Site Redesign SEO Checklist

How I’d prioritise

Crawl and inventory your current site before making any changes.
Map 301 redirects for every URL that has traffic, backlinks, or is indexed.
Block staging from indexing and test everything in a sandbox.
Update XML sitemap, robots.txt, and canonical tags at launch.
Monitor crawl errors, rankings, and traffic for at least two weeks post-launch.

What I'd do first

Crawl the current site with a tool like Screaming Frog and export every URL, status code, meta title, meta description, and internal link.
Pull baseline data from Google Search Console and Google Analytics: organic traffic, clicks, impressions, CTR, and top landing pages.
Identify your top 20–50 performing pages — these are the ones you absolutely cannot break.
Decide for each page: keep, re-optimize, merge, remove, or redirect.
Build a redirect map before you touch a single line of code.

The list

How I prioritize

I rank tasks by risk to existing traffic. First, protect your top pages — those with the most organic traffic, backlinks, or conversions. Then handle the rest. Redirect mapping is non-negotiable: every URL that has any search presence needs a 301. After launch, I watch Search Console like a hawk for the first week — any spike in 404s or drop in impressions gets fixed same-day.

What I got wrong

I once launched without a full redirect map and lost 30% of organic traffic for three months. Don't be me.
I forgot to update internal links in old blog posts, so users hit a redirect chain instead of the new page.
I left staging indexed by accident — Google saw duplicate content and ranked the wrong version.
I assumed post-launch monitoring could wait a week. It can't. Crawl errors compound fast.

Next step

SEO AuditRun a full technical audit before you start the redesign to catch hidden issues.

Quick answers

How long should I monitor after a redesign?

At least two weeks, but ideally a full month. Crawl errors, ranking fluctuations, and traffic drops often appear within the first few days, but some issues take longer to surface.

Do I need to redirect every old URL?

No, only the ones that have traffic, backlinks, or are indexed. Use a 301 redirect to the most relevant new page. For low-value or deleted pages, a 410 Gone is cleaner than a soft 404.

Where to go next

More from Site ops

A step sideways

Sources

Primary documentation is linked directly. Anything commercial is marked nofollow.

Google Search Central — Best primary source for crawling, indexing, redirects, sitemaps, canonicalization, and migration-related technical guidance.
Search Engine Land — Practical redesign checklist covering baseline capture, crawling, redirect planning, staging, and post-launch monitoring.
SEOptimer — Clear step-by-step checklist focused on redirects, content inventory, staging audits, and launch monitoring.
HubSpot — Useful overview of redesign SEO tasks, especially content preservation, redirects, architecture, and sitemap updates.