ᐅ Build a retaining wall approximately 2.5 meters (about 8 feet) high.

But 17.5 concrete form blocks are a joke for that height and load. Have a structural engineer calculate it. I think it will be difficult even with 30 cm (12 inch) concrete form blocks if there’s a parking space on top.

I think 24/25 cm (9.5/10 inches) should be sufficient – but not as a solid wall, rather secured laterally in a stepped manner.

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11ant schrieb:

I think 24/25 cm (9.5/10 inches) should be enough – but not as a wall, rather stepped and secured crosswise.

I can imagine that too... in any case, it would look better than this embankment (also shaped), and I would have a bit more usable plot area.

But I will talk to a structural engineer when I get the chance to see what they recommend. Whether it’s possible with formwork blocks or only with L-shaped blocks.

Saarländer79 schrieb:

I have considered L-shaped blocks as well, but a wall like that can quickly cost around $25,000.

I need to talk to a structural engineer to figure out how to support it properly.

Planting blocks could work too. You would need to install them with the appropriate slope. Visually, though, I think they look quite poor. I’m estimating about 20 meters (66 feet), though it might be a bit more.
20 meters (66 feet) of L-shaped blocks of that size cost around $8,000. If the landscaping contractor has good rates, maybe even less. I think $25,000 is too high. Still, it’s a lot of money.
For the formwork blocks, you’ll need a footing so you can reach a wall height of at least 3 meters (10 feet). Mixing concrete yourself is out of the question at these quantities, so ready-mix concrete with a pump will be necessary. I checked the numbers again—this would be about $3,500 just for the concrete.
The formwork blocks alone would be another $2,000 or so... financially, that’s really a whole different league. I didn’t expect it to be that expensive.

Do you need to cover the entire area or not? A two- or three-tier solution might be possible. That way, the load would be distributed more effectively.

Has it been considered that the property should be aligned with the neighbor’s and, not least, that drainage should take place on your own land?

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danixf schrieb:

Gabion walls could also work. Just install them with the proper slope. Visually, however, I find them quite low quality. I’ll simply assume 20m (66 feet). I think it’s actually a bit more.
20m (66 feet) of L-shaped retaining wall blocks of this size cost around 8k. If the landscaping contractor has good terms, even less. I think 25k is too much. Still, of course, a lot of money.
For the formwork blocks, you need a foundation to reach at least 3m (10 feet) wall height. Mixing concrete yourself is absolutely out of the question with these quantities, so ready-mix concrete with a pump will be necessary. I just checked again for us — that would be about 3500€ for the wall.
You’ll have to spend about 2000€ more on the formwork blocks... So financially, it really is a completely different level. I didn’t expect it to be that significant.

Do you need the entire area or not? A 2- or 3-tiered solution could be considered. This way, the load is distributed more evenly.

It’s 15m (49 feet) to the house, and the entire plot is just under 60m (197 feet).