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Single Family ResidenceResidential
$611,053$239 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 97How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $610,000 on May 1, 2026

1734 QUARTZ ST

CASTLE ROCK, CO 80109
4
Beds
4
Baths
2,560 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
2006
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
3
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$611K
$596K low$627K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$610,000 · May 1, 2026
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$123,053
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$98,442
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.80%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$488,000
LOWER LLC · recorded May 1, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,209 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$41,280 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$9,350
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$31,930
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$44,050
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$607,166

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.52
37
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
53
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
66
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
29
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
75
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.7 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyDOUGLAS
Lot (acres)The size of the land the home sits on, from county records.0.11
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Concrete
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 104 ft²

Transaction History(10)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(1)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Clear Sky Elementary SchoolB-
Elementary · Grades KG–6 · 0.2 mi
M
Castle Rock Middle SchoolC
Middle · Grades 7–8 · 1.8 mi
H
Castle View High SchoolA
High · Grades 9–12 · 2.0 mi

District: Douglas County School District Re-1

Neighborhood · ZIP 80109These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.40
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.98
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.39

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.43%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.1%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.28,679
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,098 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$140,152
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$166,618
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.19 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.69%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

1734 Quartz St measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth less than 72% of homes in Douglas County
  • Costs less per square foot than 80% of homes in Douglas County
  • Has a smaller lot than 85% of homes in Douglas County
  • Newer than 67% of homes in Douglas County

What homes are worth in Castle Rock 80109

Each bar is how many homes fall in that price range. The marker is this home.

This home
$425K$1.6M

This home is worth more than 34% of homes in Castle Rock 80109.

How it measures up in Castle Rock 80109

The dot is this home. The mark in the middle is the typical home in Castle Rock 80109.

Estimated value$611,053
CheaperTypical $677,952Pricier

Pricier than 34% of homes nearby

Price per ft²$239
CheaperTypical $267Pricier

Pricier than 29% of homes nearby

Living area2,560 ft²
SmallerTypical 2,603 ft²Bigger

Bigger than 48% of homes nearby

Lot size0.11 ac
SmallerTypical 0.15 acBigger

Bigger than 20% of homes nearby

Year built2006
OlderTypical 2006Newer

Newer than 52% of homes nearby

How 1734 Quartz St ranks against every home in each area.
MeasureThis homeThe MeadowsCastle Rock 80109Douglas County
Estimated valuepricier than$611,05338% of homes34% of homes28% of homes
Price per ft²pricier than$23930% of homes29% of homes20% of homes
Living areabigger than2,560 ft²51% of homes48% of homes48% of homes
Lot sizebigger than0.11 ac21% of homes20% of homes15% of homes
Year builtnewer than200648% of homes52% of homes67% of homes

About 1734 Quartz St

How much is 1734 Quartz St, Castle Rock, CO worth?

The TopHap Estimate for 1734 Quartz St, Castle Rock, CO is $611,053 as of Jul 14, 2026. The likely range is $595,514 to $626,592. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1734 Quartz St, Castle Rock, CO last sell?

1734 Quartz St, Castle Rock, CO last sold on May 1, 2026 for $610,000, according to the county's recorded deed. TopHap holds 7 recorded sales for this parcel.

How big is 1734 Quartz St, Castle Rock, CO?

1734 Quartz St, Castle Rock, CO has 4 bedrooms, 4 bathrooms, 2,560 square feet of living space and a 0.11-acre lot.

When was 1734 Quartz St, Castle Rock, CO built?

1734 Quartz St, Castle Rock, CO was built in 2006, making it 20 years old. The building has 2 stories.

What schools serve 1734 Quartz St, Castle Rock, CO?

1734 Quartz St, Castle Rock, CO is assigned to Clear Sky Elementary School (elementary), rated B-; Castle Rock Middle School (middle), rated C; Castle View High School (high), rated A. All sit in Douglas County School District Re-1. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1734 Quartz St, Castle Rock, CO compare to other homes in Castle Rock 80109?

Among the 9,181 homes in Castle Rock 80109, it is worth more than 34% of them ($611,053 against a typical $677,952), its price per square foot is higher than 29% of them ($239 against a typical $267), it is bigger than 48% of them (2,560 ft² against a typical 2,603 ft²), its lot is bigger than 20% of them (0.11 ac against a typical 0.15 ac) and it is newer than 52% of them (2006 against a typical 2006). Measured against all of Douglas County, it is worth more than 28% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 1734 Quartz St, Castle Rock, CO?

The 2024 property tax bill for 1734 Quartz St, Castle Rock, CO was $4,209. The county assessed it at $41,280.

Closest homes

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Assigned schools

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