Blog
Cost guides, planning explainers and project walkthroughs.
Practical, no-spin articles written for UK homeowners thinking about extensions, loft conversions or whole-house refurbishments.
Projects
Before and after — recent RCB Design & Build projects
A walkthrough of recently completed RCB projects — what we found, what we built, and the lessons that fed into the next project.
Hiring
How to hire a builder in 2026 — the proper checklist
Hiring the wrong builder is the most expensive mistake in any construction project. This is the checklist we tell our own friends and family to use.
Planning
Planning permission for house extensions: 2026 guide
Many UK house extensions are still possible under permitted development in 2026, but the rules have tightened in conservation areas and Article 4 zones. Here is what you actually need to know.
Cost Guide
How much does a loft conversion cost in London and Kent in 2026?
Loft conversions in London and Kent in 2026 typically run from £45,000 for a simple Velux conversion to £120,000+ for a full mansard. Here is what the numbers actually look like.