A new website can look better, work better and convert more customers.
But if you already get traffic and enquiries from Google, there’s something else your redesign needs to do:
Protect the SEO value you’ve already built.
I’ve seen website redesigns where SEO is considered far too late in the project. The new site is designed, developed and almost ready to launch before anyone asks what will happen to the existing URLs, rankings, content or backlinks.
By then, important decisions have already been made.
I’m currently going through this process with New Era Digital’s own website redesign. Rather than simply copying everything from our existing website onto the new one, I’ve reviewed what we’re keeping, what needs improving, which content is still performing and what can be retired.
I’m also mapping changed URLs, preparing redirects, checking tracking and making sure the technical SEO is ready before the new website replaces the old one.
That’s the approach I’ll take you through in this guide.
Whether you’re redesigning your website yourself or working with an agency or developer, this website redesign SEO checklist will help you understand what should happen before, during and after launch.
Quick Website Redesign SEO Checklist
If you’re already in the middle of a redesign, start here.
| Stage | Essential SEO checks |
|---|---|
| Before redesign | Benchmark traffic, rankings and conversions; crawl your current website; identify valuable pages and backlinks |
| During the build | Plan the new structure; decide what content stays; preserve important SEO elements; map changing URLs |
| Before launch | Prepare 301 redirects; check indexation settings, canonicals, internal links, sitemap, mobile usability, forms and tracking |
| Launch day | Activate and test redirects; crawl the live website; check tracking; submit sitemap; look for 404s |
| After launch | Monitor rankings, organic traffic, conversions, indexation, crawl errors and redirects |
Download the Website Redesign SEO Checklist
Planning a website redesign? I’ve put the key SEO checks from this guide into a simple one-page checklist you can use before, during and after your website launch.
Download the Website Redesign SEO Checklist
If some of those terms aren’t familiar, don’t worry. I’ll explain each stage below.
Why can a website redesign affect SEO?
A redesign doesn’t automatically damage your SEO.
Problems usually arise because the redesign changes things that search engines already know about your website.
That could include:
- URLs
- website structure
- navigation
- internal links
- page content
- headings
- metadata
- structured data
- page speed
- mobile experience
- canonical tags
- indexation settings
A redesign may also involve moving to another CMS, changing hosting or consolidating large sections of the website.
Google doesn’t simply see a prettier version of your old site.
It needs to crawl and understand the new one.
If an important URL disappears without a redirect, internal links break or valuable content is removed, you can lose some of the signals associated with the old website.
That’s why SEO should be involved before the redesign starts, not added as a final launch task.
Before the Website Redesign
1. Benchmark your existing SEO performance
Before changing anything, establish your starting point.
Otherwise, if traffic changes after launch, you’ll have very little context for understanding what happened.
I’d record:
- organic traffic
- organic landing pages
- important keyword rankings
- Google Search Console clicks and impressions
- conversions from organic search
- top-performing pages
- backlinks to important URLs
Don’t just record overall organic traffic.
A website could maintain roughly the same total traffic while an important commercial page loses visibility.
Look at page-level performance as well.
Google Search Console is particularly useful here because its Performance report shows the queries and pages generating Google Search clicks and impressions.
2. Crawl your existing website
Create an inventory of the URLs that currently exist.
This gives you something concrete to compare against the redesigned website.
Depending on the size of the site, your crawl may uncover:
- indexable pages
- redirects
- 404s
- page titles
- meta descriptions
- headings
- canonical URLs
- internal links
- images
- status codes
Don’t rely solely on the navigation menu.
There may be older pages that aren’t immediately visible from the main navigation but still rank, receive traffic or have backlinks.
3. Identify the pages you cannot afford to lose
Not every URL has equal value.
Before deciding what moves to the new website, identify pages that currently:
- rank for valuable keywords
- receive organic traffic
- generate leads or sales
- have strong backlinks
- attract referral traffic
- support important internal links
I’d be particularly cautious about substantially changing a page that’s already doing its job.
A redesign is an opportunity to improve your website, but change for the sake of change isn’t always an improvement.
Should every old page move to the new website?
No.
And this is something I’m applying to New Era Digital’s own redesign.
I haven’t automatically migrated every blog we’ve ever published.
I’ve reviewed the existing content and considered what’s performing, what’s still relevant, what should be updated and what no longer deserves a place on the new website.
The important part is that each meaningful URL has a deliberate outcome.
A simple framework is:
| Existing content | Possible action |
|---|---|
| Performs well and remains relevant | Keep |
| Valuable but outdated | Improve |
| Several pages cover the same subject | Consolidate |
| Removed but has a relevant replacement | Redirect |
| Obsolete with no appropriate replacement | Retire |
This is much better than blindly copying years of outdated content onto your shiny new website.
It’s also why a content audit should happen before migration, rather than once the new site is already live.
During the Website Build
4. Plan the new website structure with SEO in mind
Your redesign is an opportunity to improve how the website is organised.
Think about:
- primary services
- product or service categories
- locations
- industries
- supporting content
- navigation
- internal linking
- conversion journeys
Google recommends organising a website logically and linking relevant pages together so that users and search engines can understand how the content relates.
SEO and UX aren’t opposing goals here.
A clear structure generally makes life easier for both people and search engines.
This is one of the reasons our approach to SEO website design considers structure, search behaviour, content and conversion alongside the visual design.
5. Don’t change URLs unnecessarily
A redesign doesn’t mean every URL needs to change.
If an existing URL:
- makes sense
- performs well
- accurately describes the content
- fits the new website structure
there may be little reason to replace it.
Every unnecessary URL change creates another redirect and another opportunity for something to go wrong.
Where URLs genuinely need changing, document them.
6. Create an old URL → new URL map
This is one of the most important parts of a website migration.
Create a spreadsheet containing your existing URLs and what should happen to each one.
For example:
| Existing URL | Decision | Destination |
|---|---|---|
| Ranking service page | Keep/update | Equivalent service page |
| Valuable outdated blog | Update | Updated article |
| Two overlapping articles | Consolidate | Strongest relevant article |
| Removed service | Redirect | Closest relevant alternative |
| Obsolete page with no equivalent | Retire | 404/410 if appropriate |
This becomes your redirect map.
And here’s an important point:
Don’t simply redirect every deleted page to the homepage.
A redirect should normally send users and search engines to the closest relevant replacement.
Google recommends permanent server-side redirects such as 301 or 308 redirects when a page has permanently moved.
7. Protect the SEO value of important pages
A common redesign mistake is keeping the URL but completely replacing the content without considering why the old page ranked.
If an important page already performs well, review:
- search intent
- primary topic
- useful supporting content
- headings
- title tag
- internal links
- external links
- images
- structured data
- backlinks pointing to it
That doesn’t mean you’re forbidden from improving the page.
Quite the opposite.
But understand what you’re changing and why.
Don’t strip a useful 1,500-word service page down to three lines of fashionable marketing copy and then wonder why its search visibility changes.
8. Rebuild your internal linking deliberately
Internal links often change significantly during a redesign.
Navigation changes. Pages move. Content gets consolidated.
Before launch, make sure links within the new website point directly to the new destination URLs, rather than relying on redirects.
Pay particular attention to links from:
- homepage
- main navigation
- service pages
- high-authority content
- popular blog posts
- location pages
- case studies
Internal linking helps users navigate the site and helps search engines understand relationships between pages.
9. Keep the staging website out of Google’s index
Your development or staging website generally shouldn’t appear in Google.
You don’t want Google indexing unfinished pages or duplicate versions of content that will eventually live on your main domain.
But this creates one of the biggest launch-day risks:
forgetting to remove the staging restrictions from the live website.
Before launch, check that the production website can actually be crawled and indexed.
Don’t assume somebody else has checked it.
Before Launch: Your SEO Migration Checks
This is the point where I’d run a proper pre-launch SEO review.
10. Crawl the staging website
Compare the new website against the old one.
Look for:
- missing pages
- incorrect URLs
- broken internal links
- missing metadata
- incorrect canonical tags
- accidental noindex tags
- missing headings
- redirect problems
- broken images
- missing structured data
It’s considerably easier to fix these problems before customers and search engines reach the new website.
11. Check your canonical tags
Canonical tags help indicate which URL should be treated as the preferred version of a page.
During development, it’s surprisingly easy for staging URLs, old domains or incorrect URLs to end up referenced in canonical tags.
Check them before launch.
A sitewide canonical mistake isn’t something I’d want to discover two weeks later.
12. Check robots.txt and indexation settings
Make sure you’re not accidentally blocking important sections of the new website.
Check:
- robots.txt
- meta robots directives
- password protection
- CMS visibility settings
- canonical tags
This is particularly important when moving a WordPress staging site into production.
13. Prepare your XML sitemap
Your XML sitemap should contain the new canonical URLs you actually want search engines to discover.
Don’t populate it with old redirects, 404s or staging URLs.
After launch, submit the new sitemap through Google Search Console.
Google provides specific guidance on building and submitting XML sitemaps.
14. Check mobile usability and performance
Don’t judge the redesigned site exclusively from a desktop monitor.
Test important pages on mobile.
Check:
- navigation
- buttons
- forms
- text size
- layout
- images
- interactive elements
- page loading
Google uses the mobile version of a site’s content for indexing and ranking, so the mobile experience isn’t an optional extra.
15. Check your forms and conversions
This one sounds obvious.
Yet it’s exactly the kind of thing that can get overlooked when everyone is concentrating on whether the new design looks right.
Test:
- contact forms
- consultation forms
- bookings
- checkout
- email links
- phone links
- thank-you pages
- confirmation emails
A gorgeous new website with a broken enquiry form isn’t ready to launch.
16. Check GA4, GTM and conversion tracking
SEO migration success shouldn’t be measured purely by rankings.
Before launch, make sure the systems you rely on to measure performance are correctly implemented.
For New Era Digital’s own redesign, this includes checking our tracking setup before the new site replaces the existing one.
Depending on your business, that may include:
Google Analytics 4 ✓
Google Tag Manager ✓
Google Search Console ✓
Form conversions ✓
Phone/email clicks ✓
Google Ads conversions ✓
E-commerce tracking ✓
If tracking disappears during migration, you create a hole in your data at exactly the time you most need it.
Would I Launch? Website Redesign Go/No-Go Checks
Not every small issue needs to delay a website launch.
But some absolutely should.
| Problem | My approach |
|---|---|
Sitewide noindex still active | Stop |
| Important 301 redirects missing | Stop |
| Main forms don’t work | Stop |
| Sitewide canonicals are wrong | Stop |
| Important pages are blocked from crawling | Stop |
| GA4/GTM isn’t tracking correctly | Fix before launch |
| Major mobile functionality is broken | Fix before launch |
| Minor cosmetic issue | Usually fix after launch |
| Unimportant retired URL returns 404 | Review, but not necessarily a launch blocker |
A deadline shouldn’t be the only reason a website goes live.
Launch Day SEO Checklist
Once the new site replaces the old one, I’d immediately check the essentials.
17. Activate and test your 301 redirects
Don’t simply assume the redirect file works.
Test important old URLs manually and crawl them at scale where appropriate.
Check that:
- old URLs redirect
- destinations are correct
- there aren’t unnecessary redirect chains
- important URLs don’t return 404s
- redirects aren’t looping
Google recommends keeping redirects associated with a site move in place for at least one year, and notes that keeping them longer can also benefit users.
18. Crawl the live website
Run another crawl after launch.
Your staging crawl told you what should happen.
The live crawl tells you what actually happened.
Look for:
- 404s
- 5xx errors
- redirects
- broken links
- indexability
- canonicals
- metadata
- sitemap URLs
19. Check Google Search Console
Make sure the correct property is configured and review it closely after launch.
Look at:
- indexing
- submitted sitemap
- crawl issues
- page performance
- search queries
- clicks
- impressions
If you’ve changed domains, there are additional site-move steps to follow.
20. Test tracking again
Yes, again.
Test your:
- GA4
- GTM
- conversions
- forms
- calls
- bookings
- e-commerce transactions
- Google Ads tracking where applicable
Something working on staging doesn’t guarantee it works in production.
After Launch: Don’t Assume the Job Is Finished
The first few weeks after launch matter.
21. Monitor rankings and organic traffic
Some fluctuation can occur as search engines crawl and process changes.
What you’re looking for is the pattern.
Don’t panic because one keyword moved two positions the morning after launch.
Monitor:
- important keywords
- organic landing pages
- Google Search Console clicks
- impressions
- conversions
- indexed pages
Compare them with the baseline you created before the redesign.
22. Monitor conversions, not just traffic
This is particularly important to me.
Suppose organic traffic drops 5%, but the redesigned website produces substantially more qualified enquiries.
That’s very different from losing 5% of traffic and 30% of leads.
Likewise, maintaining rankings isn’t much comfort if your conversion tracking has broken and you don’t know whether the website is generating business.
Look at the wider picture.
23. Check 404s and redirect problems
Continue monitoring for URLs that weren’t accounted for during migration.
You may discover:
- old URLs you missed
- external links pointing to old pages
- incorrect internal links
- redirect chains
- mistyped URLs
- deleted assets
Fix meaningful problems as you find them.
24. Monitor important page groups separately
Don’t rely on one overall organic traffic number.
Look separately at:
- service pages
- location pages
- product/category pages
- blog content
- high-value landing pages
If blog traffic is stable but your main commercial pages have fallen sharply, the overall graph can hide a significant problem.
Common Website Redesign SEO Mistakes
Here’s the condensed version of what I see as the biggest risks:
| Mistake | Why it matters |
|---|---|
| SEO is considered just before launch | Important structural decisions have already been made |
| Every URL is changed | Creates unnecessary migration risk |
| Old content is deleted without review | Rankings, traffic and backlinks can disappear with it |
| Everything redirects to the homepage | Poor relevance for users and search engines |
| Important content is heavily reduced | The new page may no longer satisfy the same search intent |
| Internal links still point to old URLs | Creates unnecessary redirects and weakens site structure |
Staging noindex carries onto live site | Important pages may disappear from search |
| Tracking isn’t tested | Leads and sales can become impossible to measure |
| Redirects aren’t tested | Mapping them isn’t enough — they need to work |
| Nobody monitors after launch | Problems aren’t identified until traffic has already fallen |
Will a Website Redesign Affect My Google Rankings?
It can.
But a ranking drop isn’t an unavoidable consequence of redesigning a website.
The risk increases when a redesign involves substantial changes to:
- URLs
- content
- site architecture
- internal links
- technical SEO
- domain
- CMS
That’s why I prefer to treat a significant redesign as an SEO migration project as well as a design project.
The objective isn’t necessarily to freeze the old website in time.
It’s to understand what has SEO value, protect it where appropriate and make intentional changes where the new website can genuinely be better.
What if rankings drop after the new website launches?
Start by diagnosing rather than immediately changing everything.
Check:
- Are the affected URLs indexed?
- Do the old URLs redirect correctly?
- Has important content changed?
- Are canonical tags correct?
- Are internal links pointing to the correct pages?
- Is Google crawling the new URLs?
- Were valuable backlinks pointing to URLs that weren’t properly redirected?
- Has search intent changed because of the redesign?
- Is the problem sitewide or limited to particular page groups?
- Are conversions actually down, or only rankings/traffic?
The answer determines the fix.
Website Redesign SEO FAQs
Should I change my URLs during a website redesign?
Only where there’s a good reason.
If an existing URL performs well and fits the new website structure, keeping it can reduce unnecessary migration complexity.
If you do change it, map the old URL to the most relevant new destination and implement an appropriate permanent redirect.
Do I need 301 redirects when redesigning my website?
If existing URLs are permanently changing, usually yes.
A 301 redirect tells browsers and search engines that the content has permanently moved to another URL.
Should I delete old blog posts during a redesign?
Not automatically.
Review their traffic, rankings, backlinks, relevance and quality first.
Some should stay. Some may benefit from updating. Others can be consolidated or retired.
That’s exactly the process I’m using during New Era Digital’s current redesign.
Should I redesign and change domain at the same time?
You can, but you’re introducing additional variables into the migration.
A domain change requires additional planning beyond a standard redesign, including Google’s specific site-move procedures.
How long should I monitor SEO after a redesign?
I’d monitor closely immediately after launch and continue comparing performance over the following weeks and months.
The exact timeframe depends on the scale of the migration and how quickly important pages are recrawled and processed.
Should my web designer handle the SEO migration?
That depends entirely on what’s included in their service and their SEO experience.
Don’t assume “website redesign” automatically includes keyword analysis, content auditing, URL mapping, redirect strategy, technical SEO, Search Console or post-launch SEO monitoring.
Ask exactly what’s included.
Want the checklist to keep?
Download my free Website Redesign SEO Checklist for a simple summary of the key checks to complete during your redesign.
Planning a Website Redesign?
A website redesign should give your business a better platform for growth — without unnecessarily sacrificing the search visibility you’ve already worked to build.
At New Era Digital, we approach SEO website design with SEO, website structure, UX, content, conversion and tracking considered together.
If you’re still working out your budget, read my guide to website design costs in Ireland.
And if you’re unsure what’s currently helping or holding back your search performance, you can also explore our SEO Audit services.
Or book a free 15-minute consultation to discuss your website redesign.
