On a New Jersey page I won't pretend the taxes are a selling point. They're not. So let's be precise about what you're signing up for.
Somerville's effective property-tax rate is about 2.581% of market value, per the New Jersey Treasury's 2025 county tax tables. Staten Island's effective rate sits near 0.85%. That's roughly a three-times difference on the same dollar of home value.
In real numbers, a $500,000 Somerville home carries roughly $12,000–$13,000 a year in property tax. A $600,000 home runs closer to $15,000. The comparable Staten Island bill on that same house would be in the $4,000–$5,000 range. The town's median annual tax bill lands around $10,000.
So what does the money buy, since it clearly isn't a lower bill? It buys a walkable downtown, a train and a bus at your door, a full hospital in the borough, and a Main Street that most New Jersey suburbs would trade a lot for. That's the honest exchange... you're paying for lifestyle and location, not for a tax advantage.
The planning piece: the tax jump is exactly the kind of thing we run the math on before you fall for a listing. Your Staten Island sale proceeds, the new carrying cost, and the monthly reality all have to line up before you write an offer. That's a conversation I'd rather have early than late.