Groundworks around Banbury are shaped by two things: what the ground is, and what is already standing on it.
Ironstone ground can be excellent to found on and hard to get through, and the two frequently occur within a few metres of each other. That variability is why we put in a trial hole before the design is fixed rather than pricing off an assumption. It is the single most useful hour spent on a project here and it turns the biggest variable in the price into a known figure.
The second factor is the existing building. Old stone walls sit on very little foundation, sometimes on nothing more than a slightly wider course of stone bedded straight onto the ground, and they are entirely intolerant of a trench opened alongside them in one go. Excavation next to them is done in short lengths, supported where necessary, and never rushed to suit a hire rate. Where the wall is shared, that is party wall territory and needs proper notice.
The usual tree considerations apply on top. On shrinkable ground a foundation near a mature tree goes deeper than standard, and in a conservation area that tree is protected as well.
Everything is inspected before it is covered. We book the inspections and we do not pour over an unseen trench. Our footings and excavation page explains our approach.