Welcome to SB Builds SB Builds is the builder with the knowledge, experience and skills to provide you with the best quality house extension. If you love your existing home, but have outgrown it, why not consider extending? House extensions allow you to expand or improve on the home you already love. Adding an extension can be much more cost efficient, and adds value to your existing property. Our home extensions team provides you with full service from construction to completion. We aim to make you extension process as simple and non-disruptive as possible, so that you and your family can continue with your day-to-day lives. Our project manager keeps you informed throughout the full building process, so that you are never left second-guessing. We always strive to complete your home extension project on time and on budget – no nasty surprises!