Why Hiring Your First Engineer Is the Hardest Decision in Your Plumbing Business — and How to Get It Right

There comes a point in every growing plumbing business where you hit a wall. The phone keeps ringing. The diary is full. You’re turning down work because there simply aren’t enough hours in the day. You know you need help. But the idea of hiring someone fills you with dread.

What if they’re not as good as you? What if a customer complains? What if you can’t keep them busy? What if you can’t afford it?

These are real questions. And if you’re asking them, it means you’re at exactly the right moment to make the most important decision in your business. Because the difference between a plumbing business that stays small and one that genuinely grows almost always comes down to this: at some point, the owner stopped doing every job themselves.

The Solo Trap

Most plumbing business owners fall into the same pattern. They start out on their own, build a solid reputation, get busy — and then stay stuck. Not because there’s no work. But because every job runs through them. Every booking, every site visit, every invoice. They are the business.

The problem with being the business is that it has a ceiling. There are only so many hours in a day. And when you’re the only one generating revenue, taking a week off, getting ill, or simply slowing down means the income stops too.

Here’s a question worth sitting with: if you were unable to work for a month, what would happen to your business? For most sole traders in the plumbing and heating industry, the honest answer is that it would collapse. That’s not a business. That’s a job with more paperwork.

Why the First Hire Feels So Risky

The hesitation is understandable. You’ve spent years building your reputation. Your name is on every job. Your customers trust you because they know you. Bringing in someone else feels like handing over something you’ve worked hard to protect.

But here’s the thing: the risk of not hiring is just as real as the risk of hiring badly. Every week you stay solo, you’re capping your income, burning yourself out, and building a business that only works because of you personally. That is not something you can sell, scale, or step back from.

The fear of a bad hire is legitimate. But the answer to that fear isn’t to stay solo forever. The answer is to hire properly — with a clear process, clear expectations, and the right structure in place before they start.

Before You Hire Anyone

This is where most plumbing business owners get it wrong. They hire someone because they’re desperate — overworked, exhausted, turning down jobs — and then hand that person a set of keys and a van and hope for the best.

That’s a recipe for problems.

Before you bring your first team member on board, you need to be clear on three things.

One: what does the job actually involve? Not in general terms, but specifically. What types of jobs will they be doing? What quality standard do you expect? What does a completed job look like? If you can’t describe it precisely, you can’t train someone to do it.

Two: how will they represent your business with customers? Think about how you communicate on site. How you leave a property. How you handle a problem when something goes wrong. These things feel natural to you because you’ve been doing them for years. They are not obvious to someone new. Write them down.

Three: how will you keep track of what they’re doing? You can’t be on every job with them. So what’s your system for knowing that the work is being done to your standard? Job sheets, photos, end-of-day check-ins — whatever it looks like for your business, you need it in place before day one.

The Real Cost of Hiring

One of the biggest reasons plumbing business owners delay hiring is the financial fear. Taking on a team member is a commitment. Wages, van costs, insurance, tools. It adds up quickly.

But here’s how to think about it clearly. If a competent engineer generates £600 to £800 a day in revenue, and you’re paying them £200 to £250 a day in wages, the maths works — as long as you have enough work to keep them busy. The question isn’t whether you can afford to hire. It’s whether you have enough consistent work to justify it.

If your diary is regularly full and you’re turning down jobs, that question answers itself.

What Happens After You Hire

The first few weeks with a new team member will be uncomfortable. They won’t do things exactly the way you would. They’ll ask questions you think are obvious. There will be moments where you wonder if it’s worth it.

This is normal. Push through it.

The businesses that get this right are the ones that invest time upfront — training properly, setting standards clearly, being patient in the early stages. The ones that get it wrong are the ones who expect the new person to just figure it out, then blame the hire when things go wrong.

A well-structured onboarding process — even a simple one — makes an enormous difference. First day expectations. A checklist for each job type. A clear line of communication for when something goes wrong on site. None of this is complicated. All of it needs to be deliberate.

The Business You’re Building

Hiring your first team member isn’t just about getting more jobs done. It’s about building something that has a future beyond you. A business that can grow. A business you can eventually step back from. A business worth something.

That starts the moment you decide to stop doing everything yourself.

If you want a practical, step-by-step approach to building the systems and processes that make hiring and growth actually work in a trades business, The Systems Handbook is exactly that. Grab your copy here: https://amzn.to/45aMvUH (also available in hardcover: https://amzn.to/4pA1WiF)

Stop being the ceiling in your own business. Start building a team — and the structure to support one.