How to write a case study that wins work

A review tells someone you did a good job. A case study does something more useful: it shows a person who was in exactly the position the reader is in now, and what happened to them. That difference is why one line of a good case study can do more than twenty five-star ratings — the reader is not being told you are good, they are watching someone like them decide.

The part everyone gets wrong

Most case studies open with the finished result and a photograph of it. The reader admires it and feels nothing, because they are not standing in a finished kitchen. They are standing in a broken one, worried about cost and mess and whether the person will turn up.

So the useful case study spends its first third on the starting position — the problem, the worry, what they had already tried, why they hesitated. That is the bit the reader recognises. Everything after it only matters because they recognised themselves first.

If you take one thing from this: the before is more persuasive than the after.

The structure

1. Who they were. Enough to be recognisable — a family in a 1930s semi, a café doing eighty covers a day. Not their life story.
2. What the problem was, and what it was costing them. Money, time, stress, embarrassment.
3. Why they hesitated, or what worried them about getting it done. The most valuable and most skipped part, because it is the reader's own hesitation said out loud.
4. What you did. Plainly, including anything unusual you had to solve.
5. What happened, as specifically as you can honestly be.
6. What they said. Their words, not tidied up.
7. One next step for the reader.

Six hundred words is plenty. A case study nobody finishes persuades nobody.

Specific beats impressive

"We transformed the space" is worth nothing. "Three days, and they kept using the bathroom every evening" is worth a great deal, because it is checkable and it answers a real fear.

Reach for specifics wherever they exist: how long it took, what it cost or the range, what was found on the way, what changed afterwards. A number a reader can picture beats an adjective every time.

And be careful with claims you cannot show. "Their sales doubled" is a strong sentence and a weak one if you cannot say how it was measured — a reader who doubts one line starts doubting the rest. Where you cannot evidence something, say what you actually know: what you did, what the customer reported, and over what period. Honest and modest is more persuasive than impressive and vague.

Ask permission properly

Ask, clearly, and be specific about where it will appear and what will be named. Most customers say yes and are pleased to be asked.

• Offer them a version without their name — "a family in Guiseley" works nearly as well and removes most objections.
• Ask separately about photographs, especially inside a home. Permission to be quoted is not permission to publish pictures of their house.
• Show them the draft. It takes one email, it prevents the awkward version of this, and people frequently improve their own quote when they see it written down.
• Get it in writing, even one line in a text message. Keep it.

For a business customer, ask who has to approve it. Assume it is not the person you dealt with.

Getting a usable quote

"Really happy with the work, thanks" is not a quote. It is politeness.

The way to get a real one is to ask specific questions and let them answer normally:

• "What were you worried about before you called anyone?"
• "What made you go with us rather than the other quote?"
• "What has actually changed since?"
• "What would you say to someone in the same position?"

Ask those and the answers arrive quotable. Then leave them roughly as spoken. A quote polished into marketing language stops sounding like a person, and sounding like a person is the whole value.

Photographs

Before, during and after — and the before is the one everybody forgets. Take it before you start on every job, even the dull-looking ones, because you cannot go back for it. Photographing your own work covers the practical side.

One during-the-work photograph is worth several finished ones. It proves a real person did it rather than a stock library.

Where to put it

• Its own page on your website, linked from the relevant service page. Not buried in a blog list.
• In your quotes. One line and a link, in the email that carries a price, at the exact moment someone is deciding. This is the highest-value place and almost nobody does it.
• As several posts, not one — the before, the problem, the result, the quote. One job, several posts.
• In replies to enquiries, when someone describes a problem you have solved before.

How many you need

Three or four good ones, covering the kinds of work you actually want more of. Not twenty.

The useful test: could a reader find one that matches their own situation? A bathroom fitter wants a small en-suite, a full refit, and an awkward-access job — because those are the three enquiries they get. Coverage of the real cases beats volume.

Refresh one a year. An entire page dated four years ago quietly says something you did not mean.

The bottom line

Spend the first third on the starting problem and the hesitation, because that is where the reader recognises themselves. Be specific rather than impressive, and never claim a result you cannot evidence. Ask permission properly, get the quote by asking four specific questions, take the before photograph on every job, and put the finished thing in your quote emails where it does the most work. See also getting more reviews.