Roof Replacement Cost Per Square in NJ
Learn how roofing squares measure a roof and how materials, pitch and affect the scope. Get a written estimate at a free inspection.
A roofing square is 100 square feet of roof surface. The estimate for that area depends on materials, pitch, existing layers, access and deck condition. Your project consultant measures the roof at the free inspection and gives an exact written estimate.
Roofing squares help describe the size of a project. Here is how to understand that measurement, how materials change the work and what to compare in written bids.
What Is a Roofing Square?
One square is a 10 by 10 foot area, 100 square feet of finished roof. The unit exists because shingles have long been packaged and sold to cover a square at a time, so a roofer who knows the square count knows the order. A 24-square roof needs 24 squares of shingles plus starter, and a cutting allowance.
The square count is roof surface, not floor area and not the footprint. A steeper roof has more surface over the same footprint, and a two-story house has far less roof than a ranch with the same living space.
How Many Squares Is a Typical NJ Roof?
There is no published New Jersey average for roof area, so we will not invent one. Fixr’s national replacement guide uses a 1,700 square foot home with about 2,000 square feet of roofing, or 20 squares, as its typical case. That is a reasonable middle for the housing stock in our area.
You can get close yourself with a tape measure and a little arithmetic:
- Measure the house footprint and add the overhangs. A 28 by 40 foot colonial with 1 foot eaves on every side is 30 by 42, or 1,260 square feet.
- Multiply by a pitch factor. A 6/12 roof has 1.118 square feet of surface for every square foot of plan; an 8/12 roof is 1.202; a 12/12 roof is 1.414. Our colonial at 8/12 is 1,260 × 1.202, about 1,515 square feet.
- Divide by 100. That colonial is about 15 squares before waste.
Run the same steps on a 24 by 32 foot cape at 12/12 and you get about 13 squares; a 30 by 60 foot ranch at 5/12 comes out near 22. A large house in Franklin Lakes or Morristown with wings, a garage and several dormers can pass 40. Porch roofs, garages and dormers all add squares, and each valley and hip adds cutting waste on top.
Cost per Square by Material
A material comparison is useful only when the proposals cover the same work. The table below identifies installation details to discuss alongside measured roof area.
| Material | What changes the scope | What to confirm |
|---|---|---|
| Asphalt shingles (3-tab) | Roof pitch, tear-off layers and decking condition | Underlayment, flashing and ventilation |
| Architectural shingles | Shingle system, roof layout and installation details | Product line and complete roof-system components |
| Cedar shake | Material handling and ventilation requirements | Deck preparation and flashing details |
| Metal | Panel type, seam details and penetrations | Standing seam or exposed-fastener system |
| Clay tile | Weight, handling and structural requirements | Roof support and underlayment scope |
| Slate | Weight, structural support and installation labor | Reinforcement needs and flashing details |
| Flat roof (rubber, EPDM) | Membrane, seams, penetrations and drainage | Deck preparation and roof-edge details |
Material names alone do not define a scope. Metal can mean exposed-fastener panels or , with different installation details. Ourmetal roofing page explains the difference. Ask each bidder to name the system and account for the same tear-off and preparation work.
For a full-project view, ournew roof cost guide for NJ explains how roof size, materials and existing conditions shape the written estimate.
What a Per-Square Price Should Include
A per-square number is only comparable if both bids put the same work inside it. A complete asphalt replacement bid normally covers:
- Tear-off of the existing roof down to the deck, and disposal
- Inspection of the deck, with a stated price for any that has to be replaced
- at the eaves and in valleys
- Synthetic over the rest of the deck
- New and new at walls, chimneys and skylights
- , field shingles, hip and ridge cap
- : , and intake at the where the house allows it
- New pipe boots and cleanup, including a magnet sweep of the yard for nails
Ask whether removal and disposal are included. Multiple layers and heavier materials change debris handling, while access affects loading and cleanup. Hidden deck damage may only become visible during tear-off, so the proposal should explain how additional sheathing work is documented and approved.
Laying new shingles over old ones changes the math, but it is not always allowed. The residential code New Jersey adopts, the International Residential Code in its NJ edition, follows the model-code rule that a new layer cannot go over two existing layers or over a roof that is water-soaked or deteriorated, as NRCA’s Professional Roofing summarizes.
What Pushes the Price per Square Up
- Pitch. HomeAdvisor’s shingle replacement page notes that roofs steeper than 6/12 carry higher labor costs. Above about 8/12, crews need roof jacks and planks to stand.
- Complexity. A simple gable has two planes. A colonial with a front gable, two dormers and an attached garage might have ten, each with its own valleys, flashing and waste.
- Height and access. Three-story homes, steep driveways and houses tight to the lot line in places like Fort Lee or Englewood slow down loading and removal.
- Small roofs. A garage or porch roof carries fixed costs such as the dumpster, delivery and setup, so its per-square price is higher than a full house.
- Upgrades. A higher shingle line, a full ice and water deck in a valley heavy design, or copper flashing each lift the number.
Future Remodeling Roofing Options
Future Remodeling (FHRG LLC, Bergenfield, NJ, #13VH13329600) offers a free in-home estimate. With any roofer, ask for the measured square count and a written proposal that lists what is included line by line, so you can compare bids square for square. We are a GAF and GAF Metal Certified contractor and install GAF Timberline HDZ® and UHDZ shingles, GAF TimberSteel™ and Drexel standing seam metal, and Brava composite tile. See the roofing page and the asphalt shingle page for the details, and service areas for the towns we cover in New Jersey and Westchester County. Payment options are on the financing page.
Frequently Asked Questions
How many squares is a 2,000 square foot house?
It depends on the footprint and the pitch, not the living area. A two-story colonial with 2,000 square feet inside has a footprint near 1,000 square feet, which works out to roughly 13 to 15 squares of roof once overhangs and pitch are added. A 2,000 square foot ranch can be twice that.
Does the price per square include tear-off?
Sometimes. Some bids include removal and disposal, while others list them separately. Existing layers, material weight and access affect that work. At the free inspection, your project consultant gives an exact written estimate that identifies what is included.
Why do two roofers measure different square counts?
One estimate may use the measured surface and the other the material ordered, which includes a waste allowance for cuts at hips, valleys and rakes. Compare bids on the same basis, or ask each roofer for the measured area and the order quantity separately.
Recap
A square is 100 square feet of roof surface. Count yours from the footprint, overhangs and pitch, then compare the complete scope rather than area alone. Materials, removal, decking, flashing and ventilation all affect the work.Book a free inspection for an exact written estimate from your project consultant.