How Much Does It Cost To Install A Flat Roof?


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Flat Roof Installation Costs

Outdoor Cost Guides      Roofing      Flat Roof Installation Costs

Flat roofs are a standard option for many different types of buildings. They are often used for businesses, but they can work quite well in homes, as well. Those who are considering getting this type of roofing will want to get a better idea of the flat roof installation cost.

Naturally, many factors will go into the overall cost of installing one of these types of roofs. This includes the size of the roof, the type of roof materials that will be installed, and the overall labor that will go into the roofing. For example, the cost of asphalt will vary from the cost of EPDM or PVC.

Flat roof installation: 2,000 sq.ft., installation included in the material cost.

Item Unit Cost Total Cost
EPDM roof $5.50-$7.00 per square foot $11,000-$14,000
PVC roof $6.50-$7.50 per square foot $13,000-$15,000
Thermoplastic polyolefin roof $6.00-$7.00 per square foot $12,000-$14,000
Installation $5.50-$6.50 per square foot $11,000-$13,000
Insulation $1-$2 per square foot $2,000-$4,000
Total Cost   $13,000-$19,000

Other considerations and costs

  • Flat roofs will need to have ventilation.
  • The addition of roof drains, and ventilation could add another $200 to $300 to the cost for each drain or vent added.
  • If the plywood on the roof is damaged, it will need to be replaced.
  • The tear-off and removal of material from an old roof will add to the flat roof installation cost.
  • Always choose a company for your installation that has a good reputation and a lot of experience in the field.

Check out our guide if you need a loan for your home improvement project.

DIY considerations

  • Some types of roofing will be easier to install than others. For example, EPDM is often a DIY solution because it goes on smoothly. Other types of flat roofs will need to have the help and guidance of a professional.
  • If you are going to be doing any DIY on the roof, you need to consider your safety and make sure you have all of the appropriate gear.
  • Any DIY work that you do on the roof, whether it is adding the EPDM or removing discarded materials, can help you to reduce your costs.


  • Craftsman Estimator Costbook, complete series year 2019.
  • Latest prices found on Home Depot and other vendor Web sites.
  • Literature review of DIY Web sites.
How much does it cost to install a flat roof in your city?
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Cost by city

  • New York, NY$25,702
  • Bronx, NY$21,120
  • Brooklyn, NY$17,603
  • Philadelphia, PA$21,960
  • Washington, DC$19,056
  • Atlanta, GA$17,240
  • Miami, FL$15,680
  • Fort Lauderdale, FL$16,425
  • Minneapolis, MN$19,269
  • Chicago, IL$22,450
  • Houston, TX$23,156
  • San Antonio, TX$15,544
  • Austin, TX$17,600
  • Denver, CO$14,871
  • Phoenix, AZ$15,689
  • Las Vegas, NV$17,220
  • Los Angeles, CA$19,403
  • San Diego, CA$17,607
  • San Jose, CA$21,268
  • Seattle, WA$15,570

Local costs have been calculated by accounting for labor and material cost differences across different cities. To get accurate cost estimates, indicate yours: