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Single Family ResidenceResidential
$759,257$537 / 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 84How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $750,000 on Jan 27, 2026

9121 HELMS AVE

RANCHO CUCAMONGA, CA 91730
4
Beds
2
Baths
1,414 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.
0.21 ac
Lot SizeThe size of the land the home sits on, from county records.
1977
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$759K
$636K low$882K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$750,000 · Jan 27, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,664 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$355,495 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$124,424
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$231,071

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Modern
CountySAN BERNARDINO
Lot (acres)The size of the land the home sits on, from county records.0.21
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.Composition Shingle
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(8)

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(3)

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

M
Rancho Cucamonga Middle SchoolB-
Middle · Grades 6–8 · 0.9 mi
E
Los Amigos Elementary SchoolC+
Elementary · Grades KG–5 · 1.3 mi
H
Chaffey High SchoolC-
High · Grades 9–12 · 3.1 mi

District: Chaffey Joint Union High School District

Neighborhood · ZIP 91730These 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.95
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.106
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.446

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.4%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.70,900
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,102 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$83,634
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$107,551
Average tempThe average temperature here across a full year.64°F
Annual precipHow much rain and melted snow falls here in a typical year.18 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.68%

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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

9121 Helms Ave 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 more than 94% of homes in Southwest Rancho Cucamonga
  • Costs more per square foot than 96% of homes in San Bernardino County
  • Has a bigger lot than 91% of homes in Southwest Rancho Cucamonga

What homes are worth in Rancho Cucamonga 91730

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

This home
$344K$950K

This home is worth more than 87% of homes in Rancho Cucamonga 91730.

How it measures up in Rancho Cucamonga 91730

The dot is this home. The mark in the middle is the typical home in Rancho Cucamonga 91730.

Estimated value$759,257
CheaperTypical $626,272Pricier

Pricier than 87% of homes nearby

Price per ft²$537
CheaperTypical $410Pricier

Pricier than 91% of homes nearby

Living area1,414 ft²
SmallerTypical 1,443 ft²Bigger

Bigger than 46% of homes nearby

Lot size0.21 ac
SmallerTypical 0.13 acBigger

Bigger than 90% of homes nearby

Year built1977
OlderTypical 1986Newer

Newer than 36% of homes nearby

How 9121 Helms Ave ranks against every home in each area.
MeasureThis homeSouthwest Rancho CucamongaRancho Cucamonga 91730San Bernardino County
Estimated valuepricier than$759,25794% of homes87% of homes83% of homes
Price per ft²pricier than$53794% of homes91% of homes96% of homes
Living areabigger than1,414 ft²59% of homes46% of homes38% of homes
Lot sizebigger than0.21 ac91% of homes90% of homes61% of homes
Year builtnewer than197737% of homes36% of homes38% of homes

About 9121 Helms Ave

How much is 9121 Helms Ave, Rancho Cucamonga, CA worth?

The TopHap Estimate for 9121 Helms Ave, Rancho Cucamonga, CA is $759,257 as of Aug 30, 2026. The likely range is $636,396 to $882,118. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9121 Helms Ave, Rancho Cucamonga, CA last sell?

9121 Helms Ave, Rancho Cucamonga, CA last sold on Jan 27, 2026 for $750,000, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 9121 Helms Ave, Rancho Cucamonga, CA?

9121 Helms Ave, Rancho Cucamonga, CA has 4 bedrooms, 2 bathrooms, 1,414 square feet of living space and a 0.21-acre lot.

When was 9121 Helms Ave, Rancho Cucamonga, CA built?

9121 Helms Ave, Rancho Cucamonga, CA was built in 1977, making it 49 years old. It is a modern home. The building has 1 story.

What schools serve 9121 Helms Ave, Rancho Cucamonga, CA?

9121 Helms Ave, Rancho Cucamonga, CA is assigned to Rancho Cucamonga Middle School (middle), rated B-; Los Amigos Elementary School (elementary), rated C+; Chaffey High School (high), rated C-. All sit in Chaffey Joint Union High School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 9121 Helms Ave, Rancho Cucamonga, CA compare to other homes in Rancho Cucamonga 91730?

Among the 16,261 homes in Rancho Cucamonga 91730, it is worth more than 87% of them ($759,257 against a typical $626,272), its price per square foot is higher than 91% of them ($537 against a typical $410), it is bigger than 46% of them (1,414 ft² against a typical 1,443 ft²), its lot is bigger than 90% of them (0.21 ac against a typical 0.13 ac) and it is newer than 36% of them (1977 against a typical 1986). Measured against all of San Bernardino County, it is worth more than 83% 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 9121 Helms Ave, Rancho Cucamonga, CA?

The 2025 property tax bill for 9121 Helms Ave, Rancho Cucamonga, CA was $3,664. The county assessed it at $355,495.

More homes on Helms Ave

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Assigned schools

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