Roof Replacement Cost: Average Prices by Size and Material
You are probably staring at a quote or a leaky ceiling and wondering what a fair number looks like. Roof replacement cost swings widely, and a rough guess can leave you short by thousands of dollars. Size, material, roof pitch, and your location all move the final price.
Here is the short answer. Most U.S. homeowners pay roughly $9,000 to $30,000 for a full replacement, and the average lands near $12,000 to $15,000 for a typical asphalt shingle roof. Metal, slate, and tile cost far more. In the Seattle area, steep roofs, tear-off labor, and wet-weather scheduling often push prices toward the upper end of that range.
Below, we break down average prices by roof size and cost per square by material, then show what else changes the total, like decking repairs, permits, and skylights. We are a roofing contractor in Kirkland, so we also point out what we see on Eastside homes. You will leave with a realistic budget and the right questions to ask before you sign anything.
Why roof replacement cost matters for your budget
The roof is a big, unplanned expense
Few home projects hit harder than a roof. The cost of a new roof on a house usually ranks among the largest bills you will pay for your exterior, and it rarely arrives on a schedule. A storm, a leak, or an inspection report forces the decision, so you often have weeks, not years, to prepare.
Knowing the roof replacement cost average for your size and material gives you a baseline. Without one, you cannot tell a fair bid from a bid that leaves out tear-off, underlayment, or flashing. Those omissions are how a quote that looks $4,000 cheaper ends up costing more.
What happens when you budget too low
Underestimating pushes homeowners into bad trade-offs, and we see the same patterns on Eastside jobs. Most of them come down to a lack of a realistic number before the work starts:
Choosing the lowest bid, then paying change orders when rotted decking shows up.
Layering new shingles over old ones, which hides damage underneath and can shorten the new roof's life.
Putting the work off until a small leak becomes wet insulation, stained drywall, or mold.
Taking a rushed loan at a poor rate because nothing was set aside.
Why timing matters in Western Washington
Rain makes delay expensive here. Water that gets past worn shingles soaks the plywood decking and insulation first, and you pay to replace both on top of the roof itself. Moss and standing moisture speed up that damage on shaded north-facing slopes, so a roof that looked fine in July can fail by February.
A roof budget set before the leak starts is always cheaper than one set after.
That is also why we give locked-in price quotes at Legacy Exteriors. Once you approve a number, the price stays the same, so your budget holds from the first day of tear-off to the final cleanup. You should ask every contractor you talk to whether their quote is fixed or an estimate, because the difference decides how much cushion you need to keep in reserve.
How to estimate your roof replacement cost
Measure your roof in squares
Roofers price work by the square, which equals 100 square feet of roof surface. To calculate roof replacement cost, start with your home's footprint, multiply by a pitch factor for the slope, then add 10% for waste at hips, valleys, and edges. A steeper roof has more surface area than the footprint suggests.
Roof pitch | Multiplier |
|---|---|
4/12 | 1.06 |
6/12 | 1.12 |
8/12 | 1.20 |
10/12 | 1.30 |
12/12 | 1.41 |
Take a home with an 1,800 square foot footprint and a 6/12 pitch. Multiply 1,800 by 1.12 to get 2,016 square feet. Add 10% and you land near 2,218, or about 22 squares. Compare that to the wording on your bid, because the squares should match within a square or two.
Turn squares into dollars
Next, multiply your squares by the installed price per square. For architectural asphalt shingles with tear-off, a reasonable range is $550 to $700 per square. Our 22-square example works out to $12,100 to $15,400, which is how the typical roof replacement cost average takes shape.
Squares times price per square gives you a ballpark, not a bid.
Finally, build in a cushion. Set aside 10% to 20% extra for rotted decking, flashing, vents, and permits, since nobody can see the plywood until the old roofing comes off. Satellite measurements get you close, but only an on-site inspection can confirm the condition of the decking and give you a number you can rely on.
Average roof replacement cost by roof size
Asphalt shingle prices by roof area
Size is the biggest single input, so start here. The table applies the $550 to $700 per square range from the last step to common roof sizes. It assumes architectural asphalt shingles and a full tear-off.
Roof surface area | Squares | Estimated cost |
|---|---|---|
1,500 sq ft | 15 | $8,250 to $10,500 |
2,000 sq ft | 20 | $11,000 to $14,000 |
2,500 sq ft | 25 | $13,750 to $17,500 |
3,000 sq ft | 30 | $16,500 to $21,000 |
4,000 sq ft | 40 | $22,000 to $28,000 |
Find the row closest to your own square count. Most single-family homes fall between 20 and 30 squares, so $11,000 to $21,000 covers the cost of a new roof on a house for many owners before upgrades or repairs.
Why the price per square shifts with size
Small roofs often cost more per square than the table suggests. The dumpster, permit, delivery, and crew setup are fixed costs, and a 12-square roof spreads them over very few squares. Expect a small job to price at the top of the range or slightly above it.
Complexity matters as much as raw area. Dormers, valleys, chimneys, and steep slopes each add labor, and a cut-up roof takes longer than a plain one. A simple 30-square gable can easily cost less than a 24-square roof with five valleys and a steep pitch.
Roof size sets your baseline, but roof complexity decides how far above it you land.
So treat the table as a starting point. Ask your contractor to list the squares, the pitch, and any extra details they priced, so you can see exactly where the number came from.
Average cost by roofing material
Installed price per square by material
Material is the second big lever after size. The table shows installed prices per square with tear-off, plus what each option costs on the 22-square roof from our earlier example. Your roof replacement cost climbs fast once you leave asphalt.
Material | Price per square | 22-square roof | Typical lifespan |
|---|---|---|---|
Architectural asphalt | $550 to $700 | $12,100 to $15,400 | 20 to 30 years |
Cedar shake | $800 to $1,400 | $17,600 to $30,800 | 20 to 30 years |
Concrete tile | $900 to $1,500 | $19,800 to $33,000 | 40 to 50 years |
Standing seam metal | $1,000 to $1,800 | $22,000 to $39,600 | 40 to 70 years |
Natural slate | $1,500 to $3,000 | $33,000 to $66,000 | 75 to 100 years |
Cost per year beats sticker price
Asphalt wins on upfront price, which is why the roof replacement cost average stays near $12,000 to $15,000. Over time the gap narrows. A $14,000 asphalt roof that lasts 25 years costs about $560 a year, while a $30,000 metal roof that lasts 50 years costs about $600 a year.
The cheapest roof to install is rarely the cheapest roof to own.
Your plans should decide the choice. If you expect to sell within seven years, architectural shingles usually return the most for the money. If this is your long-term home, metal or tile deserves a serious look, and moss resistance on shaded Eastside lots makes metal even more appealing.
What drives costs up or down in the Seattle area
National averages only go so far. A handful of local factors decide whether your roof replacement cost lands at the low or high end of the ranges above, and most come from our wet climate and older housing stock.
What pushes the price up
Eastside homes often have steep, cut-up rooflines, and constant dampness takes a toll on what sits underneath. Expect higher labor on steep pitches and a real chance of decking repairs. Common add-ons include:
Rotted plywood or old plank sheathing on shaded slopes
Permit fees, which differ in Kirkland, Bellevue, Redmond, and Seattle
Second layers of old roofing that need extra tear-off and disposal
Flashing work around skylights, chimneys, and dormers
Older homes carry the biggest surprises. Houses built before the 1980s often have spaced plank sheathing under the old cedar or shingles, and many need new solid decking before modern roofing can go on.
In this climate, the roof you can see matters less than the decking you cannot.
What helps keep it down
Timing and planning save real money. Book in spring or early fall, when crews have openings, instead of fighting the July rush. Keep rooflines simple where you can, and bundle gutters or siding with the roof so the crew sets up once.
Compare bids line by line. The cost of a new roof on a house only means something when every bid includes the same tear-off, underlayment, and flashing, so ask each contractor to spell out the scope in writing.
Planning your new roof budget
Your roof replacement cost comes down to four things: size, material, roof complexity, and the condition of the decking once the old roofing comes off. Start with your squares, multiply by the price for your material, and add a 10% to 20% cushion for surprises. Decide early whether you are selling soon or staying long term, since that points you toward shingles or metal.
Treat every number you collect as a range until someone has been on your roof. Line-by-line bids with the same scope let you compare contractors fairly, and a fixed quote keeps the final bill from drifting.
Finally, the fastest way to turn a ballpark into a real figure is an on-site inspection. Legacy Exteriors offers a free roof inspection in Kirkland, Bellevue, Redmond, and Bothell, and every quote we give is locked in, so the price you approve is the price you pay.
