The correct dimensions for steps if I'm not wrong, as we're currently building is, maximim riser being 190mm and minimum tread is 240mm. The riser cannot be different meaning that you can decide on any hight but not exceed 190mm and however many steps you decide on, all risers must be the same, whether they are the maximum height or slightly less. Your steps are definitely illegal and quite unsafe as you say and should never have been made this way. I wouldn't raise the first step to the timber riser because if you get rain, it could flow over the step and into your home. The small step if extended right to the front of what is your second step would be the easiest and correct fix, if the height doesn't exceed 190mm from the bottom of the first step once you take up the height which looks to be only about 50mm at best plus whatever the height is of the first step which does look to be less than 190mm, perhaps 150mm but I'm guessing?? Could be that you should only have had one step ever!!.....hopefully the height from the ground up to the timber riser isn't more than 190mm and your laughing!! The riser height is a tried and tested height for a person to lift their foot from one step to the next. If you are not selling for some time or ever, then it's not about being legal but being safe and if your measurement ends up being say 210mm for example, that would still be better that 50mm and 150mm or whatever the height actually is currently. As for tread, again, once you choose a measurement at or over 240mm, every tread must also be the same. If it's wider than 240mm, it allows for a person to place their foot squarely without stubbing their toes on the riser or feeling like their heel is hanging off the step. We have gone for quite large treads on our entry steps being about 500mm wide and it also looks nice if the tread is wide on a large or wide entry like ours being a few metres wide as we have double front doors at our entry once the home is finished. I've included a close up of the steps as well as a full shot of the home with the frame already up if the photo's have uploaded properly. Your steps need to be removed and lengthened to the correct dimensions but a qualified builder is probable the way to go, as any builder can tile or reccomend a tiler once the steps are fixed. Good luck

You should put this with your other thread in a Houzz story with pictures.

making a mould and pouring the concrete would be your best bet in getting the look you are after, you can buy the smaller ones but I think the large one you may have to do yourself or have made, lots of info on making them on Pinterest.

These tips are so simple and easy to implement, we'll definitely be using them to add that personal touch - Rhiannon