Boulder County property record for 4075 Nassau Pl, Boulder, CO 80301
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3.25 ba · 4,227 sqft · built 1999 |
| Lot Size | 0.22 acres (9,561 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $725,000 (May 2012) |
| Tax Bill | $10,290 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-17-4-27-002 |
| Primary APN | 1463-17-4-27-002 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3.25 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 12 Rooms |
| Stories | 2 Stories |
| Building Area | 4,227 sqft Living Area |
| Gross Area | 4,861 sqft |
| 1st Floor Area | 1,608 sqft |
| Upper Floors Area | 1,181 sqft |
| Basement Area | 1,598 sqft |
| Finished Basement | 1,438 sqft |
| Unfinished Basement | 160 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1999 |
|---|---|
| Effective Year Built | Effective 2004 |
| Architectural Style | A-Frame |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 9,561 sqft (0.22 acres) |
| Garage Type | Attached |
| Garage Area | 474 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Porch |
| Porch Area | 116 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0116623 |
|---|---|
| Street Address | 4075 NASSAU PL |
| City | BOULDER |
| State | CO |
| Zip | 80301-6029 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 21 BLK 1 FOUR MILE CREEK FLG 1 |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 17 |
| Legal Subdivision | FOUR MILE CREEK FLG 1 - BO |
| Legal Block | 1 |
| Legal Lot Number | 21 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3020 |
| Census Tract | 12701 |
4075 Nassau Pl is owned and occupied by two individuals who bought it in May 2012.
Source: Boulder County records, as of September 18, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4075 NASSAU PL, BOULDER, CO 80301-6029 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | May 31, 2012 · Amount on File |
| Deed Sale | May 31, 2012 · Amount on File |
| Prior Sale | Jul 8, 1999 · Amount on File |
| Deed Document Number | 20123226425 |
| Prior Transfer Date | Dec 21, 2007 |
| Prior Transfer Doc | 0002906685 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 4075 Nassau Pl was $10,290, up 8.5% from the year before.
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 | $112,662 (+4.39%) Land $33,245 Building $79,417 | $1,726,800 (-) Land $558,900 Building $1,167,900 | |
| 2025 | $10,290.00 (+8.54%) | $107,925 Land $34,931 Building $72,994 | $1,726,800 Land $558,900 Building $1,167,900 |
| 2024 | $9,480.00 (+1.76%) | ||
| 2023 | $9,316.00 (+9.14%) | $111,562 (+21.37%) Land $35,932 Building $75,630 | $1,665,100 (+25.9%) Land $536,300 Building $1,128,800 |
| 2022 | $8,536.00 | $91,921 Land $32,436 Building $59,485 | $1,322,600 Land $466,700 Building $855,900 |
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.
FEMA maps place 4075 Nassau Pl in Zone X, an area of minimal flood risk, though there have been 5 flood claims nearby since 1995.
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 |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 29 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 29 in force |
| Nearby Flood Claims | 5 (1995–2013) |
| Claims Outside the SFHA | 3 of 5 |
| Most Recent Claim | Sep 2013 · Severe Storms, 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.
Wildfire risk around 4075 Nassau Pl is moderate, ranking above 53% of the US, with a 0.2% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 53% of the US · lower than 62% of Colorado |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Indirect within ember reach |
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 190 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 |
| CenturyLink DSL | 140 / 20 |
May also be available: AT&T, T-Mobile, Verizon.
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