Forty of the right names is worth more than four thousand of the wrong ones

Your work does not come from repeat purchase. It comes from recommendation — from architects, structural engineers, estate agents, planning consultants, kitchen and bathroom firms, and from people who have already had you in and are asked about you at the school gate.

That is a small group. In most towns it is forty to a hundred and twenty organisations and individuals, and every one of them is capable of sending you a £19,450 job. An architect specifying two extensions a year is worth more than your entire past customer base put together, and unlike a homeowner they buy again every few months for the rest of their career.

So the list is built the other way round. Not everyone who ever paid an invoice, but everyone who could put your name in front of somebody about to spend twenty thousand pounds. Past clients belong on it too — not as buyers, but as the most credible referrers you have.

A quarterly project note to the professional list. One job, done properly. What the brief was, what was structurally awkward, how the planning went, what it cost, three photographs. Written so an architect can forward it to a client and say these are the people I’d use. Four of those a year is the entire programme, and it is far more effective than anything monthly.

A completion note to the client, and a separate one to the street. The month after a build finishes is when the neighbours are most curious and most likely to ask. A short, plain email to the client — thanks, here is the sign-off paperwork, here is what to expect in the first winter — with a line offering to answer anything a neighbour asks.

A planning and regulation update, twice a year. Permitted development rules, building regulation changes, party wall practice. Architects and agents genuinely read this because it affects their advice, and being the builder who tells them is worth a great deal.

A capacity note. Two or three times a year: what your programme looks like, when you next have a slot. Professionals plan months ahead, and a builder who tells them about an open slot is enormously easier to specify than one they have to ring and ask.

The warm dormant note. People who got a quote, said “next year”, and meant it. One email a year, no pressure, asking whether the plan is still alive.

Emailing past clients as though they will buy again. They will not. Email them as the referrers they actually are, and the tone changes completely.

Monthly sends. Nobody in this trade has twelve things a year worth saying. Four properly written notes beat twelve thin ones, and they get opened.

Writing about the business instead of a building. “We are pleased to announce” is where a builder’s email goes to die. One job, one story, three photographs.

Never asking an architect what they need. Most of them want a builder who prices honestly and turns up when the drawings are ready. Say that you do, and show a job where you did.

Quotes that did not convert stay on the system with a date against them, so the dormant list is a query rather than a memory. In a trade where a decision routinely stalls for a year, that is where most of the recoverable money sits.

Job records hold the photographs, the dates and what actually changed on site, so a project note is assembled from work you did rather than written from scratch months later.

And because contacts can be marked as referrers rather than customers, the professional list stays separate from everyone else — which is the whole argument of this page, made mechanical.