10 Deal Killers That Sink North Jersey Multi-Family Deals: Catch These Before You Make an Offer

Every multi-family deal that loses money looks great on paper. It has a tidy rent roll, a fair price, and a cap rate that makes you nod. The problems live underneath, and in North Jersey they wreck unsuspecting buyers the same way every time: after closing. After 15 years underwriting multi-family deals in Paterson, Clifton, Passaic, and across Passaic and Bergen County, I have watched investors hand back the same ten mistakes over and over. I call them the deal killers. Here is what each one costs you, and how to catch it before you write an offer.

Deal Killer #1: The Rent Roll That Was Never Real

A rent roll is a sales document, not an audit. Check every rent against the real block: two-bedrooms in Clifton run about $2,650 to $3,000 and up, in Paterson about $1,800 to $2,400, in Passaic about $1,700 to $2,200, and in Totowa about $2,900 to $3,000. When every unit sits at the top of the local band, ask why, and the answer has to hold up. Pull the signed leases and the HAP contracts on any voucher unit. No lease means no verified income: an empty unit's projected rent counts at zero until somebody signs. I walk investors through this line by line in my rent roll guide.

Deal Killer #2: Property Taxes That Quietly Eat Your NOI

New Jersey already carries the highest property taxes in the country, and Passaic County sits near the top of that pile. Effective property tax rates run roughly 2.4% to 2.7% across the county, with Paterson closer to 3% on many properties and Totowa as low as about 1.5%. Bergen County averages around 2.2% to 2.4%, versus a national average near 1%. On a Paterson four-family near $500,000, a 3% effective rate is $15,000 a year before you collect a dollar of rent. Underwrite with the town's real effective rate, from the assessor or a broker who closes there, never the listing's tax estimate.

Deal Killer #3: Rent Control You Did Not Underwrite

Clifton's Chapter 363 restricts annual increases on larger multiple dwellings, Paterson's Chapter 381 caps increases on many two-family-and-up buildings, Passaic tightened its rent stabilization ordinance in 2025, and Woodland Park has had rent control on the books for years. Garfield, on the other hand, is not a rent-controlled town. If your BRRRR exit or five-year cash flow projection depends on rents jumping to market tomorrow, but the town caps increases near three percent a year, your projection is fiction. Underwrite rent growth at the cap, and treat any increase above it as a bonus, never as the plan.

Deal Killer #4: The Refinance That Will Not Appraise

BRRRR works here: buy, rehab, rent, refinance, repeat, and I have helped investors run it in Paterson, Passaic, and Clifton. But the R only pays off if the cash-out refinance actually delivers. The appraiser has to agree with your after-repair value. If he comes in under, you stay stuck paying hard-money interest, which runs double-digit numbers here, and the deal flips from a wealth builder into a wealth eater. Underwrite the after-repair value with broker price opinions and sold comps before you buy, not after you rehab. Forced appreciation is real only when rents you can actually collect and comps already sold back it up. The full strategy is in my BRRRR playbook.

Deal Killer #5: The City Inspection You Never Budgeted

North Jersey cities actually enforce their rental rules, and that enforcement kills unready buyers. Paterson requires landlords to register rental units every year, and the Housing Bureau inspects whenever a tenancy changes before the new tenant can move in. Community Improvements handles the certificates at 973-321-1232. Passaic requires multiple-dwelling registration and a Certificate of Re-Rental Approval inspection before a vacant unit leases, and three-or-more-family buildings need an occupancy certificate, a hardwire report, fire certification, and smoke and carbon monoxide detectors. A unit blocked while you fix violations bleeds about $77 a day on a $2,300 rent. Budget the inspections, and rent legally from day one.

Deal Killer #6: Section 8 HAP Math You Ran Wrong

Section 8 vouchers are dependable income here, but only when you underwrite them correctly. The Bergen-Passaic fair market rent for fiscal year 2026 is $2,324 for a two-bedroom and $2,835 for a three-bedroom. Local housing authorities set payment standards near 90% to 110% of those figures, and the voucher usually pays the payment standard, not your dream market rent. If the rent roll shows a voucher unit far above the payment standard, the tenant is covering the gap out of pocket, and you should not underwrite that gap as permanent. And every voucher unit has to pass the housing quality standards inspection and keep passing it: failed inspections stop payments until the unit is fixed. Model Section 8 as a dependable ceiling, with inspection dates on the calendar, not just rent days.

Deal Killer #7: Deferred Maintenance With a Dated Roof

Older multi-family buildings in Paterson, Passaic, and Clifton were built to last, and they are exactly why maintenance bills cluster the moment you close. Roof, boiler, electric panel, water heater: if any is at end of life, plan real numbers. A roof replacement here runs roughly $15,000 to $25,000, and a boiler swap about $8,000 to $15,000. A pro forma with no capital-reserve line is not honest, it is a gift to the seller. Underwrite reserves of at least $150 to $300 per unit per month, and ask when each major system was last replaced before you offer, not after you own it.

Deal Killer #8: The Tenant Whose History You Never Ran

An eviction in New Jersey is slow, and it is expensive: legal fees, lost rent, turnover, and damage can run into five figures before it is over. Screen hard beforehand: credit, income of at least three times rent, prior landlord references, an eviction search, and an application process that follows state law. Hold the security deposit right: it is capped at one and a half months' rent, must sit in an interest-bearing account, and has to be returned, with interest, within thirty days of move-out, or you can owe up to double what you withheld. The deposit rules sound dry. They are not dry. They are the difference between a tenant turnover you survive and one that trims your equity.

Deal Killer #9: Off-Market for a Reason

I source off-market deals through probate, estate sales, and landlord exits every week, and many are legitimately great. But ask why this property never hit the market. The reasons are usually fixable: deferred maintenance, a tenant you cannot fully inspect, title issues, unpaid taxes, or a family still deciding whether to sell. They can also be expensive: the lowest price-per-door in Paterson can be the most expensive building you will ever own if you never asked why. Pull the full history, talk to a landlord broker who knows the block, and verify the reason before you offer, not after. If you want the sourcing playbook, it is here.

Deal Killer #10: The Cap Rate You Bought, Not the Cash You Need

Cap rates near 9% on older Paterson multi-family buildings and about 6.5% to 8% in Clifton sound amazing on paper. But the cap rate ignores debt service, and what you actually live on is cash-on-cash return after the mortgage. Run the full line-by-line model: vacancy and collection loss, property management at about 8% to 10%, taxes, insurance, water and sewer, maintenance, and reserves, then subtract debt service and see what actually lands in your bank account every month. If your deal only works at full occupancy, no management fees, and zero vacancy, it does not work. The goal is not the fattest cap rate. It is the building that still cash flows the year the boiler dies, the vacancy hits, and the inspection lands. I walk investors through this model line by line in my cash flow guide.