Newton, NJ Real Estate: What the Numbers Actually Say by Buyer, Seller, and Investor

What Newton homes are worth, reconciled

Four legitimate sources produce four different numbers for “the price of a home in Newton” inside the same rough window, and none of them is wrong on its own terms: they measure different things.

Two things follow. First, the Census figure and the Zillow figure both describe Newton specifically and disagree by roughly $90,000 because one averages the town’s entire housing stock and the other tracks current transactions, which run newer and pricier. Second, even the two county-level figures, two months apart, disagree by $57,000, which says more about how fast Sussex County was moving in early 2026 than about any single number being unreliable. Use the Census figure to judge what a typical long-owned Newton house is worth on paper, and the Zillow figure to judge what a home changing hands today is likely to cost.

Why do different sites list different median prices for Newton? Because “median price” can mean the value of every owner-occupied home in town (Census), the current modeled value of the whole housing stock (Zillow), or the price of homes that actually sold in a given month (county sale-price reports). All three are legitimate; none of them is “the” Newton price on its own.

Why “Newton by zip code” doesn’t exist yet

One portal lists five zip codes as “popular in Newton”: 07860, 07848, 07821, 07871, and 07826. Only 07860 is Newton’s own zip code; the other four belong to Lafayette Township, Branchville, Sparta, and Franklin. No independently verifiable, Newton-only per-zip price breakdown currently exists in public data, so this page doesn’t manufacture one.

Why can’t I find a reliable price breakdown by Newton zip code? Newton is small enough, at 3.36 square miles, to sit almost entirely inside a single zip code (07860). The “Newton zip code” lists circulating online mostly describe neighboring towns, not Newton sub-markets.

What it costs to own here

Sussex County’s tax reality

None of the major listing portals mention property tax in their Newton affordability math, which is a significant omission in a state with the highest average effective property tax rate in the country. Newton’s 2025 general tax rate is $2.662 per $100 of assessed value, set by the town’s Tax Collector. On a home assessed near the Census median value of $302,700, that works out to roughly $8,058 a year; on a home assessed near Zillow’s current typical value of $393,313, roughly $10,468 a year. Actual assessed value can differ from market value, so treat these as estimates, not bills.

The mortgage math alone understates the jump between tiers: moving from the Census-median home to a $550,000 home nearly doubles the all-in monthly cost once tax is included, not because the loan payment doubles but because the tax bill scales with it dollar for dollar.

How much are property taxes on a typical Newton home? Around $8,000 to $10,500 a year on a home in the $300,000 to $393,000 range, using the 2025 municipal rate of $2.662 per $100 of assessed value.

How Newton compares with nearby Sussex County towns

A second, independently dated source on the priciest town in this table: Rocket Homes counted 108 homes for sale in Sparta Township as of May 2025, with a $600,000 median list price, up 10.2% year over year, corroborating the Zillow figure’s general range even though the two don’t match exactly. Lake access, not scenery in the abstract, explains most of the spread in this table: the two priciest towns are lake towns, and the least expensive is the old mining town furthest from either lake.

For buyers: what to check before you offer

• Confirm assessed value with the Tax Collector before assuming a specific listing matches the ownership-cost table above. Assessments lag sales, sometimes by years, so the actual bill can run above or below the price-based estimate.
• Ask whether the listing sits inside the 07860 zip specifically or a rural mailing address bordering Newton, given the zip-code mislabeling covered above.
• Weigh the town-wide education figures against the specific school’s rating. Newton reports 92.7% high-school-graduate-or-higher and 30.5% bachelor’s-degree-or-higher among adults 25+, but Newton High School’s own GreatSchools rating runs below the state average (see the schools note under For agents).
• Budget for the property-tax gap, not just the mortgage payment, since it’s the larger swing between price tiers in Sussex County.

For sellers: what current pace means for pricing

Sussex County’s days on market improved from 53 to 47 days between the two most recent NJ Realtors readings through March 2026, with 102.0% of list price received on average and months of supply tightening to 2.0: county-wide figures, since no Newton-only pace figure is independently verifiable. A market moving in 47 days with sellers netting slightly above list is not a market that rewards overpricing and waiting it out. It rewards pricing at or slightly under the reconciled range in the first table and letting competitive interest push the number up, over starting high and chasing the market down through multiple cuts.

Is now a good time to sell in Newton? County-wide indicators through March 2026 point toward a seller-favorable but not runaway market: under two months of supply, prices received close to or above list, and days on market trending down.

For investors: rental and hold considerations

• Register before you rent. New Jersey’s Landlord Identity Law requires registration for multi-unit rentals; unregistered landlords cannot obtain a court judgment of possession, which blocks eviction even for nonpayment.
• Cap the security deposit at 1.5 months’ rent and hold it in an interest-bearing account, per the state’s security deposit law, with written notice to the tenant of where it’s held.
• Disclose flood risk in writing. Every New Jersey landlord has been required to provide a flood-risk notice to prospective tenants since March 20, 2024, regardless of whether the property sits in a mapped flood zone.
• Model rent against the town’s own income figures, not the metro figure. A $76,221 median household income supports different rent ceilings than a $99,155 one; using the wrong number overstates achievable rent by roughly a quarter.

What should an investor check before buying to rent in Newton? Landlord registration status with the municipal clerk, the security-deposit interest-account requirement, and the mandatory flood-risk disclosure, on top of the usual rent-versus-carrying-cost math from the ownership table above.

For agents: sourcing defensible comps here

When a client asks why a national portal’s Newton number doesn’t match the comp sheet, the answer is rarely that either source is wrong: it’s the list-versus-sold, stock-versus-turnover distinction covered above. Pulling a comp set that mixes Census-style “all owner-occupied homes” language with a live MLS pull, without naming which is which, is the fastest way to lose a client’s trust when they cross-check the number themselves. On schools, Newton High School carries a GreatSchools rating of 4 out of 10, described as performing below average against comparable New Jersey schools, alongside a #2-of-9 county ranking from Niche; cite the specific source and methodology behind any “top-rated schools” claim rather than repeating the phrase. The safer habit for pricing documents: name the reporting period and the underlying definition (sold, listed, or modeled) every time a figure appears, and check any “Newton” data pull against the actual municipal boundary before it goes in front of a client.