Idaho local data guide

Estimating After-Repair Value (ARV) for BRRRR Properties in Idaho

After-Repair Value (ARV) is the projected market value of a property once all planned renovations are complete. For BRRRR (Buy, Rehab, Rent, Refinance, Repeat) investors in Idaho, accurately estimating ARV is critical for determining maximum allowable offers and ensuring loan-to-value ratios meet lender requirements. Because Idaho is not a 'full-disclosure' state, public access to exact sales prices can be more limited than in other regions, making the use of professional appraisal methods and reliable, recent comparable sales (comps) essential.

Updated with grounded research as of 2026-10-03.

The short answer

To accurately estimate the After-Repair Value (ARV) for a BRRRR project in Idaho, you must look beyond your renovation costs and focus on what the local market will support. Since Idaho is not a 'full-disclosure' state, rely on the Sales Comparison Approach (SCA) using verified data from local real estate professionals to avoid the pitfalls of incomplete public records.

Key facts

Primary ARV Methodology
The most reliable method is the Sales Comparison Approach (SCA), which involves analyzing at least 3-5 recently sold, renovated properties (comps) that share similar characteristics—such as square footage, age, location, and condition—to the subject property in its intended, finished state.
Idaho Market Nuance
Idaho is not a 'full-disclosure' state. While this affects the public availability of some real estate data, state assessors determine market value using the Cost, Sales Comparison, and Income approaches. Investors should supplement online tools (Zillow/Redfin) with data from local real estate agents or professional appraisals to ensure accuracy.
Standard Selection Criteria
Comps should ideally be located within one mile of the subject property, share similar physical characteristics (beds, baths, square footage, age), and have closed within the last 6 months. Avoid using properties separated by major barriers like freeways or railroads.

Understanding Idaho's Non-Disclosure Status

As of October 2026, Idaho remains a non-disclosure state regarding real estate transaction prices. This means that private sale prices are not always public record, which can complicate the data-gathering process for investors who are accustomed to accessing unrestricted sale data.

Because of this, relying solely on automated valuation models (AVMs) provided by public real estate websites can be risky. These tools often lack the specific, private sale data needed to create a truly accurate ARV. It is industry best practice in Idaho to verify your estimates by cross-referencing your data with a local real estate agent who has access to the Intermountain Multiple Listing Service (IMLS) or by commissioning a professional appraisal.

Applying the Sales Comparison Approach (SCA)

  • Select 3-5 'comps' that are as similar to your finished project as possible.
  • Prioritize properties that have sold within the last 6 months to ensure the data reflects the current market cycle.
  • Keep the geographic radius tight (typically within one mile) and avoid crossing major neighborhood boundaries like highways, industrial zones, or different school districts, which can significantly alter value.
  • Adjust the final number based on specific amenity differences (e.g., if your property has a two-car garage and the comp only has a carport, you must add value to the comp's sale price to compare it fairly).

Avoiding Common ARV Pitfalls

A common mistake for newer investors is calculating ARV by adding the cost of renovations to the purchase price. This is not how the market works. ARV is determined by what a future buyer or appraiser will pay for the property in its completed state, regardless of how much you spent on the rehab.

Always treat your ARV as a projection rather than a certainty. Market fluctuations and unexpected renovation cost overruns can quickly erode your margin. Using a conservative estimate for your ARV and vetting it against a professional opinion is a critical safety step in any BRRRR strategy.

Common questions

How does the non-disclosure status of Idaho affect real estate data access?

Because Idaho does not mandate the public disclosure of real estate transaction prices, public datasets may be incomplete. Investors often find that reliable, granular data requires a partnership with a local real estate professional who has access to the local MLS.

Is the 70% rule a reliable way to calculate ARV?

No. The 70% rule (buying for 70% of ARV minus rehab costs) is a high-level screening tool to help you decide if a deal is worth investigating further. It is not a professional valuation method and should never replace detailed analysis.

Related Idaho questions

  • What is the difference between a comparative market analysis (CMA) and a professional appraisal in Idaho?
  • How do I find a reliable real estate agent to help with comps for BRRRR deals in Idaho?

Sources and verification