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

Boulder County property record for 425 S 45th St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.75 ba · 2,312 sqft · built 1957
Lot Size	0.16 acres (6,979 sqft)
Owner	2 Individual Names on Record
Last Sale	$1,020,000 (Apr 2022)
Tax Bill	$6,115 (2025)
Deeds & Mortgages	Aug 2026 Line of Credit Apr 2022 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`1577-05-4-27-015`

Property Details

APN / Parcel Number

Primary APN	`1577-05-4-27-015`
Alternative APNs	`R0012401` `0012401`

Interior

Bedrooms	4 Beds
Full Baths	2.75 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Building Area	2,312 sqft Living Area
Gross Area	2,598 sqft
1st Floor Area	884 sqft
Upper Floors Area	544 sqft
Basement Area	884 sqft
Finished Basement	884 sqft

Exterior

Year Built	Built 1957
Effective Year Built	Effective 2000
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Lot Area	6,979 sqft (0.16 acres)
Garage Type	Attached
Garage Area	286 sqft
Parking Spaces	1 Parking Space
Porch	Porch
Porch Area	225 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0012401
Street Address	425 S 45TH ST
City	BOULDER
State	CO
Zip	80305-6047
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 15 BLK 10 MARTIN ACRES 2
Legal Subdivision	MARTIN ACRES 2 - BO
Legal Block	10
Legal Lot Number	15
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3011
Census Tract	12507

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	425 S 45TH ST, BOULDER, CO 80305-6047
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Aug 12, 2026	Deed of Trust, Mortgage · Line of Credit ELEVATIONS CREDIT UNION
Apr 13, 2022	Conservator's Deed, Transfer · Conventional Mortgage ELEVATIONS CU

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Apr 13, 2022 · Amount on Record
Deed Sale	Apr 13, 2022 · Amount on Record
Prior Sale	Jul 23, 2014 · Amount on Record
Deed Document Number	20223956355
Record Updated	Oct 29, 2026

August 2026: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Recording Date	Aug 12, 2026
Property Address	425 S 45TH ST, BOULDER, CO 80305-6047
Document Number	0004143671
Instrument Date	Aug 3, 2026
Instrument	20264143671
Transaction Type	Mortgage
Record Updated	Aug 20, 2026
Title Company	NONE LISTED ON DOCUMENT

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0004143671,
Date	Aug 12, 2026
Instrument	20264143671

Lender

Name	ELEVATIONS CREDIT UNION

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	240 Months
Due	Sep 1, 2046

Interest

Rate	6.43%
Max Rate	-1%

April 2022: Conservator's Deed, Transfer

Document Type	Conservator's Deed
Jurisdiction	BOULDER CO
Recording Date	Apr 13, 2022
Property Address	425 S 45TH ST, BOULDER, CO 80305-6047
Document Number	0003956355
Instrument Date	Apr 7, 2022
Instrument	3956355
Transaction Type	Transfer
Record Updated	Apr 26, 2022

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$102.00
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	425 S 45TH ST, BOULDER, CO 80305-6047

Mortgage

Document Number	0003956356
Date	Apr 13, 2022
Instrument	3956356

Lender

Name	ELEVATIONS CU
Type	Credit Union

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	May 1, 2052

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		$65,022 (+1.38%) Land $32,722 Building $32,300	$1,026,200 (-) Land $551,200 Building $475,000
2025	$6,115.00 (+2.05%)	$64,138 (-10.76%) Land $34,450 Building $29,688	$1,026,200 (-4.33%) Land $551,200 Building $475,000
2024	$5,992.00 (+1.77%)
2023	$5,888.00 (+38.35%)	$71,871 (+56.8%) Land $40,368 Building $31,503	$1,072,700 (+62.65%) Land $602,500 Building $470,200
2022	$4,256.00	$45,836 Land $29,941 Building $15,895	$659,500 Land $430,800 Building $228,700

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	6 in force
Nearby Flood Claims	7 (1979–2022)
Claims Outside the SFHA	5 of 7
Most Recent Claim	Jul 2022 · rainfall accumulation
Claims by Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 5 claims

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 80% of the US · lower than 91% of Colorado
Wildfire Likelihood	0.03% annual chance
Exposure	None beyond 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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