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

Boulder County property record for 640 S 45th St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	5 bd · 2.5 ba · 2,222 sqft · built 1958
Lot Size	0.171 acres (7,450 sqft)
Owner	2 Individual Names on Record
Last Sale	$521,000 (Sep 2013)
Tax Bill	$6,033 (2025)
Deeds & Mortgages	Jun 2020 Mortgage Mar 2019 Mortgage + 2 more
Flood Zone	Zone X (minimal risk)
APN	`1577-08-1-02-010`

Property Details

APN / Parcel Number

Primary APN	`1577-08-1-02-010`
Alternative APNs	`R0010966` `0010966`

Interior

Bedrooms	5 Beds
Full Baths	2.5 Baths
Half Baths	2 Half Baths
Total Rooms	9 Rooms
Stories	1 Story
Building Area	2,222 sqft Living Area
Gross Area	2,472 sqft
1st Floor Area	1,222 sqft
Basement Area	1,222 sqft
Finished Basement	1,000 sqft
Unfinished Basement	222 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1958
Effective Year Built	Effective 1985
Architectural Style	Ranch
Exterior Material	Combination
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	7,450 sqft (0.171 acres)
Garage Type	Detached
Garage Area	525 sqft
Parking Spaces	2 Parking Spaces
Porch	Enclosed Porch
Porch Area	28 sqft
Deck Area	585 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0010966
Street Address	640 S 45TH ST
City	BOULDER
State	CO
Zip	80305-6052
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 10 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	10
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3000
Census Tract	12508

Owner

Source: Boulder County records, as of September 18, 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 Record
Mailing Address	640 S 45TH ST, BOULDER, CO 80305-6052
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Jun 1, 2020	Deed of Trust, Mortgage · Conventional Mortgage CHERRY CREEK MORTGAGE CO INC
Mar 8, 2019	Quit Claim Deed, Transfer · Conventional Mortgage UNITED WHOLESALE MORTGAGE
Aug 20, 2018	Quit Claim Deed, Transfer · Conventional Mortgage UNITED WHOLESALE MORTGAGE
Aug 21, 2018	Quit Claim Deed, Transfer ASCENDANT TITLE INC

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 10, 2013 · Amount on Record
Deed Sale	Sep 10, 2013 · Amount on Record
Prior Sale	Jul 7, 2008 · Amount on Record
Deed Document Number	20133341224
Last Transfer Date	Feb 26, 2019
Transfer Doc	0003701257
Record Updated	Oct 29, 2026

June 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	640 S 45TH ST, BOULDER, CO 80305-6052
Transaction Type	Mortgage
Record Updated	Feb 5, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003787746
Date	Jun 1, 2020
Instrument	3787746

Lender

Name	CHERRY CREEK MORTGAGE CO INC
Type	Mortgage Company
Address	ENGLEWOOD, CO 80111

Agreement

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

March 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	BOULDER CO
Recording Date	Mar 8, 2019
Property Address	640 S 45TH ST, BOULDER, CO 80305-6052
Document Number	0003701257
Instrument Date	Feb 26, 2019
Instrument	3701257
Transaction Type	Transfer
Record Updated	Mar 31, 2022

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name
Address	00000

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	640 S 45TH ST, BOULDER, CO 80305-6052

Mortgage

Document Number	0003701258
Date	Mar 8, 2019
Instrument	3701258

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Mar 1, 2049

August 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	BOULDER CO
Recording Date	Aug 20, 2018
Property Address	640 S 45TH ST, BOULDER, CO 80305-6052
Document Number	0003671941
Instrument Date	Jul 23, 2018
Instrument	3671941
Transaction Type	Transfer
Record Updated	Mar 31, 2022
Title Company	ASCENDANT TITLE CO

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name
Address	00000

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	640 S 45TH ST, BOULDER, CO 80305-6052

Mortgage

Document Number	0003671942
Date	Aug 20, 2018
Instrument	3671942

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Aug 1, 2048

August 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	BOULDER CO
Recording Date	Aug 21, 2018
Property Address	640 S 45TH ST, BOULDER, CO 80305-6052
Document Number	0003672385
Instrument Date	Jul 23, 2018
Instrument	3672385
Transaction Type	Transfer
Record Updated	Aug 29, 2018
Title Company	ASCENDANT TITLE INC

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Living Trust
Address	640 S 45TH ST BOULDER CO 803056052, BOULDER, CO 80305-6052

Tax Assessment & Valuation

Source: Boulder County assessment roll, as of September 18, 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		$64,090 (+1.28%) Land $28,254 Building $35,836	$1,012,500 (-) Land $485,500 Building $527,000
2025	$6,033.00 (+1.17%)	$63,282 (-13%) Land $30,344 Building $32,938	$1,012,500 (-6.74%) Land $485,500 Building $527,000
2023	$5,963.00 (+15.85%)	$72,742 (+31.24%) Land $35,858 Building $36,884	$1,085,700 (+36.14%) Land $535,200 Building $550,500
2022	$5,147.00	$55,426 Land $26,695 Building $28,731	$797,500 Land $384,100 Building $413,400

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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