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2024 mil rate · Knox County, ME
Union property tax rate
Union's 2024 mil rate is $17.20 per $1,000 of assessed value. A property assessed at $300,000 owes $5,160.00 for the year. That ranks 155th highest of Maine's 482 municipalities, above the middle, $2.64 per $1,000 above the $14.56 per $1,000 state median.
- 1Mil rate $17.20 per $1,000
- 2Bill on $300,000 assessed $5,160.00
Your Union tax bill
The bill before exemptions and credits. Compare every Maine rate.
Union's rate, ratio and tax base
Maine Revenue Services certified Union's 2024 ratio at 100%: its assessments average 100% of market value, exactly at market. Multiplying the rate by the ratio gives $17.20 per $1,000 of market value at that average level. The state median ratio is 100%, and 234 municipalities are certified at 100%.
The rate comes from the town's own numbers: Union committed $6,246,514 of property tax on $363,169,395 of taxable valuation, and $17.20 per $1,000 on that valuation raises $6,246,514. That commitment ranks 128th of 482 in Maine and is 4.24% of all the property tax committed in Knox County's 18 municipalities; the valuation ranks 156th.
Tax on common assessed values in Union
| Assessed value | 2024 bill | Versus ME median rate |
|---|---|---|
| $200,000 | $3,440.00 | +$528.00 |
| $300,000 | $5,160.00 | +$792.00 |
| $400,000 | $6,880.00 | +$1,056.00 |
| $500,000 | $8,600.00 | +$1,320.00 |
| $750,000 | $12,900.00 | +$1,980.00 |
Each bill is the assessed value divided by 1,000 and multiplied by $17.20, before exemptions, credits such as Maine's homestead exemption or special charges. These are assessed values, not sale prices: at a 100% ratio the $300,000 row is a property worth about $300,000. The last column is the difference from the same assessment at the $14.56 per $1,000 state median.
How Union compares in Knox County and Maine
Among the 18 municipalities in Knox County, Union ranks 5th highest; the county median is $13.45 per $1,000, so Union sits $3.75 per $1,000 above it. The next higher rate in the county is Hope at $19.30, and the next lower is Owls Head at $15.50. Statewide, 67% of municipalities have a lower mil rate than Union.
Outside Knox County, the closest rates are Raymond ($17.20, Cumberland), Solon ($17.20, Somerset), Sweden ($17.20, Oxford), Livermore ($17.10, Androscoggin). Because towns assess at different shares of market value, the rate multiplied by the certified ratio is the better guide to what a house of a given price pays.
Appealing a Union assessment
In Maine an abatement starts with a written request to Union's assessors within 185 days of the tax being committed. The assessors have 60 days to decide; then the appeal goes within 60 days to the Board of Assessment Review, or to the Knox County commissioners where the municipality has no board, and on to the Superior Court within 30 days (Maine Revenue Services, Property Tax Bulletin No. 10 (revised March 26, 2020)). Overvaluation is judged against how the town assesses similar property on average, which is where Union's 100% certified ratio comes in: a $300,000 assessment at that ratio corresponds to about $300,000 of market value.
The Maine appeal page sets out each step with its source and the ratio arithmetic. This is a summary of the published procedure, not legal advice.
Union property tax questions
What is the property tax rate in Union, ME?
Union's 2024 mil rate is $17.20 per $1,000 of assessed value. Source: Maine Revenue Services.
How much is the property tax on a $300,000 assessment in Union?
$300,000 ÷ 1,000 × $17.20 = $5,160.00 a year, before exemptions and credits.
Is Union's tax rate high for Maine?
It ranks 155th highest of 482, above the middle of Maine municipalities; the median is $14.56 per $1,000. Its certified ratio is 100%, so its assessments sit at market value on average.
How do I appeal a Union property assessment?
Written abatement request to the assessors: 185 days after commitment (36 M.R.S. §§ 841–849 (Bulletin 10)). Then: assessors' decision (60 days); appeal to the board of assessment review or county commissioners (60 days); appeal to the superior court (30 days).
Source: Maine Revenue Services, 2024 Municipal Valuation Return Statistical Summary, Section 1 (certified ratio, commitment, tax rate, total taxable valuation), dated November 19, 2025. Appeal steps: Maine Revenue Services, Property Tax Bulletin No. 10 (revised March 26, 2020). Last checked October 21, 2026. This page explains published figures; it is not tax or legal advice.