Unfortunatly probably not. The permit costs and the method of calculation will vary from location to location. Some areas charge a percentage of the job as a the permit fee where others charge a flat rate while still others charge a flat fee per $1,000 of project cost. If you happen to be researching permit/project costs in an area that charges a percentage then you’re in luck. Otherwise you won’t have much luck. The other thing to keep in mind is that many municipalities request the project cost as part of the permit application process and sometimes this information is publicly available. In those cases no calculation is necessary, just a little research and heavy lifting.
There is no formula to base a permit cost against a job cost, except that it is well below reality. The permit cost, except for new construction, is typically well below the true cost.
Yes, divide the permit value by 1.15 and then by 1.33. The actual job cost should usually fall in between these two numbers.
Each City have a different way to calculate their fees we are walking over 90 cities radius and we see that each City collect their fees differently some of them are more expensive some of them are the same for the same work and also don’t forget did the person who actually pull the permit give an estimated cost for the project so that can affect the cost of the permit some cities does not care what the contactor writing on the cost section and they evaluate by them self so unfortunately the answer to your question is not there is too many variables