"We need a new website" is usually a feeling, not a metric. That's fine — feelings start projects. But they don't justify budgets, so let's talk about the numbers.

Across the projects we've shipped since 2018, three metrics move consistently after a rebuild. Two of them surprise people.

1. Conversion rate: the headline number

Median lift in enquiries or checkouts: 2–4× in the first 90 days.

The mechanics are boring and reliable: faster load, clearer hierarchy, one message per page, and a next click that's obvious. None of it is magic. The old site leaked at specific points — the redesign plugs the biggest leak first, then the next.

2. Speed: the quiet multiplier

Median LCP drop after rebuild: 2.5–5× faster.

Nobody asks for speed. It just arrives when you stop adding plugins, compress images properly and lazy-load the heavy stuff. Then it quietly multiplies everything else: bounce rate, rankings, ad spend efficiency.

3. The one nobody expects: operational time

Median time for a marketing team to publish a page, before vs after: a day → an hour.

This is the metric that actually pays for the project. If your team spends two days a month fighting the CMS, a rebuild pays for itself in salaries long before it pays for itself in sales. Agencies rarely mention it because it's harder to put in a case study — but it's the one your CFO should hear.

The uncomfortable chart

Not every redesign works. About 1 in 6 projects we're asked to fix were themselves a redesign that underperformed. The pattern is almost always the same:

  • Rebuilt for the wrong audience ("the board liked it")
  • Speed regression from the builder of choice
  • The same content problems, now in a prettier wrapper

A redesign that preserves the old site's mistakes is a rebrand of the problem.

What predicts a successful redesign

From the projects that hit their numbers:

A metric agreed before design. Not "we want it to feel premium" — "we want 30% more demo requests." Everything is judged against it.

The old site was measured first. Analytics, heatmaps, the actual leaks. You can't fix what you haven't profiled.

Content was rewritten, not carried. The redesign is the only time you'll rewrite copy cheaply. Waste it and you ship the old voice in new clothes.

The honest ROI math

A business website rebuild from $699 that lifts enquiries 3× pays for itself inside a week, in most service businesses. That's not hype — it's arithmetic on your own numbers, which is the first thing we do before quoting anything.

Ask an agency for their before numbers, not their after ones. The before is where the honesty lives.