Website redesign without losing SEO – a step-by-step guide

Why rankings drop after a redesign

Search engines build up their understanding of your site URL by URL: what each page is about and how often others link to it. A redesign loses SEO when that history fails to transfer to the new pages. Most drops trace back to one of these causes:

• Changed URLs without redirects: old addresses return 404 errors
• Thinner content: explanations and FAQs were cut to make the design cleaner
• New titles and headings: the words that used to rank disappeared from them
• Fewer internal links: key pages are harder to reach from the menu and other pages
• Launch settings left on: the noindex tag or robots.txt block from staging went live
• Slower pages: heavy images and video made the mobile site sluggish

All of these can be caught before launch. Decide what to carry over before you rebuild, and a renewal can even become a chance to rank better. If your rankings have already fallen, see why search rankings drop and how to recover.

Audit what already ranks before you rebuild

Start by measuring which parts of the current site search engines value. Deleting a page because it "looks old" can remove the one that brings most of your search visitors. Collect the following:

• Every URL: from the sitemap or CMS, including blog posts, images and PDFs
• Top search pages: in Google Search Console, the pages and queries with the most impressions and clicks over the last 12 months
• Pages that convert: in GA4, the pages people view before an inquiry or purchase
• Pages others link to: from partner sites, social media, flyers and QR codes
• Current titles and descriptions: title, meta description and h1 of key pages
• Baseline numbers: rankings for main queries and monthly organic visits

This list becomes the source for your URL map and the baseline for comparing results after launch. If Search Console or GA4 are not set up yet, add them a few months before the renewal.

Build a URL map and set up 301 redirects

A URL map is a spreadsheet with every old URL and its new destination, one per row. Use columns such as old URL, new URL, action (keep, merge, remove) and notes, and fill it from your audit.

• Keep URLs when you can: rebuilding a page at the same address is the safest option
• Redirect one to one: send each moved page with a 301 to the closest matching new page
• Merged pages go to the merged page: each old page points to its new combined version
• Avoid mass redirects to the home page: unrelated destinations pass little value
• No redirect chains: point old redirects straight to the final new URL
• Remove only truly unused pages: no traffic and no links – return a 404 or 410

A domain change, a move from http to https or a platform switch such as WordPress to Shopify multiplies the number of redirects. Setup details and platform notes are in our guide to 301 redirects and site migration SEO.

A checklist for content parity

Correct redirects are not enough if the destination page has less to offer. When you move to the new design, check page by page that the elements search engines valued are still there.

• Body copy: keep the explanations, price tables and FAQs of high-traffic pages, reorganized where useful
• Titles and h1: keep the main search terms, even when you rewrite
• Meta descriptions: a short, unique summary for each page
• Image alt text: describe products, services and what each image shows
• Internal links: menus, breadcrumbs and in-text links that reach key pages
• Canonical tags and structured data: pointing to the new URLs, with business and FAQ markup kept
• XML sitemap and robots.txt: a sitemap of new URLs, and no leftover blocking rules
• Tracking: GA4, Google Ads tags and inquiry conversion events on the new site

Rewriting copy is fine. What matters is that each page still answers the searcher's question with the same depth and detail. Give new pages a clear role of their own so they do not compete with existing ones.

What to monitor on launch day and for three months after

After launch, search engines need time to recrawl your new URLs. Some ranking movement is normal; configuration mistakes cost less the sooner you find them.

• Launch day: test the old URLs from your map and confirm each one lands on the right new page; check noindex is gone and forms send
• First days: submit the new sitemap in Search Console and request indexing for key pages with URL Inspection
• Weeks 1–2: watch the Page indexing report for new 404s and "Crawled – currently not indexed" pages
• Months 1–3: compare rankings, organic visits and inquiries with your baseline
• Ongoing: add redirects for any old URLs that still return 404, and review pages that lost traffic

Rankings typically settle within a few weeks to two or three months. Pages that do not recover after that usually need a closer look at the redirect target or at content that was cut. Keep the redirects in place for at least a year.

How UNANOBO protects SEO in a renewal

Before you commit, UNANOBO builds a free demo: a new design based on your current content and brand. Once you decide to go ahead, we build the URL map from your existing pages and agree with you which pages stay, which merge and which are new.

Before launch we check redirects, titles and tracking; after launch we watch Search Console and adjust. The founder handles every project personally, so the same person who reviewed what ranked on your old site also follows up after launch. Everything runs by message, in Japanese or English. If you are also rethinking the design and structure, see website renewal.