150 Euro / sqm development costs = realistic or usury?

But how do I know how big it has to be?

I'm about to just do it and wait to see if anyone responds.

With us, the earthworks contractor does that - calculations included!

But how do I know how big it has to be?

As a guideline, here is what our city has required in the statute for the development plan:

"The retention volume of the retention system must be at least 4 m³ per building plot. If the sealed surface area exceeds 200 m², the retention volume must be increased by at least 1 m³ for every 100 m² of sealed surface area started."

I cannot say where they got these values from.

However, no management was required from us either, but rather the throttled discharge into the stormwater sewer or the stormwater retention basin. Therefore, I assume that your cistern would probably have to be even bigger – that is, enough buffer, because you are not allowed to discharge the water – and you must also use the water again on your property.

An irrigation system fed by your cistern would therefore, in my opinion, be advisable.

The cistern itself hardly costs any extra if you choose a larger size. For example, Mall Reto in 4700l is €2800, in 9100l it is €3400. Additional costs mainly arise from the earthworks and disposal of the excavation. In case of doubt, it's better to choose too large, as you won't lose much.

It's just luck if you're from the countryside ;)

Well, Eching (our place) is considered part of the extended catchment area of Munich, aka commuter belt, outback... You can often see tractors driving around here. So a big city is something else :D

Land price: €125.25 per sqm Development costs: €69 per sqm ---> means for our plot of about 500 sqm a bit over €35,000 KAG contributions (water/sewer): €11.25 Total: €205.50 per sqm

But still bought without hesitation... because there is nothing on the open market and if so, for at least 50% more.

Yes, but then you have to subtract the land price! The topic here was only about the pure development costs without the price for the land itself. That is only relevant in the calculation of the lease through the hereditary building right. And yes, even the mentioned 50% more on the open market is still significantly cheaper than what is demanded here.

So your development costs would be €80.25 in Regensburg vs. "my" €200 in Eching. So 2.5 times as much. If your Weißbier at the beer garden also costs only €1.40 (0.5l) it would make sense ;) Unfortunately, I'm quite sure as a regular person I don't earn 2.5 times as much as a regular homebuilder in Regensburg.

I bet the companies in Regensburg would have accepted such a contract if they had only been asked. Unfortunately, they weren't. And I blame the municipality for having commissioned the expensive local companies (instead of the cheaper ones from outside), but passing on the costs entirely (they could have split it) to the leaseholders, who are neither owners nor clients. And for someone like me, who first compares prices everywhere for every €10 item, such an approach is simply incomprehensible or unfair.

There are only two possibilities: Be happy to get a plot at all or move far away. You decide alone. Complaining or whining doesn’t help.

Unfortunately true in the final instance. The application period runs until the end of June, evaluation will be done in July (why it takes a month I don’t quite understand, but okay) and it will be announced in August. Then we’ll see. Bye.

Yes, but then you have to subtract the land price! The topic here was only about the pure development costs without the price for the land itself. The latter is only relevant in the calculation of the lease due to the heritable building right.

But unfortunately, you only pick out the information you want to see here and ignore the rest.

As Nordanney has already written, the general land price does indeed play a role in development. For every square meter of development facilities, the municipality may have to pay the market value for one square meter of building land in the worst case. Higher land prices therefore directly result in higher development costs.

Furthermore, it has already been mentioned here that if, for example, the sewer capacities are exhausted and a completely new system including perhaps a stormwater retention basin etc. has to be created, the price can quickly skyrocket.

Speaking of Regensburg: In the north of Regensburg, a new construction area was developed in 2019 where the development costs were well over 200 euros per square meter.

So this pub table chant like "they should just bring in a company from a cheap region" doesn't help much. Of course, there are cheaper areas in Germany where labor costs would be lower, but with the logistics (travel, overnight stays for workers, etc.) you will probably end up being even more expensive in the end.