It depends on the construction service description! Just because the general contractor tells you that his construction service description is similar doesn’t mean it actually is. The price for the double garage is realistic.
How high are the L-blocks? How many rows? Is the terrain modeled or are you allowed to fill and compact with a wheelbarrow?
Let’s wait for the construction service description!
The L-blocks would be set on three sides to fence in the property. The builder also said that he would pull another row of L-blocks crosswise under the building to secure it. This way, from the terrace you could go down with a few steps to a second level (the garden), which would then slowly slope downwards in the back (downhill). Therefore, at the very bottom, you wouldn’t need 1.8m or 2m L-blocks, but smaller sizes, which would of course have a significant impact on the price.
The construction service description of the other builder was already quite good, as was commented here. I hope, of course, that he now knows what his competitor offers when preparing the quote.
Town & Country we will no longer visit. So far, I have a good feeling about these two. The better one should get the job...