What Are Your Permitted Development Rights Really Worth in 2026?
Think of permitted development rights as a hidden asset attached to your house. They let you add serious space without ever applying for planning permission, and most homeowners have no idea how much that freedom is actually worth in pounds. Understanding your permitted development rights before you plan anything can save months of waiting, hundreds in fees, and unlock tens of thousands in value. What they actually let you build Permitted development rights are a national grant of planning permission from central government, written into the Town and Country Planning Order 2015. They let you carry out defined works on a house without asking your local council. The core allowances in 2026 are generous. A single-storey rear extension of 3 metres on a terrace or semi, or 4 metres on a detached house. A loft conversion of up to 40 cubic metres on a terrace or 50 cubic metres on a semi or detached. And outbuildings covering up to half your garden. Each of these adds real, usable spa...