Website redesign: how to migrate without losing your SEO

When is a website redesign actually necessary?

A redesign becomes necessary when your site shows at least one of these four warning signs: a dated design that undermines your credibility, slow loading that drives visitors away, non-compliance with legal requirements, or invisibility in AI-generated answers. On speed, Google measures three indicators, the Core Web Vitals (LCP, INP, CLS), which you can test for free with PageSpeed Insights. On compliance, the European Accessibility Act has applied to e-commerce and digital services since 28 June 2025. And Google's AI Overviews have been live in France since 2025: a site that AI engines cannot cite is losing customers without ever knowing it.

Why does a botched redesign make traffic collapse?

A botched redesign makes traffic collapse because Google loses every reference point at once. Three mistakes cause most of the damage. First, URLs change without 301 redirects: every old address returns a 404 error, and the ranking it had earned vanishes with it. Second, content that was generating visits gets deleted just because it looked old: the pages that ranked go in the bin along with their traffic. Third, tags get lost in the migration: titles, meta descriptions and structured data are overwritten by the new theme's defaults. The classic scenario: traffic cut in half overnight, then 3 to 6 months of SEO work to rebuild what you already had.

What is the 8-point migration checklist?

A safe migration rests on eight checks, spread across before, during and after the switch.

Step 2 is vital: each 301 redirect must lead to the equivalent page, never in bulk to the homepage, or every URL loses the relevance it had built up.

When should you add the GEO layer to your site?

The best moment to add GEO is during the redesign itself: bolting AI standards on afterwards means reopening the whole project a few months later. While the site is being rebuilt, everything is already open: it is the perfect time to bake in structured data, a machine-readable architecture and answer-format content, the kind that ChatGPT, Perplexity and AI Overviews readily quote. First GEO results show up within 4 to 12 weeks, versus 3 to 6 months for classic SEO. Neting's AI-Ready Audit at 690 € combines an SEO and GEO audit, baseline fixes and a 6-month action plan: full details on our SEO and GEO page.

How long does a well-run redesign take?

The build itself can be very fast: at Neting, an Essential site goes live 5 days after the specs are approved. The real time factor is preparation: framing the specs, running the page inventory, building the redirect plan and deciding which content stays. That phase is what protects your rankings, not the length of the technical build. A rushed redesign that skips preparation always costs more than the few days it claims to save.

How much does a website redesign cost?

On the market, a redesign runs between 1,500 and 6,000 € with an agency and between 1,500 and 5,000 € with a freelancer. Neting offers a more accessible route: the Essential plan at 490 € (one-page or 3 pages, local SEO included) and the Business plan at 990 € (up to 8 pages, booking and payment gateway included), with hosting from 29 €/month, maintenance included. Plans are detailed on our web design page, and our 2026 website pricing guide compares every market bracket.

How do you start your redesign without taking risks?

Start with the inventory: export the list of your most visited pages and their rankings before touching anything. Then require a written 301 redirect plan from your provider and a full staging test before the switch. Finally, keep an eye on Search Console for 3 months. If you would rather hand the whole thing over, Neting applies this checklist on every project: free quote, reply within 24h through the website form.