Boulder County property record for 340 S 40th St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.25 ba · 2,043 sqft · built 1956 |
| Lot Size | 0.168 acres (7,318 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $704,900 (Dec 2020) |
| Tax Bill | $5,520 (2025) |
| Deeds & Mortgages | Dec 2020 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-05-4-23-009 |
| Primary APN | 1577-05-4-23-009 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.25 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 2,043 sqft Living Area |
| Gross Area | 2,524 sqft |
| 1st Floor Area | 1,152 sqft |
| Basement Area | 1,152 sqft |
| Finished Basement | 891 sqft |
| Unfinished Basement | 261 sqft |
| Year Built | Built 1956 |
|---|---|
| Effective Year Built | Effective 1988 |
| Architectural Style | Ranch |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Lot Area | 7,318 sqft (0.168 acres) |
| Garage Type | Attached |
| Garage Area | 220 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Porch |
| Porch Area | 288 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0012141 |
|---|---|
| Street Address | 340 S 40TH ST |
| City | BOULDER |
| State | CO |
| Zip | 80305-5418 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 9 BLK 6 MARTIN ACRES 2 |
| Legal Subdivision | MARTIN ACRES 2 - BO |
| Legal Block | 6 |
| Legal Lot Number | 9 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3007 |
| 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 | 2 Individual Names on Record |
|---|---|
| Mailing Address | 340 S 40TH ST, BOULDER, CO 80305-5418 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 3, 2020 · Amount on Record |
| Deed Sale | Dec 3, 2020 · Amount on Record |
| Prior Sale | Apr 15, 1992 · Amount on Record |
| Deed Document Number | 20203838470 |
| Prior Transfer Date | Oct 22, 1996 |
| Prior Transfer Doc | 0001656561 |
| Record Updated | Oct 29, 2026 |
| Document Type | Special Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Dec 3, 2020 |
| Property Address | 340 S 40TH ST, BOULDER, CO 80305-5418 |
| Document Number | 0003838470 |
| Instrument Date | Nov 30, 2020 |
| Instrument | 3838470 |
| Transaction Type | Transfer |
| Record Updated | Mar 31, 2022 |
| Title Company | LAND TITLE GUARANTEE CO |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $70.49 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 340 S 40TH ST, 340, BOULDER, CO 80305-5418 |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 340 SOUTH 40TH STREET, ATLANTA, GA 30305 |
| Document Number | 0003838471 |
|---|---|
| Date | Dec 3, 2020 |
| Instrument | 3838471 |
| Name | ELEVATIONS CU |
|---|---|
| Type | Credit Union |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Dec 1, 2050 |
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 | $58,228 (+0.58%) Land $33,619 Building $24,609 | $926,300 (-) Land $564,400 Building $361,900 | |
| 2025 | $5,520.00 (+3.2%) | $57,894 (-11.79%) Land $35,275 Building $22,619 | $926,300 (-5.44%) Land $564,400 Building $361,900 |
| 2023 | $5,349.00 (+20.26%) | $65,633 (+37.02%) Land $41,339 Building $24,294 | $979,600 (+42.14%) Land $617,000 Building $362,600 |
| 2022 | $4,448.00 | $47,899 Land $30,656 Building $17,243 | $689,200 Land $441,100 Building $248,100 |
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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