Boulder County property record for 730 S 45th St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1.75 ba · 2,030 sqft · built 1959 |
| Lot Size | 0.174 acres (7,585 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $873,000 (Jul 2024) |
| Tax Bill | $4,374 (2025) |
| Deeds & Mortgages | Jul 2026 Mortgage Aug 2018 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-08-1-02-015 |
| Primary APN | 1577-08-1-02-015 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1.75 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 2,030 sqft Living Area |
| Gross Area | 2,466 sqft |
| 1st Floor Area | 1,107 sqft |
| Basement Area | 1,107 sqft |
| Finished Basement | 923 sqft |
| Unfinished Basement | 184 sqft |
| Interior Walls | Plaster |
| Year Built | Built 1959 |
|---|---|
| Effective Year Built | Effective 1990 |
| Architectural Style | Ranch |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Lot Area | 7,585 sqft (0.174 acres) |
| Garage Type | Attached |
| Garage Area | 252 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Porch |
| Porch Area | 256 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0013930 |
|---|---|
| Street Address | 730 S 45TH ST |
| City | BOULDER |
| State | CO |
| Zip | 80305-6054 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 15 BLK 2 MARTIN ACRES 3 |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 05 |
| Legal Subdivision | MARTIN ACRES 3 - BO |
| Legal Block | 2 |
| Legal Lot Number | 15 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 12508 |
Source: Boulder County records · APN 1577-08-1-02-015
Assessment roll updated June 15, 2026 · Last verified July 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 | 730 S 45TH ST, BOULDER, CO 80305-6054 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Date | Document |
|---|---|
| Jul 13, 2026 | Deed of Trust, Mortgage · Conventional Mortgage SUN WEST MORTGAGE COMPANY INC |
| Aug 06, 2018 | Quit Claim Deed, Transfer Quitclaim |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Jul 11, 2024 · Amount on Record |
| Deed Sale | Jul 11, 2024 · Amount on Record |
| Prior Sale | May 13, 2024 · Amount on Record |
| Deed Document Number | 20244053406 |
| Prior Transfer Date | Nov 15, 2006 |
| Prior Transfer Doc | 0002823013 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Jul 13, 2026 |
| Property Address | 730 S 45TH ST, BOULDER, CO 80305-6054 |
| Document Number | 0004139619 |
| Instrument Date | Jul 08, 2026 |
| Instrument | 20264139619 |
| Transaction Type | Mortgage |
| Record Updated | Jul 21, 2026 |
| Title Company | COMMONWEALTH LAND TITLE INSURANCE, COMMONWEALTH LAND TITLE |
| Name | Verified Name |
|---|---|
| Address | 730 S 45TH ST, BOULDER, CO 80305-6054 |
| Document Number | 0004139619, |
|---|---|
| Date | Jul 13, 2026 |
| Instrument | 20264139619 |
| Name | SUN WEST MORTGAGE COMPANY INC |
|---|
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Aug 01, 2056 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 6.52% |
| Initial Type | Fixed Rate |
| Max Rate | -1% |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Aug 06, 2018 |
| Property Address | 730 S 45TH ST, BOULDER, CO 80305-6054 |
| Document Number | 0003669693 |
| Instrument Date | Jul 15, 2018 |
| Instrument | 3669693 |
| Transaction Type | Transfer |
| Record Updated | Aug 15, 2018 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 998 CHERRYVALE RD BOULDER CO 803032915, BOULDER, CO 80303-2915 |
Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified July 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 | $64,729 (+43.74%) Land $33,313 Building $31,416 | $951,900 (+32.12%) Land $489,900 Building $462,000 | |
| 2025 | $4,374.00 (+8.75%) | $45,032 (-8.84%) Land $30,619 Building $14,413 | $720,500 (-2.28%) Land $489,900 Building $230,600 |
| 2023 | $4,022.00 (+13.71%) | $49,399 (+32.48%) Land $36,180 Building $13,219 | $737,300 (+37.43%) Land $540,000 Building $197,300 |
| 2022 | $3,537.00 | $37,287 Land $26,931 Building $10,356 | $536,500 Land $387,500 Building $149,000 |
Source: FEMA National Flood Hazard Layer, Boulder County (08013C), as of October 14, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 080130125083, 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 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 |
| Wildfire Risk | Low lower than 67% of the US · lower than 84% of Colorado |
|---|---|
| Wildfire Likelihood | 0.04% annual chance |
| Exposure | Indirect within 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, 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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