Boulder County property record for 525 S 45th St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3.25 ba · 1,807 sqft · built 1958 |
| Lot Size | 0.161 acres (7,009 sqft) |
| Owner | Company Name on Record |
| Last Sale | $358,000 (Aug 2006) |
| Tax Bill | $4,831 (2025) |
| Deeds & Mortgages | Oct 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-08-1-03-034 |
| Primary APN | 1577-08-1-03-034 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3.25 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 1,807 sqft Living Area |
| Gross Area | 2,270 sqft |
| 1st Floor Area | 1,014 sqft |
| Basement Area | 1,014 sqft |
| Finished Basement | 793 sqft |
| Unfinished Basement | 221 sqft |
| Interior Walls | Plaster |
| Year Built | Built 1958 |
|---|---|
| Effective Year Built | Effective 1963 |
| Architectural Style | Ranch |
| Exterior Material | Combination |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Asphalt |
| Lot Area | 7,009 sqft (0.161 acres) |
| Garage Type | Attached |
| Garage Area | 242 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Porch |
| Porch Area | 242 sqft |
| Patio Area | 55 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0011985 |
|---|---|
| Street Address | 525 S 45TH ST |
| City | BOULDER |
| State | CO |
| Zip | 80305-6049 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 34 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 | 34 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3001 |
| Census Tract | 12508 |
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 | Company Name on Record |
|---|---|
| Mailing Address | 525 S 45TH ST, BOULDER, CO 80305-6049 |
| Owner Type | Company |
| Vesting | Limited Liability Partnership |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Aug 24, 2006 · Amount on Record |
| Deed Sale | Aug 24, 2006 · Amount on Record |
| Prior Sale | May 18, 2000 · Amount on Record |
| Deed Document Number | 20062800139 |
| Last Transfer Date | Feb 10, 2025 |
| Transfer Doc | 0004075761 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 525 S 45TH ST, BOULDER, CO 80305-6049 |
| Transaction Type | Mortgage |
| Record Updated | Nov 12, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0003923635 |
|---|---|
| Date | Oct 26, 2021 |
| Instrument | 3923635 |
| Name | BOX HOME LOANS |
|---|---|
| Type | Mortgage Company |
| Address | LINDON, UT 84042 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Nov 1, 2051 |
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 | $49,450 (-0.75%) Land $27,262 Building $22,188 | $797,200 (-) Land $470,900 Building $326,300 | |
| 2025 | $4,831.00 (+3.89%) | $49,825 (-12.07%) Land $29,431 Building $20,394 | $797,200 (-5.73%) Land $470,900 Building $326,300 |
| 2023 | $4,650.00 (+12.4%) | $56,662 (+29.53%) Land $34,780 Building $21,882 | $845,700 (+34.37%) Land $519,100 Building $326,600 |
| 2022 | $4,137.00 | $43,744 Land $25,889 Building $17,855 | $629,400 Land $372,500 Building $256,900 |
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 | 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.
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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