Many homeowners assume they need an architect before approaching a builder. While architects are invaluable for complex projects, they're not always necessary — and using a design-and-build company like TEMBOK can save you significant time and money.
You probably don't need an architect if: your extension is a straightforward single-storey rear or side extension, the design follows a common layout, and the project falls within permitted development. In these cases, a building designer or design-and-build service is usually sufficient.
You might need an architect if: the project involves a listed building, requires creative solutions for an unusual site, involves a large-scale new build, or you want an award-winning design that pushes boundaries.
The cost difference is significant. Architect fees typically run 7–12% of the build cost — so on a £60,000 extension, that's £4,200 to £7,200. A design-and-build service often includes design within the overall project fee.
The biggest advantage of design-and-build is that the people designing your extension are the same people building it. This eliminates the common problem of architects designing features that are expensive or impractical to construct.
At TEMBOK, our in-house design service covers everything from initial concept sketches through to full Building Regulations drawings. We work with structural engineers and, where needed, collaborate with architects for complex projects.
Our advice: talk to a design-and-build company first. If your project genuinely needs an architect, a good builder will tell you. But for most residential extensions in Kent, our in-house service delivers better value and a smoother process.