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Building a house extension can create valuable living space and may increase the value and enjoyment of your property. However, the total project budget is rarely limited to the builder's main construction quotation. Homeowners may also need to allow for professional fees, statutory approvals, VAT, surveys, London access costs, client-supplied finishes and unforeseen existing conditions. These costs are not necessarily being "hidden" by a contractor. Many sit outside the agre

A well-planned loft conversion can create valuable living space without reducing the garden or requiring a move. In London, however, the right solution is shaped by much more than the size of the roof: staircase position, structure, fire safety, planning restrictions, access and the property's ownership all matter. This guide explains the main conversion types, the dividing line between Permitted Development and planning permission, realistic 2026 construction budgets, approv