ᐅ Price of a lightweight concrete prefabricated garage including site excavation?

Hello everyone,
besides the bungalow we are currently building, we want to place a prefabricated garage at some distance from it. I have a supplier in mind who I think is very good. It is a pumice concrete prefabricated garage measuring 6 x 8 m (19.7 x 26.2 ft). Right now, I’m only concerned about the price. This includes everything (excavation without removal of soil, backfilling, compaction, 20cm (8 inches) waterproof concrete slab, and the garage itself, plastered and painted, but without gates and doors) at about 315 € / m² (29.3 $ / ft²) converted. Is that a reasonable price? I’m pretty sure I couldn’t build it myself, as I’ve been told many times.

Oh, this is in RLP, Region KO.

Thanks and best regards
Stephan

Oh, the price is excluding value-added tax (VAT).

Hello, the price is reasonable for a garage like this. However, I am not sure if you have chosen the right type. Make sure to read not only the advantages but also the disadvantages of this type. You will likely save money with a standard prefabricated garage.

Bluebyte schrieb:
That’s correct. The difference is about 1,500 euros. The downside of the precast concrete garage is that this model (6x8 meters (20x26 feet)) consists of two connected garages with a 4-meter (13 feet) long opening in the middle. The rest is a partition wall. That’s not ideal for me, as I want to work on my cars inside the garage.

The advantages of the pumice concrete garage clearly outweigh this, because it has about 50 cm (20 inches) of solid wall at the front and back. This leaves about 7 meters (23 feet) of free space.

What you say is not entirely correct. My post above was somewhat altered because the link I provided was deleted. Even in precast garages, the solid wall can be eliminated—you just need the right supplier (which I’m not allowed to name here, but there are several). Precast garages, including yours, generally cannot match the quality of masonry garages in most respects. Your garage has a significant disadvantage: its economic durability. Cold halls made of pumice concrete (like your garage) have weak spots at the joints. Water collects in these weak spots… in winter it freezes… (without links, I’d have to explain too much).

A summary. Bell-cast concrete is not ideal (normal concrete garages). They last economically for about 25 years, but are still a good option because after 25 years you could build two more for the cost of one masonry garage. Lightweight construction lasts about 50 years (special steel structures with double walls), is very cost-effective, and is hard to distinguish from masonry garages. Pumice concrete will require maintenance costs after some years that are hard to predict, but over the course of 25 years, total costs will exceed those of other options.