Are "No Damages for Delay" Clauses valid in Washington? 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.Expiration and extension of construction permits. A schedule extension to allow the contractor to complete the specified work is not a new procurement and requires no new competition. Time extensions for interim completion. Begin your permit application under the permit type of Building Permit Extension. Contract time determination techniques generally fall into the categories of bar charts and critical path techniques. These techniques are described below. To qualify for an extension of time claim, this must be considered adverse weather. That is, the project is delayed 68 days in the early part of 2011.