To know when to redesign your website, watch 4 critical signals: a PageSpeed score below 60/100, a bounce rate above 70%, competitors with visibly more modern sites, and a site that is hard to update. If 2 of those 4 signals are present, the redesign is urgent: every month lost is traffic and leads handed to your competitors.
At ConvertiLab we have rebuilt more than 40 sites in 2025-2026. In 85% of cases the clients had waited one to two years too long before deciding, and their organic traffic had fallen by an average of 35% over that period.
What are the concrete signs that it is time to redesign your website?
The 7 concrete signs that it is time to redesign your website are: slow loading (over 3 seconds), a dated design that is not responsive, a bounce rate above 70%, organic traffic falling over 6 months, conversions dropping despite stable traffic, a site that is hard to edit, and competitors with visibly better performing sites. One of those signals deserves attention; two or more call for action.
| Signal | Alert threshold | Impact |
|---|---|---|
| Load time | over 3 seconds | -7% conversion per extra second |
| Mobile PageSpeed score | under 60/100 | Google Core Web Vitals penalty |
| Bounce rate | over 70% | Visitors leaving without converting |
| Organic traffic | -15% over 6 months | Lost Google rankings |
| Conversions | -20% over 3 months | Leads going to competitors |
| Age of the site | over 4 years without a redesign | Obsolete technology and design |
How do you plan a website redesign without losing your search rankings?
To plan a website redesign without losing your search rankings, follow 4 steps in order: audit the existing site (identify the pages that bring in traffic), set measurable objectives, prepare a 301 redirect plan for every existing URL, and test the new site for 2 weeks before opening it to the public. The most common mistake is going live without the redirect plan.
Step 1, audit the existing site: before rebuilding everything, work out what is already working. Use the free SEO audit to list your best ranking pages and the keywords you hold. Those pages must be kept and redirected to their equivalents on the new site.
Step 2, set the objectives: a redesign with no measurable target is bound to disappoint. Examples: "take the mobile PageSpeed score from 45 to 85", "double form submissions", "cut the bounce rate from 75% to 55%".
Step 3, 301 redirects: every URL on the old site must point to its equivalent on the new one. Without that, Google sees a 404 (page not found) on all of your pages, and you lose your entire ranking overnight.
Step 4, testing before launch: test on mobile, on desktop, in Safari and in Chrome. Check every form, every internal link, the images and the load times.
Which fatal mistakes ruin a website redesign?
There are 5 fatal mistakes that ruin a website redesign: forgetting the 301 redirects (the number one cause of traffic collapse), deleting content that was generating traffic, changing every URL for no reason, skimping on mobile testing, and launching the new site without checking Google indexing in Search Console. Those 5 mistakes account for 90% of the cases where a redesign ends in lost traffic.
Can you redesign your site gradually rather than all at once?
Yes, a phased redesign is a smart alternative to a full rebuild, especially for small businesses on a limited budget. It means modernising the site in stages: performance first (speed, images), then design (mobile first, UX), then technology (moving to a modern framework), then conversion (CTAs, forms). This approach reduces risk and lets you measure the impact of each improvement.
A ConvertiLab client case: a physiotherapy practice in Toulouse had a WordPress site from 2018 with a PageSpeed score of 28/100. Rather than a full redesign straight away, we started by converting the images to WebP, enabling caching and removing 12 unnecessary plugins. PageSpeed score after 2 days: 72/100. A month later, organic traffic was up 22%. The visual redesign came afterwards, consolidating the gains.
The 4 phases of a gradual redesign:
Frequently asked questions about website redesigns
How much does a website redesign cost in 2026?
At ConvertiLab, a complete redesign of a business website costs between 990€ and 1 490€, depending on the number of pages and features. An e-commerce site or a more complex project starts at 2 490€. That budget covers the audit of the existing site, the redirect plan, the new design, the build and the launch. The average return on a successful redesign is organic traffic recovering by +40 to +80% within the following 3 months.
How long does a website redesign take?
Allow 3 to 5 weeks for a business website of 5 to 10 pages, and 6 to 10 weeks for a site with more content or specific features. Testing before launch accounts for 20% of the total time, and it is the step that clients in a hurry want to cut, wrongly. The right rhythm: brief (1 week) → mockups (1 to 2 weeks) → build (2 to 4 weeks) → testing and fixes (1 week) → launch and indexing follow-up (1 week). In total: 6 to 10 weeks for a well run project. Compress those steps and you invite expensive mistakes.
Can you keep your current design and only change the technology?
Yes, a "design-preserving" technology migration is possible, and it is one of the options we offer at ConvertiLab. You keep the look and the identity of your current site, but we rebuild it on Next.js to improve performance dramatically. This approach is ideal for a business owner who is attached to the design but unhappy with the performance. Timeline: 2 to 3 weeks. Cost: lower than a full redesign, because there is no design work.
Will we lose our search rankings during the redesign?
No, not if the redesign is properly planned. With a rigorous 301 redirect plan, your best performing URLs kept in place and careful technical SEO (title and meta tags, speed, H1 and H2 structure), your rankings will not only be preserved but improved. Across the 40+ redesigns ConvertiLab has carried out, no client has lost organic traffic at 3 months, and 80% saw traffic rise within 6 months.
Should you change your domain name during a redesign?
No, unless your current domain has been penalised by Google or carries a bad reputation. Changing domain is one of the riskiest moves in SEO: you lose all the authority built up by your existing backlinks and start from zero in Google's eyes. If you absolutely must change domain, set up permanent 301 redirects from every old URL to the new one and submit the change of address in Google Search Console. !Changing domain during a redesign, SEO risks, redirects, authority, backlinks
