Loft Conversions and Home Extensions Here at Clapham Construction Service we are Proud of our work across London. We simply care about the homes we build and the clients we build them for. We are a Local building service, that specialises in Loft Conversions and home extensions and undertaking these projects as a service and not just a contract. If a loft conversion in London or extension across the capital is what you want, or if you just simply want to see what you could get from the space you have, Clapham Construction Service can offer you the right advice and the design and build service you need. In addition to our bespoke Loft Conversions we operate a successful range of Home Extensions tailored for you, your home and your lifestyle We deliver a fully bespoke service, 100% accountability, honest advice, no sub-contracting, specialist works and a 10-year warranty for all our projects. Just look at our website and our client reviews.