A site migration is the single riskiest project in SEO: change the domain, the CMS, the URL structure or the design, and you are effectively asking Google to re-learn your entire site overnight. Done well, it is invisible — traffic holds and even climbs. Done badly, it can wipe out years of rankings, and for a high-end real estate developer that means a collapse in qualified leads on listings worth millions. In Spain's competitive property market, where buyers search 'obra nueva', 'áticos de lujo' or 'villas en la Costa del Sol' before ever calling, losing that organic visibility is not a technical footnote — it is lost revenue. This guide walks through the mistakes that cause migrations to fail, so you can avoid every one of them.
The mistakes that doom a migration before launch
- Migrating without a full pre-launch benchmark: crawl the old site and export every URL, its traffic, rankings and backlinks, so you have a baseline to compare against and nothing gets forgotten.
- Changing too many variables at once — domain, design, CMS and URL structure in a single release — which makes any drop impossible to diagnose. Migrate in phases whenever you can.
- Forgetting to map every old URL to its closest new equivalent; an incomplete redirect plan is the number-one cause of lost traffic.
- Launching from a staging site that stayed open to indexing, creating duplicate content, or shipping the new site with a 'noindex' left on from testing.
- Ignoring high-value pages: your best-converting listings and neighbourhood landing pages deserve individual attention, not a blanket rule.
WARNING
The single most damaging mistake is redirect failure. Never point every old URL to the homepage — those are treated as soft 404s and pass almost no equity. Use permanent 301 redirects, one-to-one, from each old URL to the most relevant new page, avoid redirect chains (A to B to C), and keep the redirects live for at least a year. On a property site, a mis-redirected listing is a dead lead.
Treat the redirect map as the backbone of the whole project. Build it in a spreadsheet, old URL beside new URL, reviewed by both an SEO and a developer, and test it in staging before go-live. Preserve the pieces Google already trusts: keep page titles and on-page content where they still perform, migrate your image files and alt text, and carry over structured data — for real estate that means your listing, price, breadcrumb and organisation schema. The morning of launch, submit the new XML sitemaps in Search Console, update your internal links to point directly at the new URLs, and confirm your canonical tags reference the final destination, not the old address.
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Replatforming or redesigning your property site? FOCUS POINT plans and runs migrations that protect your rankings and your leads — redirect mapping, QA and post-launch monitoring included. Let's de-risk yours.
Plan a safe migrationDuring and after launch: the mistakes that erase your rankings
- Going dark on monitoring: not watching crawl stats, index coverage, 404s and rankings daily for the first month means small problems become disasters.
- Blocking the new site in robots.txt or leaving a global noindex from staging — always the first thing to verify at go-live.
- Forgetting to update or migrate your XML sitemap, hreflang tags and Search Console properties, especially painful on a multilingual Spanish/English property site.
- Neglecting Core Web Vitals and mobile rendering: a redesign that looks stunning but loads slowly on mobile will cost you both rankings and enquiries.
- Panicking at the first dip and reverting: a temporary fluctuation in the first weeks is normal — pull the redirect and log data before you touch anything.
- Not reclaiming lost backlinks: reach out to the highest-value referring domains and ask them to update their links to the new URLs.
DATA
Expect turbulence, plan for recovery. Even a well-executed migration typically sees a temporary fluctuation of a few weeks while Google recrawls and reassigns signals to the new URLs; a clean migration usually recovers within four to eight weeks, and often lands ahead of where it started thanks to a faster, better-structured site. A botched migration, by contrast, can bleed traffic for six months or more. The difference is almost never luck — it is the redirect map, the monitoring and the discipline to change one thing at a time.
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