Columbus rates, not national averages. Pick a roof type and size, set pitch, height and material grade, and the calculator returns a 2026 budget range with the six line items behind it.
Planning estimate only. The final number depends on decking condition, how many layers come off, ventilation, code upgrades and access — none of which can be read from a form.
The calculator is not a lookup table of finished prices. It prices a roof the way a bid is assembled: six line items per square, each with its own low and high rate, then three multipliers for the things that change how long the job takes. Nothing is hidden behind the total, which is why the breakdown on the right adds up to the range at the top.
A square is 100 square feet of roof surface, measured on the slope rather than on the floor plan. Most Columbus houses fall between 18 and 35 squares, and a 1,800 square foot single-story ranch is usually 22 to 26.
| Line item | Rate per square | Scales with grade? |
|---|---|---|
| Tear-off & disposal | $50 – $95 | No |
| Underlayment & ice/water shield | $22 – $40 | Yes |
| Roofing material & installation | Shingle $250 – $420 Metal $700 – $1,200 Flat $380 – $650 Repair $140 – $320 | Yes |
| Flashing, valleys & details | $28 – $60 | No |
| Cleanup & magnetic nail sweep | $10 – $22 | No |
| Permit, dump fees & misc | $9 – $18 | No |
Four of those six are fixed work: stripping the old roof and hauling it away, new flashing at walls, valleys and penetrations, cleanup with a magnetic sweep of the lawn and drive, and the permit and dump fees. Together they run $97 to $195 a square whatever goes back on the roof, which is the reason a premium roof never costs double a builder-grade one.
Two last rules. Any job whose low end lands under $1,200 is scaled up to $1,200, because a crew, a dumpster and a permit cost what they cost whether the roof is six squares or sixty. And the output is rounded: the total to the nearest $50, each breakdown line to the nearest $25, the per-square figure to the nearest $5. Rounding is the only thing between the arithmetic and the number on screen.
Every figure the tool returns is a range rather than a single number, and that is deliberate. Two roofs of identical size on the same street can be priced a third apart on access, layout and how much flashing detail the roof carries. A calculator that answers with one number is hiding that spread rather than resolving it.
These are standard-grade runs of the calculator on roofs that are common in Columbus.
The spread inside each range is not padding. The low end is a clean tear-off over sound decking with easy access and simple flashing; the high end is the same roof with a cut-up layout, difficult staging and a full detail package. A bid that lands inside the range is priced normally for this market. A bid well below it is usually missing a line item rather than beating the market.
Small jobs behave differently. Pick the repair setting and the calculator prices a partial roof, a section, a porch or a tear-off around a leak, at $140 to $320 a square for material and labor rather than the full-roof rate. At 6.6 squares, the 660 square feet people often search for, the total is small enough that the $1,200 floor starts to matter: mobilising a crew, a dumpster and a permit for half a day costs roughly the same as it does for a whole roof, so the price per square on a small job always looks high next to a full replacement.
The six line items cover the roof covering and the work to put it on. Everything below is real, common on Columbus houses, and priced separately by whoever does the work.
The permit itself is in the estimate. A re-roof inside the city is permitted, inspected work, and the fee, the dump charges and the inspection time sit inside the $9 to $18 miscellaneous line. What is inspected, and who pulls the permit, is covered in the Columbus roofing permits guide.
A calculator is a budgeting tool. It knows the roof's size, shape class and material, and it knows local rates. It cannot see the decking, count the layers already up there, look at the flashing at the chimney, or tell whether the attic is venting. Those four unknowns are what separate the low end of a range from the high end, and only a person on a ladder can settle them.
Get a written quote once the range here is close enough to plan around, or sooner if there is an active leak, if a storm has taken shingles off, if the roof has two layers already, or if the house is being listed or sold. A quote worth comparing states the tear-off depth, the underlayment product, how far the ice barrier runs and whether it wraps the valleys, whether flashing is new or reused, the ventilation plan, and the workmanship warranty in years alongside the manufacturer's warranty. Print the breakdown from this page and set it beside the bid: the six lines here should map onto the scope there.
One Ohio rule is worth knowing before an insurance job. A contractor may not absorb, rebate or discount an insurance deductible. An offer to make the deductible disappear is insurance fraud, and it is a reason to end the conversation rather than a discount.
Each guide takes the same rates further: grades, materials, code and what a Columbus job actually involves. Start with shingle roof replacement for asphalt, metal roof replacement for standing seam, exposed-fastener panel and metal shingles, or flat roof replacement for EPDM, TPO and PVC membranes. If the roof may be patchable rather than finished, the shingle roof repair guide covers where repair still makes sense. The full 2026 cost tables for every type and size are on the home page.