The project owner has no responsibility for an inexcusable delay. A schedule extension to allow the contractor to complete the specified work is not a new procurement and requires no new competition.This request is more formal than the notice of delay, and the actual procedure to request a time extension should be outlined in the contract. Time extensions for interim completion. Building permits expire two (2) years from the date of permit issuance. Once a permit is expired, inspections can not be scheduled. Contract time determination techniques generally fall into the categories of bar charts and critical path techniques. These techniques are described below. The Building Official is authorized to grant, in writing, extension of time, for a period of one (1) additional year.