Valuation & mass appraisal

Values you can defend at the board

Transparent statistics, not a black box. OpenCAMA IQ produces values you can explain — parcel by parcel and across the whole jurisdiction — with every approach, every model and every assumption open to inspection.

Single-parcel appraisal

Three approaches, one reconciliation

For the parcels that need a careful, individual look, OpenCAMA IQ runs all three classic approaches to value and brings them together in a clear reconciliation — so the indicated value is one you can walk a board member through line by line.

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Sales comparison

Auto-selected comparable sales feed an adjustment grid you can review and override, with each adjustment documented.

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Income capitalization

NOI ÷ cap rate, driven by lease and RPIE data — the right approach for income-producing property.

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Cost

Land value plus depreciated replacement cost of improvements, for new and special-purpose property.

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Reconciliation

A weighted indication across the approaches, plus a tax and transitional-assessment computation preview.

opencamaiq.com / valuation / parcel / 1042-007
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Mass appraisal

A guided wizard for model calibration

Reappraisal at scale doesn't have to be a leap of faith. OpenCAMA IQ walks your analysts through a multi-step regression workflow — each step visible, each result reviewable — so the model that values thousands of parcels is one your office understands and signs off on.

  • Sales extract — pull qualified sales with time adjustment applied to the study window.
  • Design matrix — assemble the variables that drive value into the model.
  • Train / holdback split — set aside a stratified sample to test the model honestly.
  • OLS regression — fit the model and inspect every coefficient.
  • Residuals by zone — find where the model under- or over-predicts geographically.
  • Shrinkage for thin zones — stabilize estimates where sales are sparse.
  • Holdback validation — measure performance against the data the model never saw.
opencamaiq.com / calibration
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Ratio studies & equity

Prove the roll is fair

Uniformity is the standard your roll is judged against. OpenCAMA IQ computes the IAAO-style statistics that demonstrate equity — and stratifies them so you can find and fix pockets of inequity before anyone else does.

  • Median ratio — the central tendency of assessment-to-sale ratios.
  • COD — coefficient of dispersion, the headline measure of uniformity.
  • PRD & PRB — price-related differential and bias, testing vertical equity.
  • COV — coefficient of variation across the study sample.

Stratify every metric by class, neighborhood or value tier, with configurable outlier handling and exportable reports for your oversight body.

opencamaiq.com / ratio-study
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Configurable models

Your analysts drive the model — no code required

Every modeling decision is a setting, not a support ticket. Analysts shape the model to local market knowledge and defend each choice in plain terms.

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Variables & transformations

Choose the predictors that matter, apply transformations, and set expected signs and coefficient limits to keep results sensible.

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Geo-zones

Define the geographic zones the model calibrates within, reflecting how value really varies across the jurisdiction.

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Cap rates & weights

Set capitalization rates for the income approach and reconciliation weights across approaches — all configurable, all transparent.

Auditability

The certified value is the legal record

When values are certified, OpenCAMA IQ takes an immutable snapshot — the legal record of the roll. And every model run snapshots its own inputs, so you can always answer the hardest question at the board: exactly how did we arrive at this number?

  • Certified snapshot — an immutable, point-in-time record of the values you certify.
  • Model-run snapshots — every calibration captures its data, settings and coefficients.
  • Reproducible — re-open any prior run and trace a value to its source.
opencamaiq.com / certify / 2026-roll
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Keep going

Valuation runs on the same roll

Defensible values start with a clean system of record and flow into the programs and workflows that run your office.

Defend your roll with confidence

See single-parcel appraisal, the calibration wizard and IAAO-style ratio studies on data that looks like yours. We'll tailor the walkthrough to your reappraisal cycle.

Request a demo