Other utility charges
Line extension charges, meter deposits, transformer costs and aid-in-construction payments.
Electric, gas, reclaimed water and fiber providers
Line extensions are quoted as a contract, not a fee schedule, and are the item most likely to arrive late and unbudgeted.
Electric and gas line extensions are contracts, not schedules. Request the quote as early as you have a site plan, because the lead time is longer than the permit process in many markets.
Aid-in-construction payments to a utility may be partially refundable as additional customers connect to the extension you paid for. Ask whether a refund contract exists and what triggers it.
Transformer, service drop and meter base costs are frequently split between utility and owner in ways that are not obvious from the tariff. Get the split in writing.