The permit starting point
Dallas guidance describes a permit for most reroofing, with exceptions for minor work that does not affect structure or weatherproofing. Confirm how the city classifies the proposed work before relying on an exemption.
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Dallas covers an enormous range of housing, from pre-war bungalows in the older neighbourhoods to slab-on-grade brick built in the last twenty years. What they share is a permit path that treats most reroofing as work the city wants a record of, and a hail record that means many of these roofs are not on their first covering.
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What is different here
Three things that decide how a roof job goes in this city, and that are not the same one town over.
Dallas guidance describes a permit for most reroofing, with exceptions for minor work that does not affect structure or weatherproofing. Confirm how the city classifies the proposed work before relying on an exemption.
Dallas is not one kind of house. Pre-war frame and brick bungalows sit on small lots north and east of downtown, steep-pitched and often extended at the back. Post-war ranches fill the middle ring. Slab-on-grade brick two-storeys ring the outer edges. Roof age, pitch and complexity change by neighbourhood, sometimes by street.
Two failure modes, belonging to different halves of the city. In the older neighbourhoods it is layered coverings and rear additions where a shallower slope was tacked onto a steep one, so water slows exactly where two eras of workmanship meet. On the newer houses it is flashings and penetrations on roofs still well inside their expected life.
Reference gallery
The roof systems this page describes, on properties in a setting like this one.



Local context

Dallas sits inside the North Texas hail belt, and the county has a long record of hail and straight-line wind reports. That says something about the region and nothing about an address. A nearby observation establishes that an event was reported in the area; it does not establish that a specific roof was affected, which is what looking at the roof is for.
Confirm the jurisdiction that actually issues the permit — boundary addresses are commonly wrong about this — then the current permit and inspection path, any HOA or historic requirement, and how decking is handled if the deck turns out to need work.
Photographs of every plane with the date attached, a written note of anything that could not be safely reached, the permit and inspection record where one applies, and the product and colour actually installed. That file is what makes the next decision on this property cheaper.
In this city
Explore questions for the proposed work, then confirm the permit path and service availability for your address.
Nearby
Confirm the jurisdiction for your address and the requirements for the proposed work. City coverage does not confirm every service at every property.
Questions
In three ways. A second layer hides the deck, so nothing underneath has been looked at since the first roof went on. It adds weight the framing was not designed around. And tear-off on a layered roof takes longer and produces more waste, which belongs in the written scope before work starts rather than arriving as a variation on the day.
The city does, against the scope you actually describe to it. City materials say most reroofing projects need a permit and treat minor work as the exception, without setting out a proportion you could apply yourself from the driveway. That leaves the exemption as something to confirm for the specific scope rather than something a contractor can assert on your behalf. Ask before the work is agreed, and treat “this is only a repair” as a description that needs checking rather than a conclusion.
Yes, and in the older Dallas neighbourhoods it is usually where the trouble is. A rear addition frequently joined a shallower slope onto a steep one, and asphalt shingles have a minimum pitch below which the manufacturer does not permit them. The questions there are what the slope actually measures, what covering is on it now, and how the junction between the two roofs was built. Treat it as a second roof that happens to be attached to the first, and expect it to be priced that way.
Coverage is confirmed against your specific address before anything is scheduled, rather than assumed from a list of place names. Ask and you will get a straight answer either way.
Assessment request
Short, routing-only questions. Nothing here asks you to diagnose the roof yourself.