103 W William St, Superior (Louisville), CO 80027 Property Records

Boulder County property record for 103 W William St, Superior, CO 80027

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 696 sqft · built 1915
Lot Size	0.175 acres (7,608 sqft)
Owner	Company Name on File
Last Sale	$440,000 (Sep 2025)
Tax Bill	$2,618 (2025)
Deeds & Mortgages	Dec 2025 Construction Loan Sep 2025 Sale + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1577-24-0-10-010`

Property Details

APN / Parcel Number

Primary APN	`1577-24-0-10-010`
Alternative APN	`R0512461`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	4 Rooms
Stories	1 Story
Building Area	696 sqft Living Area
1st Floor Area	696 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1915
Effective Year Built	Effective 1940
Architectural Style	Ranch
Exterior Material	Wood Shingle
Construction Type	Frame
Roof Material	Asphalt
Lot Area	7,608 sqft (0.175 acres)
Garage Type	Detached
Garage Area	660 sqft
Parking Spaces	2 Parking Spaces
Porch	Porch
Porch Area	24 sqft
Total Buildings	2 Buildings

Utilities, Heating & Cooling

Heating System	Gravity Furnace

Location & Zoning

Account Number	R0512461
Street Address	103 W WILLIAM ST
City	SUPERIOR
State	CO
Zip	80027-9643
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 11 BLK B SUPERIOR
Legal Range	70
Legal Township	1S
Legal Section	24
Legal Subdivision	SUPERIOR & SOUTH - SP
Legal Block	B
Legal Lot Number	11
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	1
Census Block	1039
Census Tract	60602

Owner

103 W William St is owned by a company that bought it in September 2025.

Source: Boulder County records, as of September 18, 2026

Owner of Record	Company Name on File
Mailing Address	PO BOX 462441, AURORA, CO 80046-2441
Owner Type	Company
Vesting	Limited Liability Partnership

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Date	Document
Dec 8, 2025	Deed of Trust, Mortgage · Construction Mortgage BANK OF COLORADO
Sep 11, 2025	Warranty Deed, Transfer WFT NATIONAL TITLE, WFG NATIONAL TITLE
Nov 3, 2022	Special Warranty Deed, Transfer · Conventional Mortgage HIGGS BOSON HOLDING CO

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Sep 11, 2025 · Amount on File
Deed Sale	Sep 11, 2025 · Amount on File
Prior Sale	Jul 27, 2023 · Amount on File
Deed Document Number	20254101826
Prior Transfer Date	May 1, 2012
Prior Transfer Doc	0003222419
Record Updated	Oct 29, 2026

December 2025: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	103 W WILLIAM ST, SUPERIOR, CO 80027-9643
Transaction Type	Mortgage
Record Updated	Dec 22, 2025

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	21991 E STANFORD DR, AURORA, CO 80015-4743

Mortgage

Document Number	0004112372
Date	Dec 8, 2025
Instrument	4112372

Lender

Name	BANK OF COLORADO
Type	Bank
Address	FORT LUPTON, CO 80621

Agreement

Type	Construction Mortgage
Amount	Amount on Record
Term	15 Months
Due	Mar 4, 2027

Interest

Rate Type	Adjustable Rate

September 2025: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Sep 11, 2025
Property Address	103 W WILLIAM ST, SUPERIOR, CO 80027-9643
Document Number	0004101826
Instrument Date	Sep 11, 2025
Instrument	4101826
Transaction Type	Transfer
Record Updated	Sep 29, 2025
Title Company	WFT NATIONAL TITLE, WFG NATIONAL TITLE

Transaction

Amount	Amount on Record
Tax	$44.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	PO BOX 462441, AURORA, CO 80046-2441

November 2022: Special Warranty Deed, Transfer

Document Type	Special Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Nov 3, 2022
Property Address	103 W WILLIAM ST, SUPERIOR, CO 80027-9643
Document Number	0003987711
Instrument Date	Nov 1, 2022
Instrument	3987711
Transaction Type	Transfer
Record Updated	Sep 29, 2025
Title Company	LAND TITLE GUARANTY COMPANY IN, LAND TITLE GUARANTEE CO

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$27.50
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	643 MAPLETON AVE, BOULDER, CO 80304-3989

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	200 S WILCOX CASTLE, CASTLE ROCK, CO 80104

Mortgage

Document Number	0003987712
Date	Nov 3, 2022
Instrument	3987712

Lender

Name	HIGGS BOSON HOLDING CO
Type	Non-Lending Institution

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	18 Months
Due	May 1, 2024

Tax Assessment & Valuation

The 2025 property tax bill for 103 W William St was $2,618, up 102.8% from the year before.

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

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$23,079 (-2.08%) Land $23,079	$377,100 (-) Land $377,100
2025	$2,618.00 (+102.79%)	$23,569 (+89.13%) Land $23,569	$377,100 (+56.47%) Land $377,100
2024	$1,291.00 (+1.41%)	$12,462 (-22.82%) Land $12,462	$241,000 (-) Land $241,000
2023	$1,273.00 (+111.46%)	$16,147 (+182.98%) Land $16,147	$241,000 (+193.54%) Land $241,000
2022	$602.00	$5,706 Land $5,706	$82,100 Land $82,100

Assessed value is set for property tax purposes, not a market price estimate; it is a fraction of this property's market value.

Flood

FEMA maps place 103 W William St in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.

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
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	3 in force
Nearby Flood Claims	1 (2013)
Most Recent Claim	Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides

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

Wildfire risk around 103 W William St is high, ranking above 73% of the US, with a 0.4% annual chance of wildfire.

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

Wildfire Risk	High above 73% of the US · above 70% of Colorado
Wildfire Likelihood	0.4% annual chance
Exposure	Direct burnable vegetation

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	SUPERIOR MD NO 1 serves 17,900 people · EPA ID CO0107725
Water Source	Surface water
Last State Inspection	Feb 2025
Lead	Under 1 ppb (2023–2025) action level 15 ppb

Violations Reported to EPA

Water Quality	Treatment failure resolved · Dec 2021
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 126 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable · Fiber in parts of the area	2,000 / 2,000
T-Mobile Fixed Wireless	100 / 20

May also be available: CenturyLink, LiveWireNet.

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