450 S 40th Street, Boulder, CO 80305
Property image
Property image
SOLD
FEB 20, 2026

450 S 40th Street
Boulder, CO 80305

Martin Acres
  • 5 Beds
  • 3 Baths
  • 2,800 sqft

$975,000

Last Sold: Feb 20, 2026
5% below list $1.02M
$348/sqft
Est. Refi. Payment $5,513/mo*
Refinance Your Home

$975,000

Last Sold: Feb 20, 2026
5% below list $1.02M
$348/sqft
Est. Refi. Payment $5,513/mo*
Refinance Your Home
5 Beds
3 Baths
2,800 sqft

Local Information

  • Map ViewExplore the area around 450 S 40th Street.
  • Schools1 Preschool School1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Year Built
1956
Living Area
2,800 sqft
Price/Sqft
$348/sqft
Parking
1 Car Garage

About this House

Martin Acres gem with Flatiron views! Love where you live in this ideally located Martin Acres home where the Flatirons steal the show and convenience is second to none. Step inside and find an easy open flow between the living, dining, and kitchen areas. A rare wood-burning fireplace adds warmth and character while the bay window in the dining room perfectly frames those iconic mountain views. The kitchen shines with newer appliances and a stylish backsplash, ideal for casual mornings or entertaining friends. On the main level you will find three comfortable bedrooms, including a primary suite enhanced with updated lighting and a private bathroom. Downstairs, the spacious finished basement is a true bonus for movie nights, a game room, or space for guests. The second wood-burning fireplace adds cozy charm while two additional non-conforming bedrooms expand your options for a home office or studio. Recent updates include new gutters and a new basement escape window about three years old, offering peace of mind. Outside, a mature tree provides a shady retreat in the private backyard, perfect for quiet afternoons or casual gatherings. You will love the ease of getting around with Table Mesa shopping, dining, and transit just minutes away and a lovely neighborhood park an easy stroll from your front door. This is a rare opportunity in sought-after Martin Acres, a home with great bones, an unbeatable location, and that easy South Boulder lifestyle everyone is after. Experience the views, embrace the lifestyle, and make this Martin Acres gem your own!
450 S 40th Street, Boulder, CO 80305 is a 5 bedroom, 3 bathroom, 2,800 sqft single-family home in Martin Acres, built in 1956. It last sold for $975,000 on Feb 20, 2026 (5% below the $1,025,000 asking price). It is currently off market. The Trulia Estimate is $961,700, with a rent estimate of $4,285/month.

Home Details for 450 S 40th Street

Interior Features

Interior Details
Basement: Bath/Stubbed,Exterior Entry,Finished,Interior EntryNumber of Rooms: 13Types of Rooms: Bedroom, Bathroom, Dining Room, Kitchen, Laundry, Living Room
Beds & Baths
Number of Bedrooms: 5Main Level Bedrooms: 3Number of Bathrooms: 3Number of Bathrooms (full): 2Number of Bathrooms (three quarters): 1Number of Bathrooms (main level): 2
Dimensions and Layout
Living Area: 2800 Square Feet
Appliances & Utilities
Utilities: Cable Available, Electricity Connected, Internet Access (Wired), Natural Gas Connected, Phone AvailableAppliances: Dishwasher, Dryer, Microwave, Oven, Refrigerator, WasherDishwasherDryerMicrowaveRefrigeratorWasher
Heating & Cooling
Heating: Forced Air,Natural GasHas CoolingAir Conditioning: Central AirHas HeatingHeating Fuel: Forced Air
Fireplace & Spa
Number of Fireplaces: 2Fireplace: Basement, Living RoomHas a Fireplace
Gas & Electric
Has Electric on Property
Windows, Doors, Floors & Walls
Window: Bay Window(s), Double Pane Windows, Window CoveringsFlooring: Carpet, Tile, WoodCommon Walls: No Common Walls
Levels, Entrance, & Accessibility
Stories: 1Levels: OneFloors: Carpet, Tile, Wood
View
Has a ViewView: Mountain(s)
Security
Security: Carbon Monoxide Detector(s), Radon Detector, Smoke Detector(s), Video Doorbell

Exterior Features

Exterior Home Features
Roof: CompositionPatio / Porch: PatioExterior: Private Yard, Rain Gutters
Parking & Garage
Number of Garage Spaces: 1Number of Covered Spaces: 1Other Parking: Off Street Spaces: 1No CarportHas a GarageHas an Attached GarageParking Spaces: 2Parking: Exterior Access Door,Lighted,Storage
Frontage
Not on Waterfront
Water & Sewer
Sewer: Public Sewer
Farm & Range
Not Allowed to Raise Horses
Finished Area
Finished Area (above surface): 1400 Square FeetFinished Area (below surface): 1260 Square Feet

Property Information

Year Built
Year Built: 1956
Property Type / Style
Property Type: ResidentialProperty Subtype: Single Family ResidenceStructure Type: HouseArchitecture: House
Building
Construction Materials: Brick, Wood SidingNot Attached Property
Property Information
Not Included in Sale: NoneParcel Number: R0009548

Price & Status

Price
List Price: $1,025,000Price Per Sqft: $348/sqft
Status Change & Dates
Off Market Date: Fri Jan 16 2026Possession Timing: Close Of Escrow

Active Status

MLS Status: Closed

Location

Direction & Address
City: BoulderCommunity: Martin Acres
School Information
Elementary School: CreeksideElementary School District: Boulder Valley RE 2Jr High / Middle School: ManhattanJr High / Middle School District: Boulder Valley RE 2High School: FairviewHigh School District: Boulder Valley RE 2

Building

Building Area
Building Area: 2800 Square Feet

Community

Not Senior Community

HOA

No HOA

Lot Information

Lot Area: 6913 sqft

Listing Info

Special Conditions: Standard

Offer

Contingencies: None KnownListing Terms: Cash, Conventional, FHA, VA Loan

Energy

Energy Efficiency Features: Thermostat

Mobile R/V

Mobile Home Park
Mobile Home Units: Feet

Business

Business Information
Ownership: Corporation/Trust

Miscellaneous

BasementMls Number: 4297182Attribution Contact: Lex.Campaldini@redfin.com, 720-660-9491Above Grade Unfinished Area: 1400Below Grade Unfinished Area: 140Showing Service Name: Showing Time
Last check for updates: about 2 hours ago
Listed by Lex Campaldini, (720) 660-9491
Redfin Corporation
James Ayala, (303) 875-1536
Redfin Corporation
Bought with: Tavia Galvin, (720) 280-2269, RE/MAX Alliance - Olde Town
Co-Buyer's Agent: Nicki Thompson, (303) 725-1874, RE/MAX Alliance - Olde Town
Source: REcolorado as distributed by MLS GRID, MLS#4297182

Price History for 450 S 40th Street

DatePriceEventSource
02/20/2026$975,000Sold
REcolorado as distributed by MLS GRID #4297182
01/16/2026$1,025,000PendingREcolorado as distributed by MLS GRID #4297182
11/06/2025$1,025,000Listed For SaleREcolorado as distributed by MLS GRID #4297182
11/19/2021$967,500Sold
IRES as distributed by MLS GRID #953485
10/19/2021$949,500Listed For SaleIRES as distributed by MLS GRID #953485
06/15/2017$735,000Sold
N/A
05/10/2017$745,000PendingAgent Provided
05/04/2017$745,000Listed For SaleAgent Provided
05/17/2010$470,000Sold
N/A
04/02/2010$479,000PriceChange
Agent Provided
02/20/2010$493,000Listed For SaleAgent Provided
07/19/2009$429,000ListingRemovedAgent Provided
09/27/2008$429,000Listed For SaleAgent Provided

Market trends in Boulder

Last updated June 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$891K
$60.83KMoM
Sale-to-List Price
98.2%
0.4%MoM
Price per sq ft
$503
$2MoM
Available listings
778
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Property Tax and Assessment

Year2025
Tax$6,496
Assessment$1,074,600
Home facts updated by county records

Comparable Sales for 450 S 40th Street

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
450 S 41st St, Boulder, CO
0.05
Single-Family Home
$1,095,000
03/13/26
5
3
2,800
375 S 40th St, Boulder, CO
0.07
Single-Family Home
$1,175,000
04/24/26
6
3
2,800
345 S 38th St, Boulder, CO
0.15
Single-Family Home
$1,186,000
04/16/26
5
2.5
2,304
310 S 40th St, Boulder, CO
0.15
Single-Family Home
$1,199,000
06/18/26
4
2.5
2,524
650 S 45th St, Boulder, CO
0.30
Single-Family Home
$995,000
11/06/25
5
2.5
2,632
135 S 42nd Street, Boulder, CO
0.30
Single-Family Home
$970,000
06/12/26
5
2.5
2,214
615 S 42nd St, Boulder, CO
0.16
Single-Family Home
$735,000
09/26/25
5
3
2,228
405 S 43rd Street, Boulder, CO
0.13
Single-Family Home
$850,000
04/24/26
5
2
2,162
265 S 39th St, Boulder, CO
0.19
Single-Family Home
$998,000
07/02/26
3
2.5
2,304

Nearby homes

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Assigned Schools

These are the assigned schools for 450 S 40th Street.
View nearby schools on GreatSchools
The GreatSchools Rating compares schools on a variety of school quality indicators including test scores, college readiness, equity and more. Learn more.

Neighborhood Overview

Martin Acres
See Local Highlights
Neighborhood stats provided by third party data sources.

What Locals Say about Martin Acres

At least 18 Trulia users voted on each feature.

  • 91 % Say there are sidewalks

  • 90 % Say it's walkable to restaurants

  • 87 % Say there's wildlife

  • 83 % Say it's dog friendly

  • 81 % Say people would walk alone at night

  • 78 % Say it's walkable to grocery stores

  • 63 % Say car is needed

  • 60 % Say yards are well-kept

  • 59 % Say parking is easy

  • 50 % Say kids play outside

  • 46 % Say there's holiday spirit

  • 45 % Say neighbors are friendly

  • 43 % Say streets are well-lit

  • 33 % Say there are community events

  • 29 % Say they plan to stay for at least 5 years

  • 29 % Say it's quiet

Sourced by Trulia users. Learn more about our methodology.
  • Trulia User
    "There are great access to public transportation and lots of paths are maintained for biking or for walking"
    0
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  • Trulia User
    "On the bus line, easy commute! Walk to Table Mesa Shopping Center, King Soopers, Whole Foods, near NCAR, bike to CU."
    0
    Flag
  • Trulia User
    "We have neighborhood concerts/block parties. Really great way to connect and hear live music. We also have Farm to Bus, which is a farmer's market on a bus. They have fresh eggs and bread, as well as locally grown honey. There's a park nearby which is a great place to exercise abd chat with other neighbors."
    0
    Flag
  • Juliebfuller
    "Great kid friendly neighborhood . Great schools. Perfect for families. Easy to bike to many places and catch the bus "
    0
    Flag
  • Rachel B.
    "I've lived here for 4 years and absolutely love this neighborhood. People are friendly, there's mountain views, and it's a wonderful area to take walks and enjoy the outdoors"
    0
    Flag
  • Jake M.
    "I take the ff2 to Union station in Denver, then the 0. 75 minutes door to door. it's not bad at all! just a 10 min walk to the bus and one transfer."
    0
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  • Roni S.
    "The ideal location for students of families, it has amazing views and wonderful food! We haven’t lived here long and already feel at home!"
    0
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  • Karl B.
    "For anyone who wants to have easy access to hiking, biking and trail running the Martin Acres Community is an area to consider. Martin Park has a lot of bike paths that connect to other parts of Boulder. Within minutes via bike, car or bus you can be in downtown Boulder. For those who need to commute out of Boulder Hwy 36 is easy to get on to. Most of the homes are built of brick and many have been updated."
    1
    Flag
  • catidid100
    "Great area -- and easy access to Denver or Boulder/CU. The Park and Ride to Denver is a 5 minute walk from my house and the bus stop into Boulder is at the end of my street. Easy bike ride to CU and to downtown Boulder, great bike paths. Great neighborhood -- mix of college students, families, retirees, CU professionals. Active neighborhood association."
    0
    Flag

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Off Market Homes Near 450 S 40th Street

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