428 Bison Dr, Boulder, CO 80302 Property Records

Boulder County property record for 428 Bison Dr, Boulder, CO 80302

Property Summary

Property Type	Single Family Home
Details	2 bd · 1.75 ba · 2,190 sqft · built 1977
Lot Size	37.2 acres (1,620,964 sqft)
Owner	2 Individuals on Record
Last Sale	$1,450,000 (Jul 2024)
Tax Bill	$6,830 (2025)
Deeds & Mortgages	Jan 2021 Line of Credit Jul 2018 Sale
Flood Zone	Zone X (minimal risk)
APN	`1579-00-0-00-024`

Property Details

APN / Parcel Number

Primary APN	`1579-00-0-00-024`
Alternative APNs	`R0026554` `0026554`

Interior

Bedrooms	2 Beds
Full Baths	1.75 Baths
Half Baths	1 Half Bath
Total Rooms	4 Rooms
Stories	1 Story
Building Area	2,190 sqft Living Area
1st Floor Area	1,034 sqft
Upper Floors Area	401 sqft
Basement Area	755 sqft
Finished Basement	755 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1977
Effective Year Built	Effective 2010
Architectural Style	A-Frame
Exterior Material	Wood Shingle
Construction Type	Frame
Roof Material	Metal
Lot Area	1,620,964 sqft
Deck Area	142 sqft
Total Buildings	2 Buildings

Utilities, Heating & Cooling

Heating Fuel	Electric

Location & Zoning

Account Number	R0026554
Street Address	428 BISON DR
City	BOULDER
State	CO
Zip	80302-9525
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	F
Legal Description	PT N 1/2 NW 1/4 23-1S-71 INCLUDING RECTANGLE 80 FT X 206.77 FT PER REC 608617 35.85 ACS M/L
Legal Range	71
Legal Township	1S
Legal Section	23
Legal Subdivision	TR, NBR 910 WALKER RANCH AREA
Legal Block	4
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	4
Census Block	4010
Census Tract	12510

Historic Designation

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

Historic District	Within the Walker Ranch Historic District listed 1984 · 23 contributing resources · NRIS 84000798

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

Owner

Source: Boulder County assessment roll, as of June 15, 2026

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

Owner of Record	2 Individuals on Record
Mailing Address	3055 HOLLYCREST DR, COLORADO SPRINGS, CO 80920-3030
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Jan 14, 2021	Deed of Trust, Mortgage · Line of Credit LEDYARD NATIONAL BANK
Jul 18, 2018	Warranty Deed, Transfer HERITAGE TITLE COMPANY

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jul 11, 2024 · Amount on Record
Deed Sale	Jul 11, 2024 · Amount on Record
Prior Sale	Jul 18, 2018 · Amount on Record
Deed Document Number	20244053231
Prior Transfer Date	Jun 24, 2015
Prior Transfer Doc	0003455584
Record Updated	Sep 20, 2026

January 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	428 BISON DR, BOULDER, CO 80302-9525
Transaction Type	Mortgage
Record Updated	Feb 8, 2021
Title Company	FIRST AMERICAN TITLE INS CO

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003850560
Date	Jan 14, 2021
Instrument	3850560

Lender

Name	LEDYARD NATIONAL BANK
Type	Bank
Address	HANOVER, NH 03755

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

July 2018: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Jul 18, 2018
Property Address	428 BISON DR, BOULDER, CO 80302-9525
Document Number	0003666532
Instrument Date	Jul 17, 2018
Instrument	3666532
Transaction Type	Transfer
Record Updated	Jul 25, 2018
Title Company	HERITAGE TITLE COMPANY

Transaction

Amount	Amount Recorded
Tax	$69.50
Amount Accuracy	Confirmed
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	153 RIBBETT WAY WOODSTOCK VT 050917982, WOODSTOCK, VT 05091-7982

Tax Assessment & Valuation

Source: Boulder County assessment roll, as of June 15, 2026

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$74,277 (+8.8%) Land $24,732 Building $49,545	$1,092,300 (-) Land $363,700 Building $728,600
2025	$6,830.00 (+5.99%)	$68,269 (-8.3%) Land $22,731 Building $45,538	$1,092,300 (-1.7%) Land $363,700 Building $728,600
2023	$6,444.00 (+22.6%)	$74,451 (+38.33%) Land $30,070 Building $44,381	$1,111,200 (+43.49%) Land $448,800 Building $662,400
2022	$5,256.00	$53,821 Land $18,133 Building $35,688	$774,400 Land $260,900 Building $513,500

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
Flood Insurance Cost	Premium on Record median of 33 policies
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	33 in force
Nearby Flood Claims	14 (1995–2013)
Claims Outside the SFHA	8 of 14
Most Recent Claim	Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides
Claims by Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 11 claims

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	Extreme above 96% of the US · above 98.9% of Colorado
Wildfire Likelihood	1% annual chance
Exposure	Direct burnable vegetation

Insurers in high-risk areas may require mitigation or decline coverage; check availability before making an offer.

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

Internet Providers

Source: FCC Broadband Data Collection, based on 1 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Starlink Satellite	280 / 30
Rise Broadband Fixed Wireless	50 / 10

Cell Coverage

No cell data coverage reported

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