Roofing permit data records when a roofing permit was issued, not when a roof was replaced: a lead list dated from permits alone misses re-roofs done without a permit, re-roofs in places that need no permit or do not publish one, and it treats permits that were never built, partial repairs and overlays as new roofs.
Every roofer who has bought a “roofs over 20 years old” list knows the doorstep version of this page. The rep knocks on a house the file says has a 2004 roof, and the homeowner points at the ridge and says they replaced it four summers ago. That is not bad luck. It is the gap between a permit file and a roof, and it is predictable enough that you can ask a vendor about it before you pay and measure it in an afternoon after.
Disclosure: Scout Data is our product and sells roofing lists. Nothing below depends on whose list you buy; the questions work on ours too.
Five ways a permit date and a roof disagree
| What happened | What the permit file shows | What it costs at the door |
|---|---|---|
| Re-roofed without a permit | An old date, or nothing | A “we just did that” on a house sold to you as due |
| Re-roofed where no permit is needed | No roofing history at all | The same, across a whole jurisdiction |
| Permit pulled, job never done | A recent date | A worn roof suppressed as new — a lost lead |
| Repair filed under a roofing permit | A recent date | Most of the roof is still old, and suppressed |
| Overlay over the old roof | A correct date for a different job | The next sale is a two-layer tear-off, not a re-roof |
The first two make a list too optimistic: homes look due that are not. The last three make it too cautious: homes look done that are not. A vendor can be wrong in both directions in the same file.
The re-roof nobody permitted
A cash job on a weekend, a relative with a nail gun, a storm crew from out of state that never filed: wherever a permit is required, some share of re-roofs still skip it, and there is no reliable public count of how many. The permit file cannot see these jobs by definition, so a list that reads “no roofing permit since 2005” as “roof from 2005” will carry them as prime leads.
The re-roof that needed no permit
Sometimes the gap is the rule itself. As of October 2026, Seattle’s Department of Construction and Inspections states that “a permit is not required for re-roof work at one- and two-family homes and townhouses” when the work changes nothing in the building envelope other than insulation. In Texas, the Bexar County Fire Marshal’s office states the county “does not have legal authority to regulate residential construction” in its unincorporated areas unless an owner applies voluntarily (both pages read October 13, 2026). A roofing list built from permits is silent across places like these, and silence is easy to misread as an old roof. Add the departments that issue permits but offer no public online search, and the map of where permit dates are even possible is patchier than any vendor’s coverage slide.
The permit that was never built
A homeowner gets three bids, one contractor pulls the permit early, the homeowner signs with someone else or not at all. Section R105.5 of the International Residential Code, as printed in the 2025 California Residential Code effective January 1, 2026, makes a permit invalid if the work is not started within 180 days of issue; California’s own amendment stretches that to 12 months. Until it lapses, that permit looks exactly like a new roof in an issued-date file. The fix is the final inspection: a SAFEbuilt re-roof guide for homeowners under the 2018 code (published January 2020) tells the permit holder they “must call for a Final Roof inspection.” A permit that never reached final is a weaker fact than one that did.
The repair that looks like a re-roof
Repairs above a size threshold need a permit too. As of October 2026, the City of Cedar Key, Florida lists a permit as required for a full replacement and for “any roof work affecting more than 25% of a roof section within 12 months,” while replacing a few shingles needs none. A permit for a third of one slope can land in the same “roofing” bucket as a tear-off, and the rest of that roof keeps aging. Permit type fields are often free text, so the only way to know is to read the description.
The overlay
An overlay puts new shingles over old ones, and the code allows it with limits: under section R908.3.1.1 of the 2018 International Residential Code, as quoted in the same SAFEbuilt guide, a new covering may not go on without a tear-off where the existing roof “has two or more applications of any type of roof covering.” The permit date for an overlay is real, but the next job on that house is a full tear-off of two layers — a heavier scope and a different price conversation than the list implies.
Questions for any vendor selling “roof age from permits”
- Which jurisdictions does your permit history cover, and from what year in each? A national map hides cities that started publishing last year.
- Where there is no permit, what does the roof age column say? Blank is honest. A number derived from the build year is a guess labelled as a fact.
- Do you count a permit at issue or at final inspection? Ask to see the status field for ten rows.
- How do you tell a re-roof from a repair? Ask for the raw permit description behind ten dates and read them yourself.
- What happens in places where a re-roof needs no permit? If the answer is “we do not sell there,” fine. If it is “the roof is old,” walk away.
- Do you replace rows that turn out to be already re-roofed? A vendor that stands behind the date will say yes in writing.
The wider buying checklist — coverage, refresh speed and price units across permit sellers — is in building permit data providers.
Spot-check the list in one afternoon
No vendor answer replaces twenty addresses on the ground. Take the sample, pick rows from each age band the vendor sells, and route them so a rep can see them in a few hours.
- Look before you knock. A newer roof usually shows it: even colour across every slope, straight shingle lines, fresh ridge caps and drip edge, no patches of mismatched tabs. A roof that looks new on a row dated 2006 goes in the “already re-roofed” pile.
- Ask, do not tell. “When was the roof last done?” gets a better answer than “our records show 2006.” If the homeowner gives a year, write it down next to the vendor’s.
- Check a few against the county. Where the building department has a public permit search, look up the addresses whose answers surprised you and note whether the permit reached final.
- Sort into three piles. Matches the date; re-roofed since; repaired or overlaid. If “re-roofed since” is the biggest pile, you are holding a permit list, not a roof list.
Your own job history is a free answer key, too: every roof your crews replaced in the territory should be missing from a good list, or carry your date. The other direction — using recent permits to take finished roofs out of a campaign — is covered in lists of homes with new roofs, and the opener that asks a homeowner about the roof instead of asserting a date is in the roofing cold call script.
Where Scout Data fits
Scout Data builds lists of homes by roof age and roof condition in your territory, with homes that were already re-roofed taken out. Each home carries one live mobile, matched by name to the owner on title and DNC-scrubbed before delivery. Run the afternoon check above on it: ask for a free sample from the tens of thousands of roofs we have already read.
Frequently asked questions
Is roofing permit data accurate for roof age?
It is accurate about the permit, not about the roof. A permit records that someone applied to work on a roof on a date. It misses re-roofs done without a permit and re-roofs in places that need none, and it counts permits that were never built, partial repairs and overlays as if each were a new roof. Treat a permit date as one piece of evidence and check a sample of addresses before you buy a territory.
Do you need a permit to replace a roof on a house?
It depends on where the house is. As of October 2026, Seattle’s building department says a permit is not required for re-roof work on one- and two-family homes and townhouses that leaves the building envelope unchanged, while Cedar Key, Florida requires one for a full replacement and for any roof work over 25% of a roof section within 12 months. Bexar County, Texas says it has no legal authority to regulate residential construction in its unincorporated areas.
Can a roofing permit be for a repair instead of a new roof?
Yes. Many jurisdictions require a permit once a repair passes a size threshold — Cedar Key, Florida, for example, requires one for any roof work affecting more than 25% of a roof section within 12 months, as of October 2026. In a permit file that job can look like a re-roof. Ask a vendor to show the permit description behind each date, not only the permit type.
What should I ask a vendor who sells roof age from permits?
Five things: which jurisdictions the permit history covers and from what year; what the roof age column says where there is no permit; whether a permit counts when it was issued or only when it passed final inspection; how a re-roof is told apart from a repair; and whether rows that turn out already re-roofed are replaced. Then drive a handful of the addresses yourself.