511 Marine St, #A, Boulder, CO 80302 Property Records

Boulder County property record for 511 Marine St, #A, Boulder, CO 80302

Property Summary

Property Type	Single Family Home
Details	3 bd · 2.25 ba · 2,700 sqft · built 1895
Lot Size	0.235 acres (10,217 sqft)
Owner	2 Individual Names on File
Last Sale	$1,525,000 (Apr 2016)
Tax Bill	$16,207 (2025)
Flood Zone	Zone X (minimal risk)
APN	`1461-36-1-02-020`

Property Details

APN / Parcel Number

Primary APN	`1461-36-1-02-020`
Alternative APNs	`R0005228` `0005228`

Interior

Bedrooms	3 Beds
Full Baths	2.25 Baths
Half Baths	2 Half Baths
Total Rooms	8 Rooms
Stories	2 Stories
Building Area	2,700 sqft Living Area
Gross Area	2,780 sqft
1st Floor Area	1,137 sqft
Upper Floors Area	645 sqft
Basement Area	918 sqft
Finished Basement	918 sqft
Interior Walls	Plaster

Exterior

Year Built	Built 1895
Effective Year Built	Effective 1987
Architectural Style	Multi-Level
Exterior Material	Combination
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	10,217 sqft (0.235 acres)
Garage Type	Detached
Garage Area	600 sqft
Porch	Enclosed Porch
Porch Area	340 sqft
Total Buildings	2 Buildings

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0005228
Street Address	511 MARINE ST, A
City	BOULDER
State	CO
Zip	80302-5832
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	E 1/2 S 1/2 LOT 5 BLK B HIGHLAND LAWN
Legal Range	71
Legal Township	1N
Legal Section	36
Legal Subdivision	HIGHLAND LAWN - BO
Legal Block	B
Legal Lot Number	5
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	2
Census Block	2003
Census Tract	12201

Owner

Source: Boulder County assessment roll, APN 1461-36-1-02-020, as of 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	511 MARINE ST, BOULDER, CO 80302-5832
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Apr 22, 2016 · Amount on Record
Deed Sale	Apr 22, 2016 · Amount on Record
Prior Sale	Sep 03, 1998 · Amount on Record
Deed Document Number	20163513487
Record Updated	Sep 20, 2026

Tax Assessment & Valuation

Source: Boulder County assessment roll as of 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		$184,933 (+8.8%) Land $103,258 Building $81,675	$2,719,600 (-) Land $1,518,500 Building $1,201,100
2025	$16,207.00 (+6.83%)	$169,975 (-5.23%) Land $94,906 Building $75,069	$2,719,600 (+1.59%) Land $1,518,500 Building $1,201,100
2023	$15,171.00 (+16.55%)	$179,359 (+27.95%) Land $99,013 Building $80,346	$2,677,000 (+32.73%) Land $1,477,800 Building $1,199,200
2022	$13,017.00	$140,175 Land $72,294 Building $67,881	$2,016,900 Land $1,040,200 Building $976,700

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Boulder County (08013C), as of October 14, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 080130122012, as of September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 26 individual policies
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	41 units insured incl. 15 condo units
Nearby Flood Claims	19 (1983–2014)
Claims Outside the SFHA	7 of 19
Most Recent Claim	Jul 2014 · rainfall accumulation
Claims by Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 14 claims

Wildfire

Wildfire Risk	High above 77% of the US · above 77% of Colorado
Wildfire Likelihood	0.4% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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, 331 locations within half a mile, as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Ayva Fixed Wireless	2,500 / 2,500
Xfinity Cable	2,000 / 250
Live Wire Networks Fixed Wireless	250 / 100
T-Mobile USA Fixed Wireless	100 / 20

May also be available: Lumen Technologies, Verizon.

Drinking Water

Source: EPA Safe Drinking Water Information System, water system CO0107152, 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.