Had a similar situation to yours about 10-11yrs ago and had a driveway enlarged.
The porperty originally had a driveway down the side of the house (two long rows of slabs with chips elsewhere) which was long enough for two vehicles and a grass/flowerbed area to the side of the driveway (front of the house).
I got a driveway company in to rip it all out, dig down to alter the levels, weed fabric etc & then monobloc the whole area. Iirc it cost £8.5k but, as I say, that was a good while ago.
Also had to shell out to have the drop kerbs extended & pavement retarred so the widened drive could be used properly. Think that was about 1.5k. It would obvs cost much much more to have the same work again today.
Good luck.