Base slab or strip foundations for garage

Hello community,

my boss and I will be building our own house in the next weeks/months. Everything is more or less settled by now. Now we are planning a double garage (consisting of two single garages each measuring 3m x 6m x 2.60m) with a walkable roof, basically a terrace. We already have a corresponding offer from a prefabricated garage manufacturer, where the strip foundations are estimated at €3,800. We have now read that a floor slab costs between €70 and €100 per m².

What are the advantages and disadvantages of both options? Would a floor slab be overkill and would these foundations actually be enough? Or, if the floor slab for the house is being poured, can’t you just pour a floor slab for the garage at the same time… since they’re already there?

Since I’m not an expert, not even a layperson (both thumbs pointing to the right), please try to explain it to me in the simplest words like:

"Look...the tree...inside...wood"

Of course, the question of the costs involved also exists.

Best regards,
SaRo

What are the advantages and disadvantages of both options?

A prefabricated garage and a base slab contradict each other, as the garage is delivered with the floor; thus a "box" as a whole. Rhenish greetings

That means it will come down to the strip foundations. Now only the question remains whether that is okay price-wise.

Hello,

definitely strip foundations - anything else would be, as already explained above, money wasted unnecessarily.

What you absolutely need to make sure of is that a corresponding recess (empty conduit) is left in the foundations right away to be able to carry out the garage drainage.

In my opinion, the EUR 3,800.00 is a good price.

Regards,

Dirk

Ok, thank you. Then we will do it that way.

Greetings from Berlin,
SaRo

I do not know the prices with you, but possibly the cheapest way could be that the garage supplier provides you with the appropriate foundation plans and the shell contractor gives you a suitable offer only for the foundations if he is already working with concrete in the house.

However, this requires some coordination by the site manager.