Shed base - What tradesman do I need?

[LucyFox]

I removed an old shed & want to replace it. The old shed was on a wooden sleeper type base but it rotted so ideally I’d like the new one on concrete - there is a concrete slab there but it’s not flat (which I guess is why the previous people put it on a wooden base?) I presume the existing concrete needs jackhammering out & relaying?
But what tradesman do I need to do this?

Maybe I am being silly, but if you buy properly treated wood there shouldn't be any need for a concrete base? I put my shed up on properly treated 4*4 inch lengths on a bed of sand 5 years ago and there's no sign at all of any wear and certainly no rot. If you do that all you need is sand (to create a draining, level surface and then wooden blocks you level on top.

Not helpful if you definitely want it on concrete I do realise, but definitely easier. I'm not especially handy and even I was able to manage it okay. I did it on grass, which I dug out (so it didn't rot under the sand potentially impacting the leveling) and then just sand and wooden lengths on top

If you go to a reputable shed supplier they often offer this as a service alongside erecting the shed, otherwise you just need a regular build or even a local handy man, depending on the size of the shed you could go with concrete but there are plenty of alternatives, paving slabs, gravel, and even proper plastic shed bases

@user1471528245

If you go to a reputable shed supplier they often offer this as a service alongside erecting the shed, otherwise you just need a regular build or even a local handy man, depending on the size of the shed you could go with concrete but there are plenty of alternatives, paving slabs, gravel, and even proper plastic shed bases

This point about paving slabs is good - I have had a long day, but mine is actually slabs with gaps in between on the levelled sand so the wood doesn't sit directly on the soil.

I bought a plastic base that's just several grids that slot together, then you pour pea gravel into all the gaps in the grid and use a broom to make sure all the gravel is in each of the gaps. Took about 30 mins, hardest thing was lugging the bags of gravel from the car to the back garden.

It's really sturdy and solid and the gravel means any rain water drains down and away from the shed. I built a plastic Keter shed on top which was also really easy. Was able to do it all by myself and I'm not particularly strong or handy. Putting together the shed took about 3 hours, needed nothing more than an electric screwdriver.