Easement water supply line

Are there any experiences regarding the topic of depreciation?

What depreciation? Why should there be depreciation for a piece of garden? These easements are found in abundance and usually do not affect you.

Why should there be a depreciation for a piece of garden?

Because you cannot dispose of it as you wish. No planting, no vegetation, no terrain modeling, no garage, no garden house, no paving work or other permanent surfaces, no irrigation systems or drainage, the property must always be freely accessible, no point or strip foundations... Easement rights can very well impair it. Especially and particularly if not secured by a connection relationship.

Because you cannot dispose of it as you please. No planting, no vegetation, no terrain modeling, no garage, no garden shed, no paving or other fixed surfaces, no irrigation systems or drainage, the property must always remain freely accessible, no point or strip foundations... Utility easements can indeed be impairing. Especially if not secured by a connection arrangement.

Planting and vegetation are, of course, possible. This also applies to terrain modeling. I cannot recall in the past almost 25 years that value reductions have been reflected in the price. It is simply a piece of a garden, front yard, or whatever. In my penultimate house, our private access road (which was common property of four semi-detached houses) was burdened with a utility easement.

Planting and vegetation are of course possible. This also applies to terrain modeling.
In the last almost 25 years, I cannot remember any depreciation being reflected in the price. It's simply just a piece of simple garden, front yard, or whatever. In my penultimate house, our private access road (which was communal property of four semi-detached houses) was burdened with an easement.

he is right, you cannot freely dispose of a piece
that is basically a disadvantage
disadvantages can, but do not have to, lead to depreciation

regarding planting: Trees, for example, are not allowed

Such a depreciation is not determined without an expert or an actual sale with prior negotiation.

If you use the not freely available property yourself as a "simple" garden, then everything is fine. There is also no depreciation over the years.

But if you now have a property and someone wants an easement on it, and you then want to sell the property again, it may be worth less due to the now registered easement.

If you buy a property with rights on it and then sell it again, it is no longer a depreciation because it already happened at some earlier point.

Regarding the above:
I consider it difficult to talk about 20-30% here without being able to substantiate it somehow.