Boulder County property record for 437 18th St, Boulder, CO 80302 · Last verified June 2026
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 5.25 ba · 5,024 sqft · built 2008 |
| Lot Size | 0.27 acres (11,738 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $3,960,000 (Mar 2022) |
| Tax Bill | $24,045 (2025) |
| Deeds & Mortgages | Mar 2022 Sale & Mortgage Apr 2019 Sale & Line of Credit |
| Flood Zone | Zone X (moderate risk) |
| APN | 1577-06-2-10-001 |
| Primary APN | 1577-06-2-10-001 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 5.25 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 11 Rooms |
| Stories | 2 Stories |
| Building Area | 5,024 sqft Living Area |
| Gross Area | 5,967 sqft |
| 1st Floor Area | 2,085 sqft |
| Upper Floors Area | 2,939 sqft |
| Basement Area | 284 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 2008 |
|---|---|
| Effective Year Built | Effective 2011 |
| Architectural Style | A-Frame |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 11,738 sqft (0.27 acres) |
| Garage Type | Attached |
| Garage Area | 659 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Porch |
| Porch Area | 759 sqft |
| Deck Area | 174 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0005672 |
|---|---|
| Street Address | 437 18TH ST |
| City | BOULDER |
| State | CO |
| Zip | 80302-7904 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 1-2 & E 2.5 FT LOT 3 BLK 15 FLORAL PARK |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 06 |
| Legal Subdivision | FLORAL PARK & WEIHOFEN RESUB - BO |
| Legal Block | 15 |
| Legal Lot Number | 1 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1019 |
| Census Tract | 12505 |
Source: Boulder County records · APN 1577-06-2-10-001
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 | 437 18TH ST, BOULDER, CO 80302-7904 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Mar 03, 2022 | Warranty Deed, Transfer · Conventional Mortgage WELLS FARGO BANK NA |
| Apr 10, 2019 | Trustee's Deed, Transfer · Line of Credit FIRSTBANK |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Mar 03, 2022 · Amount on Record |
| Deed Sale | Mar 03, 2022 · Amount on Record |
| Prior Sale | Jun 15, 2016 · Amount on Record |
| Deed Document Number | 20223948333 |
| Prior Transfer Date | Sep 29, 2009 |
| Prior Transfer Doc | 0003036735 |
| Record Updated | Sep 20, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Mar 03, 2022 |
| Property Address | 437 18TH ST, BOULDER, CO 80302-7904 |
| Document Number | 0003948333 |
| Instrument Date | Jan 21, 2022 |
| Instrument | 3948333 |
| Transaction Type | Transfer |
| Record Updated | Mar 22, 2022 |
| Title Company | FIRST AMERICAN |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $396.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 437 18TH ST, BOULDER, CO 80302-7904 |
| Document Number | 0003948334 |
|---|---|
| Date | Mar 03, 2022 |
| Instrument | 3948334 |
| Name | WELLS FARGO BANK NA |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 359 Months |
| Due | Feb 01, 2052 |
| Document Type | Trustee's Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Apr 10, 2019 |
| Property Address | 437 18TH ST, BOULDER, CO 80302-7904 |
| Document Number | 0003706652 |
| Instrument Date | Apr 10, 2019 |
| Instrument | 3706652 |
| Transaction Type | Transfer |
| Record Updated | Apr 23, 2019 |
| Title Company | NOT AVAILABLE |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $1,060.00 |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Partnership |
| Address | 437 18TH ST BOULDER CO 803027904, BOULDER, CO 80302-7904 |
| Document Number | 3706653 |
|---|---|
| Date | Apr 10, 2019 |
| Instrument | 3706653 |
| Name | FIRSTBANK |
|---|---|
| Type | Bank |
| Address | 12345 W COLFAX AVE, LAKEWOOD, CO 80215-3742 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Term | 60 Months |
| Due | Apr 09, 2024 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 5.25% |
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 | $274,373 (+8.8%) Land $82,151 Building $192,222 | $4,034,900 (-) Land $1,208,100 Building $2,826,800 | |
| 2025 | $24,045.00 (+15.48%) | $252,181 (+3.02%) Land $75,506 Building $176,675 | $4,034,900 (+10.44%) Land $1,208,100 Building $2,826,800 |
| 2023 | $20,821.00 (+8.49%) | $244,791 (+18.44%) Land $75,757 Building $169,034 | $3,653,600 (+22.86%) Land $1,130,700 Building $2,522,900 |
| 2022 | $19,192.00 | $206,672 Land $62,376 Building $144,296 | $2,973,700 Land $897,500 Building $2,076,200 |
Source: FEMA National Flood Hazard Layer, Boulder County (08013C), updated October 14, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 080130125051, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Moderate |
| 500-Year Floodplain | Yes |
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Cost | Premium on Record median of 15 individual NFIP policies nearby |
| 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, river or lake flooding, Severe Storms, Flooding, Landslides, And Mudslides |
| Claims By Storm |
|
| Wildfire Risk | Moderate above 67% of the US · above 60% of Colorado |
|---|---|
| Wildfire Likelihood | About 1 in 366 per year |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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, availability as of December 31, 2025 · Published October 2026 · based on 481 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Ayva | Fixed Wireless (unlicensed) | 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 (licensed-by-rule) | 250 / 100 |
| T-Mobile USA | Fixed Wireless | 100 / 20 |
May also be available at this address: Lumen Technologies, Magnolia Road Internet Cooperative. Availability varies by address; speeds are provider-advertised maximums, not measured.
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