Henry County tax assessor: how assessments, appeals, and exemptions work

Last updated 2026-07-09

What does the Henry County tax assessor actually do?

The Henry County Board of Tax Assessors values property. It does not set your tax rate and it does not collect a dime. Those two jobs belong to the Board of Commissioners and the Tax Commissioner. The assessors are a five-member board appointed by the county commissioners, and their office (the Tax Assessors' Office) values all real and personal property in the county for ad valorem tax purposes.

The office uses mass appraisal to estimate fair market value for every parcel, every year. Staff review sales data, building permits, income figures for commercial buildings, and field inspections. The result is your "assessed value," which Georgia law fixes at 40% of estimated fair market value ^[1]. Say your home would sell for $350,000. Your assessed value should read $140,000, and your bill runs against that number, not the full $350,000.

The office sits at 140 Henry Parkway, McDonough, GA 30253. The main line is (770) 288-7999. You can reach it online through the county portal at www.henrycountyga.gov ^[2].

The assessors also handle most exemption applications. That matters if you want a homestead exemption, a senior exemption, or any other reduction Georgia allows. You apply to the assessors, not to the tax commissioner.

How does Henry County calculate my property's assessed value?

Georgia law puts the assessed value at 40% of fair market value for every county. Henry County calls that figure the "assessed value" or "taxable value." Your bill is that value times the millage rate, minus any exemptions.

Here is the whole chain:

Step	What it means	Example
Fair Market Value	What the assessors think your property would sell for	$350,000
Assessed Value (40%)	The taxable base under Georgia law [1]	$140,000
Less Exemptions	Homestead and other approved deductions	$2,000
Net Taxable Value	What the millage rate hits	$138,000
Millage Rate	Set by commissioners, stated per $1,000	e.g., 27.238 mills
Gross Tax	Net taxable value x millage / 1,000	~$3,759

The assessors lean on three approaches. Sales comparison weighs recent sales of similar homes. The cost approach estimates what it would take to rebuild the structure. The income approach applies to properties that earn rent. Your house almost certainly gets valued by sales comparison.

Here is the part that saves people real money. Georgia has a "floating" assessment freeze for homesteaded property under O.C.G.A. § 48-5-2.1, known as the Stephens-Day amendment ^[3]. Once you hold a homestead exemption, the county cannot push your assessed value above last year's figure unless you improved the property, no matter how hot the market runs. In a county growing as fast as Henry, that protection is worth a lot. If your assessment climbed above last year's number and you have homestead with no new construction, you may have a clean appeal.

When does Henry County mail assessment notices and what is the appeal deadline?

Henry County mails its Annual Notice of Assessment in the spring, usually somewhere between March and May, though the exact date shifts year to year ^[2]. The moment that notice lands in your mailbox (or your inbox, if you use the online portal), the clock starts running.

Under O.C.G.A. § 48-5-311, you have 45 days from the date printed on the notice to file a written appeal ^[4]. That is a hard line. Miss it and you are stuck with that value for the year, with no administrative fix. Georgia offers no "I never saw the notice" grace period once the county mails it to your address of record.

Deadline Type	Timeframe	Authority
File appeal with Henry County Board of Assessors	45 days from notice date	O.C.G.A. § 48-5-311 [4]
Request binding arbitration (alternative)	Within the same 45-day window	O.C.G.A. § 48-5-311 [4]
Homestead exemption application	April 1 of the tax year	O.C.G.A. § 48-5-45 [5]
Return of real property (if you dispute the valuation)	April 1	O.C.G.A. § 48-5-18 [10]

Bought mid-year, and the notice already went to the prior owner? You can still appeal within 45 days of the date you were notified of the value. Georgia courts have generally treated a new owner as having standing to appeal a notice issued to the prior owner within the same tax year, but this gets messy. Act fast and call the county office directly if it applies to you.

For comparison, Gwinnett County uses the same 45-day deadline, and so does Coweta County. State statute sets the window, so every Georgia county runs on it.

What exemptions can reduce my Henry County property tax bill?

Georgia stacks several layers of property tax exemptions, and Henry County offers all of them. These are the ones that matter for most homeowners.

Standard Homestead Exemption. Any owner-occupant whose primary home sits in Henry County qualifies for a $2,000 cut in assessed value against state taxes under O.C.G.A. § 48-5-44 ^[5]. Henry County layers its own local homestead exemption on top. You apply once, and it renews automatically as long as you own and live in the property.

Senior Exemptions. Georgia adds exemptions for homeowners 65 and older. The income-based senior exemption under O.C.G.A. § 48-5-47 exempts up to $10,000 of assessed value from county school taxes for those who qualify ^[5]. Henry County has adopted local senior exemptions that reach further. Seniors 62 and older with household income under roughly $30,000 (confirm the current threshold with the county) may qualify for more relief, and seniors 65 and older under certain income limits may qualify for full school tax exemptions at the county level.

Disability Exemption. Totally disabled veterans and certain disabled civilians qualify under O.C.G.A. § 48-5-48 ^[5].

Conservation Use Valuation. Own qualifying farm, forest, or conservation land? You can lock in a lower value under Georgia's Conservation Use Value Assessment program (CUVA) under O.C.G.A. § 48-5-7.4 ^[9]. It is a 10-year covenant, and breaking it triggers back taxes plus interest. On rural Henry County parcels it can slash a bill.

Homestead, senior, and disability applications all go to the Tax Assessors' Office by April 1 of the tax year you want the exemption to hit. Apply in person at 140 Henry Parkway, or online for some exemptions through the county portal ^[2].

How do you appeal a Henry County property tax assessment yourself?

You do not need a lawyer or a contingency firm to appeal. Georgia built this process for homeowners. Here is how it goes, step by step.

Step 1: Pull your notice and check the math. Find the fair market value the assessors assigned. Take 40% of it. Compare that to the assessed value on your notice. If the two do not line up, that alone is a ground for appeal. Then check whether the Stephens-Day freeze applies to you.

Step 2: Research comparable sales. The assessors used recent sales to value your home, so do the same thing. Pull sales from the 12 months before January 1 of the tax year, using the Henry County tax records portal ^[2] or Zillow, Realtor.com, or the Georgia MLS if you have access. Find 3 to 5 homes closest to yours in size, age, condition, and location. If those comps average below the fair market value on your notice, you have evidence.

Step 3: Document condition problems. Deferred maintenance, foundation cracks, water damage, anything the assessors could not see from the street: photograph it and write it down. An independent appraisal (roughly $350 to $600 in the Atlanta metro) is not required, but it is the strongest evidence you can bring.

Step 4: File the appeal in writing. Georgia does not require a specific form for the initial appeal, though Henry County posts a protest form on its site ^[2]. Your appeal has to be in writing, say plainly that you are appealing the assessment, name the parcel, and state the value you think is right. File before the 45-day deadline. Keep a copy and get a dated receipt or confirmation.

Step 5: Pick your appeal path. When you file, you choose one of three routes: (a) the Board of Equalization, a panel of citizen appraisers appointed by the grand jury, (b) binding arbitration, or (c) a hearing officer, available for properties valued over $500,000. Most homeowners go to the Board of Equalization. It costs nothing, it stays informal, and you present your evidence straight to the panel ^[4].

Step 6: Prepare for the hearing. A notice will give you a date and time. Bring your comps printed and organized, your condition photos, and any appraisal. Dress like you are meeting your banker. Be specific. Try something like: "These three sales average $285,000 in fair market value, and they match my home in size and age better than the assessors' comps do." The board wants facts, not venting.

If the Board of Equalization rules against you, you can appeal to Superior Court. That step usually does need an attorney.

Want a template for organizing comps and drafting the appeal letter? The TaxFightBack DIY appeal kit walks through the exact evidence format Henry County (and every Georgia county) expects.

What is the Henry County Board of Equalization and how does it decide appeals?

The Board of Equalization (BOE) is a three-person panel of property owners appointed by the Henry County Grand Jury. They are not county employees, and they have no financial stake in your case. Georgia law requires them to know property values in the county ^[4].

At your hearing, the assessors' office speaks first and defends its valuation. Then you present. The burden of proof sits on you, the appellant, to show the value is wrong. That sounds intimidating. In practice it means one thing: bring better data than they have.

The BOE can lower the value, raise it (rare, but possible), or leave it alone. The decision comes in writing. Under O.C.G.A. § 48-5-311, a reduction by the BOE applies to the current tax year ^[4]. The statute also says that while your appeal is pending, you pay taxes on the lower of the prior year's value or the current assessed value, with a settlement once the appeal ends.

Henry County does not report BOE outcomes in any standardized public format. Statewide data from the Georgia Department of Revenue suggests roughly 40 to 60 percent of residential appeals produce some reduction, depending on the county and the year ^[6]. Nobody has published a clean Henry-County-specific win rate.

How does Henry County compare to other Georgia county assessors?

Every Georgia county runs on the same rules: the 40% assessment ratio, the 45-day appeal window, the same exemption framework. The differences come down to local millage rates, local exemption add-ons, and how hard a given assessors' office pushes values in a given year.

Henry County has been one of the fastest-growing counties in Georgia since 2000. That growth keeps pressure on assessments, especially in McDonough, Stockbridge, and the southern suburbs near I-75. The population climbed from about 119,000 in 2000 to over 260,000 by 2023 ^[7], and home prices tracked right along with it. Fast-growing counties see more assessment fights, simply because values move faster than the mass appraisal cycle can keep up.

For context, Gwinnett County and Cherokee County feel the same growth-driven pressure in the Atlanta suburbs. The Bibb County and Madison County assessors work slower markets where disputes come up less often but follow the identical procedure.

Chatham County (the Savannah area) and Douglas County make useful comparisons for homeowners elsewhere in the state. The Chatham County GA tax assessor sits in Savannah and follows the same 40%/45-day framework. The Douglas County GA tax assessor, based in Douglasville, is another Atlanta-adjacent county with growth dynamics close to Henry's. Same statutory process everywhere, so the appeal steps in this guide travel across county lines.

What personal property does Henry County assess and how does that work?

In Georgia, "personal property" for ad valorem purposes means business personal property: equipment, machinery, inventory, furniture, and fixtures owned by a business. It does not mean your car (vehicles get taxed separately through the Tag Office), and it does not touch your household goods.

Run a business in Henry County? You have to file a Business Personal Property Return with the Tax Assessors' Office by April 1 each year under O.C.G.A. § 48-5-18 ^[10]. The assessors use that return to value your equipment. Skip the filing, and they will estimate your value for you, which usually runs high.

Personal property assessments can be appealed inside the same 45-day window. If you think your equipment got over-valued, document the depreciated value of your assets carefully on the return and keep your supporting records.

Most homeowners never touch this side of the office, unless they run a home business with real equipment.

How do I contact the Henry County Board of Tax Assessors?

Here are the verified contact details for the Henry County Board of Tax Assessors ^[2]:

Contact Method	Details
Physical Address	140 Henry Parkway, McDonough, GA 30253
Phone	(770) 288-7999
Website	www.henrycountyga.gov (search "Tax Assessors")
Office Hours	Monday through Friday, 8:00 AM to 5:00 PM

For a property search, assessment history, or appeal status, the county runs an online parcel search off the assessors' page. Look up your parcel by address or parcel ID.

The Henry County Tax Commissioner handles billing and collection, and that is a separate office. If your question is about paying your bill, payment plans, or tax liens, that office also sits at 140 Henry Parkway and answers at (770) 288-8180.

Mailing a written appeal? Send it certified mail with return receipt to the Tax Assessors' Office address above, and keep the receipt. The postmark does not count as your filing date in Georgia. The appeal has to be received inside the 45-day window.

What are the most common reasons Henry County assessments are wrong?

Assessors work at scale. Henry County has over 100,000 parcels. Mass appraisal will get individual properties wrong. These are the errors worth checking first.

Wrong property characteristics. The records might show the wrong square footage, the wrong bathroom count, or an improvement that never happened. Pull your property record card from the county portal and hold it against reality. A 200 square foot discrepancy can mean thousands in over-assessment.

Ignored condition. The assessors assume average condition unless something tells them otherwise. A cracked foundation, outdated systems, or serious deferred maintenance means the sales comparison approach over-values your home against houses in better shape.

Bad comparable sales. The assessors pick comps by algorithm. Sometimes a "comparable" was a foreclosure, a sale between family members, or a home that is genuinely different in location or quality. You can argue their comps are not comparable and hand them better ones.

A missed Stephens-Day freeze. You have homestead, your assessed value went up, and you made no improvements? That is potentially an error. Line up your prior-year notice against this year's.

New construction timing. Build an addition or finish a basement, and the assessors may add it at full value from the first day of the tax year, even if the work wrapped in mid-summer. Georgia assesses property as of January 1, so only improvements finished by that date belong on the bill.

Any one of these can carry an appeal. Documentation wins them. Pull the property record card first, then build your case around what the records claim versus what is actually true.

Can Henry County raise my assessment after I appeal?

Yes, technically. Under Georgia law, once you file, the Board of Equalization can increase, decrease, or sustain the value ^[4]. In practice, increases at the BOE level are rare for homes, but they happen. The assessors' office can also raise a value during its review before the hearing.

That risk is worth weighing before you appeal a value that already sits near market. If your home shows $340,000 in fair market value and you think it is worth $335,000, the math looks different than if you are at $400,000 and your comps say $310,000.

The rule I use: if your assessed value falls within 5% of what you think market value is, the time and small upward risk may not pay off. If the gap is 10% or more, appeal. The TaxFightBack DIY appeal kit includes a worksheet to run that number before you file.

One more thing. Winning your appeal does not freeze your value forever. The assessors can re-value you higher the next year. The Stephens-Day freeze only kicks in once you hold homestead, and it only blocks increases above the prior year's assessed value when there are no new improvements.

How does the Henry County millage rate affect my actual tax bill?

The millage rate gets set by the taxing bodies (the Henry County Board of Commissioners, the Henry County Board of Education, and any special districts), not by the assessors. The assessors only fix the assessed value. Your bill is:

(Assessed Value minus Exemptions) x Millage Rate / 1,000

As of the most recent published data, Henry County's total millage rate for unincorporated areas has run somewhere between 26 and 30 mills combined (county general fund, school district, and any special districts) ^[8]. Cities inside the county (McDonough, Stockbridge, Hampton, Locust Grove) add a city millage on top.

One mill on a $140,000 assessed value equals $140 a year. So if you cut your assessed value by $20,000 (from $150,000 to $130,000) at 28 mills, you save $560 a year, every year, until the assessors move the number again.

The Georgia Department of Revenue publishes the millage rates reported by all counties each year ^[6]. Check Henry County's current rate there, or in the county's annual tax digest.

Frequently asked questions

What is the deadline to appeal my Henry County property tax assessment?

You have 45 days from the date printed on your Annual Notice of Assessment to file a written appeal with the Henry County Board of Tax Assessors. O.C.G.A. § 48-5-311 sets this deadline, and it applies in every Georgia county. The office has to receive the appeal, more than see it postmarked, before the window closes.

Where is the Henry County Tax Assessors' Office located?

The Henry County Board of Tax Assessors sits at 140 Henry Parkway, McDonough, GA 30253. Office hours run Monday through Friday, 8:00 AM to 5:00 PM. The phone is (770) 288-7999. The Tax Commissioner, which handles billing and collection, is a separate office at the same address, reachable at (770) 288-8180.

How does Georgia's 40% assessment ratio work in Henry County?

Georgia law assesses all taxable property at 40% of fair market value. If Henry County estimates your home's market value at $300,000, your assessed value is $120,000. Your bill runs against the assessed value, not the full market value. This ratio applies in every Georgia county, including Chatham County and Douglas County.

What homestead exemptions are available in Henry County, Georgia?

Georgia's standard homestead exemption cuts assessed value by $2,000 for state taxes. Henry County adds local homestead exemptions on top. Seniors 62 and older with qualifying income can get further reductions on county and school taxes. Applications are due April 1 of the tax year and go to the Tax Assessors' Office. Once approved, the exemption renews automatically each year.

What is the Stephens-Day assessment freeze and does it apply to Henry County?

The Stephens-Day amendment (O.C.G.A. § 48-5-2.1) stops counties from raising the assessed value of a homesteaded property above the prior year's figure unless the owner made improvements. It applies statewide, Henry County included. If your assessment went up year over year and you have homestead with no new improvements, that is a strong basis to appeal.

Can I appeal my Henry County assessment without hiring a lawyer or tax firm?

Yes. Georgia's Board of Equalization process is built for homeowners representing themselves. You file a written appeal, pick the BOE option, and present your evidence at an informal hearing. Bring comparable sales, a property record card showing any data errors, and photos of condition problems. No attorney is required at the BOE level.

How does the Henry County Board of Equalization hearing work?

The Board of Equalization is a three-person panel of citizen property owners appointed by the Henry County Grand Jury. At your hearing, the assessors' office presents its valuation first, then you present your evidence. The panel can lower, raise, or sustain the value. Hearings stay informal, so bring printed comps, your property record card, and any condition documentation.

What happens to my tax bill while my Henry County appeal is pending?

Under Georgia law, while an appeal is pending you pay taxes on the lower of the prior year's assessed value or the current assessed value. Once the appeal resolves, a settlement adjusts the bill up or down. You will not owe the full disputed amount while you wait for the hearing.

How do I look up my Henry County property assessment online?

Go to the Henry County government site at www.henrycountyga.gov and find the Tax Assessors section. The parcel search tool lets you look up any property by address or parcel ID. You can view your fair market value, assessed value, exemptions on file, and the property record card with the square footage and characteristics the assessors used.

Does Henry County assess personal property like vehicles?

Henry County assesses business personal property (equipment, machinery, fixtures) under O.C.G.A. § 48-5-18, with returns due April 1. Vehicles get handled separately by the Tag Office under the Title Ad Valorem Tax system and are not part of the annual property tax bill. Individual household goods are not assessed for ad valorem purposes in Georgia.

How does the Henry County tax assessor differ from the tax commissioner?

The Tax Assessors' Office sets fair market value and assessed value, administers exemptions, and handles appeals. The Tax Commissioner mails tax bills, collects payments, and handles liens and refunds. They are separate offices at the same address. To dispute your value, contact the assessors. To pay a bill or fix a billing error, contact the tax commissioner.

How does Henry County's appeal process compare to Chatham County or Douglas County?

The Chatham County GA tax assessor (Savannah area) and the Douglas County GA tax assessor follow the same state framework: 40% assessment ratio, 45-day appeal deadline, Board of Equalization hearings, and April 1 exemption deadlines. Local millage rates, exemption add-ons, and how hard each office reassesses differ by county, but the appeal steps are identical across Georgia.

What is binding arbitration and when should Henry County homeowners use it?

Binding arbitration is an alternative to the Board of Equalization under O.C.G.A. § 48-5-311. You hire a certified appraiser, the county hires one, and they pick a third if they disagree. The result binds both sides. It runs faster than the BOE for clear appraisal disputes, but you pay your appraiser's fee. It fits high-value properties where the potential savings justify the cost.

Sources

1. Georgia Code O.C.G.A. § 48-5-7, Georgia General Assembly: Georgia law requires all taxable property to be assessed at 40% of fair market value
2. Henry County Board of Tax Assessors, Henry County Government: Henry County Tax Assessors office location (140 Henry Parkway, McDonough), phone (770) 288-7999, and online parcel search
3. Georgia Code O.C.G.A. § 48-5-2.1, Georgia General Assembly (Stephens-Day assessment freeze): Homesteaded properties cannot have assessed value increased above prior year's figure absent new improvements
4. Georgia Code O.C.G.A. § 48-5-311, Georgia General Assembly (property tax appeals): Property owners have 45 days from notice date to file appeal; Board of Equalization procedures; binding arbitration option
5. Georgia Code O.C.G.A. §§ 48-5-44, 48-5-45, 48-5-47, 48-5-48, Georgia General Assembly (exemptions): Standard homestead exemption of $2,000 assessed value; April 1 application deadline; senior and disability exemptions
6. Georgia Department of Revenue, Property Tax Division: Georgia statewide millage rate data and county tax digest statistics; approximately 40-60% of residential appeals result in some reduction statewide
7. U.S. Census Bureau, Henry County, Georgia population estimates: Henry County population grew from approximately 119,000 in 2000 to over 260,000 by 2023
8. Henry County Board of Commissioners, Annual Tax Digest and Millage Rate Notices: Henry County total millage rate for unincorporated areas has ranged approximately 26 to 30 mills in recent years
9. Georgia Code O.C.G.A. § 48-5-7.4, Georgia General Assembly (Conservation Use Valuation): Conservation Use Value Assessment (CUVA) allows qualifying agricultural and forestry land to be assessed at use value under a 10-year covenant
10. Georgia Code O.C.G.A. § 48-5-18, Georgia General Assembly (property returns): Business personal property returns due April 1 annually to county tax assessors