450 S 40th St

Boulder, CO 80305

$975,000
Last Sold Price
5
Beds
2,800 Sq. Ft.
$348 / Sq. Ft.
2,800
Sq. Ft.
$348
per Sq. Ft.
Get preapproved with Rocket Mortgage1
Closed 2/20/26
Closed 2/20/26
a front view of a house with garden
a view of a city
a living room with furniture a fireplace and a table
a living room with furniture and a table
a bedroom with a large bed and a chandelier
a view of living room with furniture and fireplace
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a view of an empty room with a fireplace and a window
wooden floor in an empty room with a window
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a kitchen with stainless steel appliances a refrigerator and a stove top oven
a kitchen with stainless steel appliances granite countertop a stove a sink dishwasher and a microwave oven with cabinets
a kitchen with stainless steel appliances granite countertop a stove a sink and a microwave
a kitchen with stainless steel appliances granite countertop a sink stove and refrigerator
a view of room with window and hardwood floor
a view of an empty room with wooden floor and a ceiling fan
a view of a room with wooden floor and a ceiling fan
a bathroom with a sink shower vanity and a mirror
a view of a room with wooden floor and window
a bathroom with a toilet sink and mirror
an empty room with a fireplace and windows
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a view of an empty room
a view of entryway
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Description

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...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!
  1. Listed by Lex Campaldini • Redfin Corporation
    P: (720)-660-9491 C: (720)-660-9491 Lex.Campaldini@redfin.com
  2. Listed by James Ayala • Redfin Corporation
    P: (303)-875-1536 Antonio.Ayala@redfin.com

Property Details for 450 South 40th Street

Structure Type
House
Architectural Style
Deciduous Trees, Gutters, Bay or Bow Window
View
Mountain(s)
Levels
One
Subdivision Name
Martin Acres
Association
No
Multiple Associations
No
Basement
Yes
LISTING UPDATED: 02/23/2026 10:55 AM

Property Details for 450 South 40th Street

StatusClosed
MLS #4297182
Days on Compass71
Taxes$6,496 / year
HOA Fees-
Condo/Co-op Fees-
Compass TypeSingle Family
MLS TypeResidential / Single Family Residence
Year Built1956
Lot Size0.16 AC / 6,913 SF
CountyBoulder County
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Location

Listing Courtesy of Redfin Corporation, Lex Campaldini; Redfin Corporation, James Ayala

Sold By RE/MAX Alliance - Olde Town, Tavia Galvin; RE/MAX Alliance - Olde Town, Nicki Thompson

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Building Information for 450 South 40th Street

Stories-Year Built1956Building Size-Lot Size0.16 AC / 6,913 SF

Payment Calculator

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OriginPoint Mortgage or Rocket Mortgage1

$5,293 per month

30 year fixed, 6.15% Interest

Principal and Interest

$4,752

Property Taxes

$541

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

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Property Information for 450 South 40th Street

Interior Area & SqFt
Interior Area & SqFt
  • Building Area Total (SqFt Total): 2800
  • Sqft Total: 2800
  • Living Area (SqFt Finished): 2660
  • Above Grade Finished Area: 1400
  • Living SqFt: 1400
  • Sq Ft Apx: 1260
  • Below Grade Unfinished Area: 140
  • Area Source: Public Records
  • PSF Total: 348
  • PSF Above Grade: 696
  • PSF Finished: 367
  • Master on Main: Yes
  • Room and Floor: Living Room-Main-1, Dining Room-Main-1, Kitchen-Main-1, Bathroom Full-Main-1, Master Bedroom-Main-1, Bathroom Three Quarter-Main-1, Bedroom-Main-1, Bedroom-Main-2, Living Room-Basement-1, Bedroom-Basement-1, Bedroom-Basement-2, Bathroom Full-Basement-1, Laundry-Basement-1
  • Room Count: 13
  • Basement: Bath/Stubbed, Exterior Entry, Finished, Interior Entry
  • Fireplaces Total: 2
  • Fireplace Features: Basement, Living Room
  • Heating: Forced Air, Natural Gas
  • Cooling: Central Air
  • Interior Features: Granite Counters, Primary Suite, Smoke Free, Sound System
  • Security Features: Carbon Monoxide Detector(s), Radon Detector, Smoke Detector(s), Video Doorbell
  • Flooring: Carpet, Tile, Wood
  • Window Features: Bay Window(s), Double Pane Windows, Window Coverings
  • Furnished: Unfurnished
  • Appliances: Dishwasher, Dryer, Microwave, Oven, Refrigerator, Washer
  • Laundry Features: Dishwasher, Refrigerator, Washer, Dryer, Microwave, Fire Alarm
Financials & Expenses
Fees & Restrictions
  • Pets Allowed: Yes
Bed & Bath Summary
Bedrooms
  • Bedrooms Total: 5
  • Upper Level Bedrooms: 0
  • Main Level Bedrooms: 3
  • Lower Level Bedrooms: 0
  • Basement Level Bedrooms: 2
Bathrooms
  • Bathrooms Total: 3
  • Upper Level Bathrooms: 0
  • Main Level Bathrooms: 2
  • Lower Level Bathrooms: 0
  • Basement Level Bathrooms: 1
  • Bathrooms Full: 2
  • Bathrooms Three Quarter: 1
  • Bathrooms Half: 0
  • Bathrooms One Quarter: 0
Detailed Room Info
Room 1
  • Room Type: Living Room
  • Room Level: Main
  • Room Description: Hardwood flooring, fireplace
  • Room Length: 14
  • Room Width: 13
Room 2
  • Room Type: Dining Room
  • Room Level: Main
  • Room Description: Hardwood flooring, formal dining space
  • Room Length: 25
  • Room Width: 13
Room 3
  • Room Type: Kitchen
  • Room Level: Main
  • Room Description: Tile flooring, stainless steel appliances
  • Room Length: 10
  • Room Width: 14
Room 4
  • Room Type: Bathroom Full
  • Room Level: Main
  • Room Description: Tile flooring
  • Room Length: 7
  • Room Width: 10
Room 5
  • Room Type: Bedroom
  • Room Level: Main
  • Room Description: Hardwood flooring, ensuite bathroom, ceiling fan
  • Room Length: 11
  • Room Width: 13
Room 6
  • Room Type: Bathroom Three Quarter
  • Room Level: Main
  • Room Description: Tile flooring, step-in shower
  • Room Length: 5
  • Room Width: 8
Room 7
  • Room Type: Bedroom
  • Room Level: Main
  • Room Description: Hardwood flooring
  • Room Length: 11
  • Room Width: 13
Room 8
  • Room Type: Bedroom
  • Room Level: Main
  • Room Description: Hardwood flooring
  • Room Length: 10
  • Room Width: 13
Room 9
  • Room Type: Living Room
  • Room Level: Basement
  • Room Description: Carpet, fireplace
  • Room Length: 35
  • Room Width: 13
Room 10
  • Room Type: Bedroom
  • Room Level: Basement
  • Room Description: Carpet, walk-in closet, non-conforming, ensuite bathroom
  • Room Length: 17
  • Room Width: 13
Room 11
  • Room Type: Bathroom Full
  • Room Level: Basement
  • Room Description: Tile flooring
  • Room Length: 7
  • Room Width: 5
Room 12
  • Room Type: Bedroom
  • Room Level: Basement
  • Room Description: Carpet, non-conforming
  • Room Length: 14
  • Room Width: 13
Room 13
  • Room Type: Laundry
  • Room Level: Basement
  • Room Description: Side-by-side washer and dryer, sink
  • Room Length: 10
  • Room Width: 13
Parking
Parking
  • Parking Features: Exterior Access Door, Lighted, Storage
  • Attached Garage: Yes
  • Parking Type: Garage (Attached), Off-Street
  • Parking Description: Garage (Attached)-1, Off-Street-1
  • Parking Details: 1
  • Parking Total: 2
  • Garage Spaces: 1
  • Offstreet Spaces: 1
  • Parking Count: 2
  • Carport Spaces: 0
  • Reserved Spaces: 0
  • RV Spaces: 0
Association Information
Association Information
  • Association Fee Total Annual: $0
  • Senior Community: No
Site & Location Information
School Information
  • Elementary School: Creekside
  • Elementary School District: Boulder Valley RE 2
  • Middle Or Junior School: Manhattan
  • Middle Or Junior School District: Boulder Valley RE 2
  • High School: Fairview
  • High School District: Boulder Valley RE 2
Site & Location Information
  • Lot Size Acres: .16
  • Lot Size Square Feet: 6913
  • Lot Features: Many Trees, Near Public Transit, Sprinklers In Front, Sprinklers In Rear
  • Accessibility Features: Deciduous Trees, Gutters
  • Property Exclusions: None
Building Information
Green Features
  • Green Verification Count: 0
  • Green Energy Efficient: Thermostat
Outbuildings
  • Out Building Count: 0
  • Horse: No
Building Information
  • Construction Materials: Brick, Wood Siding
  • Roof: Composition
  • Common Walls: No Common Walls
  • Exterior Features: Private Yard, Rain Gutters
  • Patio And Porch Features: Patio
  • Livable Structure Count: 0
Water & Utilities
Water & Utilities
  • Water Included: Yes
  • Water Source: Public
  • Utilities: Cable Available, Electricity Connected, Internet Access (Wired), Natural Gas Connected, Phone Available
  • Sewer: Public Sewer

Property History for 450 South 40th Street

DateEvent & SourcePriceAppreciation
Jun 13, 2017

Sold (Public Record)

Public Record #598173256

$735,000

+6.5% / yr

May 14, 2010

Sold (Public Record)

Public Record #289580257

$470,000—
DateEvent & SourcePrice
06/13/2017

Sold (Public Record)

Public Record #598173256

$735,000

+6.5% / yr

05/14/2010

Sold (Public Record)

Public Record #289580257

$470,000

For completeness, Compass often displays two records for one sale: the MLS record and the public record.

Public Records for 450 South 40th Street

Taxable ValueLand$34,288Additions$32,875Total$67,163
Tax Record2025$6,404 ($534 / month)
Home Facts
Beds4Baths2.8Total Finished SqFt2,660 SqFtAbove Grade Finished SqFt1,400 SqFtFinished Basement SqFt1,260 SqFtUnfinished Basement SqFt140 SqFtStories1Lot Size6,926 SqFtStyleSingle Family ResidenceYear Built1956Year Renovated1995Zoning1112CountyBOULDERAPN1577-05-4-23-018

Schools near 450 South 40th Street

This home is within Boulder Valley Re 2 School District.
Rating
School
Type
Grades
Distance
Creekside Elementary School At Martin Park
Public - PK to 5
Manhattan Middle School Of The Arts And Academics
Public - 6 to 8
Fairview High School
Public - 9 to 12
Summit Middle Charter School
Charter - 6 to 8
Rating
School
Distance
Creekside Elementary School At Martin Park
PublicPK to 5

Manhattan Middle School Of The Arts And Academics
Public6 to 8

Fairview High School
Public9 to 12

Summit Middle Charter School
Charter6 to 8

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity.

Listing Courtesy of Redfin Corporation, Lex Campaldini; Redfin Corporation, James Ayala

Based on information submitted to the MLS GRID as of 02/23/2026 10:55 AM. 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. Properties displayed may be listed or sold by various participants in the MLS. IDX information is provided exclusively for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. The data is deemed reliable but is not guaranteed by MLS GRID. Use of the MLS GRID data may be subject to an end user license agreement prescribed by the applicable MLS of the Member Participant, if any, and as amended from time to time.