Mobile County, Alabama Property Tax Appeal Guide for 2027

What deadline matters first

For Mobile County’s 2027 tax year, the safest deadline rule is the notice-date rule. Alabama says property owners have 30 days after receiving a written valuation notice to file a written protest with the County Board of Equalization, and Mobile County says the filing must be received by the Board of Equalization or USPS-postmarked within 30 days of the notice date, not the day you personally read the notice. Alabama Department of Revenue and Mobile County Board of Equalization

As of this analysis on 2026-06-21, Mobile County had not published the exact 2027 filing deadline in the reviewed sources. The county’s posted 2026 deadline was May 19, 2026, so May 19, 2027 is a planning estimate only. Your own notice date and any 2027 county posting should control.

Mobile County’s 2027 assessing time frame is October 1, 2025 through September 30, 2026, with an October 1, 2026 lien/valuation date. The lien/valuation date is the date the county uses as the value point for the tax year. Mobile County Board of Equalization

For tax impact, a rough base-rate example for a Class III residential property outside Mobile and Prichard city limits is about 0.49% of fair market value before exemptions. That comes from 48.5 mills multiplied by Alabama’s 10% Class III residential assessment ratio. Your actual rate can vary by city, school district, classification, and exemptions. Mobile County Revenue Commission

The common value appeal

The official Mobile County value reason is Fair Market Value / Objection to Value. In normal homeowner language, this means you believe the county’s fair market value is higher than what the property would have sold for in an open, arm’s-length market around the relevant valuation date.

The Mobile County Board of Equalization is the county forum for this written objection. The county says an objection to value must have justifiable cause and supporting evidence, and that the property owner or agent must provide supporting data before the Board can adjust value. Mobile County Board of Equalization

A simple example is a house valued by the county at more than similar nearby homes sold for during the assessing time frame. Another example is a home with condition problems that buyers would consider, such as major needed repairs, storm damage, or functional issues, if those facts are supported with documents and photos.

For context, a third-party property-records index describes Mobile County’s property-tax volume as more than 200,000 parcels to manage. That volume does not prove your value is wrong, but it is a useful reminder to make your evidence easy to follow. Property Tax Records

Other reasons you might appeal

Mobile County’s structured value issue for this Board is Fair Market Value / Objection to Value. The county’s published Board materials say the Board reviews Fair Market Value ONLY and does not take appeals for exemptions, tax amount or miscellaneous fees. Mobile County Board of Equalization

That matters because a wrong value and a wrong bill are not the same thing. If the market value is too high, the Board of Equalization is the place to focus your written objection. If your concern is a homestead exemption, tax amount, or added fee, contact the county office responsible for that issue instead.

Do not try to turn a tax-bill complaint into a value filing unless you also have evidence that the fair market value is wrong. The Board can only work with the value issue it is authorized to review.

If your Notice of Assessment says something else changed

A Notice of Assessment is the county notice that tells you the property value or assessment information being used for property tax purposes. In Alabama materials, this may also be described as a written notice of valuation. The date on that notice is important because it starts the 30-day filing period. Alabama Department of Revenue

Read the notice slowly. Circle the value, the notice date, the parcel or account number, the property classification, and any exemption information. Then separate the issues into two groups: fair market value issues and non-value issues.

If the notice shows a higher value and you have market evidence that supports a lower value, that may fit Fair Market Value / Objection to Value. If the notice suggests an exemption, tax amount, or miscellaneous fee problem, Mobile County says the Board of Equalization does not take those appeals. Mobile County Board of Equalization

What evidence helps

Mobile County asks for justifiable cause and supporting data. For a 2027 value objection, focus on market evidence from October 1, 2025 through September 30, 2026, tied to the October 1, 2026 lien/valuation date. Mobile County Board of Equalization

The strongest homeowner evidence is usually comparable sales. These should be arm’s-length sales, meaning a normal willing buyer and willing seller, in the vicinity of your property. Mobile County expressly says foreclosures and short sales cannot be considered.

Good supporting materials may include interior photos, repair estimates, renovation cost summaries, receipts, engineering reports, soil or water testing, land conservation reports, and private appraisals completed within the assessing time frame. For income-producing property, the county also lists income and expense statements, rent rolls, hotel or motel operating statements, and leases as possible support.

Mobile County does not publish a fixed number of comparable sales, a strict mileage cap, or a required square-footage variance in the reviewed policy snapshot. Use similar properties nearby, explain differences clearly, and keep a copy of everything because Mobile County says all evidence must be submitted with the appeal and will not be returned.

What the board can and cannot decide

The Mobile County Board of Equalization is a citizen’s board of review. Mobile County says it relies on input from county and state officials but acts independently when making decisions. Mobile County Board of Equalization

The Board can review the fair market value placed on the property after an appeal has been received from the owner. It may decrease the value, increase the value, or leave the protested value unchanged. The county’s materials say the Board’s decision is effective for one year.

The Board cannot decide every property-tax problem. It does not handle exemptions, tax amount, or miscellaneous fees. It also cannot consider foreclosure or short-sale comparables for the value analysis under the county’s published rules.

That is why your packet should stay focused. Show the county value, show the lower value you believe is supported, and show the evidence that connects your property to that value.

How TaxSauce helps

TaxSauce helps you turn a confusing notice into an organized review. We help identify the county value, the notice deadline, the relevant valuation date, and the evidence that may support Fair Market Value / Objection to Value.

We can help organize comparable sales, condition evidence, photos, repair information, and a plain-English value explanation. We do not promise a reduction or a result. The Mobile County Board of Equalization decides whether the evidence supports a change.

You stay in control. You review the information, decide what to include, and submit the filing to Mobile County by the deadline shown on your notice or county instructions.