875 Union Ave, Boulder, CO 80304 Property Records

Boulder County property record for 875 Union Ave, Boulder, CO 80304

Property Summary

Property Type	Single Family Home
Details	3 bd · 1.75 ba · 1,576 sqft · built 1992
Lot Size	0.163 acres (7,088 sqft)
Owner	Company Name on File
Last Sale	$225,200 (Jan 1993)
Tax Bill	$8,744 (2025)
Deeds & Mortgages	May 2026 Sale
Flood Zone	Zone X (minimal risk)
APN	`1461-13-1-31-001`

Property Details

APN / Parcel Number

Primary APN	`1461-13-1-31-001`
Alternative APNs	`R0034069` `0034069`

Interior

Bedrooms	3 Beds
Full Baths	1.75 Baths
Half Baths	1 Half Bath
Total Rooms	6 Rooms
Stories	2 Stories
Building Area	1,576 sqft Living Area
Gross Area	2,852 sqft
1st Floor Area	876 sqft
Upper Floors Area	700 sqft
Basement Area	876 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1992
Effective Year Built	Effective 1994
Exterior Material	Brick Veneer
Construction Type	Frame
Lot Area	7,088 sqft (0.163 acres)
Garage Type	Attached
Garage Area	400 sqft
Parking Spaces	2 Parking Spaces
Porch	Porch
Porch Area	40 sqft
Deck Area	80 sqft

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0034069
Street Address	875 UNION AVE
City	BOULDER
State	CO
Zip	80304-0708
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 1 GRANT
Legal Range	71
Legal Township	1N
Legal Section	13
Legal Subdivision	GRANT SUBDIVISION - BO
Legal Block	1
Legal Lot Number	1
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	1
Census Block	1008
Census Tract	12104

Owner

Source: Boulder County records · APN 1461-13-1-31-001

Assessment roll updated June 15, 2026 · Last verified June 2026

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

Owner of Record	Company Name on File
Mailing Address	875 UNION AVE, BOULDER, CO 80304-0708
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Family Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Jan 04, 1993 · Amount on Record
Deed Sale	Jan 04, 1993 · Amount on Record
Prior Sale	Sep 01, 1992
Deed Document Number	19931253947
Last Transfer Date	May 21, 2026
Transfer Doc	0004133275
Record Updated	Sep 20, 2026

May 2026: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	May 26, 2026
Property Address	875 UNION AVE, BOULDER, CO 80304-0708
Document Number	0004133275
Instrument Date	May 21, 2026
Instrument	20264133275
Transaction Type	Transfer
Record Updated	Jul 12, 2026
Title Company	NONE LISTED ON DOCUMENT

Transaction

Tax	$0.00
Amount Accuracy	Full Amount Stated

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Family Trust
Address	875 UNION AVE, BOULDER, CO 80304-0708

Tax Assessment & Valuation

Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified June 2026

Property Jurisdictions

Type	Name
State	Colorado
County	Boulder County
Municipality	Boulder City
Unified School District	Boulder Valley School District RE-2 (PK - 12)

Tax Bill & Assessment History

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.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$99,776 (+8.8%) Land $68,224 Building $31,552	$1,467,300 (-) Land $1,003,300 Building $464,000
2025	$8,744.00 (-0.22%)	$91,706 (-12.79%) Land $62,706 Building $29,000	$1,467,300 (-6.51%) Land $1,003,300 Building $464,000
2023	$8,763.00 (+21.14%)	$105,157 (+34.98%) Land $68,434 Building $36,723	$1,569,500 (+40.02%) Land $1,021,400 Building $548,100
2022	$7,234.00	$77,903 Land $54,829 Building $23,074	$1,120,900 Land $788,900 Building $332,000

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of October 14, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 58 individual policies
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	63 units insured incl. 5 condo units
Nearby Flood Claims	14 (2013–2015)
Claims Outside the SFHA	6 of 14
Most Recent Claim	May 2015 · Severe Storms, Tornadoes, Flooding, Landslides, And Mudslides
Claims by Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 13 claims

Wildfire

Wildfire Risk	Moderate above 64% of the US · above 54% of Colorado
Wildfire Likelihood	0.2% annual chance
Exposure	Indirect within ember reach

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.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Ayva Fixed Wireless	2,500 / 2,500
Xfinity Cable	2,000 / 250
Live Wire Networks Fixed Wireless	250 / 100
T-Mobile USA Fixed Wireless	100 / 20

May also be available: AT&T, Lumen Technologies.

Based on FCC filings for 460 locations within half a mile of this property.

Cell Coverage

5G (outdoors only) and 4G LTE

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	CITY OF BOULDER serves 166,080 people
Water Source	Surface water
Last State Inspection	Sep 2024
Lead	2 ppb (2023–2025) action level 15 ppb

Violations Reported to EPA

Water Quality	Haloacetic acids resolved · Jul 2017
Treatment and Procedure	None last 10 years
Monitoring and Reporting	1 last 3 years

Results are for the whole water system as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.