For plumbing LSA, a good booking rate is usually between 55% to 70%, and that's booked jobs divided by the charged leads you actually answered.
If you're below 40%, you have got a real issue either you are missing calls, your service area is too wide and you are getting price shoppers, or your front desk is not converting. Most average plumbing shops sit around 40% to 55%.
If you are hitting 55% to 70%, you're doing well and your categories and call handling are tight, and anything over 70% is excellent and usually means you're specialized in high-intent stuff like emergency leaks and water heaters with live answering. It also depends on the job, emergency leaks should book at 60 to 75%, no hot water calls at 55 to 70%, while dripping faucets will always be lower at 30 to 45%.