Your Last Redesign Cost 35,000 GBP And Lost You 40% Of Organic Traffic
The launch went live on a Friday. By Monday, Search Console was screaming. The agency went quiet for ten days, then sent a recovery plan that was just a PDF of the SEO checklist they should have shipped before launch. Three months later, traffic is still down 22%. The site looks great. The phone is not ringing. This page is the version of the redesign conversation you should be having before you sign the next agency contract.
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The redesign brief that fits — and the one that does not
The redesigns that work share three traits. The existing site has a real problem you can name in one sentence (Core Web Vitals failing across the catalogue, conversion rate dropped 20% on stable traffic, brand pivoted and the site is actively misrepresenting the business). The internal team can lock content before design starts (or has the budget to hire a copywriter to do it). The budget reflects the real scope (12-100k GBP for marketing sites; 30-150k for ecommerce). When all three are present, the redesign tends to ship on time and improve the numbers.
The redesigns that fail share two traits. The brief is "the design feels old" with no concrete underlying problem. Content gets written during build, scope expands, the timeline slides, and the team blames the agency. If your brief sounds like that, the conversation we need to have on the call is whether a redesign is the right answer at all — or whether a tighter refresh, or a content overhaul, or a paid-channel investment, would compound faster for the same money.
The four phases — what an honest redesign actually looks like
Discovery (2-3 weeks). Stakeholder interviews. Brand audit. Content audit — every page categorised retain / rewrite / retire. Performance benchmark of the existing site. Pull the URL list from Google Search Console plus Ahrefs plus the existing sitemap. Build the redirect map preview. The output is a written specification with stack pick, scope, three-phase price, and the redirect map version 1. Discovery weeks credit against the build if you proceed.
Design (4-6 weeks). Information architecture. Page-level design across priority templates. If the brief is bespoke (visual identity, custom illustration, motion specifications), this phase grows; if the brief is templated-with-strong-content, it shrinks. The design phase produces clickable prototypes and a complete design system, not just static mockups.
Build (6-10 weeks). Front-end development on the chosen stack — WordPress with custom theme for editorial flexibility, Next.js or Astro for performance-critical marketing sites. CMS configuration. Content migration with the redirect map locked. Build-time SEO linter wired into CI — fails the build on missing redirects, broken hreflang, schema regressions, or meta description out of bounds. The linter is the difference between a redesign that lands cleanly and a redesign that loses 40% of traffic for three months.
Launch + handover (2 weeks). Production cutover with documented rollback. Performance comparison of the top 100 URLs. Search Console resubmission. Editorial training for the in-house team. Documentation — design system reference, content model docs, runbook for common edits. Real handover; no "support hours" gate that turns small edits into agency upsells.
What separates this from /web-design-agency-london/ and /bespoke-web-design-london/
Three different conversations, often confused on agency websites. Web design agency in London is a geography page — answers "who do I hire to build my site if I am London-based?". Bespoke web design in London is a brand-tier page — answers "what does premium-brand custom design actually cost?". This page is the operational decision page — answers "I have an existing site, should I redesign it, and how do I do it without losing what I have?". If you are in the discovery phase before deciding to redesign at all, this page is the right starting point; if you have already decided to redesign and need an agency, the London pages are the next step.
Adjacent pages worth reading depending on your specific brief. Site migration if the redesign is a re-platform (WordPress → headless, or page-builder → modern stack). WordPress to Next.js migration if you have the specific WordPress-to-modern-stack brief. Programmatic SEO at scale if the redesign goal is to ship hundreds of templated pages.
The brief I will not take
Three categories. Redesigns where the underlying business has stopped growing and the team believes a new website will fix it — websites multiply business performance, they do not invent it. Redesigns where the budget is under 8,000 GBP for a 20+ page site — you will get templated work at custom-build prices, and either the agency loses money on you or quietly cuts corners. Redesigns where the timeline is "before the conference in 6 weeks" — anything done that fast for a real site is a refresh, not a redesign, and the team will be disappointed when the deliverable matches the timeline rather than the redesign-pitch ambition. The honest call on the call is the right call; we figure out which shape your brief actually fits.
Frequently asked questions
When is the right time to redesign a website?
Three honest signals. The site fails Core Web Vitals on most pages and a year of caching plugins has not fixed it. Conversion rate has dropped meaningfully (>15%) over the last 12 months on stable traffic, and the funnel diagnostic points at the site, not the offer. The brand has shifted (new positioning, new audience, new pricing) and the existing site is actively misrepresenting what the business does today. None of these is "the design feels old". Aesthetic refresh alone is the worst reason to spend 30,000 GBP on a rebuild.
How long does a website redesign take in 2026?
A 10-25 page marketing site redesign with proper discovery + design + build runs 10-14 weeks. A 50-150 page content site with custom post types and a real CMS runs 14-20 weeks. WooCommerce or Shopify Hydrogen redesigns run 16-24 weeks because of cart, checkout, and integration complexity. The variable that lengthens timelines most is content readiness — the redesigns that ship on time are the ones where content is locked before design starts, not the ones where copy gets written during build.
How do I redesign a website without losing SEO rankings?
Three rules, non-negotiable. Preserve every URL or 301 it to its new home — pull the URL list from Google Search Console, Ahrefs, and the existing sitemap, dedupe, map, ship as 301s in vercel.json or netlify.toml. Bridge Yoast or Rank Math metadata so titles, descriptions, and canonicals stay byte-identical post-cutover. Keep schema markup on every page; if you cannot ship the same schema types, ship better ones. The redesigns that lose rankings are the ones where one of these three was skipped — usually the redirect map, almost always under time pressure in the final week.
How much does a website redesign cost?
Honest 2026 pricing. A 10-15 page marketing site redesign on WordPress: 12,000-30,000 GBP. A 25-50 page redesign with custom post types and proper SEO transport: 25,000-60,000 GBP. A bespoke design + Next.js / Astro build for a premium brand: 40,000-100,000 GBP. WooCommerce redesigns start at 30,000 GBP and run to 150,000 GBP for headless commerce builds. The pricing range is wide because the discovery phase determines where in the range you land — content-locked, scope-locked briefs land at the bottom; expanding-scope projects land at the top.
Should I redesign or refresh? What is the difference?
A refresh keeps the existing CMS and site architecture, updates visual design, refreshes copy, fixes performance and SEO issues. Typical scope: 4-8 weeks, 6,000-20,000 GBP. A redesign rebuilds the site architecture, often migrates to a new stack (WordPress → Next.js, page-builder → custom theme), and treats content as a new spec. Typical scope: 10-20 weeks, 25,000-100,000 GBP. The diagnostic question: is the current site architecturally fit for the next 3-5 years (refresh) or is the existing build the problem (redesign)? If you answer "the build is the problem", refresh will fail.
How do you measure if a website redesign worked?
Four numbers, before and after. Lighthouse score on the top 10 highest-traffic pages (target: >85 mobile, >95 desktop). Core Web Vitals on field data via CrUX (target: 90% of page loads in green). Organic traffic 90 days post-launch versus 90 days pre-launch on the same URL set (target: stable or up; if down by more than 10%, the migration broke something). Conversion rate on the primary funnel (target: meaningful improvement; if not, the redesign solved the wrong problem). If you do not have baseline numbers for these before the redesign starts, you cannot tell whether the rebuild worked.
The next conversation
Bring three things to the call. Your current site URL plus a 90-day Google Search Console screenshot if you have it. The thing that is broken — slow pages, conversion drop, brand drift, agency stuck in limbo — described in one sentence. Your real budget range, not the negotiating opening. By the end of 30 minutes you will know whether redesign is the right shape, whether refresh is a better answer, and what the realistic price and timeline are for your specific brief.