NOT LISTED FOR SALE

864 18th St Boulder, CO 80302

University Hill Neighborhood

Estimated Value: $1,087,577 - $1,280,000

4 Beds
3 Baths
1,287 Sq Ft
$896/Sq Ft Est. Value

About This Home

This home is located at 864 18th St, Boulder, CO 80302 and is currently estimated at $1,152,894, approximately $895 per square foot. 864 18th St is a home located in Boulder County with nearby schools including Flatirons Elementary School, Manhattan Middle School of the Arts & Academics, and Boulder High School.

Ownership History

Date Name Owned For Owner Type

Purchase Details

Closed on
Oct 31, 2025
Sold by
Hartenstein Olivia L
Bought by
864 18Th Llc
Current Estimated Value
$1,152,894

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$864,000
Outstanding Balance
$864,000
Interest Rate
6.5%
Mortgage Type
New Conventional
Estimated Equity
$288,894

Purchase Details

Closed on
Nov 24, 2020
Sold by
Hartenstein Hugo
Bought by
Hartenstein Olivia L

Purchase Details

Closed on
Nov 2, 2004
Sold by
Westwick John W and Westwick Barbara B
Bought by
Hartenstein Hugo

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$240,000
Interest Rate
4.27%
Mortgage Type
Negative Amortization
Source: Public Records

Range of Values:

--
Value Increase
--
Percent Increase
--
Adjusted for Inflation
Collateral Analytics

Collateral Analytics Collateral Analytics AVMs (Automated Valuation Model) employ a number of statistical approaches combined with neighborhood-specific comparable selection guarantees the most up-to-date and precise valuations.

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ICE

ICE Mortgage Technology ICE Mortgage Technology’s AVM (Automated Valuation Model) is a state-of-the-art online residential property valuation tool that provides a quick and accurate estimate of the value of almost any home in the U.S.

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First American

First American First American Data & Analytics’ next-generation AVM combines unrivaled data assets with a blended ensemble of valuation models to produce highly accurate, reliable valuations you can trust.

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Quantarium

Quantarium Quantarium’s valuation service, repeatedly proven the industry’s most accurate and comprehensive, is supercharged with a self-learning and auto-tuning AI engine that continually becomes smarter and more accurate as it processes daily inputs from the industry’s leading RE data lake.

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Average Value
Not Available
List Price
Sold Price
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Home Values in the Area

Source: Public Records

Average Home Value in this Area

Source: Public Records

Purchase History

Date Buyer Sale Price Title Company
864 18Th Llc $1,080,000 Land Title Guarantee
Hartenstein Olivia L -- None Available
Hartenstein Hugo $444,500 Commonwealth Land Title
Source: Public Records

Mortgage History

Date Status Borrower Loan Amount
Open 864 18Th Llc $864,000
Previous Owner Hartenstein Hugo $240,000
Source: Public Records

Tax History

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2025 $6,322 $70,281 $53,281 $17,000
2024 $6,322 $70,281 $53,281 $17,000
2023 $6,209 $71,033 $54,290 $20,428
2022 $5,653 $60,062 $44,480 $15,582
2021 $5,394 $61,790 $45,760 $16,030
2020 $5,066 $58,202 $38,110 $20,092
2019 $4,989 $58,202 $38,110 $20,092
2018 $4,563 $52,625 $34,128 $18,497
2017 $4,420 $58,179 $37,730 $20,449
2016 $3,652 $42,188 $31,283 $10,905
2015 $3,458 $38,208 $27,860 $10,348
2014 $3,213 $38,208 $27,860 $10,348
Source: Public Records

Map

Colorado Boulder County Boulder 80302 University Hill

864 18th St, Boulder, CO

Not Listed for Sale

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