Asking how much is replacing a roof is the right question, but it has no single answer, because a roof price is really four prices added together: tear-off, disposal, material, and labor, each moving with your roof size, pitch, stories, and material. The honest way to answer it is per square foot of sloped roof area, not per house, because two homes with the same footprint can have roofs 40 percent apart in size once pitch is counted. Our roof repair cost calculator prices all three scopes side by side, so you can see what replacement costs against repair before you commit.
Start with your sloped roof area. A 2,000 square foot footprint at a 6/12 pitch measures about 2,236 square feet of roof surface, and that is the number your price is built on. Multiply it by the installed rate for your material: 4.50 to 7.50 dollars per square foot for asphalt shingles, 9 to 16 dollars for metal, and 6 to 10 dollars for a flat roof system. Then adjust for stories and pitch, which is where the range widens: a three story steep roof can cost 30 percent more than a single story low slope roof of the same size.
Replacement Cost by Home Size
| Home footprint | Sloped roof area at 6/12 | Asphalt replacement range | Metal replacement range |
|---|---|---|---|
| 1,200 sq ft | 1,342 sq ft | $6,600 to $11,100 | $13,300 to $23,600 |
| 1,500 sq ft | 1,677 sq ft | $8,300 to $13,800 | $16,600 to $29,500 |
| 2,000 sq ft | 2,236 sq ft | $11,100 to $18,400 | $22,100 to $39,400 |
| 2,500 sq ft | 2,795 sq ft | $13,800 to $23,100 | $27,700 to $49,200 |
These ranges assume a single story home with a moderate pitch factor of 1.10 applied, which is how the calculator treats a 6/12 roof. A two story home adds about 15 percent, and a three story home about 30 percent, for access and handling. A steep 12/12 roof adds about 25 percent over a low slope roof of the same footprint. Run your own numbers in the calculator rather than trusting a table row, because your pitch and stories are what move you inside each range.
What Moves a Replacement Quote Up or Down
Tear-off layers are the first mover. A roof with two existing layers costs more to strip than a single layer roof, and some quotes assume one layer and charge the second as an extra. Deck condition is the second mover: rotted or delaminated sheathing found during tear-off is replaced by the sheet, and a roof with a leak history can hide several sheets of it. Flashing complexity is the third: chimneys, skylights, valleys, and wall intersections each add flashing labor, and a cut-up roofline with many of them costs more per square foot than a clean gable roof.
Material grade is the fourth mover, and it is the one homeowners control most directly. Architectural shingles cost more than three tab shingles and last longer; standing seam metal costs more than exposed fastener metal and lasts longer still. The cheapest material that meets code is rarely the cheapest roof over its life, because a roof replaced twice costs more than a roof replaced once. Compare quotes at the same material grade, or the comparison is meaningless.
Replacement vs Repair: When Replacement Is the Better Spend
Replacement wins when the math crosses two thresholds at once: more than half the roof is damaged, or the roof is past 20 years and a large section needs work. In both cases a repair buys a few years on a roof that will need replacement soon anyway, and the repair money does not reduce the replacement price later. Our repair versus replace guide covers the decision rule in full, including the 25 percent rule that can force a replacement once a repair gets large enough.
There is one more case where replacement wins even when the roof looks repairable: a roof with widespread granular loss, curling, or brittle shingles across multiple slopes. Those are age symptoms, not damage events, and patching them is cosmetic. A roofer who recommends a patch on a roof with those symptoms across the whole field is selling you time, not a fix, and the time is short.
How to Compare Replacement Quotes
Demand the same four lines from every bidder: scope in plain language, material and grade, area covered in square feet, and everything included beyond the field material, such as underlayment, ice-and-water shield, flashing, ventilation, tear-off, and disposal. Then compare the totals only after confirming the lines match. A quote 20 percent below the pack usually omits a line, not a miracle, and the omitted line is discovered after the crew is on your roof.
Use the fairness check on the pillar calculator as a second opinion: pick the full replacement scope, enter the quoted total, and see whether it sits below, inside, or above the typical range for your inputs. Inside range still deserves the written scope, because two quotes inside the same range can cover very different work. A final quote is confirmed only after an on-site inspection.
Related reading: our roof repair cost calculator prices patch, partial, and full replacement for your exact roof, plus how much is typical roof replacement and how to estimate roof replacement cost. Every tool is in the roofing calculators hub.
Not Sure Whether to Repair or Replace?
Damage extent and roof age decide it, and both are visible only on inspection. Call Zuniga Roofing Inc. for a free inspection and an exact quote with no pressure. Final quote after inspection.
Frequently Asked Questions
How much is replacing a roof on a typical house?
For a typical 2,000 square foot home in Lake County, a full asphalt shingle replacement typically falls between about 11,100 and 18,400 dollars once pitch and stories are counted. Steep roofs and three story homes push toward the top of that range, while a simple single story gable roof lands near the bottom. A final quote is confirmed only after an on-site inspection.
How much does replacing a roof cost per square foot?
Asphalt shingles typically run 4.50 to 7.50 dollars per square foot installed, including tear-off and disposal. Metal roofing typically runs 9 to 16 dollars per square foot, and a flat roof system typically runs 6 to 10 dollars per square foot. Multiply your sloped roof area, not your footprint, by the rate for your material. The roof repair cost calculator does this math for you.
What is the most expensive part of replacing a roof?
Labor is usually the largest single line, followed by the roofing material itself. Tear-off and disposal, underlayment, flashing, and ventilation are smaller lines that add up, and deck replacement is the line that surprises homeowners most, because it is found only after the old roof comes off. A quote that names each line separately is easier to compare than one headline total.
Does a roof replacement include tear-off and disposal?
A complete quote should include both, and the per square foot ranges on this page already include them. If a quote lists tear-off or disposal as a separate surprise line, or omits them entirely, it is not comparable to a quote that includes them. Ask for the disposal line in writing before you compare totals.
What time of year is cheapest to replace a roof?
Late fall and early winter are often cheaper in northern Illinois, because crews have open schedules and suppliers run promotions, but cold weather limits adhesive sealing and can delay work. Spring and early summer are the busiest and priciest months. The cheapest month matters less than the condition of your roof: a roof that leaks through winter costs more in interior damage than any seasonal discount saves.
Zayn Robert is a content specialist focused on roofing, construction, and home improvement topics. He creates easy-to-understand guides that help homeowners learn about roof measurements, materials, maintenance, and repair decisions. His work combines detailed research with practical insights from roofing professionals at Zuniga Roofing Inc.