345 Dewey Ave, Boulder, CO 80304
OFF MARKET

345 Dewey Ave
Boulder, CO 80304

Mapleton Hill
  • 4 Beds
  • 5 Baths
  • 4,274 sqft

$3,950,800

Trulia Estimate
as of Jun 29, 2026
Est. Refi. Payment $21,157/mo*
Refinance Your Home

$3,950,800

Trulia Estimate
as of Jun 29, 2026
Est. Refi. Payment $21,157/mo*
Refinance Your Home
4 Beds
5 Baths
4,274 sqft

Local Information

  • Map ViewExplore the area around 345 Dewey Ave.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Description

Unparalleled finishes - extraordinary location - Perfectly set in the coveted Trailhead subdivision, with immediate access to all of downtown Boulder and the hiking offered at Mount Sanitas and Redrocks trail system. 345 Dewey Ave is the move-in ready, custom masterpiece you have been waiting for. Every inch has been exquisitely designed with stunning white oak floors and doors throughout, honed and leathered granite countertops and wood burning fireplace surround, herringbone marble backsplash, indoor-outdoor accordion doors, custom curved handrail, art gallery walkway - the finish level is truly immaculate. Outside the reclaimed brick exterior is complemented with Brazilian rosewood paneling, a solar PV system, a unique rooftop living garden and a Tesla charging station. Not to be outdone by the home's top of the line geothermal heating and cooling system. Whether you're looking for an impeccable design, or a supreme location, your search ends here.
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
No Info
A/C
Heating & Cooling
HOA
None
Price/Sqft
No Info
Listed
Less than a day ago

Home Details for 345 Dewey Ave

Interior Features

Interior Details
BasementNumber of Rooms: 10
Heating & Cooling
Heating: Radiant, GeothermalAir ConditioningCooling System: CentralHeating Fuel: Radiant
Levels, Entrance, & Accessibility
Stories: 2
Appliances & Utilities
DishwasherDryerRefrigeratorWasher

Exterior Features

Exterior Home Features
Roof: AsphaltExterior: Stone
Parking & Garage
GarageParking: Garage Detached

Property Information

Year Built
Year Built: 2017
Property Type / Style
Property Type: Single Family Home

Lot Information

Lot Area: 5932 sqft

Price History for 345 Dewey Ave

DatePriceEventSource
10/29/2020$3,425,000Sold
IRES as distributed by MLS GRID #922767
09/29/2020$3,600,000PendingAgent Provided
08/31/2020$3,600,000Listed For SaleAgent Provided
03/13/2014$740,000Sold
IRES as distributed by MLS GRID #732470

Market trends in Boulder

Last updated May 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$955K
$13.33KMoM
Sale-to-List Price
97.9%
1.0%MoM
Price per sq ft
$503
$12MoM
Available listings
775
41MoM
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Property Tax and Assessment

Year2025
Tax$24,600
Assessment$4,162,500
Home facts updated by county records

Comparable Sales for 345 Dewey Ave

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
2586 3rd St, Boulder, CO
0.04
Single-Family Home
$4,210,200
03/09/26
5
4
4,390
2814 3rd St, Boulder, CO
0.22
Single-Family Home
$4,250,000
07/11/25
4
5
4,643
2925 4th St, Boulder, CO
0.32
Single-Family Home
$2,745,000
10/16/25
4
4.5
4,457
2237 4th St, Boulder, CO
0.32
Single-Family Home
$2,180,000
09/29/25
4
4.5
4,108
2656 4th St, Boulder, CO
0.07
Single-Family Home
$5,850,000
03/09/26
6
5.5
4,814
2449 5th St, Boulder, CO
0.19
Single-Family Home
$2,651,475
05/01/26
5
4
3,549
2697 4th St, Boulder, CO
0.09
Single-Family Home
$4,000,000
11/21/25
6
5.5
3,887
2645 5th St, Boulder, CO
0.11
Single-Family Home
$1,725,000
07/02/25
4
4
2,528
2942 4th St, Boulder, CO
0.35
Single-Family Home
$2,100,000
07/24/25
4
3.5
4,208
625 Concord Ave, Boulder, CO
0.25
Single-Family Home
$2,700,000
02/25/26
4
3
4,640

Nearby homes

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Assigned Schools

These are the assigned schools for 345 Dewey Ave.
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

Sourced by Trulia users. 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 sale near 345 Dewey Ave

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Off Market Homes Near 345 Dewey Ave

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345 Dewey Ave, Boulder, CO 80304 is a 4 bedroom, 5 bathroom, 4,274 sqft single-family home built in 2017. 345 Dewey Ave is located in Mapleton Hill, Boulder. This property is not currently available for sale. 345 Dewey Ave was last sold on Oct 29, 2020 for $3,425,000. The current Trulia Estimate for 345 Dewey Ave is $3,950,800.