How to Choose the Right Plumber in Orpington: 10 Questions to Ask Before You Hire

Hiring the wrong plumber costs more than money. It costs you damaged floors from a botched leak repair, a flooded ceiling from a poorly-fitted cylinder, an "easy fix" that becomes three return visits, or worst of all — work that actually breaches Building Regulations and creates problems for you when you sell your home.

I've seen all of these in homes across Orpington, Bromley, Sidcup and Sevenoaks where someone before me did the work badly. Most of those situations could have been avoided by asking a few simple questions before the plumber started.

Here are the 10 questions every homeowner in our area should ask before letting any plumber touch their pipework.

1. "Are You Fully Qualified?"

Plumbing isn't legally required to be a qualified trade in the UK — anyone can call themselves a plumber. But qualifications matter for safety, insurance, and quality of work.

Look for City & Guilds Level 2 (or NVQ) as the minimum. For specialist work like unvented hot water cylinders, G3 qualification is a legal requirement. For water regulations compliance, WRAS approval matters. Membership of the CIPHE (Chartered Institute of Plumbing and Heating Engineering) indicates ongoing professional development.

Ask to see proof. A genuine plumber will produce certificates without hesitation.

2. "Are You Fully Insured?"

This is non-negotiable. A plumber working in your home should carry:

• Public liability insurance — covers damage to your property if something goes wrong
• Professional indemnity insurance — covers professional advice and design errors

Without these, if a plumber floods your house, you're potentially the one paying for the repairs through your own buildings insurance — and your insurer may refuse to cover work done by an uninsured tradesperson.

3. "Will You Provide a Written Quote?"

A verbal quote is worth nothing. A written quote — even just a text or email — establishes:

• Exactly what work is included
• What parts are included
• Whether VAT applies
• Validity period
• What happens if the scope changes

If a plumber refuses to put their quote in writing, walk away. They're either not confident in their pricing or planning to add extras later.

4. "Do You Charge a Call-Out Fee?"

Call-out fee practices vary. Some plumbers charge a flat fee for arriving regardless of whether work happens. Others charge by the hour from arrival. Others (Smith EcoFlow included) charge nothing for arriving during normal working hours — you only pay for the work done.

Get clarity upfront. There's nothing wrong with charging a call-out fee as long as it's disclosed before you book.

5. "Can You Show Me Recent Local References?"

A plumber working locally will have recent customers nearby. Ask for 2–3 references from jobs in your area within the last 6 months. Genuine plumbers have these readily available — usually with photos.

Cross-check by looking at Google reviews for the business name. Look at the pattern: 30+ reviews over years, all genuine-sounding with specific job details, is far more credible than 5 reviews all posted in the same week.

6. "What's Your Specialism?"

Plumbing is a broad trade. Some plumbers are generalists who do a bit of everything. Others specialise — heat pumps, unvented systems, commercial work, bathroom installations.

For specialist work, hire a specialist. Asking a general plumber to service your Mitsubishi Ecodan heat pump is like asking a general doctor to perform brain surgery — they might know broadly what's involved, but they're not the right person for the job.

7. "Do You Provide Workmanship Guarantees?"

Quality plumbers stand behind their work. Ask:

• How long is the workmanship guarantee?
• What does it cover specifically?
• How quickly will you return if there's a problem?
• Is the guarantee in writing?

A plumber refusing to guarantee their work is telling you they don't expect their work to last. Walk away.

8. "Will You Be Doing the Work Yourself?"

For sole traders this is obvious — but worth confirming. For larger plumbing companies, you might be quoted by an experienced manager but the actual work done by an apprentice or subcontractor.

Ask who will be doing the work, what their qualifications are, and whether they'll be supervised. There's nothing inherently wrong with apprentice work — it has to start somewhere — but you should know what you're getting.

9. "How Will You Protect My Home?"

Plumbing work is messy. Pipework gets opened, water spills, dust gets created, fittings get swapped. A professional plumber arrives prepared:

• Dust sheets to protect floors and furniture
• Drip trays under work areas
• Shoe covers if walking through carpeted areas
• A plan for cleaning up afterwards

If a plumber's response is "I'll be careful" without specifics, expect a mess.

10. "What's Your Payment Policy?"

Genuine plumbers don't ask for full payment upfront for routine domestic work. Standard practice is:

• For small jobs (under ~£500): payment on completion
• For mid-size jobs: small deposit (10–25%) then balance on completion
• For larger projects: staged payments tied to progress milestones

Anyone asking for full upfront payment, demanding cash only, or refusing to provide an invoice is a red flag. You want a paper trail in case anything goes wrong later.

Bonus: Trust Your Gut

The plumber's coming into your home, often when you're not there. Beyond qualifications and references, you should feel comfortable with the person. If something feels off — they're evasive about questions, the quote keeps changing, they're pushy about starting immediately — listen to that instinct.

The Verdict

Hiring a good plumber in Orpington, Bromley or anywhere across South East London comes down to qualifications, insurance, transparency, and reputation. The 10 questions above filter out 95% of the bad ones. The remaining 5% you'll spot on instinct.

The good news: most plumbers in our area are honest, qualified, hard-working tradespeople. The questions above let you find the right one for your specific job — and avoid the small minority who give the trade a bad name.