Washington A C D F G H I K L M N O P R S T U V W Washington Construction Litigation Hold R.C.W.A. § 4.16.310; R.C.W.A. § 4.16.300Substantial completion of construction on improvement to real property.Online ReferenceNational Society of Professional Engineers Home Online Reference State Statute for Construction: 5 Years*The National Society of Professional Engineers Recommends an Additional: 3 YearsRecommended Document Retention 8 Years If you would like to learn the statute of limitations of any warranty your state entitles you to, refer to our Warranties map.