It really depends on a case by case basis. Landlord's typically make this determination by 1) how much money they need to invest in your build out and 2) the tenant's creditworthiness. If minimal work is being done by the landlord and the tenant is an average credit risk, 1 to 2 months is a typical amount.
For larger financially strong companies, its typical for no security deposit to be charged.
With regard to rental increases, its really market driven. In strong rental markets, rents could be expected to increase well above inflation over the term. In softer markets, you could see rents flatter or closer to inflation adjusted increases.
Dec 30, 2012