Website redesigns kill SEO rankings every single day. Not because redesigns are bad for SEO — they’re not — but because the same avoidable mistakes get made on project after project. URLs change without redirects. Content that was ranking gets deleted. Page speed drops. Schema markup disappears. Google re-crawls the site and finds something completely different from what it indexed before.
Here’s exactly how to prevent it.
Before You Start: Crawl and Document Everything
Before a single design file is opened, crawl your existing site with Screaming Frog or Ahrefs and export every URL that’s currently indexed. For each URL, document: current position for target keywords, monthly organic traffic, inbound links pointing to it, and meta title and description. This is your baseline. Everything you’re protecting.
The 6 Things That Kill SEO in Redesigns
1. Changed URLs without 301 redirects
This is the single most common cause of post-redesign ranking drops. If /services/branding becomes /branding — and there’s no 301 redirect from the old URL to the new one — Google treats the new page as brand new with zero history. All the authority built on the old URL is gone. Map every URL change before launch and implement 301 redirects for every single one.
2. Deleting content that was ranking
Pages that were ranking — even modestly — have earned that position through content quality and inbound links. Deleting them removes that equity entirely. Audit every page before the redesign. If it’s ranking for anything, either keep it, consolidate it into a new page with a redirect, or replace it with something better.
3. Page speed regression
A redesign that adds large images, heavy JavaScript, or bloated plugins can drop Core Web Vitals scores significantly. Google penalizes slow sites. Test page speed on staging before launch and ensure the new site is at minimum as fast as the old one — ideally faster.
4. Removing schema markup
If your old site had FAQ schema, Organization schema, or Article schema — and the redesign removes it — Google loses structured data signals it was using to understand your content. Audit existing schema and ensure it’s replicated or improved in the new build.
5. Changing heading structure
H1, H2, H3 hierarchy is a primary on-page SEO signal. A redesign that flattens heading structure — or uses headings for visual styling rather than content hierarchy — disrupts Google’s understanding of what each page is about.
6. Launching without submitting a new sitemap
After launch, submit the new XML sitemap to Google Search Console immediately. This tells Google to re-crawl the new site structure rather than waiting for natural discovery — which can take weeks.
The Launch Checklist
- All URL changes mapped with 301 redirects implemented and tested
- All ranking pages either preserved, consolidated with redirects, or replaced with improved content
- PageSpeed Insights mobile score 70+ on staging before launch
- Schema markup audited and replicated
- Meta titles and descriptions migrated for all ranking pages
- Heading structure reviewed on all key pages
- New XML sitemap submitted to Google Search Console on launch day
- Google Analytics and Search Console verified and tracking
Frequently Asked Questions
Will a website redesign hurt my SEO?
Only if handled carelessly. The mistakes above are all preventable. A well-executed redesign can actually improve SEO — better page speed, improved content, cleaner structure.
How long to recover after a bad redesign?
6–12 months if redirects were missed and content deleted. Prevention is always cheaper than recovery. See our full website redesign checklist.
Redesigning your site and want to protect your SEO?
Splash Creative builds every redesign with SEO preservation built in from day one.
