Property taxes in the U.S. have nothing to do with renovations or updates. Property taxes are based on the number of rooms, square footage and lot size. The tax amount is the amount needed for the town / county to pay for services (police, fire, sanitation, public schools, parks, retiree pensions, civil service employees, maintenance on buildings, mandatory programs, etc.
In the New York City suburbs, property taxes are very high because a large portion of the money is used to maintain the high quality of suburban public schools. You need to be aware that most of the suburban public schools in the NYC area are the best in the U.S. School budgets are voted on every year by the local residents and these residents pass their school budgets every year EVEN IF it means an increase in property taxes. So if you intend to buy in Roselle, you need to expect your taxes to increase. On the flip side, if you don't have school age children, there is no point to buying a home in the suburbs of NYC. For what it's worth, I attended a NYC suburban public school and my children attended suburban schools. The educational quality and value is the best. Nobody can top it. What you pay for is all the extras that public schools elsewhere in the U.S. do not have.
If you are moving out of NYC, the schools are a 1,000% advantage.
If property taxes were to be lowered in the suburbs, it would automatically lower the quality of schools and devalue all the homes in the suburbs. So unfortunately, NOBODY will vote to lower taxes. If you can't afford the property taxes, you need to sacrifice like everybody else and buy a coop or condo instead. Sorry but it's a fact of life here.