The data that answers it

Ranked by fit · best first
HouseCanary Primary fit
HouseCanary Analytics API

HouseCanary's Property/TaxHistory returns assessment_year and total_assessed_value, defined as county-roll land plus improvements, for a buyer-selected address. It does not separately document land and improvement components, assessing jurisdiction, valuation method, currency, release/index-through date, or query timestamp.

Paid APIBatch enrichment National US 9 fields
Precisely Primary fit
Precisely Property Information API

Precisely's address-keyed Property Information API returns assessedValue and assessedValueImp for U.S. residential and commercial properties, including batch address requests. It documents total and improvement assessed values but not land value, assessment year, assessing jurisdiction, valuation basis, currency, source release/index-through date, or query timestamp.

Paid APIBatch enrichment National US 2 fields
PropertyRadar Primary fit
PropertyRadar Property and Owner Data API

PropertyRadar returns AssessedValue, defined as total taxable land plus improvements, and AssessedYear for a buyer-selected property. The cited response does not separately expose land and improvement components, value basis, assessing jurisdiction, currency, release/index-through date, or query timestamp.

Paid APIBatch enrichment National US 14 fields
Realie Primary fit
Realie Bulk Property Data

The standing v3 bulk schema emits yearly assessor land, building/improvement, total and market values with assessment and market-value years for a stable parcel key.

Paid Full file National US 1 field
Regrid Primary fit
Regrid Parcel API

Regrid returns assessor-sourced landval, improvval, parval total value, parvaltype value basis, and taxyear for a selected parcel, with dollar units documented for the value components. These fields satisfy the core component/year pins, but the citation does not establish a per-record assessing-jurisdiction label, source release/index-through date, or query timestamp.

Paid APIFull file Multi-country 12 fields
RentCast Primary fit
RentCast Property Data API

RentCast returns yearly taxAssessments entries with total value, land, and improvements for a buyer-selected address, together with stable property/assessor identifiers. It pins component values and assessment year, but the cited schema does not define valuation basis, assessing-jurisdiction provenance, currency, release/index-through date, or query timestamp.

Free API National US 11 fields

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