Boulder County property record for 4145 Riverside Ave, Boulder, CO 80304
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1.75 ba · 1,068 sqft · built 1983 |
| Lot Size | 0.048 acres (2,088 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $807,000 (May 2022) |
| Tax Bill | $4,612 (2025) |
| Deeds & Mortgages | May 2022 Sale & Mortgage Sep 2021 Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-18-3-35-002 |
| Primary APN | 1463-18-3-35-002 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1.75 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 5 Rooms |
| Stories | 2 Stories |
| Building Area | 1,068 sqft Living Area |
| Gross Area | 1,248 sqft |
| 1st Floor Area | 416 sqft |
| Upper Floors Area | 416 sqft |
| Basement Area | 236 sqft |
| Finished Basement | 236 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1983 |
|---|---|
| Effective Year Built | Effective 1993 |
| Architectural Style | A-Frame |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 2,088 sqft (0.048 acres) |
| Garage Type | Attached |
| Garage Area | 180 sqft |
| Deck Area | 92 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0094446 |
|---|---|
| Street Address | 4145 RIVERSIDE AVE |
| City | BOULDER |
| State | CO |
| Zip | 80304-1127 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 29B WILDWOOD REPLAT B |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 18 |
| Legal Subdivision | WILDWOOD REPLAT B - BO |
| Legal Block | 3 |
| Legal Lot Number | 29B |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3001 |
| Census Tract | 12105 |
Source: Boulder County records · APN 1463-18-3-35-002
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 | 2 Individual Names on File |
|---|---|
| Mailing Address | 4145 RIVERSIDE AVE, BOULDER, CO 80304-1127 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| May 31, 2022 | Warranty Deed, Transfer · Conventional Mortgage CROSSCOUNTRY MORTGAGE LLC |
| Sep 01, 2021 | Deed of Trust, Mortgage · Conventional Mortgage FIRST MIDWEST BANK |
| Nov 12, 2019 | Warranty Deed, Transfer · Conventional Mortgage FIRST MIDWEST BANK |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | May 31, 2022 · Amount on Record |
| Deed Sale | May 31, 2022 · Amount on Record |
| Prior Sale | Nov 12, 2019 · Amount on Record |
| Deed Document Number | 20223964479 |
| Record Updated | Sep 20, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | May 31, 2022 |
| Property Address | 4145 RIVERSIDE AVE, BOULDER, CO 80304-1127 |
| Document Number | 0003964479 |
| Instrument Date | May 25, 2022 |
| Instrument | 3964479 |
| Transaction Type | Transfer |
| Record Updated | Jun 14, 2022 |
| Title Company | LAND TITLE GUARANTEE |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $80.70 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 4145 INTERSTATE NORTH PKWY, 4145, ATLANTA, GA 30328 |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 4145 INTERSTATE NORTH PKWY, ATLANTA, GA 30328 |
| Document Number | 0003964480 |
|---|---|
| Date | May 31, 2022 |
| Instrument | 3964480 |
| Name | CROSSCOUNTRY MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jun 01, 2052 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 4145 RIVERSIDE AVE, BOULDER, CO 80304-1127 |
| Transaction Type | Mortgage |
| Record Updated | Sep 16, 2021 |
| Title Company | FIRST NATIONAL TITLE COMPANY, FIRST NATIONAL TITLE CO |
| Name | Verified Name |
|---|---|
| Address | 4145 RIVERSIDE AVE, BOULDER, CO 80304-1127 |
| Document Number | 0003911298 |
|---|---|
| Date | Sep 01, 2021 |
| Instrument | 3911298 |
| Name | FIRST MIDWEST BANK |
|---|---|
| Type | Bank |
| Address | GURNEE, IL 60031 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 180 Months |
| Due | Sep 01, 2036 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Nov 12, 2019 |
| Property Address | 4145 RIVERSIDE AVE, BOULDER, CO 80304-1127 |
| Document Number | 0003748131 |
| Instrument Date | Nov 08, 2019 |
| Instrument | 3748131 |
| Transaction Type | Transfer |
| Record Updated | Mar 31, 2022 |
| Title Company | LAND TITLE GUARANTEE CO |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $61.60 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 4145 RIVERSIDE AVE, 4145, BOULDER, CO 80304-1127 |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 4145 RIVERSIDE AVE, BOULDER, CO 80304-1127 |
| Document Number | 0003748132 |
|---|---|
| Date | Nov 12, 2019 |
| Instrument | 3748132 |
| Name | FIRST MIDWEST BANK |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Dec 01, 2049 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 3.47% |
| Adjustable | Adjustable Rate Rider |
| Type Change Date | Dec 01, 2034 |
| Change Frequency | Annually |
| Min Rate At Change | 2.25% |
| Max Rate At Change | 8.47% |
| Index | 1-Year LIBOR |
| Max Rate | 8.47% |
Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified June 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Municipality | Boulder City |
| Unified School District | Boulder Valley School District RE-2 (PK - 12) |
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 | $52,632 (+8.8%) Land $23,310 Building $29,322 | $774,000 (-) Land $342,800 Building $431,200 | |
| 2025 | $4,612.00 (+5.34%) | $48,375 (-11.06%) Land $21,425 Building $26,950 | $774,000 (-4.66%) Land $342,800 Building $431,200 |
| 2023 | $4,378.00 (+12.2%) | $54,391 (+29.42%) Land $22,117 Building $32,274 | $811,800 (+34.25%) Land $330,100 Building $481,700 |
| 2022 | $3,902.00 | $42,027 Land $17,924 Building $24,103 | $604,700 Land $257,900 Building $346,800 |
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
| 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 32 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 32 in force |
| Nearby Flood Claims | 26 (2005–2015) |
| Claims Outside the SFHA | 10 of 26 |
| Most Recent Claim | May 2015 · Severe Storms, Tornadoes, Flooding, Landslides, And Mudslides |
| Claims by Event |
|
| Wildfire Risk | Moderate above 46% of the US · lower than 71% of Colorado |
|---|---|
| Wildfire Likelihood | 0.08% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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: 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.
5G (outdoors only) and 4G LTE
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 |
| 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.
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