510 S 40th St, Boulder, CO 80305 Property Records

Boulder County property record for 510 S 40th St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	4 bd · 1.5 ba · 1,426 sqft · built 1959
Lot Size	0.156 acres (6,800 sqft)
Owner	2 Individual Names on File
Last Sale	$288,500 (Aug 2002)
Tax Bill	$4,036 (2025)
Deeds & Mortgages	Sep 2026 Transfer
Flood Zone	Zone X (minimal risk)
APN	`1577-08-1-07-034`

Property Details

APN / Parcel Number

Primary APN	`1577-08-1-07-034`
Alternative APNs	`R0014134` `0014134`

Interior

Bedrooms	4 Beds
Full Baths	1.5 Baths
Half Baths	1 Half Bath
Total Rooms	5 Rooms
Building Area	1,426 sqft Living Area
Gross Area	1,679 sqft
1st Floor Area	1,150 sqft
Basement Area	276 sqft
Finished Basement	276 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1959
Effective Year Built	Effective 1959
Architectural Style	Split Level
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	6,800 sqft (0.156 acres)
Garage Type	Attached
Garage Area	253 sqft
Parking Spaces	1 Parking Space
Patio Area	144 sqft

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0014134
Street Address	510 S 40TH ST
City	BOULDER
State	CO
Zip	80305-5903
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 34 BLK 7 MARTIN ACRES 3
Legal Range	70
Legal Township	1S
Legal Section	05
Legal Subdivision	MARTIN ACRES 3 - BO
Legal Block	7
Legal Lot Number	34
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3005
Census Tract	12508

Owner

510 S 40th St is owned by two individuals who acquired it in September 2026.

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

Owner of Record	2 Individual Names on File
Mailing Address	3353 19TH ST, BOULDER, CO 80304-2302
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

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Aug 12, 2002 · Amount on File
Deed Sale	Aug 12, 2002 · Amount on File
Prior Sale	May 12, 1994 · Amount on File
Deed Document Number	20022318171
Last Transfer Date	Sep 2, 2026
Transfer Doc	0004146166
Record Updated	Oct 29, 2026

September 2026: Transfer on Death Deed, Transfer

Document Type	Transfer on Death Deed
Jurisdiction	BOULDER CO
Recording Date	Sep 2, 2026
Property Address	510 S 40TH ST, BOULDER, CO 80305-5903
Document Number	0004146166
Instrument Date	Sep 2, 2026
Instrument	20264146166
Transaction Type	Transfer
Record Updated	Sep 11, 2026
Title Company	NONE LISTED ON DOCUMENT

Transaction

Tax	$0.00
Amount Accuracy	Full Amount Stated

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3353 19TH ST, BOULDER, CO 80304-2302

Tax Assessment & Valuation

The 2025 property tax bill for 510 S 40th St was $4,036.

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		$40,625 (-2.08%) Land $23,217 Building $17,408	$663,800 (-) Land $407,800 Building $256,000
2025	$4,036.00	$41,488 Land $25,488 Building $16,000	$663,800 Land $407,800 Building $256,000
2023	$3,894.00 (+9.38%)	$47,911 (+27.64%) Land $30,297 Building $17,614	$715,100 (+32.4%) Land $452,200 Building $262,900
2022	$3,560.00	$37,537 Land $22,650 Building $14,887	$540,100 Land $325,900 Building $214,200

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 510 S 40th St in Zone X, an area of minimal flood risk.

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

Wildfire risk around 510 S 40th 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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