How much does a new roof cost for a 3,500 square foot house?
Short answer. A 3,500 square foot two-story home usually has roughly 22 to 30 squares of roof including the garage, which often puts a North Georgia shingle replacement near the top of the typical $8,000 to $16,000 range or into the large-roof range of about $15,000 to $25,000. A one-story home that size can carry 40 or more squares, and steep or complex designs commonly run $20,000 and up.
From house size to roof size
- Divide living area by the number of stories to estimate the footprint. A two-story 3,500 square foot home has a footprint near 1,750 square feet.
- Add the overhangs and any attached garage or covered porch.
- Multiply by a pitch factor, about 1.12 for a 6 in 12 roof and more for steeper roofs.
- Divide by 100 to get squares, then add waste for cuts.
A one-story home of the same size has roughly twice the footprint, so roughly twice the roof.
Features that push larger homes higher
- Steep front gables and tall walls common on newer Atlanta-area homes.
- Multiple hips, valleys, dormers and turrets, which add flashing, cuts and waste.
- Three-story walls on walkout lots that need extra safety setup.
- Several chimneys, skylights or roof-to-wall transitions.
- Designer or impact-resistant shingle lines, which cost more per square on a lot of squares.
Ways to keep it in check
- Make sure every bid is built on the same measured square count.
- Get a per-sheet decking price in writing.
- If storm damage is possible, have the roof inspected first; a covered claim changes your share considerably.
See how roofers measure a roof and roof replacement cost in Georgia.