6399 Union Ave, Firestone, CO 80504
Property image
Property image
OFF MARKET

$625,800

Trulia Estimate
  • 4 Beds
  • 4 Baths
  • 2,909 sqft (on 0.36 acres)

6399 Union Ave, Firestone, CO 80504

Est. Refi. Payment $3,515/mo*
Refinance Your Home
Currently Off Market - Sold Apr 2, 2020 for $486,500

Home Value

Trulia Estimate
$626K
Since last month
$200 (0%)
Since last year
Decreased$4K (-0.6%)
Since last sale
Increased$139K (+28.6%)
Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value increased by +75% in the last 10 years
MonthEstimated value
2026
August 2026$625K
July 2026$626K
June 2026$640K
May 2026$634K
April 2026$632K
March 2026$628K
February 2026$618K
January 2026$603K
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.
Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
6441 Union Ave, Firestone, CO
0.05
Single-Family Home
$625,000
12/03/25
4
2.5
3,888
6446 Union Avenue, Firestone, CO
0.06
Single-Family Home
$614,700
11/14/25
4
2.5
4,434
11388 Ebony Street, Firestone, CO
0.13
Single-Family Home
$515,000
08/17/26
4
3.5
2,099
6398 Twilight Avenue, Firestone, CO
0.08
Single-Family Home
$671,000
08/10/26
4
3.5
3,526
11226 Dover St, Firestone, CO
0.23
Single-Family Home
$535,000
05/05/26
4
3.5
2,671
11392 Ebony St, Firestone, CO
0.14
Single-Family Home
$520,000
03/10/26
4
2.5
2,349
6289 Viewpoint Avenue, Firestone, CO
0.22
Single-Family Home
$580,000
05/29/26
5
3.5
2,888
6358 Union Ave, Firestone, CO
0.08
Single-Family Home
$570,000
10/24/25
4
2.5
4,129
11256 Ebony St, Firestone, CO
0.02
Single-Family Home
$578,000
10/10/25
3
2.5
3,962
11232 Ebony Street, Firestone, CO
0.04
Single-Family Home
$575,000
11/26/25
3
2.5
3,327

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.
Address
Distance
Price
Bed
Bath
Sqft
Status
11256 Ebony St, Firestone, CO 80504
0.02
$582,700
3
2.5
3,962
Off Market
11314 Ebony St, Firestone, CO 80504
0.06
$509,600
3
3
2,051
Off Market
6441 Union Ave, Firestone, CO 80504
0.05
$625,000
4
2.5
3,888
Recently Sold
11232 Ebony Street, Firestone, CO 80504
0.04
$575,000
3
2.5
3,327
Recently Sold
6446 Union Avenue, Firestone, CO 80504
0.06
$614,700
4
2.5
4,434
Recently Sold
11337 Ebony St, Firestone, CO 80504
0.08
$492,900
3
2.5
2,100
Off Market
6358 Union Ave, Firestone, CO 80504
0.08
$574,800
4
2.5
4,129
Off Market
11361 Ebony St, Firestone, CO 80504
0.11
$525,000
3
3.5
2,888
For Sale
6398 Twilight Avenue, Firestone, CO 80504
0.08
$671,000
4
3.5
3,526
Recently Sold
6348 Union Avenue, Firestone, CO 80504
0.09
$617,500
4
2.5
4,434
Recently Sold
6359 Valley Vista Avenue, Firestone, CO 80504
0.12
$451,200
3
2
1,156
Off Market
6370 Twilight Ave, Firestone, CO 80504
0.10
$568,800
4
2.5
4,122
Off Market

Local Information

  • Map ViewExplore the area around 6399 Union Ave.
  • Schools1 Preschool School1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Year Built
2007
Lot Size
0.36 acres
Living Area
2,909 sqft
Price/Sqft
$215
Parking
Garage

About this House

When entering the front door of this outstanding home, you'll be amazed by the soaring ceilings in the living area, abundant light throughout & tasteful updates. And it doesn't stop there - this is a unique property with lots of special features. Freshly painted throughout most of the main level + new durable engineered bamboo flooring. Updated kitchen with breakfast nook, granite counters & newer gas range. Main floor bedroom/office located next to a full bathroom that could be great for guests. Upstairs features a huge master suite with sitting area & luxurious 5-piece bathroom. Upstairs laundry room - washer & dryer included. Finished basement has a large recreation area or family room, a 4th bedroom, full bath & brand new carpet throughout. Furnace & hot water heater replaced in 2017. Roof & gutters replaced in 2019. Massive lot with a sprinkler system in the front & back. Last but not least, an incredible FOUR-car garage with lots of built-ins for storage. OPEN HOUSE 3/7 12-3PM!
6399 Union Ave, Firestone, CO 80504 is a 4 bedroom, 4 bathroom, 2,909 sqft single-family home built in 2007. It last sold for $486,500 on Apr 2, 2020. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $625,800, with a rent estimate of $3,215/month.

Home Details for 6399 Union Ave

Interior Features

Interior Details
Basement
Levels, Entrance, & Accessibility
Stories: 2Floors: Other
Appliances & Utilities
DishwasherDryerMicrowaveRefrigeratorWasher
Heating & Cooling
Air ConditioningCooling System: Central

Exterior Features

Exterior Home Features
Roof: CompositionExterior: Wood
Parking & Garage
GarageParking: Garage Attached

Property Information

Year Built
Year Built: 2007
Property Type / Style
Property Type: Single Family HomeArchitecture: Other

Community

Units in Building: 1

Lot Information

Lot Area: 0.36 acres

Price and Tax history

DateEventPrice
Apr 2, 2020
Source: IRES as distributed by MLS GRID #905819
Sold
$486,500
Mar 10, 2020
Source: Agent Provided
Pending
$479,500
Mar 6, 2020
Source: Agent Provided
Listed For Sale
$479,500
Aug 30, 2013
Source: IRES as distributed by MLS GRID #715334
Sold
$270,000
Oct 1, 2008
Source: N/A
Sold
$259,000

Market trends in Firestone

Last updated July 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
—
Sale-to-List Price
—
Price per sq ft
—
Available listings
64
2MoM

Around this home

What Locals Say about Firestone

At least 70 Trulia users voted on each feature.

  • 98 % Say it's dog friendly

  • 93 % Say parking is easy

  • 92 % Say there are sidewalks

  • 90 % Say yards are well-kept

  • 88 % Say car is needed

  • 87 % Say people would walk alone at night

  • 85 % Say kids play outside

  • 81 % Say there's holiday spirit

  • 80 % Say streets are well-lit

  • 78 % Say it's walkable to grocery stores

  • 76 % Say it's quiet

  • 61 % Say neighbors are friendly

  • 59 % Say they plan to stay for at least 5 years

  • 51 % Say there's wildlife

  • 46 % Say there are community events

  • 44 % Say it's walkable to restaurants

Sourced by Trulia users. Learn more about our methodology.
  • Lindagailmoore
    "It is a nice area to walk dogs, with a great open space park in the neighborhood where I live, as well as several trails running through town. Most of the parks have pickup bags. Most of the city trails get plowed in the winter when there is snow. It’s a god dog-friendly area."
    0
    Flag
  • Dianaandbruce
    "Quiet, friendly and diverse neighborhood. People are welcoming. Many amenities are nearby; some within walking distance. "
    0
    Flag
  • Kyler Vandegrift
    "My neighborhood is very friendly. All my neighbors are nice and there’s a relatively nice feel of community."
    0
    Flag
  • Ppurcell
    "A small conservative town on the front range of Colorado. It’s a nice , safe clean community for now. Big city feel is creeping on our community but it still feels small and neighborly. Crime is coming up from the bigger city and we are seeing more as Colorado falls deeper in to the Liberal wasteland where crime is wildly out of control and the drug/ homeless epidemic grows every year. "
    0
    Flag
  • Paul L.
    "I’ve lived here for 5 years and love it. Close to Denver, Ft Collins and Boulder yet still a small town. "
    4
    Flag
  • Michelerudnick16
    "Everyone looks out for each other. Local police patrol the neighborhood. Everyone minds their own business"
    0
    Flag
  • Briannaomalley
    "Close enough to bigger cities but far enough it still feels small and intimate. Grew up here and will continue to raise my children here. "
    2
    Flag
  • Briannaomalley
    "There’s only one dog park, it’s well maintained but still more parks they could run around off leash without getting in trouble would be nice. There are lots of trails and sidewalks for great walks though! "
    0
    Flag
  • Arlene M.
    "Not much, it reminds me of growing up in the1950’s. The homes and yards are well maintained, it’s quiet, children play together and all of the adults watch out for them. The crime rate is very low. Everyone is friendly and takes pride in their home and the neighborhood"
    1
    Flag
  • Jlynnramos
    "This neighborhood is very clean and safe. great for families. this is growing at the perfect rate as well, with getting more options for food and diversity. "
    1
    Flag
  • Mamaofone2011
    "One of my favorite things about this area are Summer movie nights events in the park, with food trucks, outdoor activities etc. "
    0
    Flag
  • Aimee P.
    "There are lots of dogs in the area and people are always out walking them. there are also lots of walking paths and open area for dogs."
    0
    Flag
  • April H.
    "Good neighborhood n kid friendly clean area nice parks and super safe I would definitely recommend it to a family with kids "
    0
    Flag
  • Mila M.
    "We get a parade every Christmas from our local police & fire depart. They walk down every block in the entire city, such a great tradition for the community!! "
    0
    Flag
  • Paul L.
    "I’ve lives in this neighborhood for 4 years and love it. Nicely situated with easy access to Denver or Ft. Collins with a small-town charm. Friendly people with an abundance of empty-nesters. "
    0
    Flag
  • Kendra C.
    "Firestone is a great place for families. Far enough from the metro for peace and quiet, but close enough for restaurants and easy shopping."
    0
    Flag
  • Bigwyojohn
    "No public transportation, must have a car and not enough sidewalks to walk along the neighborhoods. "
    0
    Flag

LGBTQ Local Legal Protections

Frequently asked questions about 6399 Union Ave

  • What is 6399 Union Ave estimated to be worth?
    Trulia's estimated value for 6399 Union Ave in Firestone, CO is $625,800.
  • What is the price history for 6399 Union Ave?
    6399 Union Ave in Firestone, CO last sold for $486,500 in April 2020.
  • Is Firestone a buyer's or seller's market?
    Firestone is currently a balanced market, based on recent for-sale activity.
  • What do residents say about Firestone?
    Residents describe Firestone, CO as dog-friendly, easy to park in, and pedestrian-friendly. See recently sold homes in Firestone, CO.
  • Does 6399 Union Ave have air conditioning?
    Yes, 6399 Union Ave in Firestone, CO has air conditioning.
  • Does 6399 Union Ave have laundry facilities?
    Yes, 6399 Union Ave in Firestone, CO has in-unit laundry.

Explore by feature - Pet Friendly

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Explore by feature - Washer/dryer

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Off Market Homes Near 6399 Union Ave

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