How much house is in it?

Good, you need to know about the cats. Ours have been outside from a young age, are now 10 and 11. The same applies to all the cats in the family. Only one relative had a lot of losses on the main street and due to cat-hating neighbors; they now only let their cats out in an attached aviary.

Then you have a simple but unfavorably cut apartment where almost everything leads to the living room, but in the house, you are planning the floor plan yourself. I would reconsider that. 130 is still 50 more than currently AND, if planned well, it feels much, much bigger.

Slowly I see the middle flashing on the horizon

Nope, you don’t. The whole planning is quite wishful thinking. Calculation unrealistic, everything is twisted to fit the thought structure. Finding 40k expensive for the basement but pointless Kfw 40 would be nice. You might be able to build a terrace for 2000€ yourself from pallets, but that’s about it. And then 20k for a cat fence, you’ve got a sense of humor. And then numbers like 1000sqm of young forest to clear in a few weekends including stumps. Are you the Hulk? Or do you have an excavator and a truck for all that junk? I’m curious about Finger’s offer, there should be a first aha moment.

Nope, you don’t.
The whole planning is quite wishful thinking.
Calculation unrealistic, everything is twisted to fit the mental construct. Finding 40k for the basement expensive but pointless KFW 40 would be nice.
A terrace for 2000€ you might build yourself out of pallets, but that’s about it.
Then 20k for a cat fence, you’ve got a sense of humor.
And then numbers like clearing 1000sqm of young forest in a few weekends including stumps.
Are you the Hulk? Or do you have an excavator and a truck for all that junk?
I’m curious about Finger’s offer; that should give a first aha moment.

Terrace:
Should work with own labor, I can borrow tools from friends/family and since the terrace doesn’t need to be finished in one weekend, maybe some friends or my brother will come to help a bit.

Yes, I think 40k for a basement is expensive. Am I allowed to, or not? That’s why I’m moving away from it. We don’t really need it, so it can be saved.

Regarding the cat fence, I just checked again and actually can’t explain how I got to 20k. I found something for 2k.

As for the young forest thing: the necessary equipment can be borrowed, but maybe I am the Hulk. Although I’d rather be Black Widow, I find her more attractive. Probably smells less too.

Hmm, 30x60 would be nice. They are also available as standard at Finger. How do the installation costs change there?

I should do it, true. Thank God I have half a week off
Until now I really thought that KfW 55 means the house only has 55% of the heating costs of a normal Energy Saving Ordinance 16 house.

With KNX you can retrofit the components. We don’t want to do everything at once anyway. And the photovoltaic system could possibly come later.

So if 30x60 is enough for you, everything is fine. Only above that it typically becomes chargeable during installation, but it just looks nicer.

The thing with the KfW building works a bit differently. Roughly outlined: a theoretical building with the corresponding materials is placed into a certain outside temperature – with the resulting losses the energy demand is calculated, which logically has to be supplied to maintain the indoor temperature. The energy demand determined this way is then multiplied by an artificial primary energy factor to calculate the final primary energy demand. And here the fun begins: electricity has a factor of 1.8 but wood (log stove, pellets) only 0.2. After multiplication, from KfW’s perspective your building with pellet heating “consumes” only one ninth of the same building with electricity (e.g. with air-to-water heat pump). Although this doesn’t change the real consumption, it immediately makes you feel warmer at heart.

Topic smart home, regardless of the concrete implementation: ideally, the wiring is run from every switch, socket and light outlet to a cabinet where the active components are located. Five instead of three wires can’t hurt, in some cases it can be used sensibly. It’s a bit more effort than a normal electrical installation.

So if 30x60 is enough for you, all is good. Only beyond that does it usually become chargeable when laying, but it just looks nicer.

The KfW building thing works a bit differently. Roughly outlined: a theoretical building with the corresponding materials is placed in a certain outside temperature – with the resulting losses, the energy demand, which logically has to be replenished to maintain the indoor temperature, is calculated. The energy demand determined this way is then multiplied by an artificial primary energy factor to calculate the final primary energy demand. And here’s the fun part: electricity has a factor of 1.8 but wood (log stove, pellets) only 0.2. After multiplication, your building with pellet heating “consumes” only about a ninth of the same building with electricity (e.g. with an air-water heat pump) from the KfW’s point of view. This doesn’t change the real consumption, but it definitely makes your heart a lot warmer.

Topic smart home, independent of the specific implementation: ideally, the wiring leads from every switch point, socket, and light outlet to a cabinet where the active components are located. Five instead of three cores can’t hurt either; in some cases, it can be used sensibly. It’s a bit more effort than a normal electrical installation.

30x60 cm tiles are definitely enough for us. I find them pretty enough compared to 30x30 cm and by far don’t need anything bigger.

Thanks for the explanation about the KfW standards. I just found a page that shows how it’s calculated, and the part about the primary energy source is explained quite well there, too. It’s really cheeky that almost nowhere else states what the energy saving quota of a corresponding KfW standard house is actually compared against. In my naivety, I assumed it was a new building with the same heating, just insulated according to the simple Energy Saving Ordinance 2016 standard...

Do you have KNX installed? If yes: is it really so much better than, for example, Alexa with the appropriate integration to justify the exorbitantly higher costs? We currently have Alexa for lighting and heating control and could at least include the corresponding elements for lighting. There are also possibilities for automatic shutter control that even seem quite affordable.

So, I have now taken a piece of paper again and tried to sketch both options for plots...

1. Plot with a house to be demolished:

Plot: 155,000
Purchase incidental costs (7%): 10,850
Demolition: 25,000
Garage: 20,000
Terrace: 3,000
Driveway: 2,000
Fence: 2,000
Floor tiles tiler: 8,000
Floor tiles self-laying: 4,000
House 150 sqm: 290,000
Wall paint & filler: 1,000 (?)
Sampling: 10,000
Additional construction costs: 40,000
Photovoltaics: 20,000
KNX: 10,000
Kitchen: 10,000

= 606,850 (with tiler)
= 602,850 (self-laying tiles)

2. Plot with trees:

Plot: 138,000
Purchase incidental costs (11.76%): 16,230
Clearing: 5,000 (?)
Garage: 20,000
Terrace: 3,000
Driveway: 2,000
Fence: 2,000
Floor tiles tiler: 8,000
Floor tiles self-laying: 4,000
House 150 sqm: 290,000
Wall paint & filler: 1,000 (?)
Sampling: 10,000
Additional construction costs: 40,000
Photovoltaics: 20,000
KNX: 10,000
Kitchen: 10,000

= 575,230 (with tiler)
= 571,230 (self-laying tiles)

I honestly have no idea anymore whether I’m suffering from loss of reality...
For now, I’m waiting to see when I get the appointment regarding the development plan and whether the city will even consider an application that deviates from the 45-55° pitched roofs with only one full floor.

If that works out, I’ll see what the offers from Finger and Hanse say...