seller's market?
    Boulder is currently a balanced market, based on recent for-sale activity.
  • What's the median sale price in Boulder?
    The median sale price in Boulder is $897K. That is up $10.37K from the prior month.
  • Does 623 Marine St have laundry facilities?
    Yes, 623 Marine St in Boulder, CO has laundry facilities.
  • Does 623 Marine St have a yard?
    Yes, 623 Marine St in Boulder, CO has a yard.

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