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.
Frequently asked.
Yes. Semico Plumbers offers 24/7 emergency plumbing services across London. Our experienced engineers are ready to respond quickly to urgent plumbing, heating, and drainage issues.
We provide a full range of services, including emergency plumbing, leak detection, drain cleaning, boiler repairs, heating services, pipe repairs, bathroom plumbing, and general plumbing maintenance.
Yes. Our engineers are experienced, fully trained, and committed to delivering safe, reliable, and professional plumbing solutions.
Yes. We offer transparent, no-obligation quotations before any work begins, so you know exactly what to expect.
No. We believe in honest pricing with no hidden fees. All costs are clearly explained before work starts.
Our team aims to respond as quickly as possible. Response times may vary depending on your location and current demand, but we always prioritize emergency call-outs.
Yes. We provide professional plumbing and heating services for both residential and commercial properties throughout London.
We accept major debit and credit cards, bank transfers, and other convenient payment methods.
Yes. You can contact us by phone, email, or through our online contact form to schedule an appointment at a time that suits you.
We are known for our fast response times, experienced engineers, transparent pricing, quality workmanship, and commitment to excellent customer service. Your satisfaction is our top priority.
Londen Experties
Why London needs a specialist
plumber.
Every property has unique plumbing requirements, and no two jobs are ever the same. From historic homes to modern apartments and commercial buildings, each property presents its own challenges. At Semico Plumbers, our experienced engineers have the knowledge and expertise to diagnose issues accurately and provide reliable, long-lasting solutions. That’s what sets us apart and makes us a trusted choice for plumbing, heating, and drainage services across London.
Hard water on the chalk aquifer
Many properties across London are affected by hard water, which can lead to limescale buildup in boilers, pipes, taps, showers, and household appliances over time. At Semico Plumbers, we take these conditions into account with every installation and repair. Our experienced engineers use high-quality materials, follow industry best practices, and recommend the right solutions to improve system performance, extend equipment life, and help prevent future plumbing issues.
Period property pipework
London properties feature a wide variety of plumbing systems, from older homes with traditional pipework to modern buildings with advanced plumbing installations. At Semico Plumbers, our experienced engineers are equipped to work with a broad range of plumbing materials and systems. We arrive prepared with the essential tools and quality components needed to complete most repairs and installations efficiently, helping reduce delays and restore your plumbing as quickly as possible.
Mains pressure surprises
Water pressure can vary from one property to another, affecting the performance of your plumbing and heating systems. At Semico Plumbers, we carefully assess your property’s water pressure before recommending or installing any solution. Our experienced engineers ensure that every installation and repair is tailored to your property’s specific requirements, helping improve efficiency, reliability, and long-term performance.
Conservation areas
Many London properties are subject to specific building regulations and installation requirements, particularly in older or protected areas. At Semico Plumbers, our experienced engineers carry out all work in accordance with current industry standards and applicable regulations. We carefully assess each property to ensure every installation is completed safely, professionally, and with attention to local requirements where applicable.
Block management protocols
Whether you’re in an apartment, office, commercial property, or residential home, Semico Plumbers is committed to providing a smooth and efficient service from start to finish. Our experienced engineers arrive prepared to carry out the work professionally, minimizing delays and ensuring every project is completed safely, efficiently, and to the highest standards.
Drainage networks
Drainage systems can vary from one property to another, making accurate diagnosis essential before any repair work begins. At Semico Plumbers, we use modern inspection methods to identify the source of drainage issues and recommend the most effective solution. Our thorough assessments help avoid unnecessary work, reduce costs, and ensure repairs are completed efficiently and correctly the first time.
Tree-root infiltration
Tree roots and underground debris can gradually damage drainage systems, leading to blockages, leaks, and costly repairs. At Semico Plumbers, we use advanced drain inspection techniques to accurately identify the cause of the problem before recommending the most effective solution. Whenever possible, we use minimally disruptive repair methods to restore your drainage system quickly while reducing unnecessary excavation and damage to your property.
Subsidence-prone London Clay
Underground plumbing and drainage systems can develop wear and damage over time due to changing ground conditions, aging pipework, and everyday use. At Semico Plumbers, we recommend routine inspections and CCTV drain surveys to identify potential issues before they become major problems. Early detection helps reduce repair costs, protect your property, and keep your plumbing system operating efficiently for years to come.