Idaho local data guide

How to Calculate After-Repair Value (ARV) for an Idaho Property

After-Repair Value (ARV) is the estimated market value of a property once all planned renovations are complete. In Idaho, calculating ARV requires using local Multiple Listing Service (MLS) data rather than public tax records, as the state's non-disclosure laws prevent universal public access to accurate sales price information.

Updated with grounded research as of 2026-07-21.

The short answer

To calculate the After-Repair Value (ARV) in Idaho, you must determine the estimated market price a property will command after renovations. Because Idaho is a non-disclosure state, public records are often insufficient for accurate valuation. Investors must rely on verified comparable sales (comps) from the Intermountain MLS (IMLS) to ensure the data reflects actual closed transaction prices rather than estimated market values.

Key facts

Idaho Non-Disclosure Status
Idaho does not require sales prices to be reported to county assessors, making private broker databases like the Intermountain MLS (IMLS) the most reliable source for property valuations.
Primary Valuation Methodology
ARV is calculated by analyzing the closed sale prices of fully renovated properties that share similar square footage, location, and characteristics with the subject property.

Navigating Idaho's Non-Disclosure Environment

In many states, sales data is public record. Idaho's status as a non-disclosure state changes the research process. County tax records may list the property owner but often omit the actual transaction price. Consequently, relying on third-party public sites for valuation can lead to significant errors.

  • Always prioritize data sourced directly from the Intermountain MLS (IMLS).
  • Consult with a licensed Idaho real estate agent who has access to private, historical sales data.
  • Avoid using automated valuation models (AVMs) that rely exclusively on public assessor records.

Selecting Comparable Properties (Comps)

The accuracy of your ARV depends entirely on the quality of your comparables. You should identify at least three properties that have sold within the last 3–6 months that represent the 'after' state you intend to achieve.

  • Proximity: Select homes within the same neighborhood or school district.
  • Similarity: Match properties with similar bed/bath counts and square footage.
  • Renovation Level: Ensure the comps reflect the quality of finish you are planning for your project.

Accounting for Market Variables

ARV is a forward-looking estimate, not a guaranteed outcome. Idaho real estate markets, particularly in urban corridors like the Treasure Valley or Coeur d'Alene, can fluctuate based on regional economic shifts and interest rate changes.

  • Monitor days-on-market for comps to assess liquidity.
  • Adjust your ARV calculation if the neighborhood trend is currently cooling.
  • Factor in the 'cost-plus-value' reality: Renovation costs do not always equate to a dollar-for-dollar increase in market value.

Common questions

Why can't I just use tax assessor data to find ARV?

In Idaho, tax assessor data often excludes the final sale price of a property. Using this incomplete data will lead to an inaccurate valuation that does not reflect true market demand.

How do I find a real estate agent who can help with ARV?

Look for agents who specialize in 'investment' or 'fix-and-flip' properties. You can verify their experience by asking for a CMA (Comparative Market Analysis) for a local property you are researching.

Related Idaho questions

  • How do I find a real estate agent in Idaho who can provide a CMA?
  • What is the 70% rule in real estate flipping?
  • How do I verify repair costs for a fix-and-flip project in Idaho?

Sources and verification