Coste Casa

Coste Casa is a construction company based in Sant Pere de Ribes (Barcelona), specialized in building passive prefab homes and premium full-home renovations throughout Catalonia, including the Garraf, Alt/ Baix Penedès and Baix Llobregat regions. We only take on 3 custom home projects per year, allowing us to give each one our full attention. We ensure high-quality execution, precise planning and total transparency — no surprises, no delays. Every house is built as if it were our own. We follow the Passive House standard, combining modern prefab structures with maximum energy efficiency — up to 90% energy savings, optimal thermal comfort and a healthy indoor environment with minimal environmental impact. Our all-inclusive services cover: Tailored architectural projects Geotechnical and topographic land surveys Building permits and full administrative support Structural calculations and engineering reports Site management, contractor coordination and quality control Interior design and selection of sustainable materials 3D modeling and realistic visualizations before building Turnkey renovations for homes, offices and commercial spaces Landscaping and outdoor design services We operate within a 70 km radius from Sant Pere de Ribes, covering Sitges, Vilanova, Olivella, Castelldefels, Gavà, Canyelles, Mas Alba, Quintmar, and nearby areas. 🤝 We also work with local real estate agencies, offering pre-sale or post-sale renovations and referring clients actively searching for land to trusted agencies in our network. Our mission: to deliver fully completed passive homes in just 5 months, with all planning, technical work and construction handled by a single trusted team. Learn more at: