How to Avoid Killing Your SEO During a Website Redesign
A website redesign can improve user experience, but it can also harm SEO if not handled properly. This guide covers essential SEO best practices to protect rankings, maintain organic traffic, and ensure a smooth transition during a redesign.
May 16, 2025
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Redesigning your website can feel exciting — new look, better UX, improved branding. But here’s the harsh truth: even small changes during a redesign can quietly wreck your SEO if you’re not paying attention.
And when that happens, the damage hits fast:
- Rankings drop
- Organic traffic tanks
- Backlink value gets wiped out
- Pages break or disappear
- Mobile experience suffers
- Internal links stop working
- Duplicate content shows up
Take this as a warning: one site deleted just 15% of its organic pages during a redesign — and lost nearly 50% of its organic traffic. Even a boost in backlinks afterward couldn’t reverse the hit.
The good news? SEO disasters like this are totally avoidable — if you follow six essential steps.
Back Up the Original Site Before You Touch Anything
This step is so basic it gets overlooked — but it’s your safety net.
A complete backup means that if something goes wrong, you can bring the old site back online quickly. Have your developer set up a fallback version that can be restored on demand. Ideally, it should live in a separate folder on your server, and be ready to activate with a quick domain redirect.
Just make sure the current database doesn’t get overwritten.
Even better — make your own copy. Most hosting providers offer one-click backups. If you’re using a CMS, look for plugins that automate the process.
Test the Staging Site for Mobile and Page Performance Before Launch
Redesigns often mess with page speed and mobile usability — sometimes without you even realizing it.
Before your new site goes live, check the basics:
- How fast does each page load?
- Are layouts responsive across devices?
- Are animations, media, or custom code causing lag or layout shifts?
Mobile-friendliness and core page performance are key parts of Google’s ranking system. You don’t need to test every page — just focus on your main templates. Run performance and mobile checks on both desktop and mobile views. If the staging site is password-protected, make sure the testing tool you use can access it.
Once you finish testing, pay close attention to:
- Slow load times
- Large file sizes
- Layout shifts
- Unresponsive buttons or menus on mobile
These kinds of issues can hurt rankings before the new site even has a chance to succeed.
Run a Site Audit Before and After the Redesign
A proper site audit helps you catch what’s broken — before and after launch.
Run one on the old site first. Then, immediately after the new site goes live, run another and compare the results.
Here’s what to look for:
- Pages marked noindex that shouldn’t be
- Mixed HTTP/HTTPS issues
- Broken internal links or missing pages
- Redirects not working
- Duplicate metadata or titles
- Missing alt text or structured data
Pay special attention to anything that’s new or missing in the post-launch version. Not all issues are equally important — but some can crash your traffic if left unchecked.
Also, keep a record of both audits. Being able to look back and trace exactly what changed will save you hours of guesswork if problems show up later.
Don’t Mess With the URL Structure Unless You Absolutely Have To
Changing your URL structure is one of the riskiest moves in a redesign. A small tweak can break dozens (or hundreds) of backlinks and internal links in one shot.
Here are some examples of URL changes that matter:
- Removing or adding slashes (/blog → /blog/)
- Changing folder names (/blog → /resources/blog)
- Moving sections to subdomains (/blog → blog.example.com)
- Renaming tools or product paths (/site-audit → /site-audit-tool)
If you need to change your URL structure, create a full list of redirects — and test every one of them. A missed redirect means a broken link. Too many of those, and your authority starts to bleed out.
And no matter what, always submit a new sitemap to Google. It helps speed up indexing and reduces confusion as search engines adjust to the new structure.
Don’t Delete High-Performing Pages Just Because They’re Old
Content pruning can be useful — but deleting the wrong pages is a quick way to lose rankings.
Before you remove anything, identify which pages are:
- Ranking for valuable keywords
- Bringing in steady organic traffic
- Attracting external backlinks
- Holding strong internal link equity
Even if a product or service is no longer available, consider keeping the page live in an archive or resource section. Redirecting everything to your homepage or a different product isn’t always the best move — especially if the original page had search value.
If you do remove content, always ask:
Does this page serve a purpose, or is it silently holding SEO value that I’m about to lose?
Be Extra Careful With Pages That Already Rank
If a page is doing well in search, approach changes like surgery — not demolition.
Watch out for these common mistakes:
- Changing keywords in titles or headers: Even slight rewrites can weaken relevance for key search queries.
- Overhauling content structure: Adding or removing content is fine — just make sure the new version still meets search intent.
- Cutting internal links: These help distribute link equity and guide Google’s crawl. Don’t remove them casually.
- Burying important pages too deep: Keep top pages close to your homepage — ideally within two or three clicks.
- Messing up structured data: If the page had schema markup, make sure it’s still accurate after the redesign.
- Slowing down page speed: High-performing pages need to stay fast. Don’t weigh them down with large media files or heavy scripts.
In short, redesign around your SEO winners — not through them.
Final Thoughts
A website redesign is the perfect time to modernize your look and improve usability — but it’s also a critical moment for SEO. Change too much, too fast, and you could erase years of progress in days.
The key is balance: preserve what works, fix what’s broken, and roll out changes with clear intention.
And remember — SEO always involves a bit of guesswork. No one can predict exactly how Google will respond. But if you approach your redesign with these steps in place, you’ll give your site the best chance to grow, not stumble.
