A roofing estimate is the most important document in your project — and the easiest place for a bad contractor to hide costs or cut corners. A good estimate isn't just a price; it's a scope of work. Here's how to read one like a pro, and what New Jersey law actually requires it to contain.
What NJ law requires in writing
This part isn't optional. Under the New Jersey Contractors' Registration Act, any home improvement project over $500 must be covered by a written contract before work begins. That contract has to include the contractor's HIC registration number (a 13-digit number starting with "13VH"), a description of the work, the total price, start and completion dates, and a consumer cancellation notice. If a roofer wants to start on a handshake, that's not just sketchy — it's against the rules.
The line items a real estimate includes
A complete NJ roofing estimate should spell out each of these. If any are missing, ask why before you sign:
- Tear-off scope. How many existing layers are being removed? "Tear off and dispose of existing roofing to the deck" is what you want to see — not a vague "re-roof."
- Decking inspection and replacement price. Rot is common and hidden until tear-off. The estimate should list a per-sheet price (e.g., "$X per 4×8 sheet of plywood as needed") so a surprise doesn't become a blank check.
- Underlayment. Synthetic underlayment across the field, plus ice-and-water shield at eaves, valleys, and penetrations — this is your second line of defense against leaks.
- Flashing. New step flashing, valley metal, and pipe boots. Reusing old flashing is a common shortcut that causes leaks two years later.
- Drip edge. NJ code requires drip edge at eaves and rakes. It should be on the estimate.
- Ventilation. Ridge vent or equivalent. Poor attic ventilation shortens roof life and voids some warranties.
- The specific shingle. Brand, line, and color — not just "architectural shingles." The product determines the warranty.
- Permit. Stated explicitly, pulled by the contractor in their name.
- Cleanup. Dumpster, debris removal, and a magnetic nail sweep of your yard.
- Warranty terms. Both the manufacturer's material warranty and the contractor's workmanship warranty, in writing.
Want an estimate that itemizes all of the above so you can compare it fairly against others? Call 208-903-4776 or request a free estimate.
Red flags to walk away from
- No HIC number on the document. Every legitimate NJ home improvement contractor has one. No number, no deal.
- A price that's dramatically lower than everyone else. It's almost always missing scope — usually tear-off, decking, or new flashing.
- Large deposit demands. Be cautious of anyone wanting most of the money up front. A reasonable deposit with the balance on completion is normal.
- Pressure to sign "today only." Real pricing doesn't expire at midnight. High-pressure sales tactics are a classic storm-chaser move.
- Vague one-line quotes. "Replace roof — $8,500" tells you nothing about what you're getting.
- Cash-only, no contract. Illegal over $500 in NJ, and it leaves you with zero recourse.
How to verify the contractor behind the estimate
Before you sign, confirm the contractor is registered. NJ home improvement contractors must register annually with the New Jersey Division of Consumer Affairs and carry at least $500,000 in commercial general liability insurance. You can look up a registration number through the Division of Consumer Affairs. We cover the full vetting process in our guide on finding a trustworthy NJ roofer.
The takeaway
A good estimate protects you twice — it locks in the scope so the price can't balloon, and it documents the work so you have recourse if something's wrong. Insist on itemization, check for the HIC number, and never let anyone talk you into starting before there's a signed contract in your hands.
Understanding the warranty section
Two different warranties should appear on a good estimate, and homeowners constantly confuse them:
- Manufacturer's material warranty covers defects in the shingles themselves — typically 25 years to "lifetime" depending on the product line. Crucially, many manufacturer warranties are only fully valid if the roof is installed by a certified contractor following their specifications, including proper ventilation.
- Contractor's workmanship warranty covers the installation — if a leak develops because of how the roof was put on, this is what protects you. Workmanship warranties vary widely between contractors, so it's a real point of comparison. Get the length and terms in writing.
Deposits and payment schedules done right
A fair NJ payment structure usually looks like a modest deposit to schedule and order materials, possibly a progress payment, and the balance on satisfactory completion. Be skeptical of any contractor demanding most or all of the money before work begins — that's both a financial risk and a motivation problem. The balance-on-completion structure is your leverage to ensure the job is finished correctly, including cleanup.
Why the cheapest quote usually isn't
It's tempting to take the lowest number, but the cheapest estimate is frequently cheapest because of what it omits. Common "savings" that cost you later: reusing old flashing (leaks in a year or two), skipping ice-and-water shield (water intrusion at eaves and valleys), an overlay instead of a tear-off (traps problems under the new layer and can't legally go over two layers in NJ), and no decking allowance (turns into a surprise bill or, worse, shingles nailed over rot). When you normalize all the estimates to the same real scope, the "cheap" one often isn't the cheapest at all.
Frequently asked questions
Should the permit cost be a separate line?
It can be listed separately or rolled into the total, but it should be mentioned, and the contractor should pull it in their name. Permit fees in NJ typically run $150–$500 depending on the town.
What if they find more decking damage than estimated?
That's exactly why the per-sheet price matters. With it, extra decking is a predictable per-unit cost you agreed to in advance — not an open-ended surprise.
Is a verbal quote ever okay?
For a ballpark conversation, sure. But for the actual job, NJ law requires a written contract over $500. Get the real number in writing before any work or commitment.