Short answer: Exchange lists 10 roofing and waterproofing companies in New Jersey. Residential roofers must register annually with the Division of Consumer Affairs as home improvement contractors and carry at least $500,000 per occurrence in general liability insurance. Contracts over $500 must be written and can be cancelled until midnight of the third business day. Re-roofing a detached one- or two-family home is ordinary maintenance needing no permit, and the 2024 New Jersey editions of the IBC and IRC were adopted August 17, 2026.
Registration
Residential roofers in New Jersey must register annually with the Division of Consumer Affairs as home improvement contractors and show their NJHIC number.
Insurance minimum
New Jersey requires registered home improvement contractors to carry commercial general liability insurance of at least $500,000 per occurrence.
Contract rule
New Jersey home improvement contracts over $500 must be in writing and can be cancelled until midnight of the third business day after the consumer receives a copy.
No permit for re-roofing
Under N.J.A.C. 5:23-2.7, repair or replacement of existing roof covering on a detached one- or two-family dwelling is ordinary maintenance requiring no permit.
Lien timing
New Jersey residential lien claimants must lodge a Notice of Unpaid Balance within 60 days of last work and go through expedited arbitration before lodging a lien.
New codes
New Jersey adopted the 2024 NJ editions of the IBC and IRC, the 2024 IECC and ASHRAE 90.1-2022 on August 17, 2026.
Do roofing contractors need a license in New Jersey?
New Jersey has no separate roofing license, but roofers working on homes must register with the Division of Consumer Affairs as home improvement contractors under the Contractors Registration Act.
The Contractors Registration Act, P.L.2004, c.16, as amended by P.L.2004, c.155, applies to anyone selling or performing home improvements to residential property, which includes roof replacement, roof repair, gutters and residential waterproofing. Since December 31, 2005, every contractor must register annually with the Director of the Division of Consumer Affairs, carry required insurance, and file an amended registration within 20 days of any change in the information on file. The registration number, shown as an NJHIC number, must appear on contracts and advertising, which gives homeowners an easy way to check who they are dealing with.
Commercial roofing on offices, warehouses and other non-residential buildings sits outside the home improvement registration, but it still runs through the Uniform Construction Code permit system and normal business registration. The state's Business Action Center notes that limited liability companies and corporations must file with the Division of Revenue and Enterprise Services, all businesses must register for tax purposes, and workers compensation coverage is required for all employees. Some municipalities also require a mercantile license, so a roofer working in several towns should check with each municipal clerk. Homeowners can treat an NJHIC number as the minimum credential for any residential roofer, and should be wary of anyone who cannot produce one or whose registration name differs from the name on the contract.
How does a roofer register as a home improvement contractor in New Jersey?
A New Jersey roofer registers with the Division of Consumer Affairs by filing an application with an ownership disclosure statement, proof of $500,000 per occurrence liability insurance, and a non-refundable fee.
The statute fixes the insurance floor: registered contractors must maintain commercial general liability insurance of at least $500,000 per occurrence. The state's Business Action Center guide for home improvement contractors lists the core application items as an ownership disclosure statement, proof of that insurance and a non-refundable $110 application fee, and directs applicants to the Division of Consumer Affairs home improvement page for the current forms. Registration must be renewed every year, and any change in owners, address or insurance must be reported by amended registration within 20 days. Registration is a business-level credential, so it covers the company rather than individual crew members.
Workers compensation is a separate obligation, and roofing is a high-hazard trade where an uninsured fall can become the property owner's problem. Every employee must be covered, and the Business Action Center notes that corporate stockholders who work in the business must also be covered, although LLC members are not. Roofers should keep the insurance certificate current, because the contract itself must include a copy of the certificate and the insurer's telephone number. A lapse in liability coverage is not just a registration problem: it leaves the homeowner without the protection the contract promised. Firms that also raise houses out of flood zones need a separate home elevation contractor registration, with higher insurance requirements.
Which licenses, permits and registrations apply in New Jersey?
Requirement
Who issues it
When it applies
What it involves
Home improvement contractor registration
Division of Consumer Affairs
Selling or performing residential roofing and other home improvements
Annual registration, ownership disclosure, NJHIC number on contracts and ads, amended filing within 20 days of changes
Liability insurance
Contractors Registration Act
All registered home improvement contractors
Commercial general liability of at least $500,000 per occurrence, certificate attached to each contract
Written contract and cancellation notice
Contractors Registration Act
Home improvement contracts over $500
Signed contract with legal name, address, NJHIC number, total price; cancellation until midnight of the third business day
Construction permit
Municipal construction official under the Uniform Construction Code
Roofing beyond ordinary maintenance, including most non-detached and commercial buildings
Permit and inspection under the 2024 NJ subcodes adopted August 17, 2026
Residential lien notice
Construction Lien Law, county clerk
Unpaid residential roofing work
Notice of Unpaid Balance within 60 days, arbitration demand within 10 days, lien within 10 days of award
Individual contractor license
State Board of Home Improvement and Home Elevation Contractors
Six months after the board adopts rules under P.L.2023, c.237
Exam, education, experience or apprenticeship, biennial renewal with six hours of continuing education
How do I check a roofing contractor in New Jersey before I sign?
7 checks, in order, using the New Jersey registers and rules described on this page:
Ask for the roofer's NJHIC registration number and verify it on the Division of Consumer Affairs license lookup before signing any contract for residential roof work.
Get the certificate showing at least $500,000 per occurrence in commercial general liability coverage, as the Contractors Registration Act requires, and call the insurer to confirm it is current.
For a detached one- or two-family house, confirm whether the job stays within N.J.A.C. 5:23-2.7 ordinary maintenance or involves structural work that needs a construction permit.
Check that the written contract for any job over $500 shows the legal name, address, NJHIC number and total price, and includes the three-business-day cancellation notice.
For townhouses, condominiums or commercial roofs, ask the roofer which 2024 NJ subcode edition the local construction office will apply and who will pull the permit.
On storm claims, deal with your insurer directly or through a public adjuster licensed by the Department of Banking and Insurance, not through a roofer offering to negotiate the claim.
Before final payment, collect lien releases from the roofer and major suppliers, since residential lien claimants can file a Notice of Unpaid Balance within 60 days of last work.
What is changing under the New Jersey home improvement contractor licensing law?
New Jersey is moving from registration to licensing. P.L.2023, c.237, approved January 8, 2024, created a State Board of Home Improvement and Home Elevation Contractors and a future individual license.
The Home Improvement and Home Elevation Contractor Licensing Act places a nine-member board within the Division of Consumer Affairs, made up of five licensed home improvement contractors, a licensed construction code official, two public members and one government designee. Once its licensing sections become operative, no individual may perform home improvement services without a board license. Applicants will need either an apprenticeship or similar program or at least two years of supervised experience, must complete board-approved education, and must pass an examination that covers state home improvement law. Licenses will renew every two years with at least six hours of continuing education.
Timing is the key detail. Sections 9 through 13, which contain the license requirement, remain inoperative until the first day of the sixth month after the board adopts its rules, so the start date depends on rulemaking rather than a fixed calendar date. The law also amends the registration act to require financial security, a compliance bond, letter of credit or similar instrument, scaled to contract value: $10,000 for contracts under $10,000, $25,000 for contracts from $10,000 to $120,000, and $50,000 above $120,000, with alternative tiers based on the prior 12 months of contracts. Roofers should confirm with the Division which provisions apply to their current renewal.
Does a roof replacement need a permit in New Jersey?
Usually not for houses. New Jersey's Uniform Construction Code treats repair or replacement of existing roof covering on a detached one- or two-family dwelling as ordinary maintenance, which needs no permit or notice to the construction official.
The rule is in N.J.A.C. 5:23-2.7, the ordinary maintenance section of the Uniform Construction Code regulations. Ordinary maintenance can be done without filing a permit application or notifying the construction official. The same list covers repair or replacement of existing siding on one- and two-family dwellings, with an exception for polypropylene siding. The exemption is narrow, though: it is limited to detached one- and two-family homes, so townhouses, condominiums, mixed-use buildings and commercial roofs fall outside it and generally need a permit from the local construction office. Shared roofs on attached homes are a common source of confusion.
Ordinary maintenance also excludes any work affecting structural or fire safety, the removal or cutting of any structural beam or bearing support, and work that increases a building's nonconformity with the code. A re-roof that turns into replacing rafters, adding a dormer, changing the roof structure or adding the weight of solar panels is therefore not ordinary maintenance. Before tear-off, a homeowner should ask the roofer how damaged decking or framing will be handled and whether that part of the work will need a permit and inspection. Plumbing vent or electrical work on the roof has its own limits under the same section, and roof-mounted equipment changes are generally outside the exemption.
Which building code edition applies to roofing in New Jersey?
New Jersey adopted the 2024 New Jersey editions of the International Building Code and International Residential Code, along with the 2024 IECC and ASHRAE 90.1-2022 energy standards, on August 17, 2026.
The Department of Community Affairs lists August 17, 2026 as the adoption date for the current building, one- and two-family dwelling, energy, plumbing and mechanical subcodes. Roofing chapters in both model codes govern underlayment, ice barrier, flashing and re-covering limits, as amended in the New Jersey editions. The previous cycle, the 2021 New Jersey editions of the IBC and IRC with the 2021 IECC and ASHRAE 90.1-2019, had been adopted September 6, 2022. Roof assemblies, underlayment, flashing, ventilation and insulation levels for permitted roofing work are reviewed against these subcodes by the municipal construction office.
There is a transition. The Department of Community Affairs explains that for six months after the operative date of a subcode revision, a complete permit application with all prior approvals may be reviewed under the code that was in force immediately before the revision. That grace period applies only to subcode revisions. For commercial re-roofing and roof replacements that do need permits, roofers and designers should confirm with the local construction official which edition the application will be reviewed under, particularly for energy code insulation requirements when the roof deck is exposed. Projects filed after the grace period ends must follow the 2024 editions.
What must a New Jersey roofing contract include?
In New Jersey, any home improvement contract over $500, including a residential roofing job, must be written and signed by all parties, list the NJHIC registration number, and carry a three-business-day cancellation notice.
The Contractors Registration Act requires every home improvement contract with a purchase price over $500, and every change to its terms, to be in writing and signed by all parties. The contract must show the contractor's legal name, business address and registration number, include a copy of the certificate of commercial general liability insurance and the insurer's telephone number, and state the total price including any finance charges. Any later change order that alters the price or scope must likewise be written and signed, which is where roofing disputes over hidden deck damage usually start.
The consumer may cancel for any reason before midnight of the third business day after receiving a copy of the contract, and the contract must explain that right. When a contract is cancelled, the contractor must return payments within 30 days of receiving the cancellation notice. For roofing, the most useful additions are a clear scope for tear-off versus overlay, a per-sheet price for any rotted decking, the shingle or membrane manufacturer and product line, the warranty terms, and who is responsible for any permit. A roofer who will not put those items in writing is a poor bet for a job of this size.
How do lien deadlines work for roofers in New Jersey?
Under the New Jersey Construction Lien Law, roofers on residential jobs must lodge a Notice of Unpaid Balance and Right to File Lien within 60 days of last work, then arbitrate before lodging a lien claim.
The residential process was set by P.L.2010, c.119, amending the Construction Lien Law. After lodging the notice within 60 days of the last date work or materials were provided, the claimant must serve a demand for arbitration within 10 days, unless the parties agreed to another dispute mechanism. The arbitration must be completed within 30 days after the American Arbitration Association receives the demand. If the arbitrator finds a valid lien amount, the claimant must lodge the lien claim within 10 days of receiving the determination, and the overall deadline for a residential lien claim is 120 days after the last work.
Commercial roofing follows the simpler rule: the lien claim must be lodged within 90 days after the last work, services, material or equipment was provided. Either way, suit to enforce the lien generally must start in Superior Court within one year of the last work, or within 30 days after the owner serves a written demand to sue. For homeowners, the practical point is that a roofer, subcontractor or supplier who is not paid has a short and formal path to a lien, so collecting lien waivers or releases before final payment is worth the effort on any significant roof replacement.
How do storm damage insurance claims work for New Jersey roofs?
New Jersey roof claims often follow coastal storms, and the Department of Banking and Insurance says homeowners may pick their own roofer and that any public adjuster they hire must be licensed by the Department.
The Department's storm guidance tells homeowners to report losses to their agent or insurer as soon as possible. If asked, the insurer must give the name of a contractor who will do the work at its estimated price, but the homeowner is not required to use that contractor, and the Department suggests it can help to have the homeowner's own contractor speak directly with the claim adjuster. It also warns that flood insurance does not take effect until 30 days after it is sold, which matters for owners of low-lying properties who are buying coverage before hurricane season. Public adjusters are optional and paid from the settlement.
New Jersey tightened public adjuster rules with P.L.2025, c.84, approved July 1, 2025 and effective 180 days later. Public adjusters may not solicit an insured or sign a contract between 6 p.m. and 8 a.m. during the 24 hours after a loss, must use a written contract the insured can cancel within three business days, and must hold settlement funds in a New Jersey escrow account. Roofers who canvass neighborhoods after a storm should not present themselves as negotiating the claim; that role belongs to the homeowner, the insurer and, if hired, a licensed public adjuster.
Where can I verify a license and check the source in New Jersey?
Every figure and rule on this page can be checked against the primary source. These are the offices that publish them. Confirm current requirements directly before you rely on any of them:
There is no separate New Jersey roofing license. Roofers who work on homes must register annually as home improvement contractors with the Division of Consumer Affairs and display their NJHIC number. Under P.L.2023, c.237, an individual home improvement contractor license issued by a new state board will be required once the board adopts rules and the six-month lead time passes.
How much insurance does a New Jersey roofer need?
A registered home improvement contractor in New Jersey must carry commercial general liability insurance of at least $500,000 per occurrence and must attach a copy of the insurance certificate, with the insurer's telephone number, to each home improvement contract. Workers compensation is also required for all employees, including working corporate stockholders, though LLC members are not covered by that requirement.
Can I cancel a roofing contract in New Jersey?
Yes. For home improvement contracts over $500, the Contractors Registration Act lets the consumer cancel for any reason before midnight of the third business day after receiving a copy of the contract. The contractor must refund payments within 30 days of receiving the cancellation notice. The cancellation right must be explained in the contract itself.
Does a flat roof on a commercial building need a permit in New Jersey?
Generally yes. The ordinary maintenance exemption in N.J.A.C. 5:23-2.7 for repair or replacement of roof covering applies only to detached one- and two-family dwellings. Commercial buildings, townhouses and other building types are outside it, so their roof work normally needs a permit from the municipal construction office and review under the 2024 NJ subcodes.
How long does a roofer have to file a lien in New Jersey?
On commercial work, a lien claim must be lodged within 90 days after the last work or materials. On residential work, the roofer must first lodge a Notice of Unpaid Balance and Right to File Lien within 60 days, demand arbitration within 10 days, and lodge the lien within 10 days of the award, with an outside limit of 120 days.
Can a roofer handle my insurance claim in New Jersey?
A roofer can talk with your adjuster about the scope of repairs, and the Department of Banking and Insurance says that can help resolve disagreements. Advising and assisting in adjusting the claim for a fee is the role of a public adjuster, who must be licensed by the Department and, since P.L.2025, c.84, must follow written contract, cancellation and escrow rules.
When will the new New Jersey building codes apply to roofing permits?
The 2024 NJ editions of the IBC and IRC, the 2024 IECC and ASHRAE 90.1-2022 were adopted August 17, 2026. For six months after a subcode revision's operative date, a complete application with all prior approvals may still be reviewed under the previous code, so the local construction office decides which edition applies to a given permit.
