OpenAI (synthesis)
Official sourceThe AI model that synthesizes each report from the authoritative sources above.
About our data
Where Ampian AI’s data comes from
Last reviewed:
Our products are AI-synthesized from the authoritative sources listed below. We do not invent numbers — every report is built by an AI model that reads and combines these real, named data sources for your specific address.
01 · Homeownership costs
For the True Cost Forecaster
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US Census ACS + state property-tax rules
Property-tax rates from Census data, with homestead exemptions from each state's rules and a few local ones.
2020-2024 Census release + our state-rules table
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US Treasury FIO + construction cost
Homeowners-insurance estimate calibrated to rebuild cost.
2018-2022 Treasury data, adjusted to today, plus 2024 building costs
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EIA + DOE RECS (electricity)
Electricity cost model from federal energy data.
Utility rates: U.S. Electric Utility Companies and Rates by ZIP Code (2024), NREL / OpenEI · CC BY 4.0
2024 rates + 2020 household survey
EIA updates electricity data annually
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EIA natural gas prices
Natural-gas cost from the federal monthly residential gas price for your state.
March 2026 prices
EIA updates gas prices monthly
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EIA + DOE RECS (heating oil)
How much heating oil a home uses, from federal household energy data (RECS 2020).
2020 household survey + estimated regional oil prices
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Local water-utility rates
Water and sewer costs based on local utility rates.
2026 local rates, or averages where unavailable
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BLS wage index
Landscaping-labor cost from the Bureau of Labor Statistics wage index.
May 2024 wages
BLS updates annually
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DOE/IECC climate zones
Climate normalization so cost models reflect local conditions.
1991-2020 climate normals
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Capex & maintenance cost models
Pool upkeep, snow removal, and major-system replacement reference costs.
Our cost tables (curated March 2026) from published cost guides and federal wage data
Built in-house
02 · Zoning, risk & neighborhood
For the Zoning Oracle
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Zoneomics
Current zoning and land-use classification, with the uses the zoning permits.
Live at each report
Vendor-maintained
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FEMA NFHL
Regulatory flood-zone determination from the National Flood Hazard Layer.
Live at each report
FEMA adds new maps continuously
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FEMA National Risk Index
Composite and per-hazard natural-risk ratings for the location.
v1.20 (Dec 2025), live at each report
New versions every few years
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USFS Wildfire Hazard Potential
Modeled wildfire hazard class, part of Wildfire Risk to Communities.
2023 version, live at each report
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GreatSchools
School ratings and quality signals for the surrounding area.
Live at each report
Ratings updated through the year
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FHFA House Price Index
Home-appreciation trends over recent 5- and 10-year windows.
Through 2025 (ZIP)
FHFA updates annually/quarterly
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US Census ACS
American Community Survey home values and neighborhood-change signals.
2019-2023 and 2020-2024 releases
Census updates annually
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Nearby development news (AI)
Recent development news retrieved by AI over curated, reputable press and news sources.
News from the past 12 months, searched at each report
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US Census geographies (TIGER)
Census tract and geography resolution for the address.
Census current geography, live at each report
Updated at least annually
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Overture Maps
Public-transit stop locations near the address, built on OpenStreetMap data (© OpenStreetMap contributors, ODbL).
June 2026 release
Overture updates monthly
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USDA SNAP Retailer Locator
Locations of nearby supermarkets and super stores.
August 2026 snapshot
USDA updates every 2 weeks
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August 2026 download
GeoNames updates daily
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HUD Fair Market Rents
Area rent benchmarks used as a rentability signal.
FY2026 rents
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Nominatim / OpenStreetMap
Pinpoints your address on the map so every source looks up the right spot.
Live at each report
OpenStreetMap updates every minute
04 · Limits
What we do not claim
- An Ampian AI report is not an appraisal, a home inspection, or financial, legal, tax or real-estate advice.
- Costs are low-to-high estimates, not bills or quotes. Your assessor sets your tax bill, and your insurer sets your premium.
- We do not see inside the house: the home's size, age and major systems come from what you enter.
- Home-value trends show how prices in the area changed in the past; they are not a forecast of what a home will be worth.
- Hazard ratings are a first look, not a final word. We check the flood zone for your exact lot, but wildfire and other natural-hazard ratings describe the surrounding area, not your specific home.
- We show current zoning and permitted uses, not building permits or rezoning proposals. Nearby development items are news stories found by AI, not official records.
- Nearby schools are schools near the address, not the schools a home is assigned to.
- The Zoning Oracle's Final Verdict rates six things, the same way for every address: home-price growth, rent potential, neighborhood trends, climate risk, nearby development, and school trends.
- The Final Verdict says nothing about things outside those six areas, such as the home's condition, so it isn't an overall judgment of the property.
- Where a source has no data for an address, the report shows N/A, never a made-up number.