Floor plan design single-family house solid wood construction 140 sqm in Lower Saxony

For that size, I would rather go with the Flair 134, which costs from 275,000 EUR in a mid-priced region like Hanover. So it could work if you do a lot yourself and find reasonably priced craftsmen.

Thank you very much for your assessment. :)
That was our plan. Do a lot ourselves, given the prior knowledge and experience – and coordinate, supplement, and finally have everything approved by the local masters. So far, everyone we want to involve has actually been totally open and interested, precisely because it’s something completely different.

(...) precisely because it is something completely different.

However, there is also a not insignificant risk that it will become expensive. I can only offer you things cheaply that I do daily or have lying in the drawer. If I am supposed to do something completely new, it costs money, simply because I have no experience with it and have to calculate risk premiums in case it doesn't go as I imagine.

I cannot understand communities that impose such restrictive eave and ridge heights. The sense of space is great in our upper floor, but mainly thanks to large dormers facing south and north. In the attic, we raised the knee wall in front of the collar beam to about 60 and just under 80 cm respectively. That would have been too little for me on the upper floor as a full storey. Dormers cost money and are not infinitely allowed or possible.

By the way, my new house is solid wood (10cm glulam, 24cm blown-in insulation + wood fiber insulation board = KfW40+), which also required meticulous electrical planning. If your walls are also clad with drywall, retroactive chasing is of course possible within a narrow scope. We had an extremely modern planner and were always able to view our plan in 3D in the browser, toggling various layers on and off. For example, viewing just the vertical chases and recesses for boxes. Without these aids, more things would have gone wrong.

For us, the feeling of space in wooden buildings was also decisive, and solid construction was not an option for even a second. A lot of personal effort is really a must for you; during the approximately one-year construction phase, we helped significantly in many trades (sometimes to the point of complete physical exhaustion).

Presumably, many will argue that the budget is too low and therefore a party pooper, but with the planned personal effort, it can work. Don’t let yourselves be discouraged! But also don’t naïvely count on the work of relatives because you engage yourself quite differently for yourself than for others...

If your construction company plans the shell structure well (ours did it perfectly as mentioned above), even "one-off pieces" are feasible at reasonable costs. Planning costs may increase slightly, but implementation with modern CNC, timber-cutting systems etc. makes it affordable (that was our experience).

Perhaps additionally. Our eaves and ridge height were calculated starting from the top edge of the finished floor. It could definitely be different (less favorable). In your case, I still don't see the 4m eaves height and the 8.5m ridge height fully utilized, since there are still 30 cm missing ;-)

The problem with doing the work yourself is always that you misjudge and especially don’t plan for the fact that you pay significantly more for the materials than the tradesman. Especially civil engineers tend to misjudge this a lot because they tend to underestimate the professional factor (which they know from construction) compared to the amateur. That would happen to me too if I had to estimate my work for an amateur.

I’ve said it before. You need a clamp, you go to the hardware store. You come back, you need a screw, you go to the hardware store… the tradesman just goes to the car briefly and has all the stuff there.

A really big problem with doing the work yourself is also sticking with it… for example, I was sure I would lay all the floors myself, even the tiles. Now I’m busy with work again, the handover of the house is approaching… so we gave the tiling work to someone else… Doing it yourself takes time… and you can only move in once certain things are finished.

However, there is also a not insignificant risk that it will become expensive.
I can only offer you things cheaply that I do every day or have in the drawer. If I have to do something completely new, it costs money, simply because I have no experience with it and have to calculate risk surcharges in case it doesn’t go as I imagine.

Thank you for the hint. Probably exactly that will happen in parts, but we can only assess that concretely when we go into detailed planning. Basically, having regional companies that are interested in our project is motivating for me. We still have a few minor items left – although it’s a shame that our budget won’t cover a turnkey complete project with a double garage, Feng Shui garden, and Jacuzzi, we are aware of that. ;) Through my job I am relatively close to current market prices and can reasonably pre-calculate some major items within a certain framework, so that our budget will not be blown completely. We know that our project carries a considerable risk – and we appreciate every tip from you that we can incorporate into our mental checklist!

I can’t understand municipalities that impose such restrictive eave and ridge heights. The spatial feeling in our upper floor is great, but mainly thanks to large dormers facing south and north. In the attic, we extended the knee wall in front of the collar beam to about 60 cm and almost 80 cm. That would have been too little for me in the upper floor as a full story. Dormers cost money and are not infinitely allowed or possible.

The development plan says the following:

Dimension of structural use, § 9 paragraph 1 number 1 of the Building Code 2.1 The dimensions of structural use are limited by the eave and/or ridge heights specified in the plan drawing as maximum values (see usage template).
As the lower reference level for eave and ridge height, the final edge of the carriageway of the adjacent development road at the center of the street front of the property (street side from which access is provided) applies. For properties with several street sides, the averaged height according to the above definition applies. The upper reference point for determining the maximum height is the intersection of the eave-side outer wall with the roof covering (eave height) or the highest point of the roof covering of a building (ridge height). Chimneys and antennas may exceed the maximum ridge height. For buildings with half-hipped roofs, exceeding the specified eave height is permitted on two opposite building sides. The eave height does not apply to subordinate components, such as bay windows and dormers, up to a maximum width of 50% of the eave length.

By the way, my new house is solid wood (10 cm glulam, 24 cm blown-in insulation + wood fiber insulation board = KfW40+), which also required meticulous electrical planning. However, if your walls are also clad with drywall, subsequent chasing is, of course, possible to a limited extent. We had an extremely modern planner and could always view our planning in 3D in the browser and toggle various layers on and off. For example, viewing exclusively the vertical chases and grooves for boxes. Without these aids, more would have gone wrong.

In our case, there is no interior wall cladding – we keep the beautiful spruce planks – so we can’t mill anything afterwards. ;) We don’t yet know what the manufacturer’s planning tool looks like. When the time comes, I would like to get back to you – if I may – maybe you have an eye for “that was also like this for me and it’s annoying because... better do it differently” :)

Perhaps as an addition: Our eave and ridge height was calculated starting from the top edge of the finished floor. It can certainly be different (and less favorable). For you, I don’t see the 4 m eave height and 8.5 m ridge height as fully used yet; there are still 30 cm missing ;-)

That would be the case for us as well, see excerpt from our development plan two quotes above – right?

Many thanks at this point for your valuable experiences! :)