brick footing

Hi all, I’m not a bricklayer but looking to build a bbq/pizza oven area in my garden using concrete blocks. Am I right in saying that the footings should be at least 18” deep and 1’ wide? I will be using 450 x 250 x 100mm blocks and the main wall will be 3.9 x 1.27m with 1 return at one end of...

We recently lowered the floor in our victorian terrace by approx 15cm. But to do this our builder had to dig the soil down approx 50cm below the brick wall footings before bringing the level back up again with hardcore/concrete/insulation/screed then tiles. Is this against building regs? And can...