AppealDesk

Ada County Property Tax Appeal — Idaho

Rob HartleyRob Hartley·Updated February 9, 2026

Ada County is the most populous county in Idaho, anchored by the capital city of Boise and experiencing rapid growth in suburban areas like Meridian, Eagle, and Kuna. As Idaho's economic and government center, the county has seen substantial property value increases, making property tax appeals an important tool for homeowners to ensure fair assessments.

Notable cities: Boise, Meridian, Eagle, Kuna

Median Home

$433,000

Tax Rate

0.58%

Annual Tax

$2,663

Population

approximately 516,000

2026 Appeal Deadline: 4th Monday of June at 5:00 p.m.

Appeals must be filed by the 4th Monday of June at 5:00 p.m. This deadline is strictly enforced and no late appeals are accepted. For 2026, this falls on June 22nd.

Property in Ada County, Idaho — local tax assessment and appeal guide

How Ada County Assesses Property

100%of market value

Assessed by: Ada County Assessor's Office

Assessment cycle: annual

Notices typically mailed: no later than the first Monday of June

In Ada County, properties are assessed at 100% of market value. The assessed value reflects the property's market value as determined by the Assessor through analysis of recent sales, construction costs, and property characteristics.

The Appeal Process

Appeals are heard by the Board of Equalization. The Board of Equalization meets from the 4th Monday in June to the 2nd Monday in July. An appraiser will review your appeal and may contact you to reach an agreement before the hearing.

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Step 1: Contact the Assessor's office at(208) 287-7200 or your appraiser directly to try resolving disputes informally

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Step 2: If unresolved, obtain the Property Assessment Appeal Form from the Assessor's or Commissioner's office

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Step 3: Complete the form with property details and your basis for appeal

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Step 4: Submit the form by the 4th Monday of June deadline via email, mail, in-person, or fax

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Step 5: The Commissioner's office will schedule a hearing date and time

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Step 6: Prepare evidence (comparable sales, photos, repair estimates) and attend your Board of Equalization hearing

Required form: Property Assessment Appeal Form (available online or at Assessor's/Commissioner's offices)

Filing Methods

email:[email protected]
mail:200 West Front Street, 3rd Floor, Boise, Idaho 83702
in-person:200 West Front Street, 3rd Floor, Boise, Idaho 83702
fax:(208) 287-7009 (note: high volume on deadline day may cause delays)

Evidence to Bring

Comparable sales data from similar propertiesWritten analysis from a Realtor or professional appraiserPhotos documenting property conditionRepair estimates for deferred maintenanceAny factual documentation supporting your market value claim

Ada County Assessor Contact

Ada County Assessor's Office

Phone: (208) 287-7200

Address: 190 E Front Street, Suite 107, Boise, ID 83702

Website: https://adacounty.id.gov/assessor/

Online Portal: https://apps.adacounty.id.gov/PropertyLookup/

Hours: 8:00 AM - 5:00 PM, Monday through Friday

Tax Exemptions in Ada County

Homestead Exemption

50% of assessed value up to $125,000 maximum

Reduces the taxable value of owner-occupied primary residences

Eligibility: Must own and occupy home as primary residence, includes up to 1 acre of landDeadline: December 31 (only need to apply once unless ownership changes)

Property Tax Reduction (Circuit Breaker)

Varies based on income

Income-based reduction for qualifying individuals

Eligibility: Age 65+, disabled, widowed, blind, fatherless/motherless children under 18, former POW, veterans with 10%+ disabilityDeadline: April 15 each year

100% Service-Connected Disabled Veteran

Varies based on disability rating

Property tax reduction for qualifying veterans

Eligibility: Veterans with 100% service-connected disability ratingDeadline: April 15 each year

Property Tax Deferral

Defers payment until property is sold or transferred

Allows deferral of property tax payment

Eligibility: Must meet age and income requirementsDeadline: September 3

Official Resources

Ada County Assessor's Office →

Official Ada County Assessor website providing property assessment information, exemptions, and appeals process.

Idaho State Tax Commission Property Tax →

Idaho State Tax Commission's property tax information including laws, forms, and statewide assessment guidelines.

Ada County Property Search →

Online property search portal to look up property records, assessments, and tax information in Ada County.

Ada County Treasurer Property Tax Payments →

Ada County Treasurer's office for property tax payment information, due dates, and payment options.

Ada County Appeal Statistics

Avg Reduction

$700

Check Your Ada County Assessment

Enter your address to see if your Ada County property is overassessed.

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Frequently Asked Questions

What is the deadline to appeal my property taxes in Ada County?
Property tax appeals in Ada County must be filed by the 4th Monday in June at 5:00 p.m. For 2026, this deadline falls on June 22nd. This is a strict deadline - no late appeals are accepted. Assessment notices are mailed no later than the first Monday of June, giving you approximately three weeks to file your appeal.
How do I file a property tax appeal with the Ada County Board of Equalization?
First, try to resolve the issue by calling the Assessor's office at(208) 287-7200. If unresolved, download the appeal form from the county website or pick one up at the Assessor's or Commissioner's office. Submit the completed form via email to [email protected], mail/deliver to 200 W Front St, 3rd Floor, Boise, or fax to(208) 287-7009.
What is the homestead exemption worth in Ada County?
The homestead exemption in Ada County reduces your taxable value by 50% of your home's assessed value, up to a maximum reduction of $125,000. This applies to owner-occupied primary residences and includes up to one acre of land. You only need to apply once, and the exemption remains in effect until ownership changes.
What evidence should I bring to my Board of Equalization hearing in Ada County?
The best evidence includes comparable sales data from similar properties in your area, written analysis from a Realtor or professional appraiser, and photos documenting your property's condition. Remember, you must prove by clear and convincing evidence that the assessed value is not the market value. The assessor's valuation is presumed correct unless you can prove otherwise.
Can I appeal my property tax assessment online in Ada County?
While you cannot submit appeals through an online portal, you can email your completed appeal form to [email protected]. The appeal form can be downloaded from the county website. Make sure to submit before the 4th Monday in June at 5:00 p.m. deadline.
What happens after I file my property tax appeal in Ada County?
After filing, an appraiser will review your appeal and may contact you to try reaching an agreement. If no agreement is reached, the Commissioner's office will schedule a hearing during the Board of Equalization sessions (4th Monday in June through 2nd Monday in July). You'll be notified of your hearing date and time.
Do I qualify for property tax reduction programs in Ada County?
Ada County offers several programs including the Circuit Breaker for those 65+, disabled, or veterans with 10%+ disability. Apply between January 1 and April 15 each year. There's also a deferral program (apply by September 3) and hardship exemptions through Ada County Indigent Services at(208) 287-7960.

For state-wide appeal information including Idaho's assessment ratio and deadlines, see our Idaho Property Tax Appeal Guide →

Considering professional help with your appeal? Compare pricing, coverage, and pros/cons in our Best Property Tax Appeal Services (2026) or browse side-by-side service comparisons →

← All Idaho property tax appeal info

Sources: https://adacounty.id.gov/commissioners/property-assessment-appeals/ | https://adacounty.id.gov/assessor/property-assessments-records/assessment-notices-appeals/ | https://www.ownwell.com/trends/idaho/ada-county | https://adacounty.id.gov/assessor/tax-relief-programs/homeowners-exemption/ | https://adacounty.id.gov/treasurer/calculation-of-property-taxes/

Last verified: 2026-02-09