Boulder County property record for 405 S 45th St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 2 ba · 2,438 sqft · built 1957 |
| Lot Size | 0.184 acres (8,009 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $820,000 (Sep 2020) |
| Tax Bill | $6,475 (2025) |
| Deeds & Mortgages | Sep 2020 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-05-4-27-017 |
| Primary APN | 1577-05-4-27-017 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 2,438 sqft Living Area |
| Gross Area | 2,724 sqft |
| 1st Floor Area | 1,010 sqft |
| Upper Floors Area | 544 sqft |
| Basement Area | 884 sqft |
| Finished Basement | 884 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1957 |
|---|---|
| Effective Year Built | Effective 1990 |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Asphalt |
| Lot Area | 8,009 sqft (0.184 acres) |
| Garage Type | Attached |
| Garage Area | 286 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Porch |
| Porch Area | 266 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0012737 |
|---|---|
| Street Address | 405 S 45TH ST |
| City | BOULDER |
| State | CO |
| Zip | 80305-6047 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 17 BLK 10 MARTIN ACRES 2 |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 05 |
| Legal Subdivision | MARTIN ACRES 2 - BO |
| Legal Block | 10 |
| Legal Lot Number | 17 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3011 |
| 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 | 405 S 45TH ST, BOULDER, CO 80305-6047 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Sep 29, 2020 · Amount on Record |
| Deed Sale | Sep 29, 2020 · Amount on Record |
| Prior Sale | Aug 22, 2013 · Amount on Record |
| Deed Document Number | 20203819070 |
| Prior Transfer Date | Mar 16, 2009 |
| Prior Transfer Doc | 0002987693 |
| Record Updated | Oct 29, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Sep 29, 2020 |
| Property Address | 405 S 45TH ST, BOULDER, CO 80305-6047 |
| Document Number | 0003819070 |
| Instrument Date | Sep 23, 2020 |
| Instrument | 3819070 |
| Transaction Type | Transfer |
| Record Updated | Mar 31, 2022 |
| Title Company | HERITAGE TITLE CO |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $82.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 405 S 45TH ST, BOULDER, CO 80305-6047 |
| Document Number | 0003819071 |
|---|---|
| Date | Sep 29, 2020 |
| Instrument | 3819071 |
| Name | NEST HOME LENDING LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Oct 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 | $69,129 (+1.79%) Land $35,394 Building $33,735 | $1,086,600 (-) Land $590,500 Building $496,100 | |
| 2025 | $6,475.00 (+0.68%) | $67,912 (-13.11%) Land $36,906 Building $31,006 | $1,086,600 (-6.86%) Land $590,500 Building $496,100 |
| 2023 | $6,431.00 (+13.84%) | $78,162 (+28.47%) Land $43,242 Building $34,920 | $1,166,600 (+33.26%) Land $645,400 Building $521,200 |
| 2022 | $5,649.00 | $60,840 Land $32,074 Building $28,766 | $875,400 Land $461,500 Building $413,900 |
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 | 0.03% 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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