Does changing nameservers and a new site design affect SEO dramatically

[CompleteOffice]

We are about to change nameservers and upload a new website design design, completely rebuilt website to that new hosting, will this effect our seo efforts previously and have an effect on our SEO rankings?

[toddmumford]

Short answer - it can.

The best thing to do is audit the new website in a dev environment to be sure that the new website code is correct, error free, pages do not have duplicate or canonical issues, and all on-page factor have been copied over correctly.