Boulder County property record for 307 W William St, Superior, CO 80027
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,120 sqft · built 1966 |
| Lot Size | 0.323 acres (14,046 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $125,000 (Jun 1995) |
| Tax Bill | $3,820 (2025) |
| Deeds & Mortgages | Sep 2026 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-24-0-08-006 |
| Primary APN | 1577-24-0-08-006 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,120 sqft Living Area |
| Gross Area | 2,240 sqft |
| 1st Floor Area | 1,120 sqft |
| Basement Area | 1,120 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1966 |
|---|---|
| Effective Year Built | Effective 1966 |
| Architectural Style | Ranch |
| Exterior Material | Logs |
| Construction Type | Frame |
| Lot Area | 14,046 sqft (0.323 acres) |
| Garage Type | Detached |
| Garage Area | 672 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0029340 |
|---|---|
| Street Address | 307 W WILLIAM ST |
| City | SUPERIOR |
| State | CO |
| Zip | 80027-9647 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOTS 9 & 10 BLK D SUPERIOR |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 24 |
| Legal Subdivision | SUPERIOR & SOUTH - SP |
| Legal Block | D |
| Legal Lot Number | 9 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1022 |
| Census Tract | 60602 |
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 | Individual Name on Record |
|---|---|
| Mailing Address | 206 W MAPLE ST, LOUISVILLE, CO 80027-9640 |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jun 2, 1995 · Amount on Record |
| Deed Sale | Jun 2, 1995 · Amount on Record |
| Deed Document Number | 19951521281 |
| Last Transfer Date | Sep 1, 2026 |
| Transfer Doc | 0004146145 |
| Record Updated | Oct 29, 2026 |
| Document Type | Affidavit |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Sep 2, 2026 |
| Property Address | 307 W WILLIAM ST, SUPERIOR, CO 80027-9647 |
| Document Number | 0004146145 |
| Instrument Date | Sep 1, 2026 |
| Instrument | 20264146145 |
| Transaction Type | Transfer |
| Record Updated | Sep 11, 2026 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 206 W MAPLE ST, LOUISVILLE, CO 80027-9640 |
Source: Boulder County assessment roll, as of September 18, 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Municipality | Superior Town |
| Unified School District | Boulder Valley School District RE-2 (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $33,666 (-2.08%) Land $33,666 | $550,100 (-) Land $550,100 | |
| 2025 | $3,820.00 (+104.83%) | $34,381 (+56.73%) Land $34,381 | $550,100 (+68.02%) Land $550,100 |
| 2023 | $1,865.00 (+127.72%) | $21,936 (+182.94%) Land $21,936 | $327,400 (+193.5%) Land $327,400 |
| 2022 | $819.00 | $7,753 Land $7,753 | $111,550 Land $111,550 |
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.
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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 64% of the US · above 55% of Colorado |
|---|---|
| Wildfire Likelihood | 0.3% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
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 |
| 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.
Source: FCC Broadband Data Collection, based on 225 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| CenturyLink Fiber · DSL in parts of the area | 2,000 / 1,000 |
| LiveWireNet Fixed Wireless | 250 / 100 |
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