Boulder County property record for 4120 Riverside Ave, Boulder, CO 80304
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 2.75 ba · 1,969 sqft · built 1982 |
| Lot Size | 0.076 acres (3,302 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,006,000 (Jul 2025) |
| Tax Bill | $6,723 (2025) |
| Deeds & Mortgages | Nov 2020 Mortgage May 2017 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-18-3-25-021 |
| Primary APN | 1463-18-3-25-021 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2.75 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 1,969 sqft Living Area |
| 1st Floor Area | 597 sqft |
| Upper Floors Area | 220 sqft |
| Basement Area | 576 sqft |
| Finished Basement | 576 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1982 |
|---|---|
| Effective Year Built | Effective 1990 |
| Architectural Style | A-Frame |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 3,302 sqft (0.076 acres) |
| Garage Type | Detached |
| Garage Area | 220 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Porch |
| Porch Area | 108 sqft |
| Deck Area | 132 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0087570 |
|---|---|
| Street Address | 4120 RIVERSIDE AVE |
| City | BOULDER |
| State | CO |
| Zip | 80304-1128 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 21 WILDWOOD |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 18 |
| Legal Subdivision | WILDWOOD & REPLT A - BO |
| Legal Block | 3 |
| Legal Lot Number | 21 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3002 |
| Census Tract | 12105 |
Source: Boulder County records, as of September 18, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4120 RIVERSIDE AVE, BOULDER, CO 80304-1128 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Nov 20, 2020 | Deed of Trust, Mortgage · Conventional Mortgage JPMORGAN CHASE BANK NA |
| May 5, 2017 | Warranty Deed, Transfer · Conventional Mortgage JPMORGAN CHASE BANK NA |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 24, 2025 · Amount on File |
| Deed Sale | Jul 24, 2025 · Amount on File |
| Prior Sale | May 5, 2017 · Amount on File |
| Deed Document Number | 20254096149 |
| Prior Transfer Date | Sep 18, 2013 |
| Prior Transfer Doc | 0003346107 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 4120 RIVERSIDE AVE, BOULDER, CO 80304-1128 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0003835080 |
|---|---|
| Date | Nov 20, 2020 |
| Instrument | 3835080 |
| Name | JPMORGAN CHASE BANK NA |
|---|---|
| Type | Bank |
| Address | COLUMBUS, OH 43240 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Dec 1, 2050 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | May 5, 2017 |
| Property Address | 4120 RIVERSIDE AVE, BOULDER, CO 80304-1128 |
| Document Number | 0003590601 |
| Instrument Date | May 2, 2017 |
| Instrument | 3590601 |
| Transaction Type | Transfer |
| Record Updated | Mar 31, 2022 |
| Title Company | LAND TITLE GUARANTEE CO |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $82.50 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 00000 |
| Name | Verified Name |
|---|---|
| Address | PO BOX 1294, LYONS, CO 80540-1294 |
| Document Number | 0003590602 |
|---|---|
| Date | May 5, 2017 |
| Instrument | 3590602 |
| Name | JPMORGAN CHASE BANK NA |
|---|---|
| Type | Bank |
| Address | COLUMBUS, OH 43240 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jun 1, 2047 |
Source: Boulder County assessment roll, as of September 18, 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Municipality | Boulder City |
| Unified School District | Boulder Valley School District RE-2 (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $71,040 (+1.97%) Land $28,581 Building $42,459 | $1,114,700 (-) Land $490,300 Building $624,400 | |
| 2025 | $6,723.00 (+1.4%) | $69,669 (-13.42%) Land $30,644 Building $39,025 | $1,114,700 (-7.19%) Land $490,300 Building $624,400 |
| 2023 | $6,630.00 (+15.2%) | $80,467 (+29.83%) Land $32,508 Building $47,959 | $1,201,000 (+34.67%) Land $485,200 Building $715,800 |
| 2022 | $5,755.00 | $61,980 Land $26,431 Building $35,549 | $891,800 Land $380,300 Building $511,500 |
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.
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 |
| Flood Insurance Cost | Premium on File 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 |
|
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 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 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 | CITY OF BOULDER serves 166,080 people · EPA ID CO0107152 |
|---|---|
| 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, 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 460 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Networks Fixed Wireless | 2,500 / 2,500 |
| Xfinity Cable | 2,000 / 250 |
| LiveWireNet Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: AT&T, CenturyLink.
5G (outdoors only) and 4G LTE
Search by:
By searching, you agree to: Terms • Privacy • Disclosures