Idaho local data guide

Understanding Property Tax Rates in Ada County ZIP Code 83702

Property tax rates in Ada County, including ZIP code 83702, are not determined by ZIP code alone. Instead, taxes are calculated based on the specific address's location within various taxing districts, meaning bills can vary significantly even for properties in the same neighborhood.

Updated with grounded research as of 2026-10-07.

The short answer

In Ada County, there is no single 'ZIP code tax rate' for 83702. Property taxes are calculated by applying a combined levy rate to a property's taxable value. Because 83702 spans various taxing districts—including the City of Boise, school districts, and special service districts—your final tax obligation depends on the unique combination of these local entities serving your specific address.

Key facts

Tax Calculation Formula
Property taxes are determined by the formula: (Assessed Market Value - Exemptions) × Combined Levy Rate.
Role of Taxing Districts
Your bill is a composite of levies from multiple local government entities, such as the county, city, school district, and specialized districts (e.g., mosquito abatement or cemetery districts).
Official Verification
The Ada County Assessor determines market value, while the Treasurer manages billing. Residents should use the official county lookup tool for specific property tax data.

Why ZIP Codes Don't Dictate Tax Rates

Many homeowners assume that living in a specific ZIP code guarantees a uniform property tax rate, but this is a common misconception in Idaho. ZIP codes are primarily postal designations and do not align with the complex boundaries of local taxing districts.

A property located on one street in 83702 might fall within a different combination of service districts (such as a specific fire or school district) than a property a few blocks away. Consequently, these variations in service coverage lead to different combined levy rates.

The Components of Your Tax Bill

Your annual tax bill is the result of local budgetary requirements. When you review your tax statement, you are essentially paying a proportional share to each entity that provides services to your location.

The 'Combined Levy Rate' represents the sum of all individual rates set by these districts. As districts adjust their budgets annually to meet operational needs, these rates fluctuate, meaning your tax bill can change year-over-year even if your property value remains static.

How to Find Your Specific Tax Information

Because taxes are tied to individual parcels rather than broad geographic areas, the most reliable way to understand your tax obligation is to consult official county records.

As of October 2026, the Ada County Assessor’s office maintains a digital portal that allows property owners to look up tax history and levy information by parcel number or physical address. This is the only method to obtain the precise figures relevant to a home you own or are considering for purchase.

Common questions

How do I apply for the homeowner's exemption in Ada County?

If a property is your primary residence, you may qualify for a homeowner's exemption, which reduces the taxable value of your home. You must apply through the Ada County Assessor’s office, typically by the designated annual deadline.

How can I appeal my property assessment?

If you believe the market value determined by the Ada County Assessor is inaccurate, you have the right to appeal. This process usually involves filing an appeal with the Board of Equalization during the open filing window.

Related Idaho questions

  • How do I apply for the homeowner's exemption in Ada County?
  • What taxing districts are included in my Ada County property tax bill?
  • How can I appeal my property assessment in Ada County?

Sources and verification