How Much Does a Roof Replacement Cost in Louisville?
One national cost guide puts the average asphalt shingle roof replacement at $5,700 to $16,000. A second guide puts most projects at $7,500 to $14,000 for about 2,000 square feet of roof. A Kentucky cost page built on a national construction cost database sets the state average at $7,372.
Those are market numbers, not our price list. Your own number turns on the size and pitch of your roof. What the tear-off finds underneath moves it too. Our page on roof replacement in Louisville walks through how the work runs.
What does a new roof cost by roof size?
Roofers price a roof by the square. One square covers 100 square feet of roof surface. The roof is bigger than the floor plan, because it slopes and hangs past the walls.
Labor is a big share of the total, at 40 to 60 percent in one national guide. Another prices a one-story house with a 6:12 pitch this way.
| House size | Roof surface | Market range |
|---|---|---|
| 1,000 sq ft | 1,120 sq ft | $3,500 to $6,700 |
| 1,500 sq ft | 1,675 sq ft | $5,000 to $10,100 |
| 2,000 sq ft | 2,235 sq ft | $6,700 to $13,400 |
| 2,500 sq ft | 2,795 sq ft | $8,500 to $16,800 |
| 3,000 sq ft | 3,355 sq ft | $10,100 to $20,100 |
A two-story house carries less roof than a one-story house with the same floor space. The Kentucky page shows that pattern. It lists a 2,000 square foot two-story home at $8,878. Its figure for a 1,500 square foot one-story home is $8,707.
What drives the price of a roof replacement in Louisville?
Size sets the base. The line items below move the number from there.
| Line item | National guide figure |
|---|---|
| Tearing off old shingles | $1 to $3 per square foot |
| New decking | $2 to $5 per square foot installed |
| Drip edge | $1.50 to $3.00 per linear foot |
| A new roof vent | $200 to $700 |
| A permit, where one applies | $100 to $500 |
Pitch
Pitch is how steep the roof is. A 6:12 roof rises 6 inches for every 12 inches it runs. One national guide says pitches over 6:12 need extra safety steps and more labor. A steeper roof also carries more surface over the same floor, another guide notes.
Layers to tear off
Tear-off comes first on a full replacement. Several layers of old shingles cost more to strip and haul away, national guides say. A new build has no old roof to remove, so tear-off is not part of new construction roofing.
Kentucky’s residential code lists when a new roof cannot go over an old one. A roof with two or more layers is one case. A water-soaked or worn-out roof is another, and so is slate or tile. In each case the old roof comes off down to the deck.
Decking
Decking, also called sheathing, is the wood layer under the shingles. The Kentucky page notes that humid summers and severe weather are hard on it. Soft spots often show only once the old roof is off.
Ask how replacement decking is priced before work starts. A roof inspection before the quote can point to soft spots and extra layers early.
Material
The material you pick can triple the price, the Kentucky page shows. Here is how it and a national guide price the common options per square foot.
| Material | Kentucky page | National guide, installed |
|---|---|---|
| Asphalt shingles | $4.67 | $3 to $6 |
| Metal | $8.75 | $5 to $16 |
| Clay tile | $14.16 | $8 to $25 |
| Slate | $14.23 | $10 to $30 |
Within asphalt, the national guide lists 3-tab shingles at $3 to $5 per square foot installed. Architectural shingles run $4 to $6. The guide says they are thicker and last longer than 3-tab.
Louisville Metro’s sustainability office runs a cool roof rebate for Jefferson County properties. It pays $1 per square foot of rated cool roof, up to $2,000 for a home. Ask the office whether funds are open before you count on it.
Roof shape and access
Valleys, dormers, chimneys and skylights add flashing work and labor time, national guides say. Multiple stories raise the cost too. One guide also lists hard access among the things that add time to a roof replacement.
What the code asks for
Kentucky’s residential code requires a drip edge at the eaves and gables of a shingle roof. Look for it on the quote. The code also says flashing and vents must be replaced where they are rusted or damaged. Most installers include new flashing in the estimate, one national guide says.
Kentucky’s code designs every house for a 115 mph wind. Every bundle of asphalt shingles must carry a label showing its wind rating.
Do you need a permit to replace a roof in Louisville?
In Kentucky, permits for a single-family home are a local question. The state regulation that adopts the Kentucky Residential Code leaves them to local ordinance. The code’s standards apply either way.
Whether a roof replacement needs a permit depends on the work. Structural work, like new decking or rafters, is the usual reason to ask. Louisville Metro’s construction review office answers that question for Jefferson County, except Jeffersontown.
Jeffersontown runs its own Building Department. It says repairs may need a permit, and it asks homeowners to call before work starts. St. Matthews and Shively each add a city step before Metro issues a permit. In Bullitt and Oldham Counties, ask the county office or your city.
Should you repair or replace the roof?
One national guide suggests a repair when less than 25 percent of the roof is damaged. It adds two more tests. The repair should cost under 30 percent of a new roof. The roof should also be under 20 years old.
A roof that fails those tests points toward replacement. For the repair side of the math, read what a roof repair costs in Louisville.
How do you get a real number for your roof?
Published ranges set expectations, and your roof still needs its own number. Pitch, layer count, decking and material all move the final figure. We look at your roof and put the quote in writing before any work starts. Call or text (502) 817-7791, or read how a roof replacement runs with us.