Boulder County property record for 315 S 40th St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 2,450 sqft · built 1956 |
| Lot Size | 0.16 acres (6,953 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $268,000 (Oct 2001) |
| Tax Bill | $4,781 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-05-4-22-037 |
| Primary APN | 1577-05-4-22-037 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Half Baths | 3 Half Baths |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 2,450 sqft Living Area |
| Gross Area | 2,904 sqft |
| 1st Floor Area | 1,152 sqft |
| Basement Area | 1,152 sqft |
| Finished Basement | 918 sqft |
| Unfinished Basement | 234 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1956 |
|---|---|
| Effective Year Built | Effective 1973 |
| Architectural Style | Ranch |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Lot Area | 6,953 sqft (0.16 acres) |
| Garage Type | Attached |
| Garage Area | 220 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Porch |
| Porch Area | 375 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0010215 |
|---|---|
| Street Address | 315 S 40TH ST |
| City | BOULDER |
| State | CO |
| Zip | 80305-5417 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 37 BLK 5 MARTIN ACRES 2 |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 05 |
| Legal Subdivision | MARTIN ACRES 2 - BO |
| Legal Block | 5 |
| Legal Lot Number | 37 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3006 |
| Census Tract | 12507 |
Source: Boulder County records, as of September 18, 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 | 315 S 40TH ST, BOULDER, CO 80305-5417 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Oct 4, 2001 · Amount on Record |
| Deed Sale | Oct 4, 2001 · Amount on Record |
| Prior Sale | Aug 14, 1979 |
| Deed Document Number | 20012204625 |
| Last Transfer Date | May 20, 2008 |
| Transfer Doc | 0002931344 |
| Record Updated | Oct 29, 2026 |
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 | $56,188 (+12.05%) Land $32,653 Building $23,535 | $896,300 (+11.72%) Land $550,200 Building $346,100 | |
| 2025 | $4,781.00 (+3.57%) | $50,144 (-12.24%) Land $34,388 Building $15,756 | $802,300 (-5.92%) Land $550,200 Building $252,100 |
| 2023 | $4,616.00 (+11.44%) | $57,138 (+28.08%) Land $40,294 Building $16,844 | $852,800 (+32.86%) Land $601,400 Building $251,400 |
| 2022 | $4,142.00 | $44,612 Land $29,885 Building $14,727 | $641,900 Land $430,000 Building $211,900 |
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.
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 |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 6 in force |
| Nearby Flood Claims | 7 (1979–2022) |
| Claims Outside the SFHA | 5 of 7 |
| Most Recent Claim | Jul 2022 · rainfall accumulation |
| 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 | Low lower than 80% of the US · lower than 91% of Colorado |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond 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 678 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Networks Fixed Wireless | 2,500 / 2,500 |
| CenturyLink Fiber · DSL in parts of the area | 2,000 / 1,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| LiveWireNet Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: AT&T.
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