Boulder County property record for 640 S 44th St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.25 ba · 2,319 sqft · built 1959 |
| Lot Size | 0.166 acres (7,210 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $896,200 (Nov 2024) |
| Tax Bill | $5,757 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-08-1-03-010 |
| Primary APN | 1577-08-1-03-010 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.25 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 2,319 sqft Living Area |
| Gross Area | 2,718 sqft |
| 1st Floor Area | 1,323 sqft |
| Basement Area | 1,107 sqft |
| Finished Basement | 996 sqft |
| Unfinished Basement | 111 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1959 |
|---|---|
| Effective Year Built | Effective 1990 |
| Architectural Style | Ranch |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Asphalt |
| Lot Area | 7,210 sqft (0.166 acres) |
| Garage Type | Attached |
| Garage Area | 288 sqft |
| Parking Spaces | 1 Parking Space |
| Deck Area | 216 sqft |
| Patio Area | 615 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0013614 |
|---|---|
| Street Address | 640 S 44TH ST |
| City | BOULDER |
| State | CO |
| Zip | 80305-6022 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 10 BLK 3 MARTIN ACRES 3 |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 05 |
| Legal Subdivision | MARTIN ACRES 3 - BO |
| Legal Block | 3 |
| Legal Lot Number | 10 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3001 |
| Census Tract | 12508 |
640 S 44th St is owned and occupied by two individuals who bought it in November 2024.
Source: Boulder County records, as of September 18, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 640 S 44TH ST, BOULDER, CO 80305-6022 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
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 | Nov 21, 2024 · Amount on File |
| Deed Sale | Nov 21, 2024 · Amount on File |
| Prior Sale | Jun 12, 1984 |
| Deed Document Number | 20244068084 |
| Prior Transfer Date | Nov 20, 2024 |
| Prior Transfer Doc | 0004068083 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 640 S 44th St was $5,757.
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 | $62,941 (+4.24%) Land $27,717 Building $35,224 | $995,600 (+3.05%) Land $477,600 Building $518,000 | |
| 2025 | $5,757.00 | $60,381 Land $29,850 Building $30,531 | $966,100 Land $477,600 Building $488,500 |
| 2023 | $5,611.00 (+30.76%) | $68,923 (+30.78%) Land $35,276 Building $33,647 | $1,028,700 (+35.66%) Land $526,500 Building $502,200 |
| 2022 | $4,291.00 | $52,702 Land $26,257 Building $26,445 | $758,300 Land $377,800 Building $380,500 |
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.
FEMA maps place 640 S 44th St in Zone X, an area of minimal flood risk.
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 | 5 in force |
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 640 S 44th St is low, with a 0.04% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 67% of the US · lower than 84% of Colorado |
|---|---|
| Wildfire Likelihood | 0.04% 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 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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