A website redesign is one of the most exciting, and most dangerous, things a business can do online. Exciting because a fresh design can transform how customers perceive your business. Dangerous because I’ve seen redesigns destroy years of SEO progress, break existing functionality, and cost twice what they should have.
The difference between a successful redesign and a disaster usually comes down to preparation. Not design skills, not development expertise, preparation. The businesses that do their homework before the first mockup get great results. The ones that wing it get burned.
I’ve put together this checklist from real projects, the ones that went smoothly and the ones that didn’t. Use it before you start your redesign, and you’ll avoid the mistakes I’ve seen sink dozens of projects across Spain and beyond.
First question: do you actually need a redesign?
This might seem like an odd way to start a redesign checklist, but it’s the most important question. A full redesign is expensive and disruptive. Sometimes what you actually need is a targeted update.
You need a redesign if: Your site was built more than 5 years ago and the underlying technology is outdated. Your site isn’t mobile-responsive (still surprisingly common in Spain). Your brand has changed significantly. Your business model has shifted and the site no longer reflects what you do. The site is so technically broken that patching it costs more than rebuilding.
You probably just need updates if: You’re bored with the design (that’s not a business reason). A few pages need refreshing but the core structure works. You want to add a blog or new section. Your site is slow but the design is fine (that’s a performance issue, not a design one). You want better SEO (again, usually fixable without a full redesign).
I’ve talked clients out of redesigns that would have cost them 5,000-10,000 euros when what they actually needed was a 1,500 euro update. A responsible studio will tell you this. An irresponsible one will happily sell you a redesign you don’t need.
Phase 1: Audit what you have
Before you design anything new, you need to understand what’s working and what isn’t on your current site. Skip this and you’ll repeat old mistakes and lose things that were actually performing well.
Content audit
Go through every page on your current site. For each page, decide: keep as-is, update, merge with another page, or delete. Create a spreadsheet, yes, actually create one, with every URL, its current traffic (check Google Analytics or Search Console), and your decision.
You’ll probably find that 20% of your pages drive 80% of your traffic. Those pages need special attention during the redesign. You also might find pages you forgot existed, outdated service pages, blog posts from 2019, landing pages for campaigns that ended years ago. This is your chance to clean house.
I worked with a law firm in Malaga that had 150 pages on their site. During the content audit, we discovered that 12 of those pages drove 90% of their organic traffic. Those 12 pages became the backbone of the new site. The other 138 pages were either updated, consolidated, or properly redirected. Without the audit, we might have accidentally restructured one of those top-performing pages and tanked their traffic.
SEO audit
This is where redesigns most commonly go wrong. Your current site has SEO equity, backlinks, rankings, domain authority, that took years to build. A bad redesign can wipe that out overnight.
Before the redesign, document: every URL on your current site (use Screaming Frog or a similar crawler), which pages rank for which keywords (Search Console data), all incoming backlinks (use Ahrefs, Semrush, or Search Console), your current sitemap and site structure, all meta titles and descriptions, all internal linking patterns.
This documentation is your insurance policy. If anything goes wrong after launch, you can trace exactly what changed and fix it. I’ve been called in to rescue redesigns where the previous agency changed every URL without creating redirects. The business lost 70% of its organic traffic in two weeks. Don’t be that business.
Technical audit
Check your current site’s technical health: page speed scores, mobile usability issues, broken links, crawl errors, Core Web Vitals scores. The redesign should fix these problems, not create new ones. If you don’t know your baseline, you won’t know if the new site is actually better.
Analytics review
What are your current conversion rates? How many contact form submissions per month? What’s your bounce rate on key pages? What are the top entry pages from organic search? What are the most common user journeys through the site?
These numbers are your benchmark. After the redesign, you should see these metrics improve, or at least not decline. If your conversion rate drops after launch, you need to know immediately so you can investigate and fix it.
Phase 2: Plan the new site
Define clear goals
What should the redesigned site achieve that the current one doesn’t? Be specific and measurable. “Look more modern” is not a goal. “Increase contact form submissions by 30%” is. “Reduce bounce rate on service pages from 65% to under 45%” is. “Support Spanish and English content for our international audience” is.
Three to five measurable goals. Write them down. Share them with your designer. Every design decision should be evaluated against these goals. If a design element looks great but doesn’t serve any goal, question whether you need it.
Plan your URL structure
If any URLs are changing, plan your 301 redirect map before development starts. Every old URL must redirect to its equivalent new URL. Every. Single. One.
This is the most technically critical part of any redesign involving URL changes. Miss a redirect and you lose any SEO equity that URL had. Miss a hundred redirects and you’ve effectively told Google that half your site no longer exists.
Create a spreadsheet with two columns: old URL and new URL. This becomes your redirect map. Your developer implements it before launch. You test every redirect before going live. No exceptions.
Plan content migration
Which content moves to the new site unchanged? Which content gets rewritten? Which content is new? Who’s responsible for each piece?
Content is the biggest bottleneck in redesigns, just like in new builds. If you’re rewriting 20 pages of content, that takes time. Build it into the timeline. Don’t assume you’ll “just update the text” during the final week before launch, you won’t.
Choose your technology carefully
If you’re switching platforms (for example, from Wix to WordPress, or from an old custom CMS to something modern), understand the implications. Every platform has different capabilities and limitations. Your designer should advise on this, but you should understand the trade-offs.
Switching platforms adds complexity, time, and cost. If your current platform is working technically and you’re just updating the design, staying on the same platform is usually smarter. If the platform itself is the problem (it’s slow, insecure, or limiting your growth), then switching makes sense, just budget accordingly.
Phase 3: Protect your SEO
I’m giving SEO its own section because it’s where the most damage happens during redesigns. I’ve seen businesses lose 50-80% of their organic traffic because SEO wasn’t prioritized during a redesign. That’s months or years of work and thousands of euros in lost revenue.
The redirect checklist
Create 301 redirects for every URL that changes. Test every redirect before launch. Set up monitoring for 404 errors after launch (Search Console reports these). Check for redirect chains (A redirects to B which redirects to C, these should be A directly to C). Preserve your XML sitemap and submit the updated version to Search Console immediately after launch.
On-page SEO preservation
Keep existing meta titles and descriptions for pages that are performing well. Maintain heading structure (H1, H2, H3), don’t accidentally remove your keyword-optimized headings during the redesign. Preserve image alt text. Keep internal links intact or update them to point to new URLs.
Technical SEO checks
Ensure the new site has the same or better page speed. Verify mobile responsiveness across devices. Check that robots.txt isn’t accidentally blocking important pages. Confirm canonical tags are correct. Test that structured data (schema markup) is still present and valid.
A common disaster: the development site is built with a robots.txt that blocks all crawling (standard practice during development). Someone forgets to update it at launch. Google stops indexing the entire site. I’ve seen this happen three times in the past two years. Always check robots.txt on launch day.
Phase 4: The launch checklist
You’ve done the audit, planned the new site, built it, and tested it. Here’s what to check before you flip the switch.
Pre-launch (1 week before): Test all forms and they actually deliver emails. Check all links, internal and external. Test on real mobile devices, not just browser preview. Verify page speed on key pages. Check all images have alt text. Review all meta titles and descriptions. Test the redirect map. Back up the current site completely.
Launch day: Deploy the new site. Implement all 301 redirects. Update robots.txt to allow crawling. Submit new sitemap to Google Search Console. Test the live site on multiple devices. Verify SSL certificate is working. Check that analytics tracking is firing on all pages. Test all contact forms on the live site. Clear all caches.
Post-launch (first 2 weeks): Monitor Search Console daily for crawl errors, 404s, and indexing issues. Watch analytics for traffic drops or conversion changes. Check rankings for your top keywords. Fix any 404 errors immediately. Ask real users (employees, friends, clients) to test the site and report issues.
Post-launch (first 3 months): Compare traffic, rankings, and conversions to your pre-redesign benchmarks monthly. Address any SEO declines immediately, don’t wait for them to “settle.” Update Search Console if you notice indexing anomalies. Continue monitoring 404 error reports.
Common redesign disasters (and how to avoid them)
The vanishing traffic disaster. Changed URLs without redirects. Fix: always create a redirect map before launch. Monitor Search Console for 404 errors daily for the first month.
The “it looked great in the mockup” disaster. The design looks beautiful but the site is impossible to navigate. Real users can’t find what they need. Fix: test with real users before launch. Ask five people who’ve never seen the site to complete specific tasks (find the contact page, request a quote, find pricing information). Watch them struggle and fix accordingly.
The speed disaster. The new site is slower than the old one because of oversized images, unnecessary animations, too many plugins, or poor hosting. Fix: set performance budgets before development starts. The new site should be faster than the old one, period. Test speed with Google PageSpeed Insights and target scores above 80 on mobile.
The content disaster. The new site launches with placeholder text, missing pages, or broken content because nobody finished the content migration. Fix: content should be 100% complete and reviewed before the launch date is set. Not 90%. Not “we’ll update it next week.” 100%.
The “we forgot about mobile” disaster. The site looks perfect on desktop but is unusable on phones. With over 70% of Spanish web traffic on mobile, this is a catastrophic oversight. Fix: design mobile-first. Test on real phones throughout development, not just at the end.
Should you do it yourself or hire help?
A redesign has more moving parts than a new build. You’re not just creating something new, you’re replacing something that exists, preserving what works, fixing what doesn’t, and making sure nothing falls through the cracks during the transition.
If your site has significant organic traffic, hire a professional. The cost of a botched SEO migration alone can exceed the cost of the entire redesign. If your site is simple and gets minimal traffic, a careful DIY approach using this checklist can work.
Either way, don’t rush it. A redesign done right takes 6-10 weeks minimum. One done wrong can take months to recover from. Take the time to prepare, audit, plan, and test. Your future self, and your Google rankings, will thank you.
Need a professional eye before you start? A site audit can tell you exactly what needs fixing and whether a redesign is even necessary.