645 S 45th St, Boulder, CO 80305 Property Records

Boulder County property record for 645 S 45th St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	3 bd · 2.5 ba · 2,322 sqft · built 1958
Lot Size	0.161 acres (7,032 sqft)
Owner	Individual Name on Record
Last Sale	$1,185,000 (Oct 2022)
Tax Bill	$5,886 (2025)
Deeds & Mortgages	Oct 2022 Sale & Mortgage Nov 2021 Line of Credit + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1577-08-1-03-026`

Property Details

APN / Parcel Number

Primary APN	`1577-08-1-03-026`
Alternative APNs	`R0012514` `0012514`

Interior

Bedrooms	3 Beds
Full Baths	2.5 Baths
Half Baths	2 Half Baths
Total Rooms	6 Rooms
Stories	1 Story
Building Area	2,322 sqft Living Area
Gross Area	2,444 sqft
1st Floor Area	1,222 sqft
Basement Area	1,222 sqft
Finished Basement	1,042 sqft
Unfinished Basement	180 sqft
Interior Walls	Plaster

Exterior

Year Built	Built 1958
Effective Year Built	Effective 1995
Architectural Style	Ranch
Exterior Material	Combination
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	7,032 sqft (0.161 acres)

Exterior Amenities

Porch	Porch
Porch Area	192 sqft
Shed	1 Shed
Total Buildings	2 Buildings

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0012514
Street Address	645 S 45TH ST
City	BOULDER
State	CO
Zip	80305-6051
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 26 BLK 3 MARTIN ACRES 3
Legal Range	70
Legal Township	1S
Legal Section	05
Legal Subdivision	MARTIN ACRES 3 - BO
Legal Block	3
Legal Lot Number	26
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3001
Census Tract	12508

Owner

Source: Boulder County records, as of June 15, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Individual Name on Record
Mailing Address	1524 E ARLINGTON DR, SALT LAKE CITY, UT 84103-4428
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Oct 3, 2022	Special Warranty Deed, Transfer · Conventional Mortgage WELLS FARGO BANK NA
Nov 30, 2021	Deed of Trust, Mortgage · Line of Credit ENT CU
Oct 13, 2021	Deed of Trust, Mortgage · Conventional Mortgage SWBC MORTGAGE CORP

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Oct 3, 2022 · Amount on Record
Deed Sale	Oct 3, 2022 · Amount on Record
Prior Sale	Aug 24, 2011 · Amount on Record
Deed Document Number	20223983763
Prior Transfer Date	Sep 11, 2009
Prior Transfer Doc	0003029343
Record Updated	Sep 20, 2026

October 2022: Special Warranty Deed, Transfer

Document Type	Special Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Oct 3, 2022
Property Address	645 S 45TH ST, BOULDER, CO 80305-6051
Document Number	0003983763
Instrument Date	Sep 20, 2022
Instrument	3983763
Transaction Type	Transfer
Record Updated	Oct 10, 2022
Title Company	LAND TITLE GUARANTEE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$118.50
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	645 S 45TH ST, 645, BOULDER, CO 80305-6051

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1524 E ARLINGTON DR, SALT LAKE CITY, UT 84103-4428

Mortgage

Document Number	0003983764
Date	Oct 3, 2022
Instrument	3983764

Lender

Name	WELLS FARGO BANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Oct 1, 2052

November 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	645 S 45TH ST, BOULDER, CO 80305-6051
Transaction Type	Mortgage
Record Updated	Dec 15, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003931222
Date	Nov 30, 2021
Instrument	3931222

Lender

Name	ENT CU
Type	Credit Union
Address	COLORADO SPRINGS, CO 80921

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	300 Months
Due	Nov 28, 2046

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

October 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	645 S 45TH ST, BOULDER, CO 80305-6051
Transaction Type	Mortgage
Record Updated	Oct 29, 2021
Title Company	FIRST INTEGRITY TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	645 S 45TH ST, BOULDER, CO 80305-6051

Mortgage

Document Number	0003920471
Date	Oct 13, 2021
Instrument	3920471

Lender

Name	SWBC MORTGAGE CORP
Type	Mortgage Company
Address	SAN ANTONIO, TX 78216

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	241 Months
Due	Nov 1, 2041

Tax Assessment & Valuation

Source: Boulder County assessment roll, as of June 15, 2026

Property Jurisdictions

Type	Name
State	Colorado
County	Boulder County
Municipality	Boulder City
Unified School District	Boulder Valley School District RE-2 (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$67,164 (+8.8%) Land $32,076 Building $35,088	$987,700 (-) Land $471,700 Building $516,000
2025	$5,886.00 (+4.42%)	$61,731 (-10.5%) Land $29,481 Building $32,250	$987,700 (-4.05%) Land $471,700 Building $516,000
2023	$5,637.00 (+13.49%)	$68,970 (+28.93%) Land $34,833 Building $34,137	$1,029,400 (+33.74%) Land $519,900 Building $509,500
2022	$4,967.00	$53,494 Land $25,937 Building $27,557	$769,700 Land $373,200 Building $396,500

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.

Flood

Source: FEMA National Flood Hazard Layer, effective October 14, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 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

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.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

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 cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	CITY OF BOULDER serves 166,080 people · EPA ID CO0107152
Water Source	Surface water
Last State Inspection	Sep 2024
Lead	2 ppb (2023–2025) action level 15 ppb

Violations Reported to EPA

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, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 678 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Ayva Networks Fixed Wireless	2,500 / 2,500
CenturyLink Fiber · DSL in parts of the area	2,000 / 1,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
LiveWireNet Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: AT&T.

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