📍 Serving Nairobi, Kiambu, Machakos & Greater Kenya
✉ info@cossyplumbing.co.ke 📞 0725 275 112
Est. 2015 — Nairobi, Kenya

Nairobi's Most Trusted Certified Plumbers

We're a team of certified, experienced plumbing professionals dedicated to delivering honest, reliable, and lasting plumbing solutions to homes and businesses across Kenya — 24 hours a day, every day.

📖 Our Story 👷 Meet the Team 📞 Get in Touch
🏅 Fully Certified & Licensed
⚡ 24/7 Emergency Response
🛡️ Insured & Guaranteed Work
📍 All Nairobi Areas Covered
⭐ 5-Star Customer Reviews
10+
Years of Experience
2,500+
Jobs Completed
12
Certified Technicians
24/7
Always Available
Cosmas, founder of Cossy Plumbing Services, on a job in Nairobi
10+
Years Serving
Nairobi
Our Story

Built on Honesty and Hard Work

Cossy Plumbing Services was founded in 2015 by Cosmas Ndung'u, a certified plumber who saw that Nairobi needed a plumbing company that combined genuine technical skill with honest, straightforward customer service. Too many homeowners were being overcharged or left with shoddy work that failed within weeks.

Starting with a single van and a commitment to doing every job right the first time, Cosmas built a reputation across Westlands, Karen, Lavington, and beyond. Word spread fast — reliable plumbers who turn up on time, quote fairly, and back their work with a guarantee were rare.

Today, Cossy Plumbing Services has grown into a team of 12 certified technicians covering all of Nairobi and surrounding counties, handling everything from emergency burst pipes at 2am to full bathroom installations for major commercial developments.

The founding values haven't changed: show up, fix it right, charge fairly, and stand behind the work.

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Who We Are

Our Mission, Vision & Values

Everything we do is guided by a simple belief: every Kenyan home and business deserves reliable plumbing and honest service.

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Our Mission

To provide Nairobi and Kenya with consistently excellent, affordable, and honest plumbing services — delivered by certified professionals who treat every customer's property with care and respect.

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Our Vision

To become Kenya's leading plumbing service provider — a company known not just for technical excellence, but for raising the standard of professionalism and reliability across the entire industry.

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Our Values

Honesty in every quote. Punctuality on every job. Quality in every repair. We don't cut corners, we don't overcharge, and we don't leave until the work is done right — every single time.

Our People

Meet the Cossy Plumbing Team

Certified, experienced, and genuinely passionate about great plumbing. Every technician is vetted, trained, and trusted.

Cosmas Ndung'u, founder of Cossy Plumbing Services
⭐ Founder & Lead Plumber
Cosmas Ndung'u
Founder — Lead Certified Plumber

Cosmas founded Cossy Plumbing Services in 2015 after over a decade working across residential and commercial plumbing projects in Nairobi. He holds full NCA plumbing certification and has overseen more than 2,500 successful jobs across Kenya. His hands-on approach and refusal to accept mediocre work are the reasons customers keep coming back — and keep referring their neighbours.

🏅 NCA Certified 🔧 10+ Years Experience 🏠 Residential Specialist 🏢 Commercial Specialist
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James Kariuki
Senior Plumbing Technician

Specialising in commercial plumbing and large-scale pipe installations, James brings 7 years of hands-on experience across hotels, office blocks, and residential estates across Nairobi.

🏅 NCA Certified
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Mary Wanjiku
Emergency Response Plumber

Mary leads our 24/7 emergency response team, specialising in burst pipes, sewer blockages, and flood damage. Known for calm, fast, and effective responses even in the most challenging situations.

🏅 Emergency Certified
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Peter Ochieng
Gas & Water Systems Specialist

Peter holds specialist certification in gas line installation and water treatment systems. He is the go-to technician for any project involving gas plumbing, boilers, or whole-home water filtration.

🏅 Gas Certified
Why Cossy Plumbing

Why Hundreds of Nairobi Families Choose Us

We don't just fix pipes. We build long-term trust with every household and business we serve.

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Fully Certified

Every technician holds current NCA plumbing certification. We don't cut corners on qualifications or safety.

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24/7 Availability

Plumbing emergencies don't wait for business hours. Neither do we. Real plumbers answer the phone at 3am.

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Transparent Pricing

We quote upfront before any work begins. No hidden fees, no surprise invoices, and no pressure.

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Guaranteed Work

Every job comes with a workmanship guarantee. If something isn't right, we come back and fix it — at no extra cost.

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Fast Response Times

Our team is strategically positioned across Nairobi for rapid deployment. Most emergency calls are attended within the hour.

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All Plumbing Types

Residential, commercial, industrial. Repairs, installations, preventive maintenance. One trusted team for everything.

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Fully Insured

All our work is backed by full liability insurance, giving you complete peace of mind on every job.

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Nairobi-Wide Coverage

From Westlands to Ruiru, Karen to Kasarani — we cover all areas of Nairobi and the surrounding counties.

Certified & Accredited

Our Certifications & Accreditations

We meet and exceed the professional standards required to operate safely and legally as a plumbing company in Kenya.

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NCA Certified

All technicians hold valid National Construction Authority (NCA) plumbing certification as required by Kenyan law.

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Fully Insured

We carry comprehensive liability insurance on all jobs — protecting your property and giving you total peace of mind.

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Gas Safe Registered

Our gas specialists are registered and certified to handle all gas line installations and repairs safely and legally.

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Business Registered

Cossy Plumbing Services is a fully registered Kenyan business operating transparently and in compliance with all regulations.

Our Journey

How Cossy Plumbing Grew

From one van in Westlands to Nairobi's most trusted plumbing team.

2015
Founded in Westlands
Cosmas Ndung'u launched Cossy Plumbing Services with a single van, a toolkit, and a commitment to fixing every job right the first time. Early clients in Westlands and Parklands quickly spread the word.
2017
Expanded to Commercial Clients
Word of reliable, honest service reached local businesses. The first commercial contracts were signed, covering restaurants and office buildings across the CBD and Upper Hill.
2019
Grew to a Team of 6
Demand grew beyond what one plumber could handle. The team expanded to 6 certified technicians, covering all Nairobi zones with structured emergency response coverage.
2021
Launched 24/7 Emergency Line
A dedicated around-the-clock emergency plumbing line was established, ensuring that no burst pipe or overflowing sewer in Nairobi would go unattended after hours.
2023
Expanded Across Greater Kenya
Service coverage extended to Kiambu, Machakos, Ongata Rongai, Thika, and Mombasa Road corridor, meeting demand from customers well beyond the city boundary.
Today
12 Technicians, 2,500+ Jobs Done
Cossy Plumbing Services is now a team of 12 certified plumbers with over 2,500 completed jobs, a 5-star reputation, and a promise that hasn't changed since day one: show up, fix it right, and stand behind the work.

Ready to Work With Nairobi's Best Plumbers?

Call us for a free, no-obligation quote — or send a WhatsApp message and we'll respond within minutes.

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