ᐅ Cost Planning
Created on: 29 Apr 2016 21:27
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Becker84
Hello,
I will most likely buy a plot of land next week and am therefore just at the very beginning.
A financing inquiry is in progress, and an appointment with a structural engineer is already scheduled.
The plot is 630m² (6,780 sq ft) in size, with a site coverage ratio of 0.3.
I have the option to build to KfW 70, 55, or 40 standards (preferably 40+). KfW 70 is the minimum standard nowadays, so no funding is available for that level.
Ideally, I would like to be completely independent of electricity and gas, so a 40+ standard with photovoltaic panels plus battery storage and a heat pump.
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One thought I had: Is it possible to do without a heat pump and instead invest more in photovoltaic panels, so that heating is done purely electrically?
I noted down the data from the photovoltaic system at my workplace:
Maximum inverter output: 14.6kW (May).
Energy yield during the summer months is 1700–1900 kWh/month.
In the heating-intensive winter months, 160–300 kWh/month.
Now I wonder if a 55 or 40 standard house can get by with 80–150 kWh per month for heating energy?
Electrical energy from photovoltaics can be converted to heat almost without losses, and thanks to phase shifting in a passive house, it can be used without storage. The waste heat from the TV or refrigerator also contributes.
At my first meeting with a structural engineer, I mentioned this idea, and the answer was, “No one has thought of that yet... it would need to be calculated.” Apparently, there are other factors that negatively affect the calculations for fully electric heating.
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Next question: roughly how much does each house type cost at KfW 70/55/40?
1. Bungalow (Is it even possible to use the roof at KfW 40 standard?)
2. Two-story house with a gable roof – the ideal standard ;-)
3. Two-story house with a hipped roof – my favorite
Floor area about 120–130m² (1,290–1,400 sq ft).
At the first visit, I was told that with reasonable finishes (bathroom, tiles, etc.), the bungalow would be roughly €180,000. Number 3 would be around €350,000 at KfW 70.
I don’t want to do any work myself. Everything should be done perfectly.
Is this realistic?
Ideally, next to the house there should be a large double garage (€25,000?).
Is there a website where completed homeowners present their houses including all costs? That would really help me a lot.
Best regards,
Becker84
I will most likely buy a plot of land next week and am therefore just at the very beginning.
A financing inquiry is in progress, and an appointment with a structural engineer is already scheduled.
The plot is 630m² (6,780 sq ft) in size, with a site coverage ratio of 0.3.
I have the option to build to KfW 70, 55, or 40 standards (preferably 40+). KfW 70 is the minimum standard nowadays, so no funding is available for that level.
Ideally, I would like to be completely independent of electricity and gas, so a 40+ standard with photovoltaic panels plus battery storage and a heat pump.
-----------------
One thought I had: Is it possible to do without a heat pump and instead invest more in photovoltaic panels, so that heating is done purely electrically?
I noted down the data from the photovoltaic system at my workplace:
Maximum inverter output: 14.6kW (May).
Energy yield during the summer months is 1700–1900 kWh/month.
In the heating-intensive winter months, 160–300 kWh/month.
Now I wonder if a 55 or 40 standard house can get by with 80–150 kWh per month for heating energy?
Electrical energy from photovoltaics can be converted to heat almost without losses, and thanks to phase shifting in a passive house, it can be used without storage. The waste heat from the TV or refrigerator also contributes.
At my first meeting with a structural engineer, I mentioned this idea, and the answer was, “No one has thought of that yet... it would need to be calculated.” Apparently, there are other factors that negatively affect the calculations for fully electric heating.
-----------------
Next question: roughly how much does each house type cost at KfW 70/55/40?
1. Bungalow (Is it even possible to use the roof at KfW 40 standard?)
2. Two-story house with a gable roof – the ideal standard ;-)
3. Two-story house with a hipped roof – my favorite
Floor area about 120–130m² (1,290–1,400 sq ft).
At the first visit, I was told that with reasonable finishes (bathroom, tiles, etc.), the bungalow would be roughly €180,000. Number 3 would be around €350,000 at KfW 70.
I don’t want to do any work myself. Everything should be done perfectly.
Is this realistic?
Ideally, next to the house there should be a large double garage (€25,000?).
Is there a website where completed homeowners present their houses including all costs? That would really help me a lot.
Best regards,
Becker84
Becker84 schrieb:
When I first spoke to a structural engineer about this idea, the response was ‘no one has thought of that yet’..Hi,
No one has thought of that yet? I believe someone has. After a quick calculation, you’ll realize that at best, it’s something you can only convince yourself of.
There are months in winter when solar energy output is zero on many days. Bad weather. Snow covering the collectors, and so on.
What do you do then? Use electricity from the grid at 0.28 Euro to power a heating element? Or freeze and take cold showers?
A properly sized photovoltaic system designed to maximize self-consumption with a battery storage (40+ kWh), roughly 5–7 kWp: very practical. Add a small heat pump, preferably an air-to-water or ground-source heat pump, plus a decent domestic hot water tank, and the setup is sound and much better.
In our latitudes, a passive house is not fully passive but only passive on an annual average. That’s why the staff in the mentioned model house are freezing upstairs. I’m not surprised at all.
If you rely on waste heat from appliances like the refrigerator: I’m giving away my old one for free throughout the year since it heats the room quite well. 😉
Best regards,
Thorsten
As far as I know, KfW70 turnkey, excluding painting and floor covering work. On top of that, additional construction incidental costs amount to around 30,000–40,000 euros.
Of course, it really depends on what you want to include. You can quickly end up spending up to 2,000 euros per square meter (approximately 186 dollars per square foot). I just wanted to prepare you that you shouldn’t start planning based on the 1,150–1,250 euros per square meter (about 107–116 dollars per square foot) indicated in your example.
Take some time to read through the forum. @Bauexperte works in the industry and has posted prices for many building projects. Maybe you’ll find a similar project in your region. She is currently quite busy with her personal matters, so she can no longer provide prices for all building projects.
Of course, it really depends on what you want to include. You can quickly end up spending up to 2,000 euros per square meter (approximately 186 dollars per square foot). I just wanted to prepare you that you shouldn’t start planning based on the 1,150–1,250 euros per square meter (about 107–116 dollars per square foot) indicated in your example.
Take some time to read through the forum. @Bauexperte works in the industry and has posted prices for many building projects. Maybe you’ll find a similar project in your region. She is currently quite busy with her personal matters, so she can no longer provide prices for all building projects.
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Bauexperte11 May 2016 16:05Hello,
so many users have already shared extensive information about home construction and additional costs here; you should actually be able to use the search function ....
https://www.hausbau-forum.de/threads/liste-der-baunebenkosten.9737/
Regards, Bauexperte
so many users have already shared extensive information about home construction and additional costs here; you should actually be able to use the search function ....
https://www.hausbau-forum.de/threads/liste-der-baunebenkosten.9737/
Regards, Bauexperte
Interestingly, the additional KfW benefits are often calculated so that it takes about 30 years to recover the costs (with turnkey construction)... and as with everything: the last 10% is the most expensive.
Additional costs for us, including exterior landscaping, are around 40,000€ (about $43,000).
Additional costs for us, including exterior landscaping, are around 40,000€ (about $43,000).
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