A house extension is one of the most effective ways to create the space you need without the stress or cost of moving. At Mercer South, we specialise in bespoke house extensions across Hayling Island and Hampshire, helping families add light, space, and value to their homes. Whether you dream of a bright open-plan kitchen diner, an extra bedroom for a growing family, or a practical utility room, our experienced, family-run team brings the expertise to make it happen.
We know that every home and every family is different. That’s why our approach to a house extension is personal and flexible, tailored to your lifestyle and your property. From the first consultation, we take time to understand your vision and provide clear advice on design, planning permission, and building regulations. Our multi-trade team includes trusted builders, electricians, plumbers, and decorators, ensuring that every stage of the project is managed under one roof with consistent quality and attention to detail.
Based on Hayling Island, we work across Hampshire, including Portsmouth, Chichester, Southampton, and surrounding areas. Our local knowledge and strong supplier relationships mean we can deliver reliable service and competitive pricing without compromising on quality. Many of our clients come to us through recommendations, which we believe is the best sign of the trust and satisfaction we’ve built as a family-run company.
When you choose Mercer South for your extension, you’re choosing craftsmanship, reliability, and peace of mind. We manage everything from the groundwork and structural build through to finishing touches like flooring, lighting, and decoration. Our team keeps you updated throughout, so you feel confident and informed at every stage.
A well-designed extension doesn’t just add square footage — it transforms the way you live in your home. If you’re looking for a trusted building company on Hayling Island to deliver a seamless, high-quality extension, Mercer South is here to help. Get in touch today to start planning your project.