Cost of Roof Replacement

Investing in a new roof is a big decision, but typically one that is required to protect you and the value of your home over time. Whether your roof replacement is due to wear or purely cosmetic, you will want overall project costs and a timeline before moving forward:

Average Project Cost Cost Per Square Foot Timeline
$7,000-$75,000 $3.50-$20.00 1 week – 1 month

Why such a large range? Learn more below about how the price of roof replacement is projected based on a variety of factors.

How Are Roofing Estimates Determined?

Roofs come in all shapes and sizes. Some may be layered with old existing roofs and others are customized by flashing details like a stone wall or aluminum capping. The easiest way to determine how much it will cost to replace your roof is to:

  • Call a reliable roofing company
  • Schedule a time for a roofing contractor to inspect your roof
  • Receive an estimate based on inspection

Getting an estimate will provide you with the most accurate cost for your roof replacement, though general roofing calculations are based on the following factors:

Roof Size

Calculating the square footage of your roof allows the contractor to estimate the materials and labor required for the job. The more surface area, the higher the cost.

You can get a rough idea of your roof’s square footage by multiplying the length by width (in feet) of all flat planes and adding them together. Keep in mind, measurements should run to the edge of each surface to account for areas that project beyond your home, like overhangs or eaves.

Roof Shape & Design

After replacing flashing around the chimney

Calculating square footage varies based on whether your roof is one huge surface or not. The intricacies of your roof can drastically affect labor costs when contractors need to work around skylights, ventilation, steep a-frames, roofs with dormers, and other architectural design elements.

The industry term “cut-up” is used to describe a roof that has complex features that have an effect on material and labor costs.

Roof Materials

The cost of your roof replacement will vary depending on the type of materials you choose, or in some cases, are required to use based on building codes or HOA rules.

High-quality shingles valued for their performance overtime are a smart investment but can run up the overall cost. When you decide to work with a GAF Master Elite roofing company, you can expect reliable materials and superior warranties that ensure the aesthetic and durability of your roof outlasts other competitors.

Condition of the Existing Roof

GAF Elite Master RoofersIf you’re seeking a new roof because your existing roof is severely damaged, then labor could be costly because there is more work required to restore the underlying structure.

Roofing contractors will also want to understand what kind of sheathing is on the existing roof. This is another factor that will gauge the level of labor necessary to remove the old roof before installing a new system.

Typically, contractors will include what is known as “waste factor” into your roof replacement estimate. This calculation varies based on roof materials and style but accounts for material that overlaps in specific areas, like around flashings, valleys, and hips.

Will there be old material that needs to be removed and disposed of? If so, your estimate may include additional fees for a dumpster rental or general disposal fees.


Is there proper ventilation in place or does the new roof require ventilation intake? If the existing roof doesn’t have adequate airflow, the roofing contractor will need to factor that into the labor too.

Schedule Your Free Roofing Estimate

When it comes down to determining the cost of your roof replacement, it’s always recommended to receive an accurate quote from a trusted roofing company. At Porter Family Contracting, we provide contactless free estimates and 0% financing options to ensure you receive an affordable roof replacement that fits into your budget.

For over 40 years, we have specialized in roof services throughout Delaware County, Upper Bucks County, Chester County, the Main Line, New Jersey, and Northern Delaware. We pride ourselves on our quality craftsmanship and exceptional customer service so that you can not only enjoy your new roof for years to come but feel at ease during the replacement process.