How much does a commercial roof cost?

Purchasing or investing in a new commercial roofing system is a pretty big investment. There are two reasons you are here to know how much does a commercial roof cost? Maybe: 

  1. You purchased a new building that requires roofing
  2. Your old roof is leaking

Different roofing companies can suggest many things. The quality of your commercial depends on how you are allocating the investment. That is why before jumping on to any conclusion, you need to measure an approximate cost. That is why you need to get familiar with the terms and factors that affect how much does commercial roof costs.


How much does a commercial roof cost?

Well, there is no specific formula that will calculate the exact quote of your commercial roofing. We also get lots of questions about our San Jose commercial roofing system and costs. Depending on the type of roofing, it might cost $2.5 to $25 per square foot. Different factors will determine what you pay between the highest and lowest pricing.

Five key factors that affect how much does a commercial roof cost

1. Type of Roof

First of all, the type of roof you choose will impact the quote. As different roofs require different materials, they will cost differently. Plus, the building process also varies for different roofs.

Three most common roofing types:

  • Flat roofs: flats roofs are the cheapest solution for your commercial roofing. For this type, you need fewer materials as less area is covered. Usually, these are made of bituminous materials.
  • Low Sloped roofs: they are slightly pricier than flat roofs. Although they require almost the same material types as flat roofs, these roofs take more area to be covered.
  • Pitched roofs: this one cost more than the two discussed above. Mostly they are made of ceramic roof tiles, slates, and reed materials.

2. Access to Roof

The accessibility is a crucial factor to determine roofing cost. It shows how spontaneously workers can perform.

  • Height or Distance: It’s likely a 30 storied-building will cost more than a three-storied building. Because the extra height requires cranes to lift materials. Similarly, for a large roofing project, the logistics might need to store large amounts of material. Narrow and small areas or the open area far from the building make them uncomfortable. It will likely increase the cost.
  • Occupancy: An occupied building creates additional challenges for the roofing project. They have to be concerned about the safety and convenience of occupants. If the manufacturing works have to take place beyond regular working hours, there will be extra charges for that. Lastly, the ease of getting equipment within the property and the building will also affect the quote. If the roof construction hampers regular business hours, then the adjusted work hours will involve extra costs.
  • Roof style: Flat roofs and sloped/pitched roofs are the most common roof types. Sloped and pitched roofs are quite risky to stand on. They will require a lift for that. Flat roofs are more convenient on this issue.

3. The Size of Your Roof

For small to medium-sized buildings, the price starts to rise per square foot. Anyway, if the roof exceeds 20,000 square feet, additional fees won’t be charged for the extra feet.

4. Local Code Requirements

There are some local or state code requirements that differ in different regions. The specific standards set to build roofs will impact on the cost of roofing.

These codes can mandate your use of fasteners in locations with extreme weather conditions. They can limit your material options if your area requires a specific slope or aesthetic to your building.

5. Warranty

When the roofing installment is completed, it’s time to pick the warranty option. Consider a cost-effective roof warranty type that assures that your roof sustains significant damage.


There are three standard warranty options that you can choose.

  • Contractor’s Workmanship Warranty –this refers to a short-term warranty that the contractor provides. It can be from one to five years, although they cover both instances of defective manufacture as well as defective materials. Usually, contractors offer it free, but some can charge up to $1000 for it.
  • Manufacturer’s Material Warranty – It costs low and provides low coverage. However, this is a more extensive warranty than contractors one. It usually ranges from 20 to 40 years. Anyway, this warranty works for roofing materials only.
  • Manufacturer’s System Warranty – it costs higher than the other two, from $0.10 – $0.20 per Square Foot. This warranty covers defects in both materials and labor. Besides, it offers maximum limits for manufacturer responsibilities.

Some other factors that also impact on the quote


Finishing the roof installation does not take away all the responsibilities. You have to establish a maintenance process for sustainability. You have the option to sign a roof maintenance contract or restore the system regularly. There will be an additional cost for sure, but the right care will ensure the longevity of your roof and prevent replacing more often.

Required Fasteners

Your roof system will need a specific type of fasteners. It depends on the region of the building, weather, and of course, the local codes. For example, an area with fast wind speed needs more powerful fasteners at more frequent intervals than the ones at a slower pace.

Current Roof Condition

The current condition of your roof can impact the pricing. Like if the state of the roof is too weak with damages, it will take more time and effort to remove the debris. Then this can increase the quote. More loss requires more work, which leads to more labor and material costs.

Transportation of Materials

The material transport costs also have a significant impact. Depending on the amount and type, the cost can be from 2-5% of the total project costs.

Final Verdict:

In this article, we tried to help you choose the right roof solution. We decided to provide an estimated idea of how much does a commercial roof cost so that you build up an adequate budget.

There are so many factors that can affect roof pricing, but we tried to cover the most significant ones. These will help you decide without getting mesmerized. Feel free to contact our San Jose roofing company to get more information.


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