ᐅ With or without KfW70? How much additional cost does KfW70 involve?
Created on: 21 Sep 2013 12:34
P
Petri
Hello everyone,
I have the following questions and maybe someone can help me with them:
We are in the process of planning a house. After already receiving help and answers here regarding the floor plan and realistic costs, we are now considering another topic.
Build with or without KfW 70 standard?
– for approximately 149 m² (1600 sq ft) of living space, underfloor heating, and an air-source heat pump, solid construction house
How much extra would it cost to build according to the KfW 70 standard? Is there a general estimate, or a guideline figure?
Or would a standard energy-efficient house (according to the Energy Saving Ordinance 2014 in our case) be sufficient?
Best regards,
Petri
I have the following questions and maybe someone can help me with them:
We are in the process of planning a house. After already receiving help and answers here regarding the floor plan and realistic costs, we are now considering another topic.
Build with or without KfW 70 standard?
– for approximately 149 m² (1600 sq ft) of living space, underfloor heating, and an air-source heat pump, solid construction house
How much extra would it cost to build according to the KfW 70 standard? Is there a general estimate, or a guideline figure?
Or would a standard energy-efficient house (according to the Energy Saving Ordinance 2014 in our case) be sufficient?
Best regards,
Petri
Hi
In my opinion, KfW 70 is relatively easy to achieve.
A sustainable energy component is required anyway according to the 2009 Energy Saving Ordinance. The most cost-effective and efficient option is solar thermal systems for domestic hot water. This means the primary heat generator doesn’t have to work from April to October.
With the right choice of materials for the exterior walls, the requirements can be met economically. For us, increasing the wall thickness from 30 cm (12 inches) to 36.5 cm (14 inches) meant no additional insulation was needed, at a cost of about 2000 EUR.
The location of the house and the arrangement of windows also play an important role. The extra cost for better windows is manageable, but you shouldn’t expect a glass palace. South-facing windows are beneficial; north-facing windows are less favorable.
An insulated ground slab is usually necessary as well, which cost us under 2000 EUR.
A controlled ventilation system is always recommended; we also included heat recovery.
The additional cost for KfW 70 compared to a standard build for our 100 m² (1,076 sq ft) bungalow was about 7500 EUR. With rapidly rising energy prices, we will probably recoup that much sooner than we’d like…
In my opinion, KfW 70 is relatively easy to achieve.
A sustainable energy component is required anyway according to the 2009 Energy Saving Ordinance. The most cost-effective and efficient option is solar thermal systems for domestic hot water. This means the primary heat generator doesn’t have to work from April to October.
With the right choice of materials for the exterior walls, the requirements can be met economically. For us, increasing the wall thickness from 30 cm (12 inches) to 36.5 cm (14 inches) meant no additional insulation was needed, at a cost of about 2000 EUR.
The location of the house and the arrangement of windows also play an important role. The extra cost for better windows is manageable, but you shouldn’t expect a glass palace. South-facing windows are beneficial; north-facing windows are less favorable.
An insulated ground slab is usually necessary as well, which cost us under 2000 EUR.
A controlled ventilation system is always recommended; we also included heat recovery.
The additional cost for KfW 70 compared to a standard build for our 100 m² (1,076 sq ft) bungalow was about 7500 EUR. With rapidly rising energy prices, we will probably recoup that much sooner than we’d like…
B
Bauexperte27 Sep 2013 14:06Hello,
Regards, Bauexperte
Explosiv schrieb:No one has convinced me of the usefulness of such a measure, if by "insulated" foundation slab you mean insulation beneath the slab.
An insulated foundation slab is usually necessary as well, costing us less than 2000 EUR.
Explosiv schrieb:If I were you, I wouldn’t be so enthusiastic that these measures alone are sufficient without any further steps 😉
A controlled ventilation system is also always recommended. In our case, heat recovery was added on top of that.
Additional costs for KFW 70 compared to the standard for our 100 m² (1,076 sq ft) bungalow were about 7500 EUR.
Regards, Bauexperte
B
Bauexperte27 Sep 2013 14:12Hello Perlenmann,
Yes, you should always consider the "potential" resale value.
It’s not about automatically getting 15,000 more in return later on, but about avoiding having to settle for far less than the construction cost without much choice 😉
I know from friends who are real estate agents that they hardly want to list houses built before 2000 anymore. And in a few years, the same will apply to houses built solely according to the Energy Saving Ordinance. Except for premium properties… those can be marketed based on other factors; usually distributed differently…
Best regards, Bauexperte
perlenmann schrieb:
I also don’t think the resale argument counts, because of the aforementioned interest rates. You would probably have to get at least 15,000 more when selling a KFW70 house. But the price of a house is more determined by demand than by a piece of paper.
Yes, you should always consider the "potential" resale value.
It’s not about automatically getting 15,000 more in return later on, but about avoiding having to settle for far less than the construction cost without much choice 😉
I know from friends who are real estate agents that they hardly want to list houses built before 2000 anymore. And in a few years, the same will apply to houses built solely according to the Energy Saving Ordinance. Except for premium properties… those can be marketed based on other factors; usually distributed differently…
Best regards, Bauexperte
P
perlenmann27 Sep 2013 14:26I’m not sure, but here a used house from the 1930s to 1970s with significant renovation backlog (admittedly almost twice the size) costs roughly the same as my complete new build. So I’m not worried about the resale value.
But that’s kind of like a fixed interest rate for 5, 10, or 20 years—you’ll find different approaches to that.
What I actually wanted to say is that I wouldn’t just look at the “70” on paper, but at the purpose behind the measure to achieve that “70”!
Since I can see from my heat pump how much hot water production affects energy needs compared to heating demand, in my opinion it’s ridiculous to spend a few thousand euros on the roof for that! I’d rather invest in controlled mechanical ventilation.
But that’s kind of like a fixed interest rate for 5, 10, or 20 years—you’ll find different approaches to that.
What I actually wanted to say is that I wouldn’t just look at the “70” on paper, but at the purpose behind the measure to achieve that “70”!
Since I can see from my heat pump how much hot water production affects energy needs compared to heating demand, in my opinion it’s ridiculous to spend a few thousand euros on the roof for that! I’d rather invest in controlled mechanical ventilation.
Bauexperte schrieb:
Yes, you should always consider the "potential" resale value.
I know from friends who are real estate agents that they hardly want to list houses built before the year 2000 anymore. And something similar will apply in a few years for houses built solely according to the energy saving regulations. Except for the showpieces... those can be marketed based on different criteria; usually they sell quickly...
Regards, Bauexperte Around here, everything gets sold—no matter how old or poorly renovated it is. In the Munich area, for now hardly anyone cares whether it meets KFW70 standards or anything like that.
B
backbone2328 Sep 2013 14:50Munich is currently just being hyped up; sooner or later, the real estate market there will change again. But above all, Munich is not the be-all and end-all.
Similar topics