How to Maintain SEO During a Website Redesign

Why Website Redesigns Can Hurt SEO

Planning a website redesign? Make sure it doesn’t erase years of SEO progress.

Many businesses focus on the visual improvements of a redesign—new layouts, colors, and features—while overlooking the search authority their existing site has built over time.

Without a plan, a redesign can unintentionally break indexed pages, eliminate backlinks, and cause rankings to drop.

To maintain SEO during a website redesign, you must carefully transfer your site’s structure, URLs, and content so search engines recognize the new site as the same trusted resource.

Website Redesign SEO Checklist

Here is how to ensure your new site launches with its rankings protected.

1. Keep Your URLs the Same (URL Mapping)

The fastest way to lose rankings is to change your URLs without a plan. If a search engine has indexed your “About” page as /about-us/ and your new site changes it to /about/, that connection is broken.

The Best Practice: Whenever possible, keep your file names and URL structures exactly the same.
Note: If a URL is not changed from the old site to the new site (i.e. /about-us/ to /about-us/) for each web page, then skip the next section about 301 ReDirects. Your new website design will launch seamlessly.

2. Implement 301 Redirects

If your URLs must change (which often happens when switching to a new platform), you cannot skip this step. You must ask your developer to implement 301 Redirects. The “redirect” tells Google that the webpage(s) move is permanent and to transfer your rankings “credit” to the new webpage.

Why Redirects Matter: Without these redirects, your old links will result in 404 “Page Not Found” errors. This doesn’t just frustrate visitors; it tells Google that your content is gone, which can cause your rankings to plummet.
Planning for Redirects with Page Mapping: Your web developers might ask you to create a hierarchy of your website and match the old pages to the new pages. Or you can ask your SEO consultant or your developer to do this. The web page mapping information will help your developer create the redirects.

Old URL (Current Live Site)	New URL (Proposed New Site)	Redirect Type	Priority
/index.html	/	301	Critical
/about-us.php	/about/	301	High
/contact-us.html	/contact/	301	High
/blog/post-title-old.html	/blog/updated-post-title/	301	Medium

3. Preserve Your Page Titles and Headings

Search engines rank your pages based on the content and titles they’ve crawled for years. If your Home page is currently titled “Professional Consulting Services,” changing it to a simple “Welcome” will confuse the algorithms.

One common mistake I see is businesses getting casual with their standard pages—for example, changing a “Contact” page to “Drop Us a Line.”

The Strategy: Keep “Contact” as your URL, Page Title, and H1 header. This ensures the search engine knows exactly what the page is for.
Creativity in the H2: If you want to show personality, use the H2 (the sub-title) to be more casual. Use your H2 to say “Drop Us a Line” while the “bones” of the page stay search-friendly.

4. The Advantage of Modern CMS Themes

If you are using a Content Management System (CMS) like WordPress, Wix, or Squarespace, you have a built-in safety net. You can often update the “Theme” (the visual look) while keeping the underlying structure—file names, metadata, and content—completely untouched. This is the safest way to “redesign” because, to a search engine, the DNA of the site remains identical.

5. Optimize Images for Speed and SEO

A redesign is the perfect time to audit your images. High-resolution photos are beautiful, but they can be massive files that slow down your site. Since speed is a major ranking factor, optimization is key.

Who is Responsible? Typically, the client is responsible for choosing the images and naming them, while the developer is responsible for technically optimizing them (compressing and ensuring they are the correct dimensions) during the upload process. However, you should always clarify this in your project scope to ensure images aren’t just “dumped” onto the server in their raw, oversized format.
How to Optimize:
- Resize Dimensions: If an image is only appearing as a 400px wide thumbnail, don’t upload a 5000px wide original. Resize the image to the maximum size it will actually be displayed.
- Compression: Use tools like TinyPNG.com or squoosh.app to strip away unnecessary data without losing visual quality.
- Modern Formats: Ask your developer if they can serve images in WebP format, which provides superior compression compared to standard JPEGs. Rename for SEO: Instead of DSC_001.jpg, rename images to include descriptive keywords, like cat-toy.jpg. This helps you show up in Google Image searches.
- A “Safety” Tip: If you’re using royalty-free images, try to keep a part of the original file name (e.g., cat-toy-shutterstock_12345.jpg). This creates a digital trail that helps verify your right to use the image if you are ever challenged.

6. Check Internal Links

After a redesign, internal links may still point to old URLs. Your developer or SEO specialist should run a crawl using tools like: xxx Screaming Frog Ahrefs SEMrush xxx This ensures all internal links point to the correct pages and prevents redirect chains.

Final Tip: Bring SEO Into the Redesign Early

The best time to think about SEO is before the first redesign mockup is created. If your developer is not an SEO specialist, bring an SEO consultant into the planning stage early.

A proactive SEO strategy ensures that when your new website launches, it doesn’t just look better—it retains and improves the search rankings you’ve built over the years.

“Many of my clients have worked with me for over 10 years. During that time their websites have evolved from HTML to ASPX, PHP, WordPress, Joomla, Wix, and Squarespace. Maintaining and improving SEO during those redesigns is one of the most important parts of the process.” ~ Kate Rafferty

FAQs

Q: Will I lose SEO when redesigning my website?
- A: You can lose rankings if URLs change without redirects or if page structure and metadata are removed.
Q: What iWhy did my traffic drop after my redesign?
- A: This is usually due to broken 301 redirects, a “noindex” tag accidentally left on from the staging site, or changing high-performing H1 headers.
Q: How long does it take for SEO to recover after a relaunch?
- A: With modern crawling, you can expect rankings to fluctuate for 2–4 weeks. If traffic hasn’t returned to baseline after 30 days, there is likely a technical error like a redirect loop.
Q: Should I change my URLs for better SEO?
- A: If a page is already ranking well, don’t touch the URL. Only change it if the current version is unreadable or the site structure has completely changed.