The honest answer is "it depends on six tests"
A practice that already has a website is right to be sceptical of anyone who says it needs a new one. Some sites need replacing; many need three fixes; a few need nothing. The way to tell is not by how it looks but by what it does, and six tests on your own phone answer it in ten minutes.
The six tests
1. Booking. On your phone, from the home page, how many taps to a live appointment slot? One or two: pass. A form, a portal with an account wall, or "call us": fail.
2. Speed. Private window, mobile data. Does the main content appear in under two seconds? Check Search Console's Core Web Vitals report for Good on mobile. Over three seconds or Poor: fail.
3. Treatment pages. Search "[your top treatment] [your town]". Are you on page one with a page about that treatment? Does that page show what it involves, who does it, a price and a Book button? A single Treatments list: fail.
4. Prices. Can a stranger find what a check-up and hygiene visit cost within thirty seconds? "Contact us": fail.
5. Proof. Real photos of your team and practice, registration numbers, reviews near the booking button? Stock models: fail.
6. Tracking. Can your practice manager say how many bookings and enquiries the site produced last month, and from which pages? "Don't know": fail.
Reading the score
Six passes. You do not need a new website. Spend on photography, content and perhaps a care plan so it stays this way.
Four or five passes, and the failures are 4, 5 or 6. You need fixes, not a rebuild: a fees page, a photographer, tracking. A few days of work on a sound site.
Failures include 1 or 2. The site is losing patients at the two points that matter most. Whether that means fix or rebuild depends on what the site is built on:
- On a current WordPress theme or a framework, with content that is mostly right: fix. Wire in the booking system, do the speed work, add what is missing. A rescue project.
- On an old page builder, an abandoned theme, or a platform that cannot be made fast: rebuild. The speed test will not pass without it, and the treatment pages cannot be built as structured content on it.
Failure on 3 with a site that has no way to add a treatment page without a developer. Rebuild, because the fix is the structure, not the content.
The arithmetic behind the decision
A new private patient is worth a meaningful sum over their first two years at most practices. A site failing tests 1 and 2 loses a share of every month's visitors before they book. Estimate roughly: visitors per month from Search Console, times the share you lose to slowness (a fifth is conservative at four seconds), times your current conversion rate, times patient value. On most practice sites the annual figure is well above the cost of the fixes and often above the cost of a rebuild.
Then compare with what a rebuild costs at a fixed price. If the lost-patient figure exceeds the build cost within the first year, the site is not an expense you are avoiding; it is a leak you are paying for monthly.
When to leave it alone
- The practice is full and not seeking new patients.
- The site passes tests 1 and 2 and the others are minor.
- A merger, sale or rebrand is coming within a year; build after, not before.
- The budget genuinely is not there this year; fix test 1 (booking) and test 6 (tracking) cheaply, and revisit.
When a rebuild is the cheaper option
- The site is on a vendor's hosting with a monthly fee for a template you do not own. A rebuild in your name often costs less over two years.
- The site has been hacked, or is so far behind on updates that fixing it means rebuilding most of it anyway.
- Every change costs a developer hour because nothing is structured. The rebuild pays for itself in saved changes.
What a good rebuild preserves
If the answer is rebuild, it should keep every URL that ranks (or redirect it), reuse the good copy and photos, keep the domain and Google Business Profile continuity, and be measurably faster and better at tests 1 to 6 on launch day. A rebuild that loses rankings or changes the domain is not a rebuild; it is a restart.
Where this sits
The six tests are the first ten minutes of our diagnosis for a dental practice, and the written answer says fix, rebuild or leave, with the reasons and the numbers. About a third of practices that ask us for a new site are told they do not need one. The rest get a fixed-price build that is designed to pass the six tests from launch, because those are the six things the site is for.