NJ Landlord Law · Updated September 2026
In New Jersey, every residential lease comes with a promise you never wrote down: the unit will be fit to live in, and you'll keep it that way. Break it and a tenant can fix the problem and deduct the cost, withhold rent, or walk away from the lease. Here is what the law requires, the heat and pest rules, and what tenants can do when repairs don't happen.
The short answer. New Jersey leases carry an implied warranty of habitability. The landlord must keep the unit safe, sanitary and fit to live in, including heat, hot and cold water, electricity, working plumbing, smoke and carbon monoxide alarms, and freedom from infestation. The tenant is responsible for damage they cause beyond normal wear and tear.
If you don't repair. After written notice and a reasonable chance to fix a problem with a "vital facility," a tenant can repair it and deduct the cost, withhold rent, seek a rent reduction in court, or treat the lease as ended.
Heat. In buildings of three or more units: at least 68°F from 6 a.m. to 11 p.m. and 65°F overnight, October 1 to May 1.
The New Jersey Supreme Court established in Marini v. Ireland (1970) that residential leases include an implied warranty of habitability: renting a unit means promising it's livable and agreeing to keep it that way. It doesn't matter whether the lease says so, and a lease can't take it away.
The tenant's side of the deal: return the unit in the condition they received it, except for normal wear and tear, and pay for damage caused by malicious or abnormal use (Dowler v. Boczkowski, 1997).
The detailed repair standards depend on building size:
| Building | Rules that apply | Who enforces |
|---|---|---|
| 3 or more units | State Regulations for the Maintenance of Hotels and Multiple Dwellings (N.J.A.C. 5:10), plus local ordinances | DCA Bureau of Housing Inspection. Buildings must be registered with it and are inspected on a 2, 5 or 7-year cycle depending on their violation history |
| 1 or 2 units | Local property maintenance and housing ordinances | Your municipality's code enforcement, building or health office. Non-owner-occupied 1 and 2 unit rentals also register with the municipal clerk |
The implied warranty of habitability applies either way.
Under the multiple dwelling regulations, the owner must keep the property in good repair, clean, free of infestation and free of hazards or nuisances that could harm occupants, and provide basic maintenance including heat, building security, smoke detection, and working plumbing and electrical systems (N.J.A.C. 5:10-5.1). In practice, for any rental:
In buildings of three or more units, every unit must have heat that maintains at least 68°F from 6:00 a.m. to 11:00 p.m. and 65°F at other hours, from October 1 through May 1 (N.J.A.C. 5:10-14.4). The owner supplies the fuel unless the unit has separate heating equipment and the lease makes the tenant responsible for it. For one and two unit buildings, local ordinances set the standard. If heat fails and the landlord doesn't act after notice, the local board of health can order the repairs itself.
In multiple dwellings, the owner is responsible for getting rid of insects, rats and other pests whenever the infestation is in two or more units or in common areas, and must have the building professionally treated at least once a year, more often if pests keep returning (N.J.A.C. 5:10-10.2). A problem confined to a single unit isn't covered by that rule, so spell out in the lease who pays in that situation. In one and two unit rentals, check your local ordinance, and put the same clause in the lease.
Bed bugs are the exception owners feel most. They travel between units, so a building-wide response is usually cheaper than arguing over the first unit.
One and two family houses and multiple dwellings must have smoke alarms and carbon monoxide alarms. CO alarms aren't required in buildings with no fuel-burning appliances and no attached garage. For one and two family houses, you need a Certificate of Smoke Detector and Carbon Monoxide Alarm Compliance from the local fire official at every change of occupancy (N.J.S.A. 52:27D-192).
Pre-1978 multiple dwellings and tenant-occupied one and two family homes fall under New Jersey's lead-safe rules. You must post a notice telling tenants to report deteriorated paint, and respond within 30 days, or within one week if a pregnant woman or a child under six lives in the unit or the problem is in a common area. Our guide to NJ lead paint rental inspections covers the inspection requirement.
New Jersey gives tenants real remedies, which is why slow repairs are expensive. All of them require the same three things first:
Once those are met:
Cosmetic issues and minor inconveniences don't qualify. And New Jersey's reprisal law (N.J.S.A. 2A:42-10.10) bars a landlord from serving a notice to quit or filing for possession, the steps behind any eviction, non-renewal or rent increase, as payback for a tenant's good-faith complaint to a code official.
The habitability fights we see almost never start with a landlord who refused to fix something. They start with a slow response, no paper trail and a tenant who got frustrated. What works:
Anything needed to keep the unit safe, sanitary and livable: heat, hot and cold water, electricity, plumbing, smoke and CO alarms, locks, structural safety and pest control under the state rules. Tenants pay for damage they cause beyond normal wear and tear.
For most repairs, the law requires a reasonable time after notice, and what's reasonable depends on the problem. Lack of heat or water is urgent. Deteriorated lead paint has a set clock: 30 days, or one week where a pregnant woman or child under six lives.
In multiple dwellings, yes, when the infestation is in two or more units or common areas, plus at least annual preventive treatment. A single-unit problem isn't covered by that rule, so the lease should say who pays.
In buildings of three or more units, at least 68°F from 6 a.m. to 11 p.m. and 65°F overnight, from October 1 to May 1. One and two unit buildings follow local ordinances.
Yes, if the problem involves a vital facility the tenant didn't cause, and the landlord got notice and a reasonable chance to fix it. The tenant should set the money aside, because a court will usually require it to be deposited.
New Jersey's rules set a heating standard, and we're not aware of an equivalent statewide cooling requirement. But if air conditioning was part of the original tenancy, courts have treated it as a vital facility, so a failure can affect habitability.
New Jersey doesn't ask landlords for perfection. It asks for a livable unit and a real response when something breaks. Answer fast, write everything down and fix the vital things first, and the tenant remedies above never come into play.
This guide is general information for landlords, not legal advice. Local ordinances vary. Confirm the rules for your property or talk to an attorney.
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