Home Extension UK - How to build a home extension from start to finish. How to select a home extension architect or designer to how get the best home extension building costs. Advice and guides for the homeowner wishing to extend their home. How to obtain planning permission using great home extension layouts and ideas. Control your home extension build costs or estimates. Building regulations advice and guidance on permitted development rules. Home extension plans from granny flat to extending a victorian semi or terrace home. Various materials and construction methods for home extensions.