ᐅ Prefabricated house: should you start with an architect’s design and then choose a prefab provider, or the other way around?

Created on: 13 Aug 2025 22:38
G
Gänseblümchen7
We are currently planning a single-family house. The plot is already secured, and the development plan is straightforward (large building area; we are allowed two full stories with a pitched roof…).

We have spoken with several prefabricated house suppliers and gone through the preliminary model selection process. We were actually ready to make a decision soon. We are basically laypeople but have continuously gathered information. I noticed that in one of the offered floor plans, the utility room does not have an exterior wall (which seems problematic for a heat pump, right?).

It is generally said that the “detailed planning” will be done with the architect later. I’m starting to wonder if it might be smarter to first have the planning done with an architect we pay ourselves, and then request offers from prefabricated house manufacturers to implement it?

Currently, we are considering Schwörerhaus, Weberhaus, and Fingerhaus. We are not completely satisfied with any of their floor plans. With Weberhaus, we could stay within one building series, which theoretically could improve the price, but is that really true?

What are your opinions?
A
Arauki11
15 Aug 2025 11:27
Papierturm schrieb:

We will make the interior nice and cozy. And try to break up the tall walls with a terrace, entrance canopy, and so on.

That’s exactly what I meant. I know some houses that surprised me a lot inside, maybe precisely because I had preconceived expectations coming from the outside. As mentioned here several times before, turning an apparent flaw into a feature—even if that doesn’t perfectly apply in this case—and in the end, it’s also about the much-quoted “inner values.” If you run out of ideas, you could always share them here sometime for a brainstorming session.
11ant15 Aug 2025 14:56
Gänseblümchen7 schrieb:

I forgot to attach it..
Well done: sketched by hand, pencil or pen doesn’t really matter.
Poorly done: this is a ground floor – you shouldn’t start with that; not only under a (sloped roof) attic but also not under an upper floor with vertical walls. If you start with the ground floor, then tinker with it until you are almost satisfied and only then turn to the upper floor or even the attic, that leads to big frustrations. Amateurs do this only if they want to stay amateurs and keep wondering how the professionals manage to do it better. The trick is simple: don’t derive the upper from the lower, but the less complex from the more complex. So: plan both floors first, then draw the upper floor, then place tracing paper over it and draw the ground floor. This tip is for other readers, not for you!

Your tip: stay on the conceptual level!
That means first establish the room program (list), then qualify the room program (approximate room sizes, table). The sum of room sizes for the “city villa” divided by 2 (50:50, for the “one and a half floors” about 65:35) shows you how “?” rooms need to be reallocated between the “ground floor” or “upper floor/attic” lists so that the totals add up. Your total should be around 130/135 sqm (square meters) (because you want 160 and roughly 20% circulation space is added proportionally to each room). If your list adds up to 80 sqm on the ground floor and 50 sqm upstairs, then you can shift about 15 sqm from the ground floor upward and plan an upper floor, or leave the lists as they are and build an attic. The “Instead of a villa” is primarily favored by marketing victims; the “one and a half floors” is not necessarily the “Plan B.” The most inexperienced beginners show themselves right in their thread title, “we want to build a city villa” (because “that’s how you do it,” without thinking first). The biggest wannabes gladly sacrifice their personal living happiness on the altar of trying to squeeze the maximum allowed eaves height out of the restrictive development plan (FCK U, building authority – this is where the experts live!).
Papierturm schrieb:

In my opinion, the relationship between roof and building volume is off. It looks like the house either needs a steeper roof (not allowed), or about half a floor needs to be removed (also not allowed).
Here you are probably referring to your project, @Papierturm.
Papierturm schrieb:

a Monopoly house stretched upward.
Better a house on the Schlossallee than a hotel on Turmstraße.
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