When optimization is enough
If your current site is on WordPress, Webflow, Shopify, or any modern CMS, can be edited freely, supports custom code injection (for schema), and passes basic Core Web Vitals, you can almost always grow rankings on the existing site for less money than a rebuild.
A typical optimization-first engagement spends 3–6 months fixing technical issues, expanding content, and improving conversion design before touching the underlying build.
When a rebuild is necessary
Built on Wix Classic, GoDaddy Website Builder, or other locked-down platforms with no access to robots.txt, schema, or server-side rendering control.
Critically slow LCP (8+ seconds) caused by deep architectural issues — heavy JavaScript frameworks loading client-side without SSR, monolithic CSS, or unoptimizable image pipelines.
Site architecture forces important content to live behind logins, forms, or JavaScript-only navigation that Google can't crawl.
When a rebuild does happen, plan a careful migration: 301 every URL to its new equivalent, preserve content depth, audit internal linking, and submit a new sitemap immediately.