858 3rd Ave, Longmont, CO 80501 Property Records

Boulder County property record for 858 3rd Ave, Longmont, CO 80501

Property Summary

Property Type	Single Family Home
Details	5 bd · 3 ba · 3,416 sqft · built 1910
Lot Size	0.497 acres (21,636 sqft)
Owner	2 Individual Names on Record
Last Sale	$1,450,000 (Jul 2026)
Tax Bill	$8,269 (2025)
Deeds & Mortgages	Jul 2026 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`1315-03-3-10-012`

Property Details

APN / Parcel Number

Primary APN	`1315-03-3-10-012`
Alternative APNs	`R0039924` `0039924`

Interior

Bedrooms	5 Beds
Full Baths	3 Baths
Total Rooms	11 Rooms
Stories	2 Stories
Building Area	3,416 sqft Living Area
Gross Area	4,392 sqft
1st Floor Area	1,516 sqft
Upper Floors Area	1,360 sqft
Basement Area	1,516 sqft
Interior Walls	Plaster

Exterior

Year Built	Built 1910
Effective Year Built	Effective 1928
Exterior Material	Block/Brick
Construction Type	Masonry / Concrete Block
Lot Area	21,636 sqft (0.497 acres)
Garage Area	552 sqft
Parking Spaces	3 Parking Spaces
Porch	Slab
Porch Area	1,428 sqft
Deck Area	240 sqft

Utilities, Heating & Cooling

Heating System	Hot Water

Location & Zoning

Account Number	R0039924
Street Address	858 3RD AVE
City	LONGMONT
State	CO
Zip	80501-5928
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 6 LESS W 130 FT OF N 50 FT & LESS W 87 FT OF S 12 FT OF N 62 FT & ALL LOT 7 BLK 61 LONGMONT OT
Legal Range	69
Legal Township	2N
Legal Section	03
Legal Subdivision	LONGMONT OT
Legal Block	61
Legal Lot Number	6
Jurisdiction	BOULDER CO
Township / Civil Division	LONGMONT
Census Block Group	2
Census Block	2009
Census Tract	13302

Historic Designation

Source: NPS National Register of Historic Places, as of August 1, 2026

Historic District	Within the West Side Historic District listed 1987 · 117 contributing resources · NRIS 86002846

Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.

Owner

Source: Boulder County records, as of October 16, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individual Names on Record
Mailing Address	858 3RD AVE, LONGMONT, CO 80501-5928
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jul 14, 2026 · Amount on Record
Deed Sale	Jul 14, 2026 · Amount on Record
Prior Sale	Oct 22, 1993 · Amount on Record
Deed Document Number	20264139763
Record Updated	Oct 29, 2026

July 2026: Personal Representative Deed, Transfer

Document Type	Personal Representative Deed
Jurisdiction	BOULDER CO
Recording Date	Jul 14, 2026
Property Address	858 3RD AVE, LONGMONT, CO 80501-5928
Document Number	0004139763
Instrument Date	Jul 13, 2026
Instrument	20264139763
Transaction Type	Transfer
Record Updated	Aug 27, 2026
Title Company	LAND TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$14,645.00
Amount Accuracy	Calculated from Transfer Tax
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	858 3RD AVE, LONGMONT, CO 80501-5928

Mortgage

Document Number	0004139764,
Date	Jul 14, 2026
Instrument	20264139764

Lender

Name	GUILD MORTGAGE COMPANY

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Aug 1, 2056

Interest

Rate Type	Adjustable Rate
Rate	5.5%
Initial Type	Adjustable Rate
Adjustable	Adjustable Rate Rider
Max Rate	-1%

Tax Assessment & Valuation

Source: Boulder County assessment roll, as of September 18, 2026

Property Jurisdictions

Type	Name
State	Colorado
County	Boulder County
Municipality	Longmont City
Unified School District	St. Vrain Valley School District RE 1J (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$87,747 (+3.2%) Land $15,279 Building $72,468	$1,360,400 (-) Land $294,700 Building $1,065,700
2025	$8,269.00 (+13.17%)	$85,025 (-3.2%) Land $18,419 Building $66,606	$1,360,400 (+3.77%) Land $294,700 Building $1,065,700
2023	$7,307.00 (+15.13%)	$87,838 (+23.54%) Land $20,335 Building $67,503	$1,311,000 (+28.15%) Land $303,500 Building $1,007,500
2022	$6,347.00	$71,099 Land $14,602 Building $56,497	$1,023,000 Land $210,100 Building $812,900

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

Source: FEMA National Flood Hazard Layer, effective October 14, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	1 in force

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Low lower than 99.1% of the US · lower than 99.6% of Colorado
Wildfire Likelihood	Under 0.01% annual chance
Exposure	None beyond ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	CITY OF LONGMONT serves 104,178 people · EPA ID CO0107485
Water Source	Surface water
Last State Inspection	Sep 2025
Lead	2 ppb (2023–2025) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 488 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
NextLight Fiber	10,000 / 10,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
CenturyLink DSL · Fiber in parts of the area	140 / 20
T-Mobile Fixed Wireless	100 / 20

May also be available: Rise Broadband, TDS Telecom.

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