Is my Mountain Park property tax too high?

The median annual property tax bill in Mountain Park is $3,344. Using Gwinnett County's millage rate of 3.506%, the computed tax on the median home ($350,300) is approximately $4,912. If your assessed value is higher than what your home would actually sell for, you are overpaying.

Who do I contact to appeal my Mountain Park property tax?

Appeals are filed with the Gwinnett County Board of Assessors, not at the city level. File a PT-311A form within 45 days of your assessment notice.

How much of my income goes to property taxes in Mountain Park?

At the median, Mountain Park homeowners pay 3.48% of their household income ($96,166/year) in property taxes. That is a significant burden -- a successful appeal directly increases your take-home.

How do Mountain Park property taxes compare to Peachtree Corners?

Peachtree Corners leads Gwinnett County with a median home value of $484,700, compared to Mountain Park's $350,300. But a lower county ranking does not mean your individual home is correctly assessed -- overassessments happen at every price point.

How is my Mountain Park property tax bill calculated?

Georgia taxes property at 40% of fair market value. For Mountain Park's median home ($350,300), the assessed value is $140,120. Multiply by Gwinnett County's millage rate of 3.506% to get your annual bill. Many Mountain Park homeowners find that assessed values have climbed faster than actual sale prices. Comparing your value to 3-5 recent sales of similar homes is the quickest way to spot an overassessment.

Is it worth appealing a small overvaluation in Mountain Park?

Yes. Even a $140 per year overcharge (from a $10,000 overvaluation at Gwinnett County's 3.506% rate) adds up to $420 over three years with the 299c freeze. The appeal is free to file and there is no risk of your assessment increasing.

Can my property tax go up if I appeal?

No. Georgia law (O.C.G.A. § 48-5-311) protects you: the county cannot raise your assessed value above what they originally set just because you filed an appeal. The Board of Equalization only rules on the disputed value. Worst case, your appeal is denied and you keep your current assessment -- your taxes will not increase as a result of appealing.

Mountain Park, GA: Is Your Property Tax Assessment Too High? (2026)

By AppealAlly Team · Published April 1, 2026

The median Mountain Park homeowner pays $3,344/year in property taxes. That is 3.48% of median household income. See how Mountain Park compares and check your savings potential.

Key Takeaways

Appeal deadline: 45 days from your assessment notice date - strictly enforced.Median home value: $350,300 in Mountain Park.Median annual tax bill: $3,344.Tax burden: 3.48% of median household income in Mountain Park.Potential savings: ~$491/year from a 10% reduction, or $1,473 over 3 years with the 299c freeze.Filed with: Gwinnett County Board of Assessors (not the city).No risk: Georgia law guarantees your assessment cannot increase from filing an appeal.

Mountain Park is a small city on the Fulton County border with home values well above the state median, making it especially important for residents to check whether their assessment reflects actual market conditions. Here is how property taxes work in Mountain Park and what to do if your number looks too high.

Mountain Park Appeal Quick Facts

Appeal Deadline: 45 days from the date of the assessment notice
Appeal Form: PT-311A
Filed With: Gwinnett County Board of Assessors
Assessor Phone: 770-822-7212
Median Home Value: $350,300 (-8% below Gwinnett County median)
Estimated Annual Tax Bill: $3,344
Tax Burden: 3.48% of median household income

Is your Mountain Park property tax assessment too high?

The median home in Mountain Park is valued at $350,300, producing an estimated annual tax bill of $4,912 at Gwinnett County's 3.506% combined rate. That means the typical Mountain Park homeowner spends 3.48% of household income on property taxes alone. If Gwinnett County has overestimated your home's fair market value, you are paying more than you should. Georgia law guarantees that filing an appeal cannot increase your assessment, so there is no risk in checking. At $350,300, Mountain Park home values are 8% below the Gwinnett County median, 105% above Georgia's statewide median of $170,200, 10% above the national median of $318,000.

Check If Your Mountain Park Home Is Overassessed

How does Mountain Park compare to other Gwinnett County cities?

Peachtree Corners leads Gwinnett County in home values, but your individual assessment could still be too high regardless of where Mountain Park falls in the county ranking.

What evidence matters for Mountain Park appeals?

In a mid-size city like Mountain Park, you should be able to find 3-5 comparable sales within Gwinnett County. Look for homes that sold in the last 12 months with similar square footage, age, and condition. If local sales are limited, expand your search to neighboring areas within the county. For the full evidence strategy, exemption details, and step-by-step filing instructions, see our Gwinnett County Property Tax Guide.

How much can you save in Mountain Park?

Based on a combined tax rate of 3.506%. Your actual rate may vary by tax district.

A 10% reduction on the median Mountain Park home ($350,300 down by $35,030) would save approximately $491 per year, or $1,473 over three years with the 299c value freeze.

At 3.48% of household income, even a modest reduction in your assessed value makes a real difference in your annual budget.

File your appeal through Gwinnett County

Property tax appeals in Mountain Park are filed with the Gwinnett County Board of Assessors. You have 45 days from the date of your assessment notice to submit a PT-311A form.

Gwinnett County Board of Assessors: 75 Langley Drive, Lawrenceville, GA 30045 | 770-822-7212 For the full appeal process and deadline details, see our Gwinnett County Property Tax Guide.

Other Cities in Gwinnett County

Explore Gwinnett County

Based on 2024 American Community Survey estimates and Gwinnett County millage rates.

Frequently Asked Questions

Is my Mountain Park property tax too high?: The median annual property tax bill in Mountain Park is $3,344. Using Gwinnett County's millage rate of 3.506%, the computed tax on the median home ($350,300) is approximately $4,912. If your assessed value is higher than what your home would actually sell for, you are overpaying.
Who do I contact to appeal my Mountain Park property tax?: Appeals are filed with the Gwinnett County Board of Assessors, not at the city level. File a PT-311A form within 45 days of your assessment notice.
How much of my income goes to property taxes in Mountain Park?: At the median, Mountain Park homeowners pay 3.48% of their household income ($96,166/year) in property taxes. That is a significant burden -- a successful appeal directly increases your take-home.
How do Mountain Park property taxes compare to Peachtree Corners?: Peachtree Corners leads Gwinnett County with a median home value of $484,700, compared to Mountain Park's $350,300. But a lower county ranking does not mean your individual home is correctly assessed -- overassessments happen at every price point.
How is my Mountain Park property tax bill calculated?: Georgia taxes property at 40% of fair market value. For Mountain Park's median home ($350,300), the assessed value is $140,120. Multiply by Gwinnett County's millage rate of 3.506% to get your annual bill. Many Mountain Park homeowners find that assessed values have climbed faster than actual sale prices. Comparing your value to 3-5 recent sales of similar homes is the quickest way to spot an overassessment.
Is it worth appealing a small overvaluation in Mountain Park?: Yes. Even a $140 per year overcharge (from a $10,000 overvaluation at Gwinnett County's 3.506% rate) adds up to $420 over three years with the 299c freeze. The appeal is free to file and there is no risk of your assessment increasing.
Can my property tax go up if I appeal?: No. Georgia law (O.C.G.A. § 48-5-311) protects you: the county cannot raise your assessed value above what they originally set just because you filed an appeal. The Board of Equalization only rules on the disputed value. Worst case, your appeal is denied and you keep your current assessment -- your taxes will not increase as a result of appealing.