ASP MVC Code First Table Creation

I have a table in my EF model that is not creating within the database on access.

The table name is "sites" and is linked to a parent table by the use of a foreign key called "CompanyId".

I am attmempting to list all the sites that belong to a specific company (the company table is linked to the ApplicationUser)

I would expect that when i call the database for a list of the sites that it will be created. However i just receive an error that states the table does not exist

My model for the two tables is as follow

public class Company
{
    [Key]
    public int CompanyId { get; set; }
    public string CompanyName { get; set; }
    public string Address1 { get; set; }
    public string Address2 { get; set; }
    public string Address3 { get; set; }
    public string PostCode { get; set; }
    public string County { get; set; }
    public string Country { get; set; }
    public string TelephoneNumber { get; set; }
    public string Email { get; set; }

    public virtual IQueryable<Site> Sites { get; set; }


}



public class Site
{
    [Key]
    public int SiteId { get; set; }
    public int CompanyId { get; set; }
    public string SiteName { get; set; }
    public string Url { get; set; }


}

and my controller

    public ActionResult Index()
    {

        //get the user details
        var manager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(new ApplicationDbContext()));
        var currentuser = manager.FindById(User.Identity.GetUserId());

        // search 
        var company = currentuser.Companies;
        var sites = company.Sites;

        if (sites == null)
        {

           sites = db.Sites.Where(c => c.CompanyId == company.CompanyId);



            return View(sites.ToList());
        }

        return View(company.Sites.ToList());
    }