Boulder County property record for 335 S 42nd St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.75 ba · 2,955 sqft · built 1956 |
| Lot Size | 0.173 acres (7,520 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,155,000 (Feb 2023) |
| Tax Bill | $6,324 (2025) |
| Deeds & Mortgages | Feb 2023 Sale & Mortgage Apr 2021 Mortgage + 2 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-05-4-24-030 |
| Primary APN | 1577-05-4-24-030 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.75 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 2,955 sqft Living Area |
| Gross Area | 3,045 sqft |
| 1st Floor Area | 1,506 sqft |
| Upper Floors Area | 549 sqft |
| Basement Area | 990 sqft |
| Finished Basement | 900 sqft |
| Unfinished Basement | 90 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1956 |
|---|---|
| Effective Year Built | Effective 1985 |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Asphalt |
| Lot Area | 7,520 sqft (0.173 acres) |
| Porch | Porch |
| Porch Area | 160 sqft |
| Deck Area | 99 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0012228 |
|---|---|
| Street Address | 335 S 42ND ST |
| City | BOULDER |
| State | CO |
| Zip | 80305-5453 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 30 BLK 7 MARTIN ACRES 2 |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 05 |
| Legal Subdivision | MARTIN ACRES 2 - BO |
| Legal Block | 7 |
| Legal Lot Number | 30 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3008 |
| Census Tract | 12507 |
Source: Boulder County records · APN 1577-05-4-24-030
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 | 335 S 42ND ST, BOULDER, CO 80305-5453 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Tenants in Common |
| Date | Document |
|---|---|
| Feb 28, 2023 | Special Warranty Deed, Transfer · Conventional Mortgage WELLS FARGO BANK NA |
| Apr 26, 2021 | Deed of Trust, Mortgage · Conventional Mortgage UNITED WHOLESALE MORTGAGE |
| Jan 23, 2017 | Deed of Trust, Mortgage · Conventional Mortgage UNITED WHOLESALE MORTGAGE |
| Jul 25, 2019 | Deed of Trust, Mortgage · Line of Credit ELEVATIONS CU |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Feb 28, 2023 · Amount on Record |
| Deed Sale | Feb 28, 2023 · Amount on Record |
| Prior Sale | Apr 29, 1992 · Amount on Record |
| Deed Document Number | 20233998558 |
| Prior Transfer Date | Feb 23, 2023 |
| Prior Transfer Doc | 0003998558 |
| Record Updated | Sep 20, 2026 |
| Document Type | Special Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Feb 28, 2023 |
| Property Address | 335 S 42ND ST, BOULDER, CO 80305-5453 |
| Document Number | 0003998558 |
| Instrument Date | Feb 23, 2023 |
| Instrument | 3998558 |
| Transaction Type | Transfer |
| Record Updated | Mar 07, 2023 |
| Title Company | GUARDIAN LAND TITLE, GUARDIAN TITLE |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $115.50 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Tenants in Common |
| Address | 335 S 42ND ST, BOULDER, CO 80305-5453 |
| Document Number | 0003998559 |
|---|---|
| Date | Feb 28, 2023 |
| Instrument | 3998559 |
| Name | WELLS FARGO BANK NA |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Mar 01, 2053 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 335 S 42ND ST, BOULDER, CO 80305-5453 |
| Transaction Type | Mortgage |
| Record Updated | May 12, 2021 |
| Title Company | FITCO |
| Name | Verified Name |
|---|
| Document Number | 0003879743 |
|---|---|
| Date | Apr 26, 2021 |
| Instrument | 3879743 |
| Name | UNITED WHOLESALE MORTGAGE |
|---|---|
| Type | Mortgage Company |
| Address | PONTIAC, MI 48341 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | May 01, 2051 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 335 S 42ND ST, BOULDER, CO 80305-5453 |
| Transaction Type | Mortgage |
| Record Updated | Feb 05, 2021 |
| Title Company | STEWART TITLE |
| Name | Verified Name |
|---|
| Document Number | 0003570253 |
|---|---|
| Date | Jan 23, 2017 |
| Instrument | 3570253 |
| Name | UNITED WHOLESALE MORTGAGE |
|---|---|
| Type | Mortgage Company |
| Address | TROY, MI 48083 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Feb 01, 2047 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 335 S 42ND ST, BOULDER, CO 80305-5453 |
| Document Number | 0003726938 |
| Instrument Date | Jul 25, 2019 |
| Transaction Type | Mortgage |
| Record Updated | Aug 07, 2019 |
| Title Company | NOT AVAILABLE |
| Name | Verified Name |
|---|---|
| Address | 335 S 42ND ST BOULDER CO 803055453, BOULDER, CO 80305-5453 |
| Document Number | 0003726938 |
|---|---|
| Date | Jul 30, 2019 |
| Instrument | 3726938 |
| Name | ELEVATIONS CU |
|---|---|
| Address | BOULDER, CO 80301 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Term | 240 Months |
| Due | Jul 29, 2039 |
| Rate Type | Adjustable Rate |
|---|
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 | $72,169 (+8.8%) Land $38,903 Building $33,266 | $1,061,300 (-) Land $572,100 Building $489,200 | |
| 2025 | $6,324.00 (+0.85%) | $66,331 (-13.07%) Land $35,756 Building $30,575 | $1,061,300 (-6.81%) Land $572,100 Building $489,200 |
| 2023 | $6,271.00 (+14.06%) | $76,307 (+28.88%) Land $41,902 Building $34,405 | $1,138,900 (+33.69%) Land $625,400 Building $513,500 |
| 2022 | $5,498.00 | $59,207 Land $31,080 Building $28,127 | $851,900 Land $447,200 Building $404,700 |
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 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 |
|
| 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 · DSL in parts of the area | 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 |
May also be available: AT&T.
Based on FCC filings for 678 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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