2436 4th St, Boulder, CO 80304 Property Records

Boulder County property record for 2436 4th St, Boulder, CO 80304

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 1,038 sqft · built 1904
Lot Size	0.128 acres (5,578 sqft)
Owner	2 Individual Names on File
Last Sale	$830,000 (Oct 2018)
Tax Bill	$6,599 (2025)
Deeds & Mortgages	Oct 2018 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`1461-25-P-01-001`

Property Details

APN / Parcel Number

Primary APN	`1461-25-P-01-001`
Alternative APN	`R0610839`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	5 Rooms
Stories	1 Story
Building Area	1,038 sqft Living Area
1st Floor Area	1,038 sqft
Interior Walls	Plaster

Exterior

Year Built	Built 1904
Effective Year Built	Effective 1975
Architectural Style	Ranch
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Lot Area	5,578 sqft (0.128 acres)

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0610839
Street Address	2436 4TH ST
City	BOULDER
State	CO
Zip	80304-3901
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	N 1/2 S 1/2 LOTS 26-30 INC BLK 4 MAPLETON
Legal Range	71
Legal Township	1N
Legal Section	25
Legal Subdivision	MAPLETON - BO
Legal Block	4
Legal Lot Number	26
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	4
Census Block	4004
Census Tract	12101

Owner

Source: Boulder County records · APN 1461-25-P-01-001

Assessment roll updated June 15, 2026 · Last verified June 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	2716 CALMANTE PL, SUPERIOR, CO 80027-4652
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Oct 19, 2018 · Amount on Record
Deed Sale	Oct 19, 2018 · Amount on Record
Deed Document Number	20183681931
Prior Transfer Date	Oct 12, 2018
Prior Transfer Doc	0003681930
Record Updated	Sep 20, 2026

October 2018: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Oct 19, 2018
Property Address	2436 4TH ST, BOULDER, CO 80304-3901
Document Number	0003681931
Instrument Date	Oct 18, 2018
Instrument	3681931
Transaction Type	Transfer
Record Updated	Mar 31, 2022

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$83.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	00000

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1280 S LAIRD CT, SUPERIOR, CO 80027-8056

Mortgage

Document Number	0003681933
Date	Oct 19, 2018
Instrument	3681933

Lender

Name	CITIBANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Nov 01, 2048

Tax Assessment & Valuation

Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified June 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

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.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$74,379 (+8.8%) Land $66,941 Building $7,438	$1,093,800 (-) Land $984,420 Building $109,380
2025	$6,599.00 (+1.88%)	$68,362 (-12.15%) Land $61,526 Building $6,836	$1,093,800 (-5.83%) Land $984,420 Building $109,380
2023	$6,477.00 (+16.96%)	$77,820 (+33.62%) Land $70,038 Building $7,782	$1,161,500 (+38.6%) Land $1,045,350 Building $116,150
2022	$5,538.00	$58,241 Land $52,417 Building $5,824	$838,000 Land $754,200 Building $83,800

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of October 14, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

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	15 units insured incl. 9 condo units
Nearby Flood Claims	2 (2013)
Most Recent Claim	Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides

Wildfire

Wildfire Risk	High above 82% of the US · above 85% of Colorado
Wildfire Likelihood	0.8% annual chance
Exposure	Direct burnable vegetation at the parcel

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.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

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
Live Wire Networks Fixed Wireless	250 / 100
T-Mobile USA Fixed Wireless	100 / 20
AT&T Fixed Wireless	100 / 20

May also be available: Verizon.

Based on FCC filings for 684 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	CITY OF BOULDER serves 166,080 people
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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.