Yes the cupboard base will need to go. The integrated dishwasher will sit on it's own legs directly on the floor. The last Bosch one I fitted had three, with worm drives at the front to raise/lower it. Ditto the Baumatic one it replaced. Just keep the full width kick board to go in front of these legs.
You will slot it in, then raise the washer up flush with worktop. The ones I've had then had a couple of screws at front that went into underside of worktop. If you have an MDF worktop, stick something protective on the underside to help reduce damage from steam, moisture and heat from the washer. Every time you open the washer when it's full of hot stuff or mid cycle you get a massive waft of steam and vapour coming out. On my worktop there's a little groove on the underside, where over the years moisture has caused the wood to bulge slightly. A quick preventative coat of PVA would probably help no end to avoid this.
You will need a new piece of wood to screw to front door of dishwasher that ideally matches the rest of the kitchen. You're existing cupboard door probably won't be quite right size and will have handle in wrong place. Some washers have a control panel facing outwards, some have buttons on the top edge of door and only visible when you pull it down. The wood face you use will differ in size based on this. If you're using MDF, the piece will need nice veneer edges stuck on appropriately, rather than having to cut it down. Be warned though, after several year the top edge will start to come off from moisture.
That said, we went cheap skate on latest washer, and just fitted a standalone one in same gap (just had to cut kick board down). The front piece of wood was knackered (from moisture) and it was £150 odd cheaper than the equivalent integrated washer.
You will slot it in, then raise the washer up flush with worktop. The ones I've had then had a couple of screws at front that went into underside of worktop. If you have an MDF worktop, stick something protective on the underside to help reduce damage from steam, moisture and heat from the washer. Every time you open the washer when it's full of hot stuff or mid cycle you get a massive waft of steam and vapour coming out. On my worktop there's a little groove on the underside, where over the years moisture has caused the wood to bulge slightly. A quick preventative coat of PVA would probably help no end to avoid this.
You will need a new piece of wood to screw to front door of dishwasher that ideally matches the rest of the kitchen. You're existing cupboard door probably won't be quite right size and will have handle in wrong place. Some washers have a control panel facing outwards, some have buttons on the top edge of door and only visible when you pull it down. The wood face you use will differ in size based on this. If you're using MDF, the piece will need nice veneer edges stuck on appropriately, rather than having to cut it down. Be warned though, after several year the top edge will start to come off from moisture.
That said, we went cheap skate on latest washer, and just fitted a standalone one in same gap (just had to cut kick board down). The front piece of wood was knackered (from moisture) and it was £150 odd cheaper than the equivalent integrated washer.