A new website is exciting. Fresh design, faster pages, a site you are finally proud to send people to. But there is a question that often gets asked too late: will a redesign affect our SEO?

The honest answer is yes, it will. Whether that effect is good or bad depends almost entirely on how the redesign is planned. Done well, a redesign is one of the best things you can do for your rankings. Done carelessly, it can undo years of work in a weekend.

This guide explains what changes during a redesign actually matter to Google, and how to protect the rankings and traffic you already have.

Why a redesign can hurt your rankings

Google does not rank “your website”. It ranks individual pages, based on their content, their links and how well they answer a search. A redesign can change all three at once. The most common problems are:

• Changed URLs with no redirects. If /services/plumbing/ becomes /what-we-do/plumbing-services/ and nothing tells Google, the old page simply disappears. Every link pointing to it now leads to a 404 error.
• Lost content. Designers love a clean, minimal page. But if the copy that was ranking gets cut to three short sentences, Google has far less reason to show it.
• Missing titles and meta descriptions. These are often left behind when pages are rebuilt, so search results show generic or messy snippets.
• Broken internal links. Old menus, buttons and in-text links that point to pages that no longer exist.
• A slower site. Large images, heavy animations and video backgrounds can make a beautiful site sluggish, especially on mobile.
• The development site left blocked. Staging sites are usually hidden from Google. If that setting goes live with the new site, your whole website can drop out of search.

Why a redesign can also help

The good news is that a redesign is also a rare chance to fix things that have been holding your site back for years. A well planned redesign can:

• Speed up your pages and improve how they perform on mobile
• Give your most important services their own clear, well written pages
• Tidy up your site structure so Google (and your visitors) can understand it
• Fix old technical issues like duplicate pages, broken links and missing headings
• Make it easier for visitors to get in touch, which is the whole point

If you are still weighing up whether a new site is worth it, our guide on 10 ways a website redesign can benefit your small business covers the wider benefits.

How to protect your SEO during a website redesign

1. Benchmark before you touch anything

Before the redesign starts, record where you are now. You cannot tell whether a launch went well if you do not know what “normal” looked like. At a minimum, save:

• Your top pages by organic traffic (from Google Analytics)
• Your top search queries and their average positions (from Google Search Console)
• A full list of every URL on your current site
• Which pages have links from other websites pointing to them

2. Decide what happens to every page

Go through your URL list and give every page one of three outcomes: keep it (same URL), move it (new URL, redirected) or merge it (combined into another page, redirected). Pages that bring in traffic or have external links should never just vanish.

3. Keep URLs the same wherever you can

The safest redirect is the one you never need. If a URL is working, keep it. Change URLs only when there is a real benefit, such as fixing a structure that genuinely makes no sense.

4. Set up 301 redirects for anything that moves

A 301 redirect tells Google a page has moved permanently and passes visitors (and most of the page’s ranking strength) to the new address. Map each old URL to the most relevant new page. Avoid the shortcut of redirecting everything to the homepage, as Google tends to treat that much like a missing page.

5. Keep the content that ranks

Your new design should be built around your best content, not the other way round. If a page ranks well, keep its core copy, headings and topic. Improve it by all means, but do not strip it back to make the layout look tidier.

6. Carry over titles, descriptions and headings

Every important page should launch with a proper SEO title, meta description and a single clear H1 heading. These are easy to forget and easy to fix before launch.

7. Check speed and mobile before launch

Compress images, avoid oversized video files and test key pages on a real phone. Google uses the mobile version of your site to decide where you rank, so mobile matters more than desktop.

8. Launch, then check everything

On launch day:

• Make sure the site is not set to discourage search engines
• Submit your new XML sitemap in Google Search Console
• Test a sample of old URLs to confirm they redirect correctly
• Crawl the new site for broken links and 404 errors
• Check analytics and tracking are still recording

What to expect after launch

Even with a perfect migration, it is normal to see some movement in rankings for a few weeks while Google recrawls the site and processes the redirects. Keep a close eye on Search Console for the first month or two. A small, short dip is normal. A sharp, lasting drop usually points to a missed redirect, a blocked page or lost content, and the sooner it is caught the easier it is to fix.

If your redesign also involves moving to a new platform, our guide to CMS migration SEO goes into more detail.

Your website redesign SEO checklist

• Benchmark traffic, rankings and top pages
• Export a full list of current URLs
• Decide to keep, move or merge every page
• Keep URLs the same where possible
• Map 301 redirects for every changed URL
• Keep and improve the content that ranks
• Set SEO titles, meta descriptions and H1s
• Test speed and mobile
• Remove any “noindex” settings at launch
• Submit the sitemap and monitor Search Console

Planning a redesign? Let’s get it right first time

At Delivered Social, SEO is built into every website we design from the start, not bolted on afterwards. We plan redirects, protect the content that ranks and check everything after launch, so your new site looks great and keeps getting found.

Wondering what a new site would cost? Take a look at our UK website cost guide, explore our SEO services, or get in touch for a friendly chat.