London's Trusted Emergency Plumbers
24/7 Service Across All 33 Boroughs.
At Semico Plumbers, we provide fast, reliable plumbing, heating, drainage, and leak detection services whenever you need them. Whether it’s a burst pipe, blocked drain, boiler breakdown, water leak, or gas emergency, our experienced engineers are ready to restore your home or business. We offer transparent pricing with one flat labour rate based on the time of day, no callout fees, and a fixed-price quote after our on-site diagnosis. Your comfort and safety are our priority, day or night.
30-60 MIN Response time
12 MO Workmanship guarantee
FULLY Insured & accredited
24/7 365 days a year
What We Fix
Expert Plumbers. Complete Plumbing Solutions.
From plumbing and heating to gas, drainage, and leak detection, Semico Plumbers provides complete property services across London. Our experienced, Gas Safe registered engineers deliver safe, reliable, and high-quality workmanship for residential and commercial properties. We also offer insurance claim support, planned maintenance, and tailored service packages—all under one trusted company.
Emergency plumbing
Burst pipes, hidden leaks, blocked toilets, blocked sinks, blocked baths, dripping or no-pressure taps, shower repair, mixer shower fits, low pressure diagnosis, water hammer, frozen pipe thaw, pump replacement, macerator (Saniflo) repair, washing-machine fits, stop-tap and outside-tap replacement.
Boiler repair & heating
No heat, no hot water, boiler error codes, pressure loss, pilot light out, cold radiators, balancing, radiator removal for decorating, TRV swaps, diverter and 3-way valve replacement, thermostat and programmer fits, power flush, frozen condensate pipe.
Drainage
Blocked drains, CCTV surveys and mapping, jetting and rodding, root cutting, drain relining (no-dig), manhole rebuild, soakaway failure, soil stack leaks, foul-water overflow, mains backflow, gutter and downpipe repair.
Leak detection
Trace and access without destruction: thermal imaging, acoustic listening, tracer gas. Ceiling leaks, shower tray leaks, bath leaks, underground supply-pipe leaks, damp surveys, pre-purchase plumbing surveys.
Gas safety / CP12
Gas leaks, gas pipe repair, emergency shut-off, Gas Safe inspections, CP12 landlord certificates, HMO multi-appliance LGSR, cooker and hob installations, gas fire service, carbon monoxide alarm install.
Boiler installation
New boiler upgrades, like-for-like combi swaps, system + cylinder builds, heat-pump cylinders, smart thermostats, full central-heating replacement, manufacturer-backed warranties up to 12 years.
Boiler service
Manufacturer-warranty-preserving boiler service. Fixed price, certificate by email same day. Worcester, Vaillant, Ideal, Viessmann, Baxi specialists.
Insurance claim handling
Insurance-grade reports at no cost, direct insurer liaison, full restoration on covered claims. You pay nothing out of pocket on insured work.
Account clients
Portfolio plans for estate agents, letting agents, property managers, multi-site landlords and commercial operators. Per-property discount, dedicated account manager, monthly compliance reports.
Honest Pricing
Three Pricing Options.
No Hidden Surprises.
At Semico Plumbers, transparency comes first. We provide clear pricing, written quotations before work starts, and no unexpected costs.
Simply choose the pricing option that best fits your plumbing, heating, or drainage needs, and we’ll take care of the rest.
Published from-prices
CP12 from £125. Annual boiler service from £125. CCTV drain survey from £349. Power flush from £489.
Published from-prices
CP12 from £125. Annual boiler service from £125. CCTV drain survey from £349. Power flush from £489.
Published from-prices
CP12 from £125. Annual boiler service from £125. CCTV drain survey from £349. Power flush from £489.
No callout fee. 24/7 emergencies are billed at the same hourly labour rate for the time of day, with a fixed-
price quote given on site after diagnosis before any chargeable work starts.
At Semico Plumbers, we believe in honest and transparent pricing. Our domestic service rates include VAT, with no hidden extras or unexpected fees. Every invoice provides a clear breakdown of labour and materials, ensuring complete transparency. We also offer discounted pricing and customized maintenance plans for commercial and account clients.
Why Choose Semico Plumbers
When minutes matter, we're already on the way.
Semico Plumbers is a trusted team of experienced plumbing and heating professionals dedicated to providing fast, reliable, and high-quality services across London. Our qualified and fully insured engineers are trained to handle every job with precision, ensuring the problem is diagnosed accurately and fixed efficiently the first time. We believe in honest communication, transparent pricing, and exceptional workmanship, giving you complete confidence from start to finish.
- 30 to 60 minute target response across M25 postcodes, typically faster in zones 1 to 3, subject to availability and traffic
- Gas Safe registered, every job done compliantly
- Fixed-price quotes on site, no work proceeds without your written approval
- 12-month workmanship guarantee, manufacturer warranties on parts
- Transparent pricing, no surprises on the invoice
Some of our recent work.
Every photo showcases actual work completed by the Semico Plumbers team. From our fully equipped service vehicles to our experienced engineers, what you see on our website is exactly what you can expect when we arrive at your property. No stock images—just genuine workmanship, trusted professionals, and reliable service across London.
Real engineers · real vans · real London
Trusted Professionals. Reliable Service. Every Time.
When you choose Semico Plumbers, you can expect a professional, reliable, and consistent service every time. Our experienced engineers arrive fully equipped to handle the job efficiently, delivering high-quality workmanship with attention to detail. From your first call to the completion of the work, our dedicated team is committed to providing honest communication, dependable service, and complete customer satisfaction across London.