The 7 mistakes that turn a website redesign into a legal and financial nightmare

Author: Boisdur-Salbris Matthieu

A redesign is not only about design. The real risk is breaking what already worked: SEO, high-performing pages, forms, legal compliance and the conversion journey.

1) Forgetting 301 redirects

If your old URLs disappear without redirects, Google and users land on 404 pages.

2) Not mapping backlinks

Inbound links matter. If the target pages change without a plan, you lose SEO value.

3) Removing pages that converted

Many teams delete old pages that were still generating qualified leads.

4) Ignoring legal compliance

Cookies, legal notices, terms and privacy policy: a redesign is the right time to bring everything up to date.

5) Breaking forms and analytics events

A redesign without tracking planning leaves you blind on real performance.

6) Hurting mobile performance

A nicer but slower site can reduce both SEO traffic and conversions.

7) Launching without a proper QA phase

Pre-production, a QA checklist and a rollback plan help avoid last-minute crises.

Conclusion: a successful redesign is a migration project, not just a visual refresh.