ᐅ New Single-Family Home Construction in Southern Germany

Created on: 18 Nov 2020 00:43
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WilderSueden
Hello everyone,
after jumping straight into the basement discussion thread, I want to use this one as an introduction and idea-sharing thread. Some things might seem a bit chaotic at first, but that will surely clear up.

We are expecting our first child in February. Since two rooms are obviously too few for the long term, we need something larger. The housing market here in Konstanz is notoriously difficult, so we didn’t spend much time searching here. Thanks to Corona home office, we focused on areas a bit further away right from the start. Initially, we looked mostly at existing properties, but due to the poor condition of what’s on offer, we unexpectedly ended up deciding to build. We were actually lucky to get a plot in a new development area around Stockach-Pfullendorf. The site started being developed this week and will probably be buildable from summer onward.

Here are some key details:
- He/I am 33, work in the software industry, based in Konstanz, from a rural area
- She is 41, a teacher in the Hegau region, from a city that basically doesn’t exist
- One child on the way, no further children planned and unlikely due to her age
- Currently living in about 65sqm (700 sq ft) with 2.5 rooms in a lovely apartment building…
- Basically, we don’t want anything too fancy—no extensive smart home automation, no luxury mansion with marble and so on. Just something solid and nice. We are not building to fulfill a lifelong dream but to avoid renovating an old house worth half a million euros. Plain wallpaper texture and laminate flooring would be fine for us if the quality is good.
- Accordingly, we don’t mind using a “standard” floor plan from a prefabricated house builder or a typical model home.
- That said, since we are building, it should be energy efficient and we don’t want to use concepts that might soon be politically outdated or unsupported.
- Do-it-yourself work only to a limited extent, as we are neither professionals nor do we have relevant contacts. Also, the new house is a bit further away, so working on it in the evening is unlikely. A weekend of painting before moving in is no problem, and after moving in, doing the carport, terrace, and garden ourselves is also fine.
- The construction partner must be reliable.

Plot and financials:
- Plot roughly 700sqm (7,535 sq ft) at 98€ per sqm → 70,000€, fairly rectangular
- 120,000€ equity (with some reserve left)
- Financing and ownership entirely in my name (unmarried and no joint assets intended)
- Planned overall budget about 500,000€
- Target monthly payment 1,500€
- Accordingly, loan to be repaid in 25 years with that rate, with some extra repayments planned mid-term aiming for about 20 years total

Budget breakdown:
- Plot 70,000€
- Ancillary plot costs 5,000€
- Other construction-related fees 60,000€
- Basement 50,000€
- Kitchen 10,000€
- Driveway, carport, terrace as DIY 15,000€
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210,000€
Leaves about 290,000€ in the budget for the house itself, which is probably quite tight for what we have planned. The budget still needs to be adjusted with a buffer.

So far, our wishlist looks roughly like this:
- Not excessively large, more like 120–130sqm (1,290–1,400 sq ft)
- Efficient, modern house
- Photovoltaic system (possibly with battery storage)
- Underfloor heating with heat pump
- Home office for me on the ground floor (makes sense since I mostly work from home)
- Bedroom upstairs, one office for her that also serves as a guest room and reserve nursery
- Large open-plan kitchen/living area
- Basement
- Cistern
- Carport for two cars and one trailer

Our first contact about building was through an ad from the local Town & Country partner. The consultant was friendly, and the show house in Geisingen looked quite nice, but somehow it all felt a bit too conservative. Built according to the Energy Saving Ordinance 2016, standard gas heating. Sure, upgrades are possible, but I’m not sure if a heat pump makes sense under that regulation anymore. The fact that the show house had cracks in the plaster here and there isn’t exactly reassuring either. But the base price is lower. Current status: two meetings, visited the show house, haven’t requested the scope of services yet.

Then we looked a bit into prefab houses. Most offer KfW55 standard, which is closer to what we want and would be a good base for going to KfW40+ since a photovoltaic system is already planned (probably just with battery preparation though). Visited the park in Villingen-Schwenningen. Had a long chat with Schwabenhaus; the consultant seemed to want to downplay costs and was very keen to sell a ground-source heat pump with boreholes. The upgrade options for the promotional houses looked likely to increase costs significantly. Visited Heldhaus, liked it quite a lot but their cost outline overshoots the budget by roughly 100,000€.

Today we had an appointment with Schwörerhaus. The floor plan of one of their promotional houses fits pretty well. Basement plus KfW40+ seems somewhat challenging in combination. Otherwise, a generally good impression; the briefly reviewed scope of services doesn’t give the impression the house would be unpleasant to live in. Let’s see what the first offer will look like. I don’t get the feeling there’s much that could go wrong there.

Next week we have an appointment with Weberhaus. We found a floor plan we really like. The price is initially the highest, but their examples include KfW40+ standard and smart home automation upfront.

Our goal is to narrow down the number of companies we continue with to a maximum of two by Christmas and then decide on a construction partner early next year. In spring, the baby will take priority, not just house planning.

I’ve already posted some thoughts about the basement and possible basement substitutes. The insulation costs for the basement seem to fully consume the additional subsidies, so the photovoltaic battery would have to be paid out of pocket again. One idea on the drive back from the appointment was whether it makes sense to build the house initially to KfW55 standard without extra insulation. The difference in heating costs is relatively small. Then install just the conduit pipes for photovoltaics with battery preparation. A few years later, add a battery once prices drop. That would also likely bring the house closer to the planned budget than going for KfW40+.

These are my thoughts so far. Have I missed anything important?
Hausbau081521 Dec 2020 20:39
Sorry, but I can’t make any sense of your plan. To me, it looks like accommodating vehicles on the property is more important to you than the actual house layout. You’ve already set the path to the house at 1 meter (3 feet) wide, drawn the front door at 0.50 meter (20 inches), and the entrance area is only 1.50 meters (5 feet) wide. The house has no windows, no room doors, and no cloakroom area. Or do you plan to keep your outdoor shoes in the storage room, because with just 1.50 meters (5 feet) there’s really no space left. Unfortunately, I have to agree with 11ant’s opinion here—this is basically useless as it stands. Pick floor plans from house catalogs to see if there’s something suitable, or better yet, consult an architect. You can’t really avoid that anyway. Also, who will handle your building permit / planning permission?
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WilderSueden
21 Dec 2020 20:56
I believe there’s a misunderstanding. The plan was never meant to detail the interior of the house but to provide a rough overview of how everything is positioned on the property. The only thing that is to scale are the exterior dimensions of the house. For each floor plan considered, we created a house template and roughly sketched the rooms so we could visualize where the house would be placed, whether it makes sense to rotate it, and if the house fits between the garage and the garden shed or not. The outdoor area is different; it has since moved beyond the template stage because, on one hand, it is relatively independent of the specific house, and on the other hand, there is much more flexibility possible. As mentioned, until now, we have mainly worked with ready-made floor plans, which I don’t need to fully redraw—just a rough room layout is enough to see if the carport is right in front of the living room window or if the house touches the garage and the carport.

Whether the window in the study is moved one meter (3 feet) to the left or right, or exactly where the shoe cabinet is placed, it is far too early for that now. We haven’t even decided on a company yet, let alone whether it will be a solid construction or not.
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pagoni2020
21 Dec 2020 21:33
WilderSueden schrieb:

I think you’re misunderstanding something. The plan was never intended to design the interior of the house—that’s far too early for that now.

No. That is actually one of the first and most important steps.
WilderSueden schrieb:

The only dimension in scale on the house is the exterior measurements.

Wrong order. First the interior—how do I want to live? The exterior follows from that.
WilderSueden schrieb:

The landscaping is different; it’s long past the stencil stage by now.

You live INSIDE the house; that takes priority.
WilderSueden schrieb:

Whether the window in the study moves a meter (about 3 feet) to the left or right, or exactly where the shoe cabinet goes—that’s way too early to decide now.

Again... you’re getting it backwards. It’s a RESIDENTIAL house!
Hausbau081521 Dec 2020 21:39
Thank you for the explanation. I still don’t fully understand. You know the exterior dimensions of the house but not the floor plan yet? For us, it was the other way around. We designed the house according to the size of the rooms. Rotating the house also sounds odd. You should know which room is supposed to face which direction. A carport next to the living room window??? And whether the house fits between the garage and the garden shed? The way you are approaching this seems backwards. The interior layout is more important than the exterior because you live inside the house.
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WilderSueden
21 Dec 2020 22:13
Hausbau0815 schrieb:

I still don’t fully understand. You know the exterior dimensions of the house, but not the room layout yet?
As I said, so far we haven’t settled on a single floor plan but have looked at several options from different providers to see what suits us, then placed them on the plot. A 10x10 m (33x33 ft) size feels very different compared to 8x12 m (26x39 ft) or 9x9 m (30x30 ft) with an extension. And even within the same exterior dimensions, there are often various floor plan options in the same catalog.
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pagoni2020
21 Dec 2020 22:24
WilderSueden schrieb:
As I said, until now we didn’t have a fixed floor plan but looked at several providers to see what we liked and placed those on the plot. A 10m x 10m (33ft x 33ft) layout is quite different from 8m x 12m (26ft x 39ft) or 9m x 9m (30ft x 30ft) with an extension. And even within the same exterior dimensions, there are often different floor plans in the same catalogue.
That is exactly what you should change. The sequence of that...