440 S 43rd St, Boulder, CO 80305 Property Records

Boulder County property record for 440 S 43rd St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	4 bd · 1.75 ba · 2,700 sqft · built 1957
Lot Size	0.161 acres (6,990 sqft)
Owner	2 Individual Names on File
Last Sale	$666,820 (Jul 2016)
Tax Bill	$6,220 (2025)
Deeds & Mortgages	Dec 2019 Mortgage Nov 2020 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1577-05-4-26-010`

Property Details

APN / Parcel Number

Primary APN	`1577-05-4-26-010`
Alternative APNs	`R0009644` `0009644`

Interior

Bedrooms	4 Beds
Full Baths	1.75 Baths
Half Baths	1 Half Bath
Total Rooms	7 Rooms
Stories	1 Story
Building Area	2,700 sqft Living Area
1st Floor Area	1,350 sqft
Basement Area	1,350 sqft
Finished Basement	1,350 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1957
Effective Year Built	Effective 2003
Architectural Style	Ranch
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	6,990 sqft (0.161 acres)
Garage Type	Attached
Garage Area	200 sqft
Parking Spaces	1 Parking Space
Porch	Porch
Porch Area	324 sqft

Utilities, Heating & Cooling

Cooling System	Evaporative
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0009644
Street Address	440 S 43RD ST
City	BOULDER
State	CO
Zip	80305-6008
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 10 BLK 9 MARTIN ACRES 2
Legal Range	70
Legal Township	1S
Legal Section	05
Legal Subdivision	MARTIN ACRES 2 - BO
Legal Block	9
Legal Lot Number	10
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3010
Census Tract	12507

Owner

440 S 43rd St is owned and occupied by two individuals who bought it in July 2016.

Source: Boulder County records, as of September 18, 2026

Owner of Record	2 Individual Names on File
Mailing Address	440 S 43RD ST, BOULDER, CO 80305-6008
Occupancy	Owner Occupied
Owner Type	Individual

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Date	Document
Dec 18, 2019	Deed of Trust, Mortgage · Conventional Mortgage CF BANK
Nov 30, 2020	Deed of Trust, Mortgage · Conventional Mortgage CHICAGO MORTGAGE SOLUTIONS CORP
Jan 24, 2019	Deed of Trust, Mortgage · Line of Credit ZIONS BANCORPORATION NA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jul 20, 2016 · Amount on File
Deed Sale	Jul 20, 2016 · Amount on File
Prior Sale	Jan 9, 2009 · Amount on File
Deed Document Number	20163531828
Record Updated	Oct 29, 2026

December 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	440 S 43RD ST, BOULDER, CO 80305-6008
Transaction Type	Mortgage
Record Updated	Feb 5, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003755594
Date	Dec 18, 2019
Instrument	3755594

Lender

Name	CF BANK
Type	Bank
Address	COLUMBUS, OH 43085

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	359 Months
Due	Nov 1, 2049

November 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	440 S 43RD ST, BOULDER, CO 80305-6008
Transaction Type	Mortgage
Record Updated	Feb 5, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003837249
Date	Nov 30, 2020
Instrument	3837249

Lender

Name	CHICAGO MORTGAGE SOLUTIONS CORP
Type	Mortgage Company
Address	DES PLAINES, IL 60018

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Nov 1, 2050

January 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	440 S 43RD ST, BOULDER, CO 80305-6008
Document Number	0003761432
Instrument Date	Jan 24, 2019
Transaction Type	Mortgage
Record Updated	Feb 5, 2020
Title Company	NOT AVAILABLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	440 S 43RD ST BOULDER CO 803056008, BOULDER, CO 80305-6008

Mortgage

Document Number	0003761432
Date	Jan 21, 2020
Instrument	3761432

Lender

Name	ZIONS BANCORPORATION NA
Address	BOULDER, CO 80302

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	360 Months
Due	Jan 20, 2050

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

The 2025 property tax bill for 440 S 43rd St was $6,220.

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		$66,225 (+1.5%) Land $32,749 Building $33,476	$1,043,900 (-) Land $551,600 Building $492,300
2025	$6,220.00	$65,244 Land $34,475 Building $30,769	$1,043,900 Land $551,600 Building $492,300
2023	$5,845.00 (+12.4%)	$71,368 (+27.45%) Land $40,401 Building $30,967	$1,065,200 (+32.21%) Land $603,000 Building $462,200
2022	$5,200.00	$55,996 Land $29,961 Building $26,035	$805,700 Land $431,100 Building $374,600

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

FEMA maps place 440 S 43rd St in Zone X, an area of minimal flood risk, though there have been 7 flood claims nearby since 1979.

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

Wildfire risk around 440 S 43rd St is low, with a 0.01% annual chance of 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	0.01% 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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