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

Boulder County property record for 650 S 43rd St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	4 bd · 2 ba · 1,976 sqft · built 1959
Lot Size	0.164 acres (7,140 sqft)
Owner	2 Individual Names on Record
Last Sale	$1,050,000 (Sep 2022)
Tax Bill	$6,070 (2025)
Deeds & Mortgages	Sep 2023 Transfer Sep 2022 Sale & Line of Credit
Flood Zone	Zone X (minimal risk)
APN	`1577-08-1-04-011`

Property Details

APN / Parcel Number

Primary APN	`1577-08-1-04-011`
Alternative APNs	`R0014230` `0014230`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,976 sqft Living Area
Gross Area	2,300 sqft
1st Floor Area	1,040 sqft
Basement Area	1,040 sqft
Finished Basement	936 sqft
Unfinished Basement	104 sqft

Exterior

Year Built	Built 1959
Effective Year Built	Effective 2005
Architectural Style	Ranch
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	7,140 sqft (0.164 acres)
Garage Type	Attached
Garage Area	220 sqft
Parking Spaces	2 Parking Spaces
Porch	Porch
Porch Area	155 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0014230
Street Address	650 S 43RD ST
City	BOULDER
State	CO
Zip	80305-6012
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 11 BLK 4 MARTIN ACRES 3
Legal Subdivision	MARTIN ACRES 3 - BO
Legal Block	4
Legal Lot Number	11
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3002
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	2 Individual Names on Record
Mailing Address	650 S 43RD ST, BOULDER, CO 80305-6012
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Date	Document
Sep 25, 2023	Intrafamily Transfer, Transfer
Sep 22, 2022	Special Warranty Deed, Transfer · Line of Credit ELEVATIONS CU

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 22, 2022 · Amount on Record
Deed Sale	Sep 22, 2022 · Amount on Record
Prior Sale	Aug 20, 2013 · Amount on Record
Deed Document Number	20223982260
Last Transfer Date	Sep 22, 2023
Transfer Doc	0004022796
Record Updated	Sep 20, 2026

September 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	BOULDER CO
Recording Date	Sep 25, 2023
Property Address	650 S 43RD ST, BOULDER, CO 80305-6012
Document Number	0004022796
Instrument Date	Sep 22, 2023
Instrument	4022796
Transaction Type	Transfer
Record Updated	Nov 1, 2023

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	650 SFOUTH 43RD STREET, BOULDER, CO 80305

September 2022: Special Warranty Deed, Transfer

Document Type	Special Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Sep 22, 2022
Property Address	650 S 43RD ST, BOULDER, CO 80305-6012
Document Number	0003982260
Instrument Date	Sep 21, 2022
Instrument	3982260
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	HERITAGE TITLE CO

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$105.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	650 S 43RD ST, BOULDER, CO 80305-6012

Mortgage

Document Number	0003982454
Date	Sep 22, 2022
Instrument	3982454

Lender

Name	ELEVATIONS CU
Type	Credit Union

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

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		$69,264 (+8.8%) Land $32,320 Building $36,944	$1,018,600 (-) Land $475,300 Building $543,300
2025	$6,070.00 (+2.46%)	$63,662 (-11.94%) Land $29,706 Building $33,956	$1,018,600 (-5.6%) Land $475,300 Building $543,300
2023	$5,924.00 (+14.16%)	$72,293 (+29.36%) Land $35,101 Building $37,192	$1,079,000 (+34.19%) Land $523,900 Building $555,100
2022	$5,189.00	$55,885 Land $26,132 Building $29,753	$804,100 Land $376,000 Building $428,100

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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