Architect fees in the UK typically range from 5% to 15% of the total construction cost, but this can vary depending on factors like project size, complexity, and the architect's experience. Some architects may also charge a fixed fee or hourly rate. For example, a simple house extension might cost between £2,500 and £4,000 for planning applications and drawings, while a new build house could be £10,000 to £15,000.

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Typically, Sepia Group Architecture & Build will take you to Planning Permission on a simple extension for around £3,500, and this will include full photographic and measured surveys, existing and proposed plans and elevations, 3D modelling and renders, a design access statement, and the actual planning application along with local authority tracking.