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Single Family ResidenceResidential
$475,550$256 / 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 Sep 24, 2026
Last sold for $315,000 on Aug 26, 2016

663 SIMMER WAY

RIO VISTA, CA 94571
4
Beds
2.5
Baths
1,859 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.
0.12 ac
Lot SizeThe size of the land the home sits on, from county records.
1997
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
8
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

$476K
$462K low$489K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$315,000 · Aug 26, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,923 (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.$372,888 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$88,781
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$284,107
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$365,578
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$495,270

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountySOLANO
Lot (acres)The size of the land the home sits on, from county records.0.12
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
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(7)

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

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

E
D. H. White Elementary SchoolD+
Elementary · Grades KG–5 · 0.5 mi
H
Rio Vista High SchoolD
High · Grades 9–12 · 1.2 mi
M
Riverview Middle SchoolC
Middle · Grades 6–8 · 1.4 mi

District: River Delta Joint Unified School District

Neighborhood · ZIP 94571These 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.139
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.78
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.300

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.10,336
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.83 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$82,846
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$99,838
Average tempThe average temperature here across a full year.60°F
Annual precipHow much rain and melted snow falls here in a typical year.17 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

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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

663 Simmer Way 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 Solano County
  • Costs less per square foot than 92% of homes in Solano County
  • Bigger than 67% of homes in Rio Vista 94571
  • Has a smaller lot than 72% of homes in Solano County
  • Older than 76% of homes in Rio Vista 94571

What homes are worth in Rio Vista 94571

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

This home
$305K$685K

This home is worth more than 67% of homes in Rio Vista 94571.

How it measures up in Rio Vista 94571

The dot is this home. The mark in the middle is the typical home in Rio Vista 94571.

Estimated value$475,550
CheaperTypical $443,539Pricier

Pricier than 67% of homes nearby

Price per ft²$256
CheaperTypical $266Pricier

Pricier than 39% of homes nearby

Living area1,859 ft²
SmallerTypical 1,644 ft²Bigger

Bigger than 67% of homes nearby

Lot size0.12 ac
SmallerTypical 0.13 acBigger

Bigger than 35% of homes nearby

Year built1997
OlderTypical 2004Newer

Newer than 24% of homes nearby

How 663 Simmer Way ranks against every home in each area.
MeasureThis homeRio Vista 94571Solano County
Estimated valuepricier than$475,55067% of homes28% of homes
Price per ft²pricier than$25639% of homes8% of homes
Living areabigger than1,859 ft²67% of homes62% of homes
Lot sizebigger than0.12 ac35% of homes28% of homes
Year builtnewer than199724% of homes75% of homes

About 663 Simmer Way

How much is 663 Simmer Way, Rio Vista, CA worth?

The TopHap Estimate for 663 Simmer Way, Rio Vista, CA is $475,550 as of Sep 24, 2026. The likely range is $462,459 to $488,641. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 663 Simmer Way, Rio Vista, CA last sell?

663 Simmer Way, Rio Vista, CA last sold on Aug 26, 2016 for $315,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 663 Simmer Way, Rio Vista, CA?

663 Simmer Way, Rio Vista, CA has 4 bedrooms, 2.5 bathrooms, 1,859 square feet of living space and a 0.12-acre lot.

When was 663 Simmer Way, Rio Vista, CA built?

663 Simmer Way, Rio Vista, CA was built in 1997, making it 29 years old. The building has 3 stories.

What schools serve 663 Simmer Way, Rio Vista, CA?

663 Simmer Way, Rio Vista, CA is assigned to D. H. White Elementary School (elementary), rated D+; Rio Vista High School (high), rated D; Riverview Middle School (middle), rated C. All sit in River Delta Joint Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 663 Simmer Way, Rio Vista, CA compare to other homes in Rio Vista 94571?

Among the 5,295 homes in Rio Vista 94571, it is worth more than 67% of them ($475,550 against a typical $443,539), its price per square foot is higher than 39% of them ($256 against a typical $266), it is bigger than 67% of them (1,859 ft² against a typical 1,644 ft²), its lot is bigger than 35% of them (0.12 ac against a typical 0.13 ac) and it is newer than 24% of them (1997 against a typical 2004). Measured against all of Solano 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 663 Simmer Way, Rio Vista, CA?

The 2025 property tax bill for 663 Simmer Way, Rio Vista, CA was $3,923. The county assessed it at $372,888.

More homes on Simmer Way

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