State-average roof cost is a number people search for and then cannot use. Here it is anyway, with the caveat that matters more than the table: the spread inside most states is wider than the gap between states. A re-roof in downtown Austin and one two hours west are not the same price, and neither is "the Texas average".
What geography genuinely changes comes down to two things.
The two things that vary
Labour rate. This is most of it. Roofing labour tracks the local construction wage, which tracks cost of living. It is why the Northeast and the West Coast sit at the top and the South Central sits at the bottom, and it is why a metro area anywhere in the country prices above its own state average.
Code requirements. These vary by jurisdiction, not by state line, but they cluster geographically:
- Northern states require an ice barrier at the eaves — typically the first 24 inches inside the warm wall. That is a material and labour line the South does not have. See ice and water shield requirements.
- Florida and coastal Gulf enforce high-wind fastening — six nails per shingle instead of four, enhanced underlayment attachment, and in the HVHZ counties a permitted, inspected re-roof with specific product approvals. This is a genuine cost difference, not a regional habit.
- Hail country — Colorado, Nebraska, Kansas, north Texas, Oklahoma — has an insurance market so active that pricing there is partly set by claims rather than by homeowners.
What does not vary much is material. A bundle of architectural shingles costs roughly the same everywhere; freight to remote areas is a rounding error against labour.
Representative ranges
Installed, architectural asphalt, tear-off of one layer included, per square of roof:
| Band | Typical installed per square | Representative states |
|---|---|---|
| High | $600 – 950 | CA, WA, OR, NY, NJ, MA, CT, CO, HI, AK |
| Middle | $450 – 700 | IL, MI, OH, PA, VA, MN, WI, NV, AZ, GA, NC, FL |
| Lower | $350 – 575 | TX, OK, AR, MS, AL, TN, KY, MO, KS, WV, IN, SC |
Typical US contractor pricing at the time of writing, not quotes, and not a substitute for three local bids. Florida sits in the middle band despite low labour costs because the wind code adds back what the wage saves.
Why the state number misleads
Three reasons, and all three are bigger than the state effect:
Your roof is not average. Pitch, shape, storeys and layers move a job further than geography does. A steep cut-up hip in a cheap state can cost more than a simple gable in an expensive one. See roof replacement cost per square.
Metro versus rural. Within a single state this gap routinely runs 25–40%. A state average is the midpoint of a distribution most homeowners do not live at.
Averages include everything. Published state averages mix cedar, tile, metal and asphalt, and mix repairs with full replacements. Some are built from lead-generation data, which skews toward whoever pays for leads.
If you want a number you can act on, convert your house to squares — see how many squares is my roof — take the band above as a sanity check, and get three local quotes. The band tells you whether a quote is plausible. It does not tell you what your roof costs.
Where geography is worth paying attention to
Two cases where the regional line is not noise:
Insurance-driven markets. In hail states, a large share of re-roofs are paid by claims. That changes the negotiation entirely: the number that matters is the carrier's scope, not the contractor's list price, and a contractor who works claims daily is worth more than one who is cheapest.
High-wind zones. In coastal Florida and similar jurisdictions, a re-roof triggers a permit and an inspection, and the products have to carry the right approvals. A quote that is well under the local band is often a quote that skips that, which is a problem at sale time and a bigger one at claim time.
The short version
Use the band as a plausibility check, not a budget. Labour rate explains most of the difference between states, code explains the rest, and neither explains as much as your own roof's pitch, shape and number of existing layers.