What is a sensible house construction planning process?

We have decided to build because existing properties here are only sold at astronomical prices and you still have to renovate or refurbish. Unfortunately, since no one in the family/friend circle has current construction experience, we are still a bit overwhelmed with everything. We want to build a turnkey prefabricated house because we are not craftsmen and do not have enough knowledge to contract trades separately. We are planning with 100k for the land. Is then 250k-300k for a turnkey house with a basement and 150-160 sqm (including kitchen) feasible? And not quite the basic equipment, but a medium level? Energy efficiency is very important to us, so we tend to opt for a ground-source heat pump with a ventilation system and heat recovery, and solar or photovoltaic support; in any case, we want to be independent of fossil fuels. Is that feasible within the budget? Overall, we want to come out with ancillary building costs at a maximum of 450k. So, what is now the best further procedure? We have already chosen suitable floor plans. Today we are going to the Fertighaus Welt in Nürnberg. How do we find the right provider? Submit plans and request quotes from every suitable one? Construction service description? And how do you compare the construction service descriptions if you have little knowledge? We already have a few catalogs at home and only one provider has ever sent us 2 construction service descriptions and detailed price lists. That reads quite nicely but for novices it’s like Chinese... Are there perhaps recommended checklists? That we can follow? Oh yes, and what funding opportunities are there? Many thanks in advance!

If you like, I can tell you a little, pick out what suits you. In January 2016 a decision was made. Our REH is being sold. For living in old age, we no longer want the stairs. The sale went quickly. 3 weeks, it was gone. Temporary solution: rental apartment. We planned: bungalow, 4 rooms, no open kitchen, bathroom and guest WC, no basement. That was the specification sheet at first. We also planned: This will probably be found second-hand as well. Not a chance. We didn’t find anything. And if, then either in bad condition or super expensive. Like you, the wish for a new build grew. We then first looked at plots in a development area in our city. Several were available, all with a slight slope, all with flawless soil reports, some even with lake view. Three made the shortlist because of size, layout, possibility of a southwest terrace facing away from the access path. Then you can also sunbathe naked on the lounger. Site coverage ratio 0.25. With a friend who has a landscaping company (GALA), we decided on our plot because he advised it due to manageable earthwork effort. - First step done. Now the house. It was summer 2016 then. Where to start? First, we looked at prefab houses. All always with open kitchens, all always floor plans that we did not like. Prices that made us ask: Why prefab house anyway? What do you save? Nothing. The matter was set aside. To really close it, all catalogs went into recycling. Now only solid house providers offering turnkey construction remained in the running. Both regional. One, a larger one from the Schleswig area. And a smaller one only 20 km away from us. Both have a good reputation, both are considered inexpensive. We calculated our house with both now. This can no longer be done by email and phone, but you sit together then. Now feelings come in. With the general contractor 20 km away, we felt better taken care of. (Example: He advised 100 cm doors, you will get older, rollator! He advised a 30-degree roof with studio trusses, stairs up, tongue and groove floor upstairs, 1 Velux, gives a great basement replacement 50 sqm for 10k. Gross)) He inspected our plot, for example, and told us what earthwork effort to expect. He showed alternatives. Sometimes contradicted and said: I would build differently. We discussed heating, KFW 55 or not, we discussed walls, windows, garage or carport etc. etc. In short, he took significantly more time for us than the other, and in the end there was a house at a price where we said: That fits. Hand on it. - Then to the bank... which said yes. And off to the district building authority with it. Result: Chemistry has to fit. Advice must be plausible and sincere. Advice also means being talked into or out of something sometimes. Questions. If it says slab in concrete C25, then ask him or Wikipedia what that means! Fiber-reinforced screed: Ask what the alternative would be. Heating, technology. Don’t commit yourself. Ask what costs what, what is economically sensible not in Hanover, but where you will build.

It starts with visits to show homes. Develop a taste for yourselves. What is important, nice-to-have, no-go. Develop a sense for size and spaces.

The problem is that you don’t have a plot yet. If you are aiming for personal consultation, the salespeople are rather short with you because construction only becomes really tangible with the availability of a plot, and the time for these conversations is usually not fruitful for companies.
Additionally, you should/can’t commit to one type of house because the development plan of the future plot regulates which type (e.g. gable roof house, two-story or floor area ratio) can be built.
With 300,000 you can already build a nice house, but you will most likely have to decide whether to build a basement or a house with lots of technology installed.
On a sloping plot, one tends to build with a basement; you can also live very well without photovoltaics.

1,800-1,900 per sqm of living space in mid-standard for kfw70/Energy Saving Ordinance 2016 are certainly to be expected. Additionally, kitchen, ancillary construction costs, basement, outdoor facilities, painting and flooring, and surcharge for kfw55. And a lot of incidental costs like new lamps, lawn mower. You see, you calculate...

So, I don’t see where you want to build yet, only infer proximity to Nürnberg, but where used properties are sold at astronomical prices, general construction costs are not cheap either.

P.S. Prefabricated house catalog prices are comparable to a small Polo with a small engine and no equipment – on slab means: either on an additional basement or additional slab.

Take a very close look here at the building costs section

Regards

You can also read from the initial post that ecological aspects matter to you as well. But keep in mind that it does not start with the technology. A house always needs energy. Whether gas or electricity, heat pump heating systems of all kinds require it, sometimes even for additional heating, not just for the pump itself. So first plan so that as little energy as possible is needed to have a warm house. That means rectangular, not L or U shaped. Few windows to the north, a lot of wall. Glass is welcomed to the southwest. Few floor-to-ceiling windows. Walls always insulate better than glass. This building form is also the more economical one. It saves complicated roof constructions and has few corners and angles, which saves bricks and especially labor costs. Keep in mind, a masonry crew of four people costs about €40 per hour per person, roughly €1400 net per day. So if your shell construction takes 5 days instead of 7 days... then you have a set of solar cells left over. In the construction service descriptions, the price traps for tiles and such should be around €25 per sqm. Electrical, two telephone sockets, for four rooms about 45 power outlets, two TV outlets, an underground cable outside would be a proper standard for me. Has sewage, rainwater connection been calculated? Does it include application for the building permit, applying for connections to the development facilities? Construction electricity, water, portable toilet? Is it included that the site is planned ready for landscaping, of course without soil removal, as that is billed according to effort? Which roof tiles? Braas Harzer Pfanne or is a moss-resistant Braas Doppel S also included? If plastered, is painting the facade included? Read carefully, if Scanhaus Marlow, for example, has no standard floor coverings, I deduce from that, no floor tiles either. Wall construction, that is now a matter of taste. I would not take one with a lot of Styrofoam and such. If prefabricated house, then clay lightweight aggregate walls.

Feasible within the budget?

No.

If prefabricated house, then clay aggregate walls.

Out promoting yourself ...?