Full Service leases, most common in Class A office projects, will typically include taxes, insurance, CAMS, management, utilities and janitorial all in one base rental rate.
For example, if you leased a 3,000 SF space with a $30 per SF full-service lease rate, the breakdown of payments would be: Full-Service Lease Rate: 3,000 SF x $30 per SF per year = $90,000 per year, or $7,500 per month. Included in the $7,500 per month amount is both the base lease rate and the operating expenses.
Ask the landlord what companies they're contracted with for utilities, ie do they use the city or a private company, what internet companies have lines to the building, ect. The easiest and cheapest thing to do is to ask them what's already hooked up and just use that.