You're getting traffic. People are finding the site, landing on a page, doing something — but the enquiries aren't coming, or not enough of them, and it's tempting to conclude the problem is the website itself: that it needs to look better, feel more premium, be rebuilt from scratch.
Before reaching for a redesign, it's worth being specific about where things are actually breaking down. A visitor's path from arriving on your site to sending an enquiry passes through several distinct stages — they need to understand what you offer, believe you can deliver it, see an obvious next step, and be able to take it without friction. A website can fail at any one of those points while everything else about it works perfectly well.
What follows are seven of the most common places that journey breaks, roughly in the order a visitor experiences them. None of them assume you need a new website — some of the fixes below are a headline, some are a form. Occasionally the underlying problem really is structural, and there's a way to tell the difference later in this piece.