What Is Historic Preservation Exemption
A historic preservation exemption is a property tax reduction granted to owners who maintain designated historic structures. Unlike a blanket tax exemption, this exemption typically applies only to the value added through qualified restoration work, not the entire property. Many states cap the exemption at 10 to 25 years, after which the property returns to standard assessment.
The exemption works by freezing the assessed value of the property at the pre-restoration level for a set period. If your historic home was assessed at $250,000 before you completed a $80,000 restoration, the exemption keeps the taxable value at $250,000 instead of jumping to $330,000. The exemption only applies to improvements that meet state historic preservation standards, not routine maintenance or non-historic upgrades.
Eligibility Requirements
To qualify, your property must be listed on the National Register of Historic Places or designated as historic under your state or local preservation ordinance. Some jurisdictions require properties to be at least 50 years old; others use 75 years as the threshold. You'll need formal certification from your state historic preservation office (SHPO) or local historic district commission confirming that completed work meets preservation standards.
Work must follow the Secretary of the Interior's Standards for Historic Preservation. This means using period-appropriate materials, respecting original architectural details, and obtaining pre-approval before starting major projects. Replacing original windows with vinyl or removing historic siding typically disqualifies the improvement from exemption coverage.
Application and Board of Review Hearings
You submit your exemption application to the assessor's office along with SHPO certification and detailed invoices showing the cost of qualified improvements. The assessor will use the cost approach to value the restoration work, comparing it to your property's pre-improvement assessment ratio. Assessment ratios vary by county, ranging from 50% to 100% of market value depending on local practice.
If the assessor denies your application or reduces the exemption amount, you can appeal to the board of review within the statutory deadline, typically 30 to 45 days. Present comparable sales data showing how recently restored historic properties in your area sold. If a similar historic home sold for $350,000 after a $90,000 restoration, that comparable establishes the market value of your improvements more persuasively than invoices alone.
During your board of review hearing, bring original receipts, contractor estimates, and photographs documenting the work completed. The assessor uses the appraisal method (income, cost, or sales comparison) to set fair market value; you can challenge their methodology if they relied solely on cost without adjusting for local market conditions.
Duration and Recertification
Most states grant the exemption for 10 to 15 years from certification, though some extend to 25 years for substantial restoration projects. You must recertify at the end of the exemption period if you want continued protection. Failure to maintain the property in historic condition may result in exemption revocation, and the assessor can reassess the property at current market value retroactively in some jurisdictions.
Common Questions
- Can I claim a historic preservation exemption and an abatement simultaneously? No. Most states treat exemptions and abatements as mutually exclusive remedies. You must choose one approach. An abatement may be better if the exemption covers only partial improvements, while an exemption is preferable for long-term protection of large restoration projects.
- What if the assessor's valuation of my improvements differs from my contractor's invoices? The assessor may apply a depreciation factor or adjust for regional cost differences. Request a detailed appraisal report showing their methodology. If they used the cost approach without comparable sales data, bring recent sales of restored historic properties in your area to demonstrate market value of similar work.
- Does the exemption reduce my property tax bill immediately? Exemptions typically take effect the tax year after certification is granted. You receive the benefit on the next assessment cycle, not retroactively. File early in the assessment year to avoid missing the filing deadline.