You’ll need to find out what home the tax assessor has used for his estimate of your home’s value. This is necessary in order to counter his argument for imposing his valuation by point out areas that are not similar and introducing more similar comparables that you have chosen.
Sometimes the tax assessor might not give you the information you have requested. If so, make or fax a written appeal to the appraisal district and get that information by way of the Freedom of Information Act. Appealing your taxes is adversarial and you need to know what information the other side is using.
Take photographs to back up your property value contentions. As the adage says, a photo is worth a thousand words, use them to your advantage. Offer examples you found that are more similar. Adjust for dollar differences for location, square footage, quality, age and condition, etc. of the home to nail down an exact value.
When choosing your comparables, look for ones that are similar, most importantly, in location. It should be in a similar neighborhood as yours. This location factor is vital and one of the main reasons that your comparable or the assessors comparable is or is not appropriate.
Focus on other similar features such as number of bedrooms, baths, quality and style of home, number of garages and make adjustments accordingly. The tax assessor will likely cherry pick the more expensive homes and they may have dissimilar features that you’ll need to address in your analysis.
There will be differences in square footage, number of garages, with or without decks, patios, swimming pools, etc. and you need to make dollar adjustment to equalize features that are not similar to your home. These are simple plus or minus adjustments.
When you have all this information assembled, first speak to your tax assessor and ask for a reduction based on your findings. Likely, they will not go along with your conclusion since they perceive their job as to preserve the aggregate tax base. They are there to make sure that there is money for the town government to spend. If you don’t get satisfaction, appeal to the municipal level.
Even with tax cuts, towns are still asking for tax hikes and are forcing many who are on the edge into foreclosure. If you can find sales of homes for the tax year you are appealing whose market value is less than your home, you’ll have savings for many years in the future. Seems like few people want to go through the work it takes to appeal their property taxes. When one looks at the money they will save over the period of time before the next blanket reassessment (which may be 10 or more years in the future), appealing an unjust property tax makes more than enough sense.