AppealDesk

Kauai County Property Tax Appeal — Hawaii

Rob HartleyRob Hartley·Updated March 5, 2026

Kauai County is Hawaii's fourth-largest island by area and is nicknamed the 'Garden Isle' for its lush tropical rainforests and dramatic natural beauty. With a population of approximately 73,000 residents, Kauai County has a median home value of approximately $987,500 to $1.4 million as of early 2026, significantly higher than the national median. The county's effective property tax rate of approximately 0.28% is among the lowest in the nation, well below the national average of 1.02%. Despite the low tax rate, property tax appeals matter here because even small assessment errors on high-value properties can result in thousands of dollars in overpayments, and Hawaii's assessment system uses 100% of market value, making accurate valuations critical for homeowners in this expensive real estate market.

Notable cities: Lihue, Kapaa, Princeville, Poipu, Hanapepe

Median Home

$987,500

Tax Rate

0.28%

Annual Tax

$3,122

Population

73,298

2026 Appeal Deadline: December 31, 2025 (for 2026 tax year)

The appeal deadline for the 2026 real property assessment was December 31, 2025. For future years, appeals must be filed by December 31st of the year preceding the tax year. If you receive a corrected assessment notice, you have 30 days from the date of that notice to file an appeal. If mailed, appeals must be postmarked on or before the deadline. If delivered in person, they must be received by 4:30 PM on the deadline date.

Property in Kauai County, Hawaii — local tax assessment and appeal guide

How Kauai County Assesses Property

100%of market value

Assessed by: Kauai County Real Property Assessment Office

Assessment cycle: annual

Notices typically mailed: mid-April (by April 15)

Kauai County assesses properties at 100% of fair market value, meaning the assessed value equals the full market value with no assessment ratio reduction. For example, if your home's market value is $987,500 (the county's median), at Kauai's 100% assessment ratio your assessed value would be $987,500. After subtracting the basic home exemption of $220,000, your net taxable value would be $767,500, resulting in approximately $1,988 in annual taxes at the owner-occupied rate of $2.59 per $1,000 of assessed value.

The Appeal Process

Appeals are heard by the Board of Review. The Board of Review hearing is an informal proceeding where you present your evidence to a five-member board composed of property owners. You will state your case, the county appraiser will explain how the assessment was determined, and the Board will issue a verbal decision immediately after hearing both sides.

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Step 1: Review your assessment notice carefully when it arrives in mid-April, noting the assessed value, property classification, and any exemptions. Compare the assessed value to recent comparable sales in your neighborhood and ensure your property characteristics are accurate.

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Step 2: If you believe your assessment is incorrect, contact the Real Property Assessment Office at (808) 241-4224 to discuss your concerns. Many issues can be resolved through informal discussion with county appraisers before filing a formal appeal, potentially avoiding the appeal process entirely.

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Step 3: If informal resolution is unsuccessful, complete Form P-51 (Taxpayer's Notice of Real Property Tax Appeal) by the December 31st deadline. You must identify specific grounds for appeal, such as assessment exceeding market value by more than 15%, lack of uniformity, incorrect classification, denial of exemption, or illegal assessment methods.

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Step 4: Gather supporting evidence including recent comparable property sales, photographs of your property showing condition or defects, repair estimates for any damage, independent appraisals, and documentation of property characteristics. Submit your appeal with a $75 non-refundable filing fee (payable to Director of Finance) via online portal at connect.kauai.gov, mail, or in-person delivery.

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Step 5: After filing, the Board of Review will schedule a hearing and notify you by mail of the date. At the hearing, you will present your evidence and the county appraiser will explain their valuation. The Board will issue a verbal decision immediately after the hearing, followed by a written decision mailed within a few weeks.

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Step 6: If you disagree with the Board of Review's decision, you have 30 days from the date of the written decision to file an appeal with the Hawaii Tax Appeal Court. This is a formal legal proceeding where you may want to consider hiring legal counsel.

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Step 7: Alternatively, you can appeal directly to the Tax Appeal Court without going through the Board of Review first, though this option typically requires legal representation and follows formal court procedures.

Required form: Form P-51 (Taxpayer's Notice of Real Property Tax Appeal)

Filing Methods

online:https://connect.kauai.gov - New online portal launched December 2025 for filing appeals and paying fees
mail:Mail to: Kauai County Real Property Assessment Office, 4444 Rice Street, Suite 454, Lihue, HI 96766
in-person:Deliver to: 4444 Rice Street, Suite 454, Lihue, HI 96766 (must be received by 4:30 PM on deadline)

Evidence to Bring

Comparable property sales from the same neighborhood with similar characteristicsPhotographs showing property condition, defects, or damageRepair estimates or contractor bids for needed workIndependent appraisal reportsDocumentation of property characteristics and any errors in county records

Kauai County Assessor Contact

Kauai County Real Property Assessment Office

Phone: (808) 241-4224

Address: 4444 Rice Street, Suite 454, Lihue, HI 96766

Website: https://www.kauai.gov/Government/Departments-Agencies/Finance/Real-Property-Tax/Assessment

Online Portal: https://connect.kauai.gov

Tax Exemptions in Kauai County

Basic Home Exemption

$220,000

Reduces the taxable assessed value of owner-occupied homes and qualifies property for the lower Homestead tax classification rate

Eligibility: Must occupy property as principal residence for more than 270 days per year, own the property, file Hawaii state income tax return as resident, have Hawaii driver's license or state ID, and not claim primary residency elsewhereDeadline: September 30 (annually for first-time applicants; once granted, no annual reapplication required unless status changes)

Additional Age Exemption

$240,000 for ages 60-69; $260,000 for ages 70+

Provides additional exemption for senior homeowners on top of the basic home exemption

Eligibility: Must qualify for basic home exemption and meet age requirementsDeadline: September 30

Additional Income-Based Exemption

$120,000

Provides further exemption reduction for low and moderate-income homeowners who already have the basic home exemption

Eligibility: Gross income of all owner-occupants cannot exceed 80% of Kauai median household income (limit was $104,200 for 2025 applications). Must already have basic home exemption.Deadline: September 30 (must apply annually)

Totally Disabled Veteran Exemption

Full exemption up to $50,000 taxable value (minimum tax of $100 applies)

Exempts home from all property taxes except minimum tax for veterans totally disabled due to injuries received on active duty

Eligibility: Must be totally disabled veteran due to injuries on active duty with U.S. Armed Forces, or unmarried widow/widower of totally disabled veteranDeadline: September 30

Disability Exemption (Sight, Hearing, or Total Disability)

$50,000

Provides exemption for persons with impaired sight or hearing, or who are totally disabled

Eligibility: Must have impaired sight, hearing, or total disability certified by licensed physician or commissioned medical officer. This is in addition to regular home exemption.Deadline: September 30

Official Resources

Kauai County Real Property Assessment Office →

Official county assessor website with assessment information, forms, and property records

Kauai County Online Appeal Portal →

New online system for filing property tax appeals and paying fees electronically

Kauai Property Tax Search and Records →

Search property records, view assessment cards, and access ownership and tax information

Hawaii Tax Appeal Court Information →

State judiciary website with information about appealing to the Tax Appeal Court

Check Your Kauai County Assessment

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

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Frequently Asked Questions

What is the deadline to appeal my property taxes in Kauai County for the 2027 tax year?
The deadline to file a property tax appeal in Kauai County is December 31st of the year preceding the tax year you're appealing. For the 2027 tax year (July 1, 2026 - June 30, 2027), the appeal deadline would be December 31, 2026. If you mail your appeal, it must be postmarked by the deadline date. If you deliver it in person to the Real Property Assessment Office at 4444 Rice Street in Lihue, it must be received by 4:30 PM on December 31st. Missing this deadline means you forfeit your right to appeal that year's assessment administratively, though you may have 30 days to appeal if you receive a corrected assessment notice.
How do I file a property tax appeal in Kauai County online?
Kauai County launched a new online appeal system in December 2025 that allows property owners to file appeals and pay fees electronically at connect.kauai.gov. The system was developed in partnership with ElementsXS/LIMS and streamlines the entire appeal process. You'll need to create an account, complete the online version of Form P-51 (Taxpayer's Notice of Real Property Tax Appeal), upload supporting documentation, and pay the $75 filing fee online. You can still file by mail or in person if you prefer, but the online portal offers the convenience of filing 24/7 and provides instant confirmation of your submission with electronic payment processing.
What is the home exemption worth in Kauai County and how much can it save me?
Kauai County offers a basic home exemption of $220,000 that reduces your property's taxable assessed value, plus it qualifies you for the lower owner-occupied residential tax rate of $2.59 per $1,000 instead of the higher non-owner rates. For a home with a market value of $987,500 (the county median), this exemption would reduce your taxable value to $767,500, saving you approximately $570 per year in taxes. If you're 60-69 years old, you can get an additional $240,000 exemption (total $460,000), and if you're 70 or older, you get $260,000 additional (total $480,000). Low to moderate-income homeowners may qualify for an additional $120,000 exemption if their household income is below 80% of the county median.
What grounds can I use to appeal my Kauai County property tax assessment?
Kauai County Code Section 5A-12.1 specifies five legal grounds for filing a property tax appeal. First, you can appeal if the assessed value exceeds market value by more than 15%. Second, you can appeal for lack of uniformity or inequality caused by illegal assessment methods or errors in applying valuation methods. Third, you can appeal if you were denied an exemption or dedication to which you're entitled and qualified. Fourth, you can challenge illegal or unconstitutional methods used to determine the assessment. Finally, you can appeal if your property's tax classification is incorrect according to county code. You must check at least one of these grounds on Form P-51 when filing your appeal, and you should provide specific evidence supporting your claim.
What happens at a Board of Review hearing in Kauai County?
The Board of Review hearing is an informal proceeding where a five-member board of property owners hears your appeal case. You'll receive advance notification of your hearing date by mail. At the hearing, you present your case first, explaining why you believe your assessment is incorrect and showing your supporting evidence such as comparable sales, photos, or appraisals. Then the county appraiser explains how they determined your property's assessed value using mass appraisal methods. The Board may ask questions of both parties. After hearing both sides, the Board issues a verbal decision immediately. You'll then receive a written decision by certified mail within a few weeks. If you win or reach a compromise, your $75 deposit is refunded; if you lose, the county retains the deposit.
How much can I save by appealing my property taxes in Kauai County?
The potential savings from a successful property tax appeal in Kauai County depends on how much you can reduce your assessed value. With the owner-occupied tax rate of $2.59 per $1,000 of assessed value, every $100,000 reduction in your assessed value saves you $259 per year in property taxes. For example, if you successfully argue your home valued at $1.2 million should be $1.0 million, that $200,000 reduction would save you $518 annually. In Hawaii generally, many homeowners have successfully reduced assessments by 10-20%. On a $1 million assessed home, a 15% reduction ($150,000) would save approximately $388 per year. Given Kauai's high property values, even a modest percentage reduction can result in significant ongoing savings, especially considering these savings continue every year unless reassessed higher.
What evidence do I need for a successful Kauai County property tax appeal?
To win your property tax appeal before the Kauai County Board of Review, you need strong evidence proving your assessment is incorrect. The most persuasive evidence is recent comparable sales of similar properties in your neighborhood—properties with similar square footage, lot size, age, condition, and features that sold for less than your assessed value. You should also provide photographs documenting your property's actual condition, especially any defects, damage, deferred maintenance, or inferior features not reflected in county records. Repair estimates from licensed contractors can support claims of needed work. An independent appraisal from a licensed appraiser carries significant weight. Also review your property record card from the county to identify any factual errors about square footage, number of bedrooms, construction quality, or other characteristics. The burden of proof is on you to show the county's assessment is wrong, so comprehensive documentation is critical.
Can I appeal directly to Hawaii Tax Appeal Court without going through the Board of Review in Kauai County?
Yes, Hawaii law allows taxpayers to appeal real property tax assessments directly to the Tax Appeal Court without first appearing before the county Board of Review. However, this option is typically more formal, complex, and expensive than the Board of Review process, and you will likely need to hire an attorney. The Tax Appeal Court is a state court of record that decides all questions of fact and law, including constitutional issues. If you first appeal to the Board of Review and disagree with their decision, you have 30 days from the date of their written decision to file an appeal with the Tax Appeal Court. Most homeowners find the Board of Review process more accessible and less costly, as it doesn't require legal representation and uses an informal hearing format. The Board of Review also offers a small claims procedure for disputes under certain dollar amounts.

For state-wide appeal information including Hawaii's assessment ratio and deadlines, see our Hawaii 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 →

More Hawaii Counties

Hawaii County (Hilo)Honolulu County (Honolulu)Maui County (Wailuku)
← All Hawaii property tax appeal info

Sources: https://www.kauai.gov/Government/Departments-Agencies/Finance/Real-Property-Tax/Assessment | https://www.kauai.gov/files/assets/public/v/1/finance/rpa/2026-tax-reliefexemption-forms/tax_appeal_form_p-51_rev_8.11.2025-fillable.pdf | https://connect.kauai.gov | https://kauainownews.com/2025/12/24/time-running-out-for-property-owners-to-file-appeal-of-their-2026-real-property-assessment/ | https://www.ownwell.com/trends/hawaii/kauai-county | https://ptaconsumers.aarpfoundation.org/taxpayer-states/hawaii/ | https://www.courts.state.hi.us/courts/landtax/land_and_tax_appeal_courts

Last verified: 2026-03-05