Roofing costs depend on your project and location. Check with a local pro for your specific job.
Denver homeowners can expect to pay between $8 and $12 per square foot for flat roof replacement.
TPO roofing costs $5 to $10 per square foot and protects against high-altitude UV exposure.
Roofers in Denver charge $1.80 to $3.50 per square foot.
Replacing a flat roof in Denver offers a return on investment (ROI) of 50% to 70%.
As a major metropolitan city, Denver, Colorado, homeowners often see higher flat roof replacement costs than those in smaller surrounding communities. The cost to replace a flat roof in Denver averages $5,771, with prices ranging from $3,457 to $9,434. The top factors affecting roofing costs include roof size and material, application method, and local labor rates. With heavy snow and intense UV exposure, many homeowners need to budget for high-end materials and added protection to guard against weather-related wear.
The cost to replace a flat roof in Denver, CO, depends on several factors, including its size, design, and materials. You’ll also need to consider the application method, demolition and prep, and inspection costs.
Calculating the size of your roof can help you estimate the cost of a replacement. For a rough approximation, measure the length of your house's exterior, then multiply it by the width to get the size of your flat roof. Consider adding a small percentage to account for any overhangs.
Here are estimated costs by roof size—but keep in mind that the type of roof you plan on replacing, as well as the material, greatly affect your flat roof replacement cost:
| Roof Size (Sq. Ft.) | Average Cost |
|---|---|
| 1,000 | $8,000–$12,000 |
| 1,500 | $12,000–$18,000 |
| 2,000 | $16,000–$24,000 |
| 2,500 | $20,000–$30,000 |
| 3,000 | $24,000–$36,000 |
Like traditional sloped roofs, flat roofs offer a multitude of material options. Each has its own cost estimate, advantages, and disadvantages. Many roofing materials look similar, so discuss options with your pro.
Here’s a breakdown of estimated flat roof replacement costs based on material:
| Roof Material | Average Cost per Sq. Ft. | Features |
|---|---|---|
| Fiberglass | $6–$9 | Lasts 25-30 years; not durable |
| Rubber | $6–$10 | Resistant to warm weather and UV rays |
| Thermoplastic polyolefin (TPO) | $4–$7 | Good at handling water pools; single-ply system |
| EPDM | $12–$20 | Made from oil and natural gas byproducts; 10–25-year lifespan |
| Built-up tar | $8–$12 | Fire-resistant; low-maintenance; lasts 30 years |
| Glass-reinforced polyester (GRP) | $6–$10 | Weather-resistant; needs very dry installation; lasts 30 years |
| Modified bitumen | $5–$7 | Fully recyclable; low water-resistance; 10-20-year lifespan |
There are several types of flat roofs, including cold roofs, warm roofs, and green roofs. The type of flat roof will influence the price you pay for a replacement.
Here’s how much flat roof replacement might cost based on roof type:
| Flat Roof Type | Average Cost per Sq. Ft. | Features |
|---|---|---|
| Cold | $5–$10 | Insulation is below the roof deck, typically inside the joists or rafters; a ventilation gap is placed above the insulation; more susceptible to condensation |
| Warm | $7–$13 | Insulation is located on top of the roof deck, above the vapor barrier and below the waterproof membrane; energy-efficient; good moisture control; straightforward installation |
| Inverted | $8–$14 | A type of warm roof with reversed layers, shielding the waterproof membrane from the elements |
| Hybrid | $9–$15 | Insulation is split above and below the roof deck; increased risk of condensation; often used when a full warm roof is not possible |
| Curved | $12–$20 | Low-slope roof that has a gentle curve; has flat roof features but a sloped aesthetic; the slope improves drainage |
| Tapered | $9–$16 | Flat roof with a gentle slope created with tapered insulation boards; the design ensures proper drainage and prevents standing water |
| Green | $5–$50 | Partially or completely covered with vegetation; has layers like a root barrier and drainage system; environmental and economic benefits |
The most common application methods for flat roofs are ballasted, fastened, and fully adhered. Here’s how the flat roof application type might influence your cost:
Ballasted roofs: $1.75 to $2.50 per square foot
Fastened attachment method: $2.25 to $3.50 per square foot
Fully adhered method: $3.25 to $4.50 per square foot
Demolition and Prep
Your roofing pro might charge extra for removing the existing roof. This costs about $1.50 to $6 per square foot, or an average of $1,200 to $2,500 total. Prep involves removing debris, mold, or algae and repairing any damage.
Denver roofs face high-altitude UV exposure, heavy Front Range snowfall, and frequent hailstorms that can make replacement more complex and increase labor costs. When budgeting for flat roof replacement, you’ll need to take Denver roofer fees, permits, warranties, and additional pro costs into consideration.
Roofers charge $1.80 to $3.50 per square foot for labor, and a flat roof replacement takes about five days, depending on the size and complexity of the job. Some roofing materials, such as built-up tar, are more time-consuming to install, which will affect the overall labor cost. If you’re quoted a fee based on the total project cost, expect a markup of 20% to 30% of the job.
Depending on where you live, you may need to pay for a building permit to replace your roof. These permits cost between $150 and $400, with higher fees for roofs larger than 1,000 square feet.
It’s a good idea to hire a roofing professional to conduct a final inspection after the roof has been replaced. This will ensure that the contractor did quality work. Expect to pay between $150 and $500 for this inspection.
New roofs should include manufacturer warranties that cover the materials and various parts of a flat roof. If you’re comparing similar materials, prioritize the option with the longest and most comprehensive warranty. You can also check online reviews or ask the contractor for clarification.
Depending on the complexity of your roofing project, you may need additional pros. Budget for the following specialists, depending on your project scope:
General contractor: Larger projects or complete building renovations may require a general contractor to coordinate trades and permitting, adding 10% to 20% to the project cost.
Structural engineer: Replacing a ballasted roof, inverted roof, green roof, or any project where snow load is a concern may require the services of a structural engineer, with costs ranging from $500 to $2,000.
Replacing a flat roof in Denver offers a significant return on investment (ROI), with most homeowners recouping 50% to 70% of the total project cost. New roofs offer enhanced safety, fewer inspection issues, and better appraisal results that appeal to buyers and increase overall home value. Modern flat roofing systems with ENERGY STAR ratings can also reduce heating and cooling costs, offering an attractive selling point for Denver’s 300 sunny days a year and freezing winter temperatures.
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
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Colorado Roofing & Energy did an amazing job on my roof, they handled insurance and got things done as scheduled. I would highly recommend to friends and family.
Colorado Roofing & Energy LLCwith this roofing company! Their communication was excellent and the crew worked quickly and efficiently. The roof looks amazing and the whole process was smooth. Thank you for the great service!
Alta Roofing, Inc.I put off getting my roof fixed for way too long, but after the third time I had to put buckets out during a rainstorm, I finally called Level Up Roofing LLC. Best decision ever. The estimator actually got up on my roof instead of just eyeballing it from the ground like some other roofing...
Level Up Roofing LLCI would highly recommend Smoky Hill Roofing. Sam came out and looked at the job and said that a new roof was not needed at this time. I appreciate his honesty.
Smoky Hill RoofingFantastic, roof was quickly and professionally repaired.
Mile High Roof RepairAn amazing roofing company to work with that has great services and helped me through step by step with everything until my roof was done. The whole process of getting the roof done went flawlessly and was done quick. Highly recommend getting your roof done with this company!
From the first point of contact, I was confident that Integrity Roofing was the best choice for my current roofing needs. Itâ s been difficult to find a company as thorough and good at communicating here in Denver. Upon completion of the project, I can say I am 100% satisfied. I highly...
Integrity RoofingHighly recommend Ronnie Smith for any roofing job, He was quick to inspect my roof & determined my roof jacks were the problem not the entire roof.
U.B. Code Roofing ConsultantsThey were very professional and efficient. They completed the roof on our Bailey home in one day and you would never know anyone had been there except that we now have a beautiful new roof. I would very highly recommend Five Sons Roofing if you are looking for a roofing contractor.
Greg and Brandon were amazing. They recognized the urgency of the situating given incoming sever weather coming the following day. They managed to complete all the work in a few hours. I high recommend Masters Touch Roof for all roofing issues!
Andrew CloughFrom average costs to expert advice, get all the answers you need to get your job done.
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