An extension in Banbury lives or dies on the material, and that decision has to be made at the start rather than at first fix.
If the existing building is local ironstone, an extension has three honest options. Match the stone, which means sourcing reclaimed or newly quarried material of the right colour and bedding it in a compatible lime mortar. Use a deliberately different but sympathetic material, which can work extremely well and is sometimes what a conservation officer prefers to a poor imitation. Or use reconstituted stone, which is cheaper and which, in a conservation area alongside genuine ironstone, very rarely convinces anybody.
We will give you a straight opinion on which of those your building can carry, and we will tell you the lead time, because reclaimed stone is weeks rather than days and it is a common cause of a job stalling.
On the brick housing in Grimsbury and Neithrop, and on the modern estates, this is conventional work. A single storey rear extension of up to four metres on a detached house or three on a semi can fall within permitted development, with side access and a drive for the skip. Inside any of Cherwell’s 60 conservation areas the limits reduce and a side extension loses its permitted development rights entirely.
There is also the larger home extension route on unlisted property: up to eight metres on a detached house or six on any other, by prior approval, with neighbours notified and an answer in about six weeks. Our extensions work is set out in more detail there, including how the inspections fit around the build.