Most website redesigns start the same way. Someone opens the site, feels that it looks dated, and the project begins there. It is the most expensive way to start, because a feeling gives you no way to know whether the new site will perform better than the old one.
There is a more useful starting point. According to a HubSpot study from 2025, the average useful life of a business website is three to five years before it becomes a constraint on the company running it. But age on its own decides nothing. What decides is a short list of signals you can measure this afternoon.
Signal 1: your Core Web Vitals are in the red
Google publishes the thresholds and applies them. A Largest Contentful Paint above 2.5 seconds, an Interaction to Next Paint above 200 milliseconds or a Cumulative Layout Shift above 0.1 means your site fails the performance tests that feed ranking.
The financial reading matters more than the technical one. A Portent study from 2024 found that a site loading in one second converts at three times the rate of a site loading in five seconds. Amazon calculated that one extra second of latency costs 1.6 billion dollars in annual sales. If your mobile score sits below 50, you are no longer tuning at the margin: the architecture itself is the problem.
Signal 2: mobile is an afterthought
68 % of global web traffic comes from mobile devices, according to Statcounter in January 2026. Google has used mobile-first indexing since 2021, which means the mobile version of your site is the one evaluated for ranking, not the desktop one you look at every day.
Responsive in the sense of shrinking to fit stopped being sufficient some time ago. Open your own site on your own phone, on a mobile connection, and time how long it takes before you can read something useful. That number is what your visitors experience, and it is rarely the number your desktop browser suggests.
Signal 3: you cannot change your own content
This one is easy to miss because you adapt to it. If publishing a page, changing a price or adding a case study requires a developer and a two-week queue, your site is not a tool any more, it is a dependency. The cost is invisible because it shows up as things you stopped doing rather than as an invoice.
Signal 4: security keeps interrupting you
If your site runs on a CMS with a large plugin surface, the exposure is structural rather than accidental. According to Sucuri, 96.2 % of infected CMS sites in 2025 were WordPress sites, and the Wordfence 2025 report puts the average at 90,000 attack attempts per day against a WordPress site.
That does not make WordPress the wrong choice everywhere. It makes an unmaintained WordPress an expensive one, and repeated incidents a signal that the maintenance model, not the software, has failed.
Signal 5: your search visibility is drifting down
Slow decline is harder to notice than a sudden drop, and more common. Look at impressions and average position over twelve months rather than at last week. A site losing ground while publishing nothing new is usually being outranked on speed and structure, not on content.
Signal 6: the design is doing the opposite of its job
Appearance is the weakest signal on its own and the one everybody starts with. It becomes real when it costs credibility: visitors judge a site in a few seconds, and a layout that looks abandoned suggests a business that might be too. Treat it as a tiebreaker between several red signals, never as the reason by itself.
Redesign or repair: how to decide
The rule is simple. One red signal means fix that signal. Several at once, especially performance plus editorial autonomy plus security, means the architecture is the cause and repairs will keep repeating.
Before deciding, get the numbers. Our free online audit tool measures your page in seconds, with no signup and no email address: tags, indexability, mobile, structured data, response time. You get the figures and do what you like with them.
If you would rather have those numbers read for you, describe your project and we reply in writing. Everything happens by email, no meeting required.
