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Single Family ResidenceResidential
$727,003$312 / 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 98How 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 $518,990 on Aug 17, 2018

309 MAIRS ALY

ALPHARETTA, GA 30004
3
Beds
3.5
Baths
2,328 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.
4,007 ft²
Lot SizeThe size of the land the home sits on, from county records.
2018
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
15
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$727K
$711K low$743K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$518,990 · Aug 17, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,305 (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.$279,680 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$61,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$218,080
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$245,520
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$699,200

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.54
36
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
13
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
86
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
94
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
45
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.0.2 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
StyleThe architectural style of the home, such as ranch or colonial.Townhouse
CountyFULTON
Lot (acres)The size of the land the home sits on, from county records.0.09
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.Neighborhood / Spot
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 148 ft²

Transaction History(1)

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.

M
Hopewell Middle SchoolA+
Middle · Grades 6–8 · 0.2 mi
E
Cogburn Woods Elementary SchoolA+
Elementary · Grades PK–5 · 0.5 mi
H
Cambridge High SchoolA
High · Grades 9–12 · 1.4 mi

District: Fulton County School District

Neighborhood · ZIP 30004These 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.42
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.58

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.41%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.9%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.71,156
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,211 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$154,392
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$188,670
Average tempThe average temperature here across a full year.60°F
Annual precipHow much rain and melted snow falls here in a typical year.55 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.61%

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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

309 Mairs Aly 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 74% of homes in Fulton County
  • Costs more per square foot than 74% of homes in Fulton County
  • Has a smaller lot than 79% of homes in Alpharetta 30004
  • Newer than 95% of homes in Alpharetta 30004

What homes are worth in Alpharetta 30004

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

This home
$305K$2.8M

This home is worth more than 45% of homes in Alpharetta 30004.

How it measures up in Alpharetta 30004

The dot is this home. The mark in the middle is the typical home in Alpharetta 30004.

Estimated value$727,003
CheaperTypical $790,766Pricier

Pricier than 45% of homes nearby

Price per ft²$312
CheaperTypical $281Pricier

Pricier than 68% of homes nearby

Living area2,328 ft²
SmallerTypical 2,800 ft²Bigger

Bigger than 37% of homes nearby

Lot size4,007 ft²
SmallerTypical 0.41 acBigger

Bigger than 21% of homes nearby

Year built2018
OlderTypical 2001Newer

Newer than 95% of homes nearby

How 309 Mairs Aly ranks against every home in each area.
MeasureThis homeAlpharetta 30004Fulton County
Estimated valuepricier than$727,00345% of homes74% of homes
Price per ft²pricier than$31268% of homes74% of homes
Living areabigger than2,328 ft²37% of homes63% of homes
Lot sizebigger than4,007 ft²21% of homes28% of homes
Year builtnewer than201895% of homes93% of homes

About 309 Mairs Aly

How much is 309 Mairs Aly, Alpharetta, GA worth?

The TopHap Estimate for 309 Mairs Aly, Alpharetta, GA is $727,003 as of Sep 24, 2026. The likely range is $711,433 to $742,573. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 309 Mairs Aly, Alpharetta, GA last sell?

309 Mairs Aly, Alpharetta, GA last sold on Aug 17, 2018 for $518,990, according to the county's recorded deed.

How big is 309 Mairs Aly, Alpharetta, GA?

309 Mairs Aly, Alpharetta, GA has 3 bedrooms, 3.5 bathrooms, 2,328 square feet of living space and a 0.09-acre lot.

When was 309 Mairs Aly, Alpharetta, GA built?

309 Mairs Aly, Alpharetta, GA was built in 2018, making it 8 years old. It is a townhouse home. The building has 2 stories.

What schools serve 309 Mairs Aly, Alpharetta, GA?

309 Mairs Aly, Alpharetta, GA is assigned to Hopewell Middle School (middle), rated A+; Cogburn Woods Elementary School (elementary), rated A+; Cambridge High School (high), rated A. All sit in Fulton County School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 309 Mairs Aly, Alpharetta, GA compare to other homes in Alpharetta 30004?

Among the 21,809 homes in Alpharetta 30004, it is worth more than 45% of them ($727,003 against a typical $790,766), its price per square foot is higher than 68% of them ($312 against a typical $281), it is bigger than 37% of them (2,328 ft² against a typical 2,800 ft²), its lot is bigger than 21% of them (4,007 ft² against a typical 0.41 ac) and it is newer than 95% of them (2018 against a typical 2001). Measured against all of Fulton County, it is worth more than 74% 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 309 Mairs Aly, Alpharetta, GA?

The 2025 property tax bill for 309 Mairs Aly, Alpharetta, GA was $7,305. The county assessed it at $279,680.

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