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$1,600,000
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Property Description
Timeless Elegance in the Heart of Old Town, one of Longmont's most distinguished historic residences, The Emmons-Adler House. A rare opportunity in turn-of-the-century architecture, bold, symmetrical, and commanding on its half-acre lot along coveted 3rd Avenue. The crown jewel of the exterior is the sweeping wrap-around porch, perfectly proportioned to match the home's stately presence. Whether you're sipping morning coffee as the neighborhood stirs to life or hosting friends on a warm Colorado evening, this porch is the kind that makes passersby stop and stare. It is quintessential Old Town living at its finest. Inside, over 5,000 square feet of thoughtfully arranged living space unfolds across three generous bedrooms, three bathrooms, and a spectacular bonus third-floor great room. Throughout the home, soaring leaded-glass windows cast ever-changing light across richly appointed rooms, their artistry a daily reminder of the era's uncompromising craftsmanship. Deep woodwork, gracious proportions, and the quiet confidence of a home that has stood beautifully for over a century complete an interior that no new construction can replicate. The historic designation confers a deep sense of pride of ownership and places this property among a rare and celebrated collection of Longmont's most treasured homes. The grounds are nothing short of exceptional. The rare half-acre lot is lushly private and serene - a true urban sanctuary in the heart of Old Town. A charming garden house anchors the backyard, perfect as a studio, workshop, or haven for the dedicated gardener. The detached two-car garage provides ample storage and parking, while the drive-through driveway adds a gracious, practical elegance. The private garden area is a hidden gem. Mature trees and beautiful outdoor spaces complete a setting that is as livable as the home itself. Stroll to restaurants, coffee houses, breweries, shops, local events, and all Downtown has to offer. Love Where You Live
Full Property Details
Full Property Details for 858 3rd Ave
General
- Price: $1,600,000
- Taxes: $8,270 (2025)
- Status: Under Contract
- Type: Single Family
- Source: IRES
- MLS ID: 1057599
- Updated: 6/1/2026
- Added to Site: 73 day(s) ago
Interior
- Interior Features: Eat-In Kitchen, Separate Dining Room, Wood Windows, Bay or Bow Window, Natural Woodwork, Walk-In Closet(s), Steam Shower, High Ceilings, Crown Molding
- Fireplace: Yes
- Fireplace(s): Family Room
- Appliances: Gas Range, Double Oven, Dishwasher, Refrigerator, Microwave
- Flooring: Wood
Rooms
Bathrooms
- Total Bathrooms: 3
- Full Bathrooms: 1
- 3/4 Bathrooms: 1
- Half Bathrooms: 1
Bedrooms
- Total Bedrooms: 3
Exterior
- Exterior Features: Sprinkler System, Balcony, Oversized Garage, Carriage House
- Porch/Patio/Deck: Deck
Parking
- Garage: Yes
- Garage Spaces: 2
- Parking Features: Garage Door Opener, Detached
- Garage Description: Detached
Location
- Area: Longmont
- County: Boulder
- Subdivision: Old Town
- Driving Directions: From Main Street, 3rd Avenue west to the property on the corner.
School Information
- School District: ST Vrain Dist RE 1J
- Elementary School: Central
- Middle School: Westview
- High School: Longmont
Heating & Cooling
- Heating Type: Hot Water
Utilities
- Gas: Yes
- Gas: Xcel
- Sewer: Public Sewer
- Water: City
- Utility Description: Natural Gas Available, Electricity Available, Cable Available, High-Speed Internet Available
Structural Information
- Construction: Brick, Block
- Exterior Const.: Brick, Block
- Basement: Yes
- Basement Desc.: Partially Finished, Walk-Out Access
- Roof: Tile
- Windows: Window Coverings
- Doors: French Doors
- Square Feet: 5,371
- Sq. Ft. Source: Other
- Living Area: 4,055 Sq. Ft.
- Year Built: 1903
Lot Features
- Property View: Hills
- Lot Size (Acres): 0.5
- Lot Size (Sq. Ft.): 21,636
- Frontage: City Street
- Street/Road Desc.: Asphalt
- Fence: Yes
- Lot Features: Corner Lot, Deciduous Trees, Historic District, House Faces South, Paved
- Potential Use: Single-Family
- Zoning: Res
- Fencing (Description): Partial
Financial Considerations
- Tax Amount: $8,270
- Tax Year: 2025
- Terms: Cash, Conventional
Disclosures and Reports
- Special Conditions: Private Owner
- Exclusions: Staging items
- Property ID: R0039924
Listed by Heather Brandt (303) 489-0755
Get Pre-Approved Today
Schools
Schools serving 858 3rd Ave
School District:St. Vrain Valley School District Re 1j
| Name | Grades | Distance |
|---|---|---|
Central Elementary School, Longmont, CO 1020 4th Avenue, Longmont, CO 80501 | PK-5 | 0.2 mi |
Westview Middle School 1651 Airport Road, Longmont, CO 80503 | 6-8 | 3.1 mi |
Longmont High School 1040 Sunset Street, Longmont, CO 80501 | 9-12 | 1.1 mi |
Disclaimer:
School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.
Price & Sales History for 858 3rd Ave
Date
Details
Price
Change
Source
5/01/2026
Listed
$1,600,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
Tax History
Tax History for 858 3rd Ave
Year
Property Taxes
Change
Tax Assessment
Change
2025
$8,270
12%
$92,508
10%
2024
$7,409
1%
$84,152
-4%
2023
$7,308
15%
$87,838
24%
2022
$6,348
-1%
$71,099
-3%
2021
$6,430
—
$73,144
21%
2021
$6,430
26%
$60,554
—
2019
$5,106
33%
$60,554
27%
2018
$3,840
1%
$47,628
—
2017
$3,788
-6%
$47,628
-5%
2016
$4,033
5%
$50,148
—
2015
$3,843
5%
$50,148
6%
2014
$3,646
—
$47,139
—
2013
$3,659
—
$47,139
—
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
Estimate the Cost
Estimate the Cost for 858 3rd Ave
858 3rd Ave, Longmont, CO 80501 (MLS# 1057599) is a Single Family property with 3 bedrooms, 1 full bathroom and 2 partial bathrooms. 858 3rd Ave is currently listed for $1,600,000 and was received on April 27, 2026. Want to learn more about 858 3rd Ave? Do you have questions about finding other Single Family real estate for sale in Longmont? You can browse all Longmont real estate or contact a Coldwell Banker agent to request more information.

