ᐅ Is it practical to build a prefabricated house using a solid construction floor plan?
Created on: 23 Sep 2024 22:50
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Skya2020
Hello everyone,
We have just purchased a plot of land in NRW. The previous owners had already hired an architect to fully oversee the construction using traditional masonry methods and have already paid over €50,000 (about $54,000) for phases 1-6. There is already a building permit / planning permission, so construction could start almost immediately.
However, we are planning to build using prefabricated construction and are now wondering how to proceed best. The previous owners have offered to sell us their plans. Either way, we would still need to modify them (aside from the exterior dimensions) to fit our requirements.
The plot is on a slope, and there aren’t many options for building on it, so the design would likely be very similar either way.
Does it make sense to buy the plans from the previous owners and then work with the architect to incorporate changes before approaching prefab house manufacturers? Or are the floor plans not very useful due to the different construction method, making it more reasonable to hire a different architect for a new design?
And if you were to buy the plans—how much would you pay (they don’t really have a strong bargaining position)?
We are completely at the beginning of our home-building journey, so I apologize if this is a naïve question... We just don’t really know the best way to start.
We have just purchased a plot of land in NRW. The previous owners had already hired an architect to fully oversee the construction using traditional masonry methods and have already paid over €50,000 (about $54,000) for phases 1-6. There is already a building permit / planning permission, so construction could start almost immediately.
However, we are planning to build using prefabricated construction and are now wondering how to proceed best. The previous owners have offered to sell us their plans. Either way, we would still need to modify them (aside from the exterior dimensions) to fit our requirements.
The plot is on a slope, and there aren’t many options for building on it, so the design would likely be very similar either way.
Does it make sense to buy the plans from the previous owners and then work with the architect to incorporate changes before approaching prefab house manufacturers? Or are the floor plans not very useful due to the different construction method, making it more reasonable to hire a different architect for a new design?
And if you were to buy the plans—how much would you pay (they don’t really have a strong bargaining position)?
We are completely at the beginning of our home-building journey, so I apologize if this is a naïve question... We just don’t really know the best way to start.
MachsSelbst schrieb:
But I have been working in custom machinery manufacturing for 15 years, and it’s like this... [...] Because we, surprise, miscalculate. We sell the basic functions cheaply, options from the catalog at a higher price... Special features get really expensive because we charge by the hour and effort. [...] That’s how they do the calculations. And the architect knows that... And so does 11ant... I want to provide clear information to my readers here and elsewhere, not to turn them into construction cost calculation experts. That’s why, as long as it is always emphasized that this is an average and representative value, I find the standard flat rate of 3,000 per sqm (3,000 per 10.8 sq ft) more suitable than trying to explain to questioners that a formula with seven variables plus caveats would be more precise.
Moreover, building a detached house is basically custom machinery manufacturing as well, although with larger tolerances due to materials and production processes. The gradient between basic functions, common options, and individual special features varies greatly—generally speaking, it is most pronounced with low-budget houses.
From IT and telecommunications, I know it similarly: Standard user interfaces scale linearly with quantity and can be heavily discounted, while engineering surcharges that border on unreasonable are added. And solutions suddenly cost double if they’re labeled as “solutions.” The Siemens air hook has daily gold prices.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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hanghaus202326 Sep 2024 09:09Has the previous owner already submitted the building permit / planning permission application? The architect should also have the site survey plan. The previous owner can request this from them.
Do you possibly have any photos of the plot so it’s easier to visualize the slope?
Have you checked the property in the geoportal yet?
Do you possibly have any photos of the plot so it’s easier to visualize the slope?
Have you checked the property in the geoportal yet?
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hanghaus202326 Sep 2024 09:23MachsSelbst schrieb:
No, it doesn’t work.
Because the 3,000 EUR/m² (3,000 EUR per square meter) is an average calculation, mixing expensive rooms and cheaper rooms. If the contractor does a proper calculation, the result can be different.
I’ll put it this way: if you build 30 m² (320 square feet) more living space, it will cost at least 3,000 EUR per m². On the other hand, if you want to build 30 m² less, I agree with you. Then it will only be about 1,000 EUR per m².
I have 30 years of experience in construction costing and change order management. I can tell you exactly how that works.
An architect used to calculate based on cubic meters of built volume. Today it’s based on square meters of living area or floor area.
In the bidding phase, small construction companies still calculate costs per m² based on experience from the previous year.
But enough off-topic now.
hanghaus2023 schrieb:
Has the previous owner already submitted the building permit application? The architect should also have the survey plan. The previous owner can request it from them.
Do you possibly have photos of the plot so we can get a better idea of the slope?
Have you checked the property in the geoportal yet?Yes, there is a building permit. But as I said, the previous owners are willing to sell us their plans. The soil report and the permit were already provided to us during the purchase process. I would now have to pay for the other documents.Unfortunately, I’m not managing to use the geoportal. This is the only thing I could get out of it, maybe it helps to visualize it better.
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hanghaus202326 Sep 2024 10:53Thank you.
Who owns plot 744?
In the BayernAtlas, you can use a measuring tool to measure distances, and the system then displays the elevation profile as well.
Who owns plot 744?
In the BayernAtlas, you can use a measuring tool to measure distances, and the system then displays the elevation profile as well.
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hanghaus202326 Sep 2024 11:08That is possible with yours as well. First
then
then
then trace the respective boundaries. After that, take a screenshot.
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