340 21st St, Boulder, CO 80302
Living room with huge picture window
Full hall bath
OFF MARKET

$1,594,200

Trulia Estimate
as of Sep 16, 2026
  • 3 Beds
  • 3 Baths
  • 2,200 sqft

340 21st St, Boulder, CO 80302

East Chautauqua

Home Highlights

Single-Family Home
2,200 sqft
$725/sqft
Attached Garage

Local Information

  • Map ViewExplore the area around 340 21st St.
  • Schools1 Preschool School1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

About this House

Bright, open, lower Chautauqua home with Flatirons views just 4 blocks to miles of trails and 10 blocks to Chautauqua. Large, open kitchen w/newer stainless appliances, dining room, and family room. Living room w/huge picture window and gas fireplace. Hardwood floors throughout. Private, covered patio & lush, fenced back yard. Washer/Dryer included. Attached garage. Licensed, family-owned rental in a lovely setting.

Lease period could be for 12 or 13 months.
Renter pays for utilities; water, electric/gas, trash, and internet.
No Smoking indoors
Pet deposit $300. Pet fee $35 month.
340 21st St, Boulder, CO 80302 is a 3 bedroom, 3 bathroom, 2,200 sqft single-family home in East Chautauqua. It last sold for $1,166,400 on Dec 7, 2018 (25,820% above the $4,500 asking price). More recently, it was listed as a rental in May 2026 with an asking price of $4,500 per month. That rental listing was removed on May 11, 2026. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $1,594,200, with a rent estimate of $5,152/month.

Home Details for 340 21st St

Property Information

Property Type / Style
Property Type: Single Family Home

Rental Terms, Policies & Fees

Lease Term: 1 YearAvailable: now

Interior Features

Appliances & Utilities
DishwasherDryerMicrowaveRefrigeratorWasher
Levels, Entrance, & Accessibility
Floors: Hardwood

Exterior Features

Exterior Home Features
Lawn
Parking & Garage
Parking: Attached Off Street, On Site

Comparable Sales for 340 21st St

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
370 20th St, Boulder, CO
0.07
Single-Family Home
$1,325,000
03/31/26
5
3
2,700 sqft
2030 Columbine Ave, Boulder, CO
0.16
Single-Family Home
$1,526,000
06/03/26
4
3
2,641 sqft
2032 Mariposa Avenue, Boulder, CO
0.10
Single-Family Home
$1,040,000
03/02/26
3
2
1,327 sqft
419 22nd St, Boulder, CO
0.07
Single-Family Home
$1,232,000
12/04/25
4
2
1,494 sqft
1930 Columbine Avenue, Boulder, CO
0.18
Single-Family Home
$1,425,000
04/08/26
4
3
3,131 sqft
1709 Mariposa Ave, Boulder, CO
0.28
Single-Family Home
$1,606,600
09/03/26
3
3.5
1,802 sqft
2207 Bluebell Ave, Boulder, CO
0.09
Single-Family Home
$1,535,000
01/08/26
4
2
3,432 sqft
1550 Bluebell Avenue, Boulder, CO
0.36
Single-Family Home
$1,400,000
05/20/26
4
4
3,226 sqft
1512 Mariposa Ave, Boulder, CO
0.37
Single-Family Home
$1,025,000
09/26/25
3
2
2,023 sqft
1625 Mariposa Ave, Boulder, CO
0.32
Single-Family Home
$2,500,000
07/20/26
3
2.5
2,340 sqft

Nearby homes

Get a sense of prices in the area by checking nearby homes.
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Rental Market Trends in East Chautauqua

Last updated Sep 2026
Trulia Rent Estimate$5,152/mo
Average rent
$1.45K
$4.55KMoM
Available listings
2
View rental market trends in Boulder, CO

Around this home

Neighborhood Overview

East Chautauqua
See Local Highlights
Neighborhood stats provided by third party data sources.

What Locals Say about East Chautauqua

At least 10 Trulia users voted on each feature.

  • 100 % Say there are sidewalks

  • 83 % Say people would walk alone at night

  • 83 % Say it's dog friendly

  • 77 % Say there's wildlife

  • 71 % Say there's holiday spirit

  • 67 % Say it's walkable to restaurants

  • 67 % Say yards are well-kept

  • 67 % Say parking is easy

  • 64 % Say streets are well-lit

  • 60 % Say car is needed

  • 54 % Say neighbors are friendly

  • 50 % Say they plan to stay for at least 5 years

  • 50 % Say it's quiet

  • 44 % Say kids play outside

  • 43 % Say there are community events

  • 33 % Say it's walkable to grocery stores

Sourced by Trulia users. Learn more about our methodology.
  • Chris O
    "I drive 18 miles towards Denver and / or hit DIA 1 time per week. Proximity to Baseline and 36 is awesome as I don’t have to deal with Boulder traffic. Great neighborhood"
    0
    Flag
  • Francie A.
    "Proximity without congestion"
    0
    Flag

LGBTQ Local Legal Protections

Price and Tax history

DateEventPrice
May 11, 2026
Source: Zillow Rentals
ListingRemoved
$4,500
May 6, 2026
Source: Zillow Rentals
Listed For Rent
$4,500
Apr 28, 2023
Source: Zillow Rentals
ListingRemoved
Apr 19, 2023
Source: Zillow Rentals
Listed For Rent
$4,300
Apr 17, 2021
Source: Zillow Rental Manager
ListingRemoved

Frequently asked questions about 340 21st St

  • What is 340 21st St estimated to be worth?
    Trulia's estimated value for 340 21st St in Boulder, CO is $1,594,200.
  • What is the price history for 340 21st St?
    340 21st St in Boulder, CO last sold for $1,166,400 in December 2018.
  • 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 $904K. That is up $6.67K from the prior month.
  • Does 340 21st St have laundry facilities?
    Yes, 340 21st St in Boulder, CO has in-unit laundry.
  • Does 340 21st St have parking?
    Yes, 340 21st St in Boulder, CO has on-site parking.

Homes for rent near 340 21st St

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Affordability

TIP:Try to keep your rent within a third of your gross household income. Learn why in our Renter's Guide.
For this property
PER YEAR
is the suggested income
Win over prospective landlords with your smart budgeting. As a good rule of thumb, ideally you would have at least three times your monthly rent in combined household income.
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