Emergency call-outs
Leaks, burst pipes, no water, no heat. We aim to be with you inside 60 minutes — day or night, weekends and bank holidays included.
Engineer available now · ETA 38 min in HP1–HP3
Fixed properly.
First time.
On Call Plumbing works with vetted Gas Safe registered engineers covering Hemel Hempstead and the Home Counties. Honest, upfront work — same-day where possible.
- Gas Safe registeredfor all gas appliance work
- WaterSafe approvedcontractor scheme
- £5m public liabilitycover on every job
- DBS-checked engineersuniformed, ID on arrival
- Local since 2015based in Hemel Hempstead
Book a plumber
Tell us what's up and we'll call you back within 15 minutes.
Gas Safe registered
Every engineer certified for the appliances they work on
£5m public liability
Fully insured, every job, every engineer
Local engineer network
Vetted, uniformed, ID on arrival
What we fix
Domestic plumbing across the Home Counties
Gas-certified for boilers, water-safe for mains work, fully insured.
Boiler repair & service
Gas Safe engineers, every major brand — Worcester, Vaillant, Ideal, Baxi, Viessmann. Annual services, breakdowns, landlord certificates.
Leaks & burst pipes
Hidden leaks traced with acoustic gear and thermal imaging. Burst copper or plastic, tanked showers, under-floor heating leaks.
Drain unblocking
High-pressure jetting, CCTV survey, manhole access. Kitchen sinks, outside gullies, main sewer runs back to the boundary.
Toilets & bathrooms
New toilet fit, WC repair, cistern parts, overflow fixes. Full bathroom install on request — supply-and-fit or labour only.
Taps, valves & outside
Dripping taps, seized isolation valves, stopcock replacement, outside tap install, garden irrigation hookups.
How it works
Four steps, no surprises.
01
Boiler not firing
HP1 3LR · today
Tell us what's up
Book online in two minutes, or ring us — both land in the same dispatch system.
02
Live ETA
38 min
Tom · Van #4 · Watford → HP3
Callback in 15 minutes
An engineer confirms the job, gives you an arrival window, and sends a live ETA to your phone.
03
On-site check
Pressure tested
Fault traced
Plan agreed
Walked through with you
Diagnose & explain
On site we diagnose the fault, walk you through what's wrong and talk through the work needed before we start.
04
Job complete
Tested & signed off
Card payment
Email receipt
Fix, test, pay
Card or cash on completion. You get a proper invoice by email and a tidy job left behind.
We come to you
Real engineers. Real vans. Home Counties only.
Local Gas Safe engineers on the road between Hemel Hempstead and Milton Keynes. When you ring us, you speak to a real person and we get a vetted engineer to your door — fast.
- Typical arrival 45 minutes in HP / WD / AL
- Fully stocked vans — most repairs finished in one visit
- DBS-checked, uniformed, ID on arrival
Now on the road
T
Tom — Engineer #4
Watford → Hemel · ETA 12 min
Today's coverage
HP1HP2HP3WD17AL1LU2
Live dispatch
8 vans · 4 free
Call 07404 216065 to claim one
What customers say
What people say about us
G
"Burst pipe under the kitchen sink on a Sunday night. Had Tom on the doorstep in 40 minutes, sorted in an hour, exactly as discussed. Not a drop of drama."
G
"Boiler packed up two days before Christmas. Called at 9pm, engineer there by 10, new PCB fitted by midnight. Straight talking, clean van, proper paperwork."
G
"Used them for a bathroom refit and a separate drain unblock a month later. Same engineer, same standard of finish. Rare to find a trade you can actually rely on."
Where we cover
Based in Hemel Hempstead, working within 50 miles of HP1
Hemel HempsteadWatfordSt AlbansLutonAylesburyMilton KeynesBerkhamstedTringHarpendenCheshamAmershamRickmansworthDunstableLeighton Buzzard
Most HP, WD, AL, LU, MK and HA postcodes covered. Pop your postcode in the form — we'll confirm in the callback.
Questions, answered
The things we get asked the most
Are you really 24/7?+
Yes. An on-call engineer is rostered every night of the year, including Christmas Day. Out-of-hours work (after 8pm weekdays, Sundays, bank holidays) carries an out-of-hours uplift, which we'll explain on the call.
How fast can you actually get to me?+
Average response across the Home Counties is 45 minutes for emergencies. We'll give you a realistic arrival window in the callback — not a vague 'sometime today'. If we're ever going to be late we'll tell you straight away.
Do you charge a call-out fee?+
Yes — we charge a small call-out fee that covers the engineer's travel and time on site to diagnose the job. We'll always tell you the call-out fee on the phone before we set off, so there are no surprises.
Are your engineers Gas Safe registered?+
Every engineer doing gas work is Gas Safe registered. We're also WaterSafe approved for mains and cold-water work, and CIPHE members.
Do you cover my postcode?+
We cover most HP, WD, AL, LU, MK and HA postcodes. Pop your postcode into the booking form and we'll confirm in the callback.
Can I book online instead of calling?+
Yes — the booking form routes straight to dispatch in Hemel Hempstead. For genuine emergencies, calling 07404 216065 is still fastest.
Water where it shouldn't be?
Call us or drop your postcode in the form — we'll have someone with you before most firms pick up the phone.