Boulder County property record for 3145 4th St, Boulder, CO 80304
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1.5 ba · 1,400 sqft · built 1962 |
| Lot Size | 0.144 acres (6,255 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $109,500 (Jul 1984) |
| Tax Bill | $7,069 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1461-24-3-08-018 |
| Primary APN | 1461-24-3-08-018 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,400 sqft Living Area |
| Gross Area | 1,652 sqft |
| 1st Floor Area | 1,400 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1962 |
|---|---|
| Effective Year Built | Effective 1970 |
| Architectural Style | Ranch |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Other |
| Lot Area | 6,255 sqft (0.144 acres) |
| Garage Type | Attached |
| Garage Area | 252 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Porch |
| Porch Area | 236 sqft |
| Heating System | Hot Water |
|---|
| Account Number | R0004421 |
|---|---|
| Street Address | 3145 4TH ST |
| City | BOULDER |
| State | CO |
| Zip | 80304-2544 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOTS 37-38 BLK 44 NEWLANDS |
| Legal Range | 71 |
| Legal Township | 1N |
| Legal Section | 24 |
| Legal Subdivision | NEWLANDS - BO |
| Legal Block | 44 |
| Legal Lot Number | 37 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3010 |
| Census Tract | 12101 |
Source: Boulder County records · APN 1461-24-3-08-018
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 | 3145 4TH ST, BOULDER, CO 80304-2544 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Jul 31, 1984 · Amount on Record |
| Deed Sale | Jul 31, 1984 · Amount on Record |
| Prior Sale | Apr 23, 1981 · Amount on Record |
| Deed Document Number | 1984637193 |
| Record Updated | Sep 20, 2026 |
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 and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $87,469 (+8.8%) Land $78,722 Building $8,747 | $1,286,300 (-) Land $1,157,670 Building $128,630 | |
| 2025 | $7,069.00 (+0.08%) | $80,393 (-12.79%) Land $72,354 Building $8,039 | $1,286,300 (-6.51%) Land $1,157,670 Building $128,630 |
| 2023 | $7,063.00 (+22.39%) | $92,179 (+33.41%) Land $82,961 Building $9,218 | $1,375,800 (+38.38%) Land $1,238,220 Building $137,580 |
| 2022 | $5,771.00 | $69,097 Land $62,187 Building $6,910 | $994,200 Land $894,780 Building $99,420 |
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 |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 14 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 14 in force |
| Nearby Flood Claims | 4 (1995–2013) |
| Claims Outside the SFHA | 4 of 4 |
| Most Recent Claim | Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides |
| Claims by Event |
|
| Wildfire Risk | High above 77% of the US · above 78% of Colorado |
|---|---|
| Wildfire Likelihood | 0.6% annual chance |
| Exposure | Direct burnable vegetation at the parcel |
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 |
| Lumen Technologies Fiber | 2,000 / 1,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| Live Wire Networks Fixed Wireless | 250 / 100 |
May also be available: T-Mobile USA.
Based on FCC filings for 431 locations within half a mile of this property.
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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