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

Boulder County property record for 545 S 45th St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	3 bd · 1.75 ba · 2,236 sqft · built 1958
Lot Size	0.161 acres (7,029 sqft)
Owner	2 Individual Names on File
Last Sale	$600,000 (Jun 2020)
Tax Bill	$4,851 (2025)
Deeds & Mortgages	Jan 2026 Line of Credit Jun 2020 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`1577-08-1-03-032`

Property Details

APN / Parcel Number

Primary APN	`1577-08-1-03-032`
Alternative APNs	`R0014081` `0014081`

Interior

Bedrooms	3 Beds
Full Baths	1.75 Baths
Half Baths	1 Half Bath
Total Rooms	5 Rooms
Stories	1 Story
Building Area	2,236 sqft Living Area
Gross Area	2,488 sqft
1st Floor Area	1,118 sqft
Basement Area	1,118 sqft
Finished Basement	1,118 sqft
Interior Walls	Plaster

Exterior

Year Built	Built 1958
Effective Year Built	Effective 1958
Architectural Style	Ranch
Exterior Material	Combination
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	7,029 sqft (0.161 acres)
Garage Type	Attached
Garage Area	252 sqft
Parking Spaces	1 Parking Space
Porch	Porch
Porch Area	256 sqft

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0014081
Street Address	545 S 45TH ST
City	BOULDER
State	CO
Zip	80305-6049
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 32 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	32
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3001
Census Tract	12508

Owner

Source: Boulder County assessment roll, 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	2 Individual Names on File
Mailing Address	545 S 45TH ST, BOULDER, CO 80305-6049
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Date	Document
Jan 12, 2026	Deed of Trust, Mortgage · Line of Credit ZB NA
Jun 4, 2020	Special Warranty Deed, Transfer · Conventional Mortgage GUARANTEED RATE AFFINITY LLC

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Jun 4, 2020 · Amount on Record
Deed Sale	Jun 4, 2020 · Amount on Record
Prior Sale	Dec 6, 1985 · Amount on Record
Deed Document Number	20203788863
Prior Transfer Date	Aug 23, 1999
Prior Transfer Doc	0001975570
Record Updated	Sep 20, 2026

January 2026: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	545 S 45TH ST, BOULDER, CO 80305-6049
Transaction Type	Mortgage
Record Updated	Feb 5, 2026

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	5523 S QUATAR ST, CENTENNIAL, CO 80015-3556

Mortgage

Document Number	0004116157
Date	Jan 12, 2026
Instrument	4116157

Lender

Name	ZB NA
Type	Bank
Address	DENVER, CO 80234

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	358 Months
Due	Nov 6, 2055

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

June 2020: Special Warranty Deed, Transfer

Document Type	Special Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Jun 4, 2020
Property Address	545 S 45TH ST, BOULDER, CO 80305-6049
Document Number	0003788863
Instrument Date	Jun 3, 2020
Instrument	3788863
Transaction Type	Transfer
Record Updated	Mar 31, 2022
Title Company	FIDELITY NATIONAL TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$60.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	545 S 45TH ST, BOULDER, CO 80305-6049

Mortgage

Document Number	0003788864
Date	Jun 4, 2020
Instrument	3788864

Lender

Name	GUARANTEED RATE AFFINITY LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jul 1, 2050

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		$54,441 (+8.8%) Land $32,069 Building $22,372	$800,600 (-) Land $471,600 Building $329,000
2025	$4,851.00 (+2.91%)	$50,038 (-12.85%) Land $29,475 Building $20,563	$800,600 (-6.57%) Land $471,600 Building $329,000
2023	$4,714.00 (+13.18%)	$57,413 (+30.34%) Land $34,827 Building $22,586	$856,900 (+35.2%) Land $519,800 Building $337,100
2022	$4,165.00	$44,049 Land $25,930 Building $18,119	$633,800 Land $373,100 Building $260,700

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

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 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.

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