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A 38 → 94 Lighthouse jump that turned a slow site into a lead engine

ResultsXL rebuilt ACA Plumbing & HVAC on Next.js, cutting load time from 8.2s to 0.9s and lifting Lighthouse from 38 to 94 — with the SEO and AI-search infrastructure to match.

38 → 94
lighthouse performance
8.2s → 0.9s
load time
9x
faster pages

The challenge

ACA’s old website took 8.2 seconds to load on mobile and scored 38 on Lighthouse. Every slow page was a customer bouncing to a competitor before the phone number ever rendered.

What we did

  • Full Next.js 15 rebuild with image optimization and edge delivery.
  • Complete SEO infrastructure — schema, metadata, sitemap, and clean URLs.
  • AI-search readiness: llms.txt, JSON-LD, and semantic HTML for citation.
  • Every legacy URL mapped to a 301 redirect — zero lost backlinks.

The outcome

The rebuilt site loads in under a second and scores 94 on mobile. Faster pages, cleaner structure, and AI-ready content turned a liability into the strongest lead channel in the business.

The new site is night and day. It loads instantly and we’re getting more calls than we ever did before.

Mike R., Owner, ACA Plumbing & HVAC

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