Simple, Secure, Reliable
G4hi.co.uk is a free, Trading Standards–approved consumer platform that guides households through their net-zero home improvement journey. Whether you’re applying for funding or choosing to invest in your home privately or your not quite sure, we provide a safe, simple and supported way to plan and manage your energy efficiency upgrades.
Our experienced team is here to support, guide and protect you at every stage of the process. We join the dots from the moment you register to explore options to the day your upgrades are complete, making the process simple, transparent and built entirely around your needs and objectives. As an approved service, you can expect a transparent, reliable and stress-free experience giving you confidence to make your home warmer, healthier and more energy efficient.
From insulation and heating upgrades to solar panels and ventilation, everything starts with your secure Application Dashboard. Here, you can track progress, explore upgrade options, receive step-by-step guidance, access expert support and make fully informed decisions about the best retrofit pathway for your home.
A word from our CEO
Charles May
G4hi.co.uk Founders: Charles and Kate May
At G4hi.co.uk, we believe that every household should have the opportunity to live in a warm, energy-efficient home — safely, affordably, and with confidence. Over the years, we’ve championed higher standards of workmanship, transparency, and consumer wellbeing in the home retrofit sector, advocating for reforms to the Energy Company Obligation and industry practices.
We warmly welcome the Labour Government’s Warm Homes Plan and its commitment to decarbonising UK homes. The plan’s focus on tackling fuel poverty while supporting households to achieve net-zero aligns perfectly with our mission: to make home energy improvements accessible, reliable, and effective for everyone.
Our approach is simple: put homeowners in control of their retrofit journey, ensure every job meets the highest standards, and provide guidance and support every step of the way. While most of what we do runs smoothly without intervention, we know that things don’t always go according to plan. That’s when having G4hi — and me personally — on your side makes all the difference. I can spot cowboy tradesmen and dodgy installers from a mile off, and we’ll back you up, protect your investment, and put you firmly in control of your home improvements.
At G4hi.co.uk, we don’t just deliver upgrades — we deliver confidence, choice, and a better future for your home and the planet.
We are nationwide
g4hi.co.uk provides expert support to households across the UK, whether you’re exploring your energy-efficiency options, applying for Government funding, or planning paid-for home improvements. From our base in Cornwall to cities like London, Birmingham, Manchester, and beyond, our experienced team is ready to guide you with professionalism and care. Putting your household at the centre of the equation at all times, we help you understand your choices, plan upgrades, and navigate the process with confidence—no matter where you are. g4hi.co.uk is your nationwide gateway to smarter, simpler, and fully supported home energy improvements.