How Plumbers Win Landlord and Letting Agent Work

Most plumbing is a stranger with a problem. You fix it, you get paid, and you both move on. Next week you start again from nothing.

Landlord work does not behave like that. It comes round on a fixed date, whether anybody feels like it or not, because a legal duty sits behind it. For a plumber trying to build something steadier than a phone that rings when it feels like it, that is the whole appeal.

Here is where the work actually is, what the law puts on the landlord, what an agent is really judging you on, and one popular service we would tell you not to bother selling.

Why this work repeats when nothing else does

A landlord has duties they cannot opt out of. The HSE guidance for landlords sets them out plainly, and the sentence worth reading twice is this one: landlords must only use a Gas Safe registered engineer for maintenance and safety checks on the gas equipment they provide for tenants.

Read that properly and it is bigger than a yearly certificate. The duty covers the maintenance and repair of the flues, the appliances and the pipework as well.

A landlord cannot have his brother-in-law look at the boiler. If you are on the register, every landlord in your town with a gas appliance is legally tied to somebody like you for the whole lot.

Those last three come from HSE’s page on gas safety records, and they are the reason your admin matters as much as your spanner work here. The landlord is the one on the hook for the deadline, but they cannot meet it until you have sent the thing.

Two customers who behave nothing alike

Plumbers lump these together and then wonder why one approach keeps failing.

The private landlord with one or two properties

This one behaves like a homeowner, because that is what they are. They search, they compare a couple of plumbers, they mind about price, and they are often doing it late because the certificate has nearly run out.

You win them the same way you win any domestic job: by turning up in the search when they look.

That is a local SEO problem, and we have written the do-it-yourself version in our plumber SEO guide. The only tweak is the words. They are not typing "plumber near me", they are typing the name of the paperwork they need.

The letting agent or property manager

Different animal entirely. Nobody is searching. One person is looking after a lot of properties, is chased all day by tenants and landlords, and wants the problem to go away.

They are not shopping on price the way a homeowner does, because a cheap plumber who does not answer the phone costs them more in aggravation than he saves in fees. They are buying reliability.

What an agent is actually judging you on

You do not need to guess at this. Work back from the duties above and it writes itself. The landlord has a legal clock running and an agent standing between them and the tenant, so what they need from you is speed and paper.

• You answer. Not eventually, and not with a voicemail that never gets returned.
• You go when you said you would, because the agent has already promised a tenant a morning off work.
• The certificate lands the same day, not when you next do your invoicing.
• Your paperwork is legible and consistent, so it can go straight into their file without being chased.
• One tidy invoice, not a running tab nobody can reconcile at the end of the month.

None of that is about plumbing. It is about being the easiest supplier on their list, and it is why an average engineer with good admin often keeps more agency work than a brilliant one without it.

This is also where a proper system stops being a luxury. If the annual checks sit in a diary that reminds you a month out, and the certificate goes out automatically the moment you sign the job off, you are doing the thing agents value most without thinking about it. That is what our booking systems are built to handle.

The service we would tell you not to sell

You will see plenty of outfits selling landlords a legionella certificate, sometimes implying it is a legal requirement like the gas check. Read what HSE actually says about legionella and landlords before you join in.

There is a genuine duty to assess the risk. But HSE is clear that most landlords can assess it themselves, and do not need to be trained or accredited to do so.

So a plumber selling compulsory-sounding legionella certificates to landlords is selling something the regulator says they can usually do without. You might get away with it for a while. You will not get a second call from an agent who checks.

There is honest work in the same area, and it is worth knowing the difference: actually sorting a system out, getting the hot water hot and the cold water cold and the dead legs off, is real plumbing that solves a real risk. Selling a certificate for a form somebody could fill in themselves is not.

What is coming, and how to talk about it honestly

The rules for rented homes are tightening, and it is fair to say so as long as you are accurate. The government’s roadmap for the Renters’ Rights Act 2025 confirms the direction: Awaab’s Law is to be extended to private rentals, bringing legally enforceable timeframes for making a home safe where there are serious hazards.

What the roadmap does not give you is a date. That extension is listed as still to be confirmed, subject to consultation, and the updated Decent Homes Standard for private rentals was consulted on in 2025 with a proposed start as far out as 2035 or 2037, responses still being worked through.

The useful way to use that with a landlord is not "you must act now". It is "this is heading one way, so the properties with a decent, documented maintenance history will be the easy ones". That is true, it is checkable, and it makes you sound like somebody who reads the guidance rather than somebody working off a script.

What your website has to do differently

A site aimed at homeowners will not win this work, because it answers a different question. A landlord or an agent is checking whether you are safe to hand a portfolio to.

• A page about landlord work, in their language, naming the certificate and the towns you cover. If no page says it, you cannot come up when they search it.
• Your Gas Safe registration number, printed in full, so it can be checked on the register in seconds rather than taken on trust.
• How fast you turn the paperwork round, said plainly. Almost nobody states this, and it is the thing an agent cares about most.
• Whether you can take on more than one property, because an agent is quietly working out if you would cope with twelve.
• A way to book or enquire that suits an office worker with a list, not just a big call button for a panicking homeowner.

That is a different set of pages and a different tone from the emergency-callout stuff, which is why we treat it as its own job when we do website design for plumbers. If you want the honest range of what a build like that costs, it is in our guide to plumber website prices.

What credibility looks like on a page

Joe Haywood is a one-man Gas Safe engineer in Barnsley with twelve years behind him and five stars on every review he has collected. On the site we built him his registration number is printed in full rather than hinted at, which means a landlord can look him up on the register before making contact.

He also covers everything from a boiler swap to a full bathroom, so a property manager is not juggling three trades for one flat. Neither of those is a marketing trick. They are just the two questions this customer was going to ask anyway, answered before they had to.

A sensible way to start

You do not need a portfolio of agencies by Christmas. You need a first one.

• Go back through your own customers and find the ones who mentioned a rental. Landlords rarely own just the one.
• Put up a single landlord page and make sure your registration number is on it.
• Pick five independent agents in your town, not the national chains, and get the property manager’s name.
• Do the first few jobs faster and tidier than the work strictly needs, because that is the audition.
• Once one agency trusts you, ask them who else they know. This is a trade that runs on quiet recommendations.

Questions plumbers ask about landlord work

How do plumbers get work from letting agents?

Usually by being easy to deal with rather than by being cheapest. An agent is juggling properties and chasing paperwork, so the plumber who answers, turns up when he says and sends the certificate the same day gets the next call. Introduce yourself to the property manager, not the branch, and make it obvious online that you already do this work.

Do you need to be Gas Safe registered to do landlord gas work?

Yes, and it goes wider than most people assume. HSE is explicit that a landlord must only use a Gas Safe registered engineer for gas equipment they provide, and that covers the maintenance and repairs, not just the annual check. If you are on the register, every landlord with a gas appliance is legally obliged to use somebody like you.

What is a CP12, and how quickly does the landlord need it?

It is the gas safety record, still widely called a CP12 out of habit. The landlord must hand a copy to sitting tenants inside 28 days of the check being done, and to any new tenant before they move in. So your paperwork is on a clock. Getting it over the same day is one of the simplest ways to become the plumber an agent keeps ringing.

Is landlord work worth it for a one-man plumbing business?

It suits a sole trader well, because the jobs are short, predictable and land on dates you can plan around. The trade-off is that agents expect responsiveness and tidy paperwork, and rates are often keener than private work. Many plumbers use it to fill the quiet weeks and keep the higher-margin domestic jobs as the main event.

Want a second opinion on your setup?

Drop us a message on WhatsApp and ask about the 10-point check. It costs nothing. We will look at whether your site would convince a property manager, whether you turn up for the searches landlords actually use, and what two or three changes would make the biggest difference.

If you would rather write it down, send us the details and tell us how much of your work is rented property at the moment.