Meet Lawrence Giandri: Your Local Heating Specialist
With over 20 years of hands-on experience in the heating and plumbing industry, I founded J&L Gas & Renewables to bring honest, reliable, and professional services to homeowners across Watford and Hertfordshire. My mission is simple: to provide the kind of service I would want for my own home.
As a local Watford business, I believe in combining old-school work ethics with modern heating technology. When you call J&L, you speak directly to me – not a call centre or an answering service. I personally oversee every job to ensure it meets my exacting standards, because my reputation depends on your satisfaction.
20+
Years Experience
Our Story
The story of J&L Gas & Renewables begins with a simple philosophy: that every homeowner deserves access to a tradesperson they can genuinely trust. After more than two decades working in the heating and plumbing industry, I had seen it all – the good, the bad, and unfortunately, sometimes the very bad. I saw customers overcharged for simple repairs, pressured into buying expensive equipment they did not need, and left with shoddy workmanship that created more problems than it solved.
I knew there was a better way. I founded J&L Gas & Renewables on the principles that had guided my own work throughout my career: honesty, quality, and genuine care for my customers. From the very beginning, my approach has been straightforward – treat every customer’s home as I would treat my own, provide honest advice even when it means recommending a less expensive option, and never compromise on the quality of workmanship.
Today, J&L Gas & Renewables serves homeowners across Watford, Bushey, Rickmansworth, St Albans, and throughout Hertfordshire and North London. Our reputation has been built one satisfied customer at a time, through word-of-mouth recommendations and the kind of service that makes people want to tell their friends and family. With a 4.93-star rating on TrustATrader from dozens of verified reviews, I am proud to say that our approach is working.
But we are not resting on our laurels. The heating industry is constantly evolving, with new technologies, regulations, and best practices emerging all the time. I invest in ongoing training and stay up-to-date with the latest developments to ensure that J&L Gas & Renewables continues to offer the best possible service to our customers. Whether you need a traditional boiler installation or want to explore renewable heating options, we have the expertise to help.
Our Values & Philosophy
At J&L Gas & Renewables, we believe that great service starts with great values. These four principles guide everything we do, from how we answer the phone to how we complete every job.
Quality Workmanship
Every job is completed to the highest standards with no shortcuts or compromises.
Customer Care
Treating every home as if it were our own, with respect, cleanliness, and care.
Reliability
When we say we will be there, we will be there. On time, every time, no excuses.
Honesty
Transparent pricing with no hidden costs, surprise charges, or pressure tactics.
Why Homeowners Choose J&L Gas & Renewables
In a world of faceless corporations and unreliable tradespeople, J&L Gas & Renewables offers something different. We are a local business run by a local person who genuinely cares about doing a good job. Here is what sets us apart from the competition:
Direct Communication
When you call, you speak to Lawrence directly. No call centres, no middlemen, no miscommunication.
Fixed-Price Quotes
Our quotes are transparent and detailed. The price we quote is the price you pay – no hidden extras.
Respect for Your Home
We use floor protection, clean up thoroughly, and treat your property with the care it deserves.
Honest Advice
We will never upsell you something you do not need. If a repair is more sensible than a replacement, we will tell you.
Guaranteed Workmanship
All our work is guaranteed. If something is not right, we will come back and fix it at no extra cost.
4.93
TrustATrader Rating
20+
Years Experience
500+
Happy Customers
20mi
Service Radius
Our Journey
From humble beginnings to becoming one of Watford’s most trusted heating and plumbing specialists, here are some key milestones in our journey.
Industry Beginnings
Lawrence began his career in the heating industry, training under experienced engineers and earning his Gas Safe certification.
Building Experience
Years of hands-on work on thousands of installations and repairs across Hertfordshire, developing expertise in all aspects of heating and plumbing.
J&L Gas & Renewables Founded
The company was officially established, bringing together two decades of experience to serve homeowners directly.
Trusted Local Expert
Over 500 satisfied customers served, with a 4.93-star TrustATrader rating and growing reputation across Watford and beyond.
Accreditations & Credentials
Your peace of mind is guaranteed with our industry-recognised credentials. We invest in proper training, maintain all required certifications, and carry comprehensive insurance to protect both you and your property.
Gas Safe Registered
Legally certified for all gas work to UK safety standards
TrustATrader Vetted
Verified reviews with 4.93/5 star rating
City & Guilds
Fully qualified and certified engineer
Admiral Insurance
Comprehensive public liability insurance
What Our Accreditations Mean for You
Gas Safe Registration is not optional – it is a legal requirement for anyone working on gas appliances in the UK. Our Gas Safe registration means that every gas installation, repair, or service we carry out is performed to strict safety standards, protecting your family from the dangers of carbon monoxide poisoning and gas leaks.
TrustATrader Verification provides an extra layer of confidence. TrustATrader vets all traders before they can join the platform and monitors customer reviews to ensure ongoing quality. Our 4.93-star rating comes from genuine, verified customers who have experienced our service firsthand.
City & Guilds Qualifications demonstrate that our technical knowledge has been independently assessed and certified. These qualifications cover everything from basic plumbing to complex heating system design and installation.
Comprehensive Insurance through Admiral protects you in the unlikely event that something goes wrong. Our public liability insurance covers any accidental damage to your property during our work, giving you complete peace of mind.
Services We Provide
From emergency repairs to complete heating system installations, we offer a comprehensive range of services to meet all your home heating and plumbing needs.
Boiler Installations
New boiler installations and replacements with up to 10 years warranty. All major brands supplied and fitted.
Boiler Repairs
Fast, reliable repairs for all boiler makes and models. Emergency callouts available for urgent breakdowns.
Annual Servicing
Keep your boiler running efficiently and maintain your warranty with our comprehensive annual service.
Central Heating
Full central heating installations, radiator upgrades, and system modifications to improve your home comfort.
General Plumbing
Complete plumbing services including leak repairs, tap replacements, toilet repairs, and pipe installations.
Bathroom Fitting
Professional bathroom installations and renovations, from plumbing through to complete fitouts.
Ready to Work With a Local Expert?
Whether it is a routine service, emergency repair, or a major installation project, I am here to help. Get in touch today for honest advice and a free, no-obligation quote. I look forward to hearing from you and showing you why so many homeowners across Watford and Hertfordshire choose J&L Gas & Renewables for their heating and plumbing needs.