A new website should improve how your business attracts and converts customers. Yet a poorly managed launch can remove hard-won search visibility, break enquiry forms, lose advertising data and leave prospective customers facing error pages. This UK website migration guide explains how to move a site without turning a commercial upgrade into a costly dip in traffic and leads.
A migration is not only changing a website’s design. It can involve moving to a new platform, changing your domain, restructuring pages, moving from HTTP to HTTPS, consolidating several sites, or rebuilding an existing site. Each change affects the routes that customers, search engines and marketing platforms use to find and measure your business.
Start with the business case, not the new design
Before development begins, be clear about what the migration needs to achieve. For one business, the priority may be more quote requests from mobile users. For another, it may be faster product management, stronger local visibility, improved accessibility or a site that integrates properly with a CRM.
Set practical measures of success before changing anything. These might include organic traffic to key service pages, rankings for commercially valuable terms, completed contact forms, telephone enquiries, online bookings, sales, or qualified leads by channel. A new site can look more professional and still underperform if its conversion journey is weaker or its tracking has not been carried over.
This is also the point to identify pages that genuinely matter. Your homepage is rarely the only valuable page. Long-standing service pages, location pages, blog articles, category pages and downloadable resources may each bring in relevant traffic. Removing them without a plan can reduce visibility for searches that produce real revenue.
Audit the existing website before moving it
Treat the current website as evidence, not as something to discard because it looks dated. A full audit creates the baseline you need to protect performance and prove whether the migration has delivered an improvement.
Record every live URL, its page title, meta description, heading structure, canonical tag, indexation status and internal links. Identify which pages receive organic traffic, earn links from other websites, generate enquiries or rank for terms that matter to your business. Also capture current conversion data, site speed, crawl errors and any redirects already in place.
For smaller brochure sites, a spreadsheet of every URL and its intended replacement may be enough. Larger ecommerce, membership or content-led websites need more detailed mapping, including filters, product variants, PDFs and archived pages. The principle is the same: every valuable old address needs a deliberate destination.
Do not rely on memory or assume that low-traffic pages have no value. A niche service page may produce only a handful of visits each month but still bring in high-value B2B enquiries. Likewise, a page with external links may support your site’s authority even if it is not a major traffic source.
Decide what should be kept, improved or retired
A migration is a useful opportunity to remove duplicate, thin or outdated content. However, retiring a page should be a business decision, not a tidy-up exercise.
Keep pages that have useful traffic, links, rankings or a clear role in the customer journey. Improve pages where the subject remains relevant but the copy, structure or calls to action are weak. Retire pages only when there is no suitable purpose for them, and redirect them to the closest relevant alternative where one exists.
Redirecting every removed page to the homepage is a common mistake. It gives customers little help and sends unclear relevance signals to search engines. If an old page for commercial roofing is replaced by a broader roofing services page, redirect it there. If there is no equivalent, a properly handled gone page may be more honest than an unrelated redirect.
Build a URL migration map before launch
The redirect map is one of the most important documents in a website move. It pairs each existing URL with its new destination and tells the server what to do when someone visits an old address.
Use permanent 301 redirects for pages that have moved for good. They help pass visitors and much of the accumulated search value to the new address. Redirects should be implemented at server level where possible, rather than relying on browser scripts or temporary workarounds.
A URL map also forces sensible decisions about site structure. Changing every page address simply because a new platform uses a different format creates unnecessary risk. Where an existing URL is clear, relevant and performing well, keeping it is often the safer option. New URLs make sense when the structure is genuinely confusing, duplicate content needs consolidating, or the business has changed its service offer.
Avoid redirect chains, where one old URL sends a visitor to another old URL before reaching the final page. They slow down the journey, complicate maintenance and can weaken the signals search engines receive. Each old URL should point directly to its final destination.
Protect technical SEO and lead tracking
A visually finished website is not necessarily ready to launch. Before going live, check the technical elements that allow search engines to crawl pages and allow your team to measure enquiries accurately.
The staging site must not be indexed. Once the live site is ready, remove any noindex directives or access restrictions that would stop search engines seeing it. Check the XML sitemap, robots.txt file, canonical tags, structured data and mobile presentation. Confirm that the preferred version of the domain is consistent, including HTTPS and whether you use www.
Then test the commercial essentials. Submit every form and check that notifications reach the right person. Test click-to-call numbers on mobiles, booking systems, checkout processes, downloads, live chat and CRM integrations. If you use paid advertising, make sure conversion tags, consent settings and destination URLs are correct before campaigns send traffic to the new site.
Analytics needs particular care. Keep the same measurement approach where possible so you can compare performance before and after launch. Set up key events for form submissions, telephone clicks, purchases, booking confirmations and other meaningful actions. Counting page views alone will not tell you whether the new site is producing better business results.
Test like a prospective customer
Your internal team knows how the business works. A first-time visitor does not. Ask someone outside the project to find a service, understand the offer and make an enquiry on a phone and a desktop device.
Look for hesitation points: unclear navigation, hidden contact details, long forms, vague calls to action, slow pages or content that answers general questions without explaining why the customer should choose you. A migration is a chance to improve credibility and conversion, not just to preserve rankings.
Launch in a controlled way
Choose a launch time when the people responsible for the website, development, marketing and customer enquiries can respond quickly. Avoid launching immediately before a bank holiday, major campaign or seasonal sales period unless there is a compelling operational reason.
As soon as the site is live, test the highest-priority URLs and redirects. Check the homepage, core service pages, location pages, contact page, forms, transactional pages and any pages used in paid campaigns. Look for broken images, mixed-content warnings, missing content, incorrect titles and accidental staging references.
Submit the updated sitemap through your search monitoring tools and request indexing for the most important pages where appropriate. Search engines need time to recrawl and process a new structure, so some ranking movement is normal. The aim is not to panic at every daily change, but to spot genuine faults before they affect weeks of enquiries.
Monitor performance after the migration
The first few days are for finding technical problems. The following weeks are for judging commercial performance. Review crawl errors, indexed pages, redirect behaviour, organic landing-page traffic, rankings, conversions and paid campaign results.
Compare equivalent periods rather than comparing a quiet week in January with a busy week in June. Consider seasonality, campaign changes and shifts in demand. If traffic falls, identify where it fell first. Is it limited to a section of the site? Are old URLs returning errors? Have important pages been excluded from search results? Has a tracking tag stopped recording leads?
Keep redirects in place for the long term. Customers may have bookmarked old pages, other websites may still link to them, and search engines can revisit them long after launch. Removing redirects after a few months simply because the project is complete can create avoidable dead ends.
A successful migration is measured by more than whether the website stayed online. It should leave your business with a clearer sales journey, reliable measurement and a stronger platform for future traffic and lead generation. Plan the move carefully, test the details that customers depend on, and use the launch as the start of ongoing improvement rather than the finish line.
