Keystone Home Additions

"Keystone Building is a trusted, family-owned home builder with over 30 years’ experience transforming homes across Western Sydney. We specialise in high-quality home extensions, including second storey and ground floor additions, helping families create more space without relocating. Our expert team manages every step—design, approvals, and construction—delivering exceptional craftsmanship, clear pricing, and minimal disruption. Committed to transparency, reliability, and client satisfaction, we’ve earned a reputation for excellence. Contact us today to discuss your dream home extension.We are based in Penrith and service the Greater Western Sydney, Inner West Sydney, The Hills District, Blue Mountains, North Western Suburbs, Cranebrook."