Boulder County property record for 40 S 35th St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 1,280 sqft · built 1962 |
| Lot Size | 0.173 acres (7,542 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $900,000 (Mar 2022) |
| Tax Bill | $5,035 (2025) |
| Deeds & Mortgages | Mar 2022 Sale & Mortgage Jan 2021 Mortgage |
| Flood Zone | Zone X (moderate risk) |
| APN | 1577-05-2-28-002 |
| Primary APN | 1577-05-2-28-002 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Building Area | 1,280 sqft Living Area |
| Gross Area | 1,568 sqft |
| 1st Floor Area | 896 sqft |
| Basement Area | 384 sqft |
| Finished Basement | 384 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1962 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | Split Level |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Asphalt |
| Lot Area | 7,542 sqft (0.173 acres) |
| Garage Type | Attached |
| Garage Area | 288 sqft |
| Parking Spaces | 1 Parking Space |
| Patio Area | 60 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0012235 |
|---|---|
| Street Address | 40 S 35TH ST |
| City | BOULDER |
| State | CO |
| Zip | 80305-5525 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 4 BLK 4 WILLIAM MARTIN HOMESTEAD |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 05 |
| Legal Subdivision | WILLIAM MARTIN HOMESTEAD - BO |
| Legal Block | 4 |
| Legal Lot Number | 4 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1007 |
| Census Tract | 12507 |
Source: Boulder County records · APN 1577-05-2-28-002
Assessment roll updated June 15, 2026 · Last verified June 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 File |
|---|---|
| Mailing Address | 40 S 35TH ST, BOULDER, CO 80305-5525 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Mar 07, 2022 | Warranty Deed, Transfer · Conventional Mortgage DSW MORTGAGE INC |
| Jan 21, 2021 | Deed of Trust, Mortgage · Conventional Mortgage KELLER MORTGAGE LLC |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Mar 07, 2022 · Amount on Record |
| Deed Sale | Mar 07, 2022 · Amount on Record |
| Prior Sale | Mar 04, 2011 · Amount on Record |
| Deed Document Number | 20223949175 |
| Prior Transfer Date | Dec 24, 2003 |
| Prior Transfer Doc | 0002906318 |
| Record Updated | Sep 20, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Mar 07, 2022 |
| Property Address | 40 S 35TH ST, BOULDER, CO 80305-5525 |
| Document Number | 0003949175 |
| Instrument Date | Mar 04, 2022 |
| Instrument | 3949175 |
| Transaction Type | Transfer |
| Record Updated | Mar 23, 2022 |
| Title Company | LAND TITLE GUARANTY COMPANY IN, LAND TITLE GUARANTEE CO |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $90.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 40 S 35TH ST, BOULDER, CO 80305-5525 |
| Document Number | 0003949176 |
|---|---|
| Date | Mar 07, 2022 |
| Instrument | 3949176 |
| Name | DSW MORTGAGE INC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Apr 01, 2052 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 40 S 35TH ST, BOULDER, CO 80305-5525 |
| Transaction Type | Mortgage |
| Record Updated | Feb 09, 2021 |
| Title Company | FIRST INTEGRITY TITLE |
| Name | Verified Name |
|---|
| Document Number | 0003852335 |
|---|---|
| Date | Jan 21, 2021 |
| Instrument | 3852335 |
| Name | KELLER MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | DUBLIN, OH 43016 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 358 Months |
| Due | Nov 01, 2050 |
Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified June 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Municipality | Boulder City |
| Unified School District | Boulder Valley School District RE-2 (PK - 12) |
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.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $57,460 (+8.8%) Land $38,964 Building $18,496 | $845,000 (-) Land $573,000 Building $272,000 | |
| 2025 | $5,035.00 (+1.29%) | $52,813 (-12.53%) Land $35,813 Building $17,000 | $845,000 (-6.24%) Land $573,000 Building $272,000 |
| 2023 | $4,971.00 (+13.13%) | $60,380 (+29.8%) Land $41,962 Building $18,418 | $901,200 (+34.65%) Land $626,300 Building $274,900 |
| 2022 | $4,394.00 | $46,516 Land $31,129 Building $15,387 | $669,300 Land $447,900 Building $221,400 |
Source: FEMA National Flood Hazard Layer as of October 14, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone X moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 25 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 25 in force |
| Nearby Flood Claims | 16 (1995–2013) |
| Claims Outside the SFHA | 2 of 16 |
| Most Recent Claim | Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides |
| Claims by Event |
|
| 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 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: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Fixed Wireless | 2,500 / 2,500 |
| Lumen Technologies Fiber | 2,000 / 1,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| Live Wire Networks Fixed Wireless | 250 / 100 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
Based on FCC filings for 451 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | CITY OF BOULDER serves 166,080 people |
|---|---|
| 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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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