Probably two years.
If the lawsuit will be based on a breach of a written contract it's 5 years, oral contract 3 years. See 8.01-246:
http://law.lis.virginia.gov/vacode/title8.01/chapter4/section8.01-246/
If it's not a contract issue and it's not specified under Article 3:
http://law.lis.virginia.gov/vacode/title8.01/chapter4/
Then it likely falls under 8.01-248 - two years:
http://law.lis.virginia.gov/vacode/title8.01/chapter4/section8.01-248/