Boulder County property record for 535 S 40th St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.25 ba · 2,214 sqft · built 1959 |
| Lot Size | 0.163 acres (7,077 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $293,900 (Jul 2003) |
| Tax Bill | $4,817 (2025) |
| Deeds & Mortgages | Aug 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-08-1-08-004 |
| Primary APN | 1577-08-1-08-004 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.25 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 2,214 sqft Living Area |
| Gross Area | 2,511 sqft |
| 1st Floor Area | 1,107 sqft |
| Basement Area | 1,107 sqft |
| Finished Basement | 1,107 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1959 |
|---|---|
| Effective Year Built | Effective 1959 |
| Architectural Style | Ranch |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Lot Area | 7,077 sqft (0.163 acres) |
| Garage Type | Attached |
| Garage Area | 297 sqft |
| Parking Spaces | 1 Parking Space |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0014687 |
|---|---|
| Street Address | 535 S 40TH ST |
| City | BOULDER |
| State | CO |
| Zip | 80305-5902 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 4 BLK 8 MARTIN ACRES 3 |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 05 |
| Legal Subdivision | MARTIN ACRES 3 - BO |
| Legal Block | 8 |
| Legal Lot Number | 4 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3006 |
| 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 | Individual Name on Record |
|---|---|
| Mailing Address | 535 S 40TH ST, BOULDER, CO 80305-5902 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jul 28, 2003 · Amount on Record |
| Deed Sale | Jul 28, 2003 · Amount on Record |
| Prior Sale | Sep 28, 1992 |
| Deed Document Number | 20032477999 |
| Prior Transfer Date | Jan 11, 2001 |
| Prior Transfer Doc | 0002117634 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 535 S 40TH ST, BOULDER, CO 80305-5902 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | RAVENSWOOD TITLE COMPANY LLC |
| Name | Verified Name |
|---|
| Document Number | 0003804224 |
|---|---|
| Date | Aug 4, 2020 |
| Instrument | 3804224 |
| Name | GUARANTEED RATE INC |
|---|---|
| Type | Mortgage Company |
| Address | CHICAGO, IL 60613 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Aug 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 | $50,204 (-0.62%) Land $27,417 Building $22,787 | $808,300 (-) Land $473,200 Building $335,100 | |
| 2025 | $4,817.00 (+2.97%) | $50,519 (-12.69%) Land $29,575 Building $20,944 | $808,300 (-6.4%) Land $473,200 Building $335,100 |
| 2023 | $4,678.00 (+13.46%) | $57,861 (+30.31%) Land $34,947 Building $22,914 | $863,600 (+35.17%) Land $521,600 Building $342,000 |
| 2022 | $4,123.00 | $44,404 Land $26,014 Building $18,390 | $638,900 Land $374,300 Building $264,600 |
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 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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