How much does it cost to replace a roof on a 3500 square foot house?

Calculating the price of a new roof involves just 4 main factors: material costs, labor, roof design, and geographical location. 

If you live in Idaho and you want to get a price range on the cost of a new roof, you can continue reading this article, or just use our Free Roofing Cost Calculator! Our calculator is based on actual roofing estimates for homes in Idaho, and you can see the low, average, and high roofing estimates for homes similar to yours.

Try our roofing cost calculator!

If you would like to calculate your own roofing estimate, just follow these six steps: 

Step 1: Find Your Roof's Square Footage

The first step is to find the total square footage of the roof. This is different from the square footage of your house, as it accounts for the roof’s slope (pitch). A simple way to estimate this is to multiply the footprint of your house (in this case, 3500 square feet) by a factor depending on the pitch of your roof. For example:

  • A flat roof might have a factor of 1.0

  • A moderately sloped roof could be 1.15 to 1.25

  • A steep roof might be 1.25 to 1.5

If your home is 3500 square feet with a moderate slope, the roof area could be approximately 4025 to 4375 square feet.

Step 2: Calculate your roofing materials

Roofing materials vary widely in cost, durability, and appearance. But asphalt shingles are the most popular as they are cost-effective, easy to install, and decent longevity. Asphalt shingles range from $3 to $5 per square foot.


Step 3: Factor in Removal Costs

If you’re replacing an old roof, removal costs need to be considered. On average, removing an old roof costs between $1 to $5 per square foot, depending on the material and the complexity of the job.


Step 4: Roof Installation and Labor Costs

Labor costs for roof installation vary by region and the complexity of the roof design. Typically, labor can cost anywhere from $1.50 to $3.00 per square foot. 


Step 5: Include Additional Expenses

Additional costs can include:

  • Permits: Depending on where you live, you might need a permit to replace your roof, which can range from $100 to $1,000.

  • Rain Gutters and Flashing: If you need to replace rain gutters or flashing, this can add $3 to $10 per linear foot.

  • Geographical Considerations: Depending on your location, costs can vary. For example, prices in urban areas or regions prone to severe weather conditions may be higher.


Step 6: Calculate Total Cost

Let’s calculate the total estimated cost for a moderately sloped 3500 square foot roof with mid-range asphalt shingles:

  • Material Cost: $3.50/sq ft x 3500 sq ft = $12,250

  • Removal Cost: $3/sq ft x 3500 sq ft = $10,500

  • Labor Cost: $2/sq ft x 3500 sq ft = $7,000

  • Miscellaneous Costs (Permits, Gutters): Approximately $1,000


Conclusion

A new roof for a 3500 square foot home in Idaho could get estimates higher than $30,750, but you can also expect to see lower estimates around $16,190. On average, a new roof for a home in Idaho would cost $19,830. Calculating the cost of a new roof involves a detailed analysis of materials, labor, and additional expenses. By following the steps outlined above, Idaho homeowners can gain a clearer understanding of the potential costs involved in roofing projects. Remember, you can get a more accurate quote by contacting J&B Superior Exteriors or you can:

Try our roofing cost calculator!