Boulder County property record for 605 20th St, Boulder, CO 80302
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.25 ba · 1,806 sqft · built 1941 |
| Lot Size | 0.252 acres (10,972 sqft) |
| Owner | Company Name on File |
| Tax Bill | $9,141 (2025) |
| Deeds & Mortgages | Sep 2022 Transfer Aug 2019 Mortgage + 2 more |
| Flood Zone | Zone X (moderate risk) |
| APN | 1577-06-1-24-001 |
| Primary APN | 1577-06-1-24-001 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.25 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 1,806 sqft Living Area |
| 1st Floor Area | 903 sqft |
| Upper Floors Area | 903 sqft |
| Interior Walls | Plaster |
| Year Built | Built 1941 |
|---|---|
| Effective Year Built | Effective 1988 |
| Architectural Style | A-Frame |
| Exterior Material | Combination |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Asphalt |
| Lot Area | 10,972 sqft (0.252 acres) |
| Garage Type | Carport |
| Garage Area | 312 sqft |
| Carport | Carport |
| Carport Area | 312 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0613548 |
|---|---|
| Street Address | 605 20TH ST |
| City | BOULDER |
| State | CO |
| Zip | 80302-7714 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 8A OF LOT LINE ADJ LOTS 6 7 8 BLK 1 FLORAL PARK ADDN PER MAP REC 3813412 9/8/2020 |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 6 |
| Legal Subdivision | FLORAL PARK LOT LINE ADJUSTMENT 8A 6A |
| Legal Block | 1 |
| Legal Lot Number | 8A |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1005 |
| Census Tract | 12505 |
Source: Boulder County assessment roll, APN 1577-06-1-24-001, as of 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 | Company Name on File |
|---|---|
| Mailing Address | 137 LOCUST AVE, MILL VALLEY, CA 94941-2127 |
| Owner Type | Company |
| Vesting | Trust, Living Trust |
| Date | Document |
|---|---|
| Sep 19, 2022 | Intrafamily Transfer, Transfer |
| Aug 07, 2019 | Deed of Trust, Mortgage · Commercial Mortgage ALPINE BANK |
| Sep 30, 2020 | Quit Claim Deed, Transfer NOT AVAILABLE |
| Sep 30, 2020 | Special Warranty Deed, Transfer · Conventional Mortgage BANK OF AMERICA NA |
| Deed Names | Verified Name on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Sep 19, 2022 |
| Property Address | 605 20TH ST, BOULDER, CO 80302-7714 |
| Document Number | 0003981634 |
| Map Reference | DOC 03813412 |
| Instrument Date | Sep 16, 2022 |
| Instrument | 3981634 |
| Transaction Type | Transfer |
| Record Updated | Jun 07, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Living Trust |
| Address | 137 LOCUST AVE, MILL VALLEY, CA 94941-2127 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 605 20TH ST, BOULDER, CO 80302-7714 |
| Transaction Type | Mortgage |
| Record Updated | Mar 31, 2022 |
| Name | Verified Name |
|---|
| Document Number | 0003728960 |
|---|---|
| Date | Aug 07, 2019 |
| Instrument | 3728960 |
| Name | ALPINE BANK |
|---|---|
| Type | Bank |
| Address | RIFLE, CO 81650 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 120 Months |
| Due | Aug 25, 2029 |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Sep 30, 2020 |
| Property Address | 605 20TH ST, BOULDER, CO 80302-7714 |
| Document Number | 0003819961 |
| Instrument Date | Sep 14, 2020 |
| Instrument | 3819961 |
| Transaction Type | Transfer |
| Record Updated | Jun 01, 2021 |
| Title Company | NOT AVAILABLE |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 1911 COLUMBINE AVE BOULDER CO 803027918, BOULDER, CO 80302-7918 |
| Document Type | Special Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Sep 30, 2020 |
| Property Address | 605 20TH ST, BOULDER, CO 80302-7714 |
| Document Number | 0003819969 |
| Map Reference | DOC 03813412 |
| Instrument Date | Sep 14, 2020 |
| Instrument | 3819969 |
| Transaction Type | Transfer |
| Record Updated | Mar 31, 2022 |
| Title Company | LAND TITLE GUARANTEE |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $85.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 605 20TH ST, 605, BOULDER, CO 80302-7714 |
| Name | Verified Name |
|---|---|
| Address | 605 20TH ST, BOULDER, CO 80302-7714 |
| Investor | Possibly a Property Investor |
| Document Number | 0003819970 |
|---|---|
| Date | Sep 30, 2020 |
| Instrument | 3819970 |
| Name | BANK OF AMERICA NA |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Oct 01, 2050 |
Source: Boulder County assessment roll as of 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 | $104,305 (+8.8%) Land $79,424 Building $24,881 | $1,533,900 (-) Land $1,168,000 Building $365,900 | |
| 2025 | $9,141.00 (+14.13%) | $95,869 (-0.58%) Land $73,000 Building $22,869 | $1,533,900 (+6.58%) Land $1,168,000 Building $365,900 |
| 2023 | $8,009.00 (-2.98%) | $96,426 (+8.47%) Land $74,383 Building $22,043 | $1,439,200 (+12.52%) Land $1,110,200 Building $329,000 |
| 2022 | $8,255.00 | $88,897 Land $57,782 Building $31,115 | $1,279,100 Land $831,400 Building $447,700 |
Source: FEMA National Flood Hazard Layer, Boulder County (08013C), as of October 14, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 080130125051, as of September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · 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 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 15 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 15 in force |
| Nearby Flood Claims | 12 (1994–2013) |
| Claims Outside the SFHA | 4 of 12 |
| Most Recent Claim | Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides |
| Claims by Event |
|
| Wildfire Risk | Low lower than 62% of the US · lower than 79% of Colorado |
|---|---|
| Wildfire Likelihood | 0.05% 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, 481 locations within half a mile, 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: Magnolia Road Internet Cooperative.
Source: EPA Safe Drinking Water Information System, water system CO0107152, 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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