Planning drawings and building regulations drawings are two essential but very different stages of any UK building project. One secures permission for the design and appearance of your home; the other ensures the structure is safe, compliant and buildable. In this guide, Clarkson Construction explains exactly what each drawing type includes, when you need them, how much they cost and how they apply to extensions, renovations and new builds across Milton Keynes and Buckinghams

Discover the real cost of house extensions in Milton Keynes. This 2025 guide covers prices, planning rules, timelines, and expert tips to help you budget with confidence.

Transform your home with precision. In this guide, Clarkson Construction explains everything you need to know about architect drawings for house extensions and renovations — from planning and Building Regulations to realistic UK costs and timelines. Whether you’re opening up your living space or adding a double-storey extension like the one pictured, here’s how to take your project from concept to construction — the right way.