Recipe: Property research

End-to-end property research from a single address. Returns valuation, tax history, market context, and flood risk.

Tools used: housing_property_report (compound) or attom_avm, attom_tax_history, altos_market_stats, fema_flood_zone.

Calls: 1 (compound) or 4 (manual).

Fast path

housing_property_report({ address: "123 Main St, Denver, CO 80202" })

Returns:

{
  "address": "123 Main St, Denver, CO 80202",
  "valuation": {
    "avm":       687000,
    "confidence_band": [661000, 712000],
    "last_sale": { "date": "2021-06-14", "price": 545000 },
    "characteristics": { "sqft": 2150, "beds": 3, "baths": 2.5, "year_built": 1998 }
  },
  "tax_history": [...],
  "neighborhood_market": {
    "median_list_price": 695000,
    "days_on_market": 22,
    "price_reductions_pct": 14
  },
  "flood": { "fema_zone": "X", "risk": "minimal" }
}

One call wraps ATTOM AVM + ATTOM tax + Altos market + FEMA flood — needs ATTOM and Altos keys (or a Housing Vertical subscription).

Manual path

If you want fine control or only have some keys:

attom_avm({ address1: "123 Main St", address2: "Denver, CO 80202", _apiKey: "..." })
attom_tax_history({ address1: "123 Main St", address2: "Denver, CO 80202", _apiKey: "..." })
altos_market_stats({ region: "us-co-denver", _apiKey: "..." })
fema_flood_zone({ address: "123 Main St, Denver, CO 80202" })

fema_flood_zone is free; the others are BYO key (or vertical-bundled).

Citation pattern

123 Main St, Denver — ATTOM AVM $687K (band $661K–$712K, last sold 2021-06 at $545K). Single-family, 2,150 sqft, 3/2.5. Neighborhood: median list $695K, 22 days on market, 14% price reductions per Altos. FEMA flood zone X (minimal risk).

Caveats

AVM band is the honest answer. A point estimate without the band is misleading. Always carry both.
Tax history is yearly. Pulled from county records via ATTOM. Recent reassessments may not be reflected for 6–12 months.
Neighborhood vs. property-specific. Altos gives metro/ZIP-level stats. ATTOM gives the property. Both matter.
Comps would be a useful addition. attom_comps with this address returns nearby recent sales — call it as step 5 if you need pricing context.

Use the prompt

prompts/get({
  name: "property_research",
  arguments: { address: "123 Main St, Denver, CO 80202" }
})

Returns a substituted prompt that runs the full sequence and concludes with whether a list price is data-supported.