I am a local Realtor in the Patchogue area. I also own and operate a tax grievance service. We are a flat rate company which makes us cheaper than most companies. I only grieve Brookhaven town. It depends on the circumstances of your purchase. Was it a regular transaction, a short sale, a foreclosure? Feel free to contact me at 631-838-0715
Please speak with an expert at it...you can call or email me for the name/number of my referral. firstname.lastname@example.org 631-425-6150
Ask a Realtor in your area to email you a Comparative Market Analysis (CMA). This will show you the market value of your property based on comps sold in the neighborhood. If that value comes in lower than the $220K, then you can appeal the Assessor's value and you will have the comps to send the Assessor as 'proof'. Of course, if the opposite is true (the market value is higher than the Assessor's $220K), you shoudl accept the Assessor's value of $220K.