ROOFING
Flat Roof Replacement Cost: Per Square Foot in 2026
Estimate flat roof replacement cost per square foot — with the free roofing calculator.
Flat roofs cover garages, additions and modern homes — and they need different materials than sloped roofs. Here's the real 2026 replacement cost per square foot.
THE SHORT ANSWER
The short answer
Flat roof replacement runs $6–$18 per sq ft in 2026 depending on material. EPDM rubber runs $6–$12 per sq ft; TPO runs $7–$14; modified bitumen $6–$10. A typical 1,500 sq ft flat roof runs $9,000–$27,000.
What it costs
EPDM (rubber) runs $6–$12 per sq ft installed. TPO runs $7–$14. Modified bitumen runs $6–$10. A typical 1,500 sq ft roof runs $9,000–$27,000. Removal of the old membrane adds $1–$3 per sq ft. New insulation adds more.
- EPDM rubber: $6–$12 per sq ft
- TPO: $7–$14
- Modified bitumen: $6–$10
- 1,500 sq ft roof: $9,000–$27,000
Flat roof materials compared
EPDM is the budget classic — black rubber, 20-30 year life, easy to patch. TPO is the modern favorite — white, reflective, energy-efficient, 20-25 years. Modified bitumen is asphalt-based, affordable, shorter life. All need professional seams to last.
Try the roofing calculator
Enter the area, material and labor per sq ft to see the total.