2121 4th St, Boulder, CO 80302
OFF MARKET

2121 4th St
Boulder, CO 80302

Mapleton Hill
  • 6 Beds
  • 5 Baths
  • 5,401 sqft (on 0.54 acres)

$5,196,000

Trulia Estimate
as of May 10, 2026
Est. Refi. Payment $27,829/mo*
Refinance Your Home

$5,196,000

Trulia Estimate
as of May 10, 2026
Est. Refi. Payment $27,829/mo*
Refinance Your Home
6 Beds
5 Baths
5,401 sqft
(on 0.54 acres)

Homes for sale near 2121 4th St

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Apartments for Rent

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Local Information

Map showing home location
© Google
-- mins to
Commute Destination

Description

This single-family home is located at 2121 4th St, Boulder, CO. 2121 4th St is in the Mapleton Hill neighborhood in Boulder, CO and in ZIP code 80302. This property has 6 bedrooms, 5 bathrooms and approximately 5,401 sqft of floor space. This property has a lot size of 0.54 acres and was built in 1962.
This property is off market, which means it's not currently listed for sale or rent on Trulia. This may be different from what's available on other websites or public sources.

Home Highlights

Parking
Garage
Outdoor
Deck
A/C
Heating & Cooling
HOA
None
Price/Sqft
No Info
Listed
No Info

Home Details for 2121 4th St

Interior Features

Heating & Cooling
Heating: Other, OtherAir ConditioningCooling System: CentralHeating Fuel: Other
Interior Details
Number of Rooms: 15

Exterior Features

Exterior Home Features
Roof: AsphaltDeckExterior: Shingle, Stone, Wood
Parking & Garage
GarageParking: Garage Attached

Property Information

Year Built
Year Built: 1962Year Updated: 2005
Property Type / Style
Property Type: Single Family HomeArchitecture: split level

Community

Units in Building: 1

Lot Information

Lot Area: 0.54 acres

Price History for 2121 4th St

DatePriceEventSource
06/18/1996$1,150,000Sold
N/A
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Property Tax and Assessment

Year2025
Tax$33,840
Assessment$5,971,100
Home facts updated by county records

Comparable Sales for 2121 4th St

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
2237 4th St, Boulder, CO
0.12
Single-Family Home
$2,180,000
09/29/25
2
5
4,294
2449 5th St, Boulder, CO
0.30
Single-Family Home
$2,651,475
05/01/26
5
4
3,549
563 Arapahoe Ave, Boulder, CO
0.35
Single-Family Home
$3,700,000
12/17/25
4
4
3,317
2586 3rd St, Boulder, CO
0.40
Single-Family Home
$4,210,200
03/09/26
5
4
4,390
720 Mapleton Ave, Boulder, CO
0.33
Single-Family Home
$4,587,500
09/29/25
5
5.5
5,091
349 W Arapahoe Ln, Boulder, CO
0.27
Single-Family Home
$2,240,000
04/14/26
3
3.5
3,711
2697 4th St, Boulder, CO
0.53
Single-Family Home
$4,000,000
11/21/25
6
5.5
3,887
512 Marine St, Boulder, CO
0.45
Single-Family Home
$4,650,000
11/21/25
4
4.5
4,904
721 Concord Ave, Boulder, CO
0.49
Single-Family Home
$2,600,000
06/16/25
5
4
4,045
720 Mapleton Ave, Boulder, CO
0.33
Single-Family Home
$4,587,500
09/29/25
5
5.5
3,675

Assigned Schools

These are the assigned schools for 2121 4th St.
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

Mapleton Hill
See Local Highlights
Neighborhood stats provided by third party data sources.

What Locals Say about Mapleton Hill

At least 9 Trulia users voted on each feature.

  • 100 % Say it's walkable to restaurants

  • 100 % Say there are sidewalks

  • 95 % Say it's dog friendly

  • 90 % Say it's walkable to grocery stores

  • 84 % Say yards are well-kept

  • 82 % Say people would walk alone at night

  • 78 % Say kids play outside

  • 75 % Say there's wildlife

  • 67 % Say there's holiday spirit

  • 67 % Say parking is easy

  • 67 % Say there are community events

  • 64 % Say it's quiet

  • 63 % Say they plan to stay for at least 5 years

  • 57 % Say neighbors are friendly

  • 56 % Say streets are well-lit

  • 29 % Say car is needed

Learn more about our methodology.
  • Trulia User
    "I bike to campus in 20 minutes and it’s great besides the traffic and gas fumes from cars which sucks transit is very good here, bus stops all up and down Broadway."
    0
    Flag
  • Trulia User
    "It seems as if most people own dogs . Very dog friendly . Dogs always seem well trained . Dogs also seem very friendly . "
    1
    Flag
  • Liz J.
    "There are lots of dog walkers and runners. Many wet dogs show that there is good swimming in the ditches. "
    1
    Flag
  • Taraarnolds
    "Loads of people out walking dogs and many folks stopping to chat too. You'll sometimes hear a dog or two barking, but never for long."
    0
    Flag
  • Thomas
    "I've lived in the Mapleton Hill neighborhood for 5 years. It is so convenient and quaint; my kids just love having the freedom to play with all the other kids here."
    1
    Flag
  • Maxclauson c. n.
    "Historic neighborhood that is close to town but secluded enough to be calm and quiet. Filled with interesting new arrivals and long time residents. "
    3
    Flag
  • Noah B.
    "Quiet and calm neighborhood, close to everything that makes Boulder great. Easy access to Pearl, Sanitas, Wonderland, and Ideal Market area. "
    1
    Flag
  • amazingdairy
    "West Pearl is truly a neighborhood unto itself, with a variety of shops & cafes and easy access to trails. Start your day with some tea and scones at Spruce Confections, enjoy browsing various antique stores and Two Hand Paperie, then select a bottle of wine at West End Wine Shop. Lolita's is conveniently located across the street to pick up last minute groceries for dinner, or you can enjoy a slice at Nick and Willy's and have some confectionary treats at Piece, Love & Chocolate. Settlers' Park is just down the street, as well as the trail heads to Red Rocks & Sanitas, and the Boulder Bike Path. When you live here, everything that makes Boulder so wonderful is only steps away!"
    2
    Flag

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Homes for rent near 2121 4th St

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Off Market Homes Near 2121 4th St

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Explore by feature

2121 4th St, Boulder, CO 80302 is a 6 bedroom, 5 bathroom, 5,401 sqft single-family home built in 1962. 2121 4th St is located in Mapleton Hill, Boulder. This property is not currently available for sale. 2121 4th St was last sold on Jun 18, 1996 for $1,150,000. The current Trulia Estimate for 2121 4th St is $5,196,000.