ᐅ New Construction with a Separate Apartment: Solar Power – Electricity – Heating
Created on: 15 Jul 2024 22:21
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Tobi_SL
Hello,
I know some of my questions have been touched on in other threads but were never answered in detail. So here is my specific situation:
My wife and I want to build a single-family house on a slab foundation with an additional granny flat on the ground floor for my mother-in-law. We already have a plot of land (750 sqm (8,073 sq ft)).
Of course, we want a photovoltaic system on the gable roof with as many kWp on the south side as possible. I have read here that the system can only be connected to one electrical circuit. The granny flat would therefore be permanently connected to the external grid. That much is clear.
My main question concerns the heating system (air-to-water heat pump): Can the heat pump and the rest of the heating be powered entirely from the electricity of the main apartment (with photovoltaic)? Or does that also have to be split somehow?
We would, of course, like to use as much photovoltaic electricity as possible. If we were to rent the granny flat externally at some point, we would simply arrange a flat-rate rent including heating costs. Would that comply with legal requirements? Or does the electricity for heating costs also have to be accounted for separately?
One more thing in conclusion: I have noticed that prefab house providers often charge significant premiums for photovoltaic systems compared to the open market, and you often cannot choose components freely. On the other hand, it is said that a system planned directly by the builder along with the house is better integrated into the overall project. Would you still recommend contracting the photovoltaic system externally? What should be considered during house planning in this case to ensure the installation and integration go as smoothly as possible?
Thanks in advance!
I know some of my questions have been touched on in other threads but were never answered in detail. So here is my specific situation:
My wife and I want to build a single-family house on a slab foundation with an additional granny flat on the ground floor for my mother-in-law. We already have a plot of land (750 sqm (8,073 sq ft)).
Of course, we want a photovoltaic system on the gable roof with as many kWp on the south side as possible. I have read here that the system can only be connected to one electrical circuit. The granny flat would therefore be permanently connected to the external grid. That much is clear.
My main question concerns the heating system (air-to-water heat pump): Can the heat pump and the rest of the heating be powered entirely from the electricity of the main apartment (with photovoltaic)? Or does that also have to be split somehow?
We would, of course, like to use as much photovoltaic electricity as possible. If we were to rent the granny flat externally at some point, we would simply arrange a flat-rate rent including heating costs. Would that comply with legal requirements? Or does the electricity for heating costs also have to be accounted for separately?
One more thing in conclusion: I have noticed that prefab house providers often charge significant premiums for photovoltaic systems compared to the open market, and you often cannot choose components freely. On the other hand, it is said that a system planned directly by the builder along with the house is better integrated into the overall project. Would you still recommend contracting the photovoltaic system externally? What should be considered during house planning in this case to ensure the installation and integration go as smoothly as possible?
Thanks in advance!
Haus Luni schrieb:
We have even agreed with the tenant that they can set the utility costs higher, which provides them with tax benefits. We neither receive additional payments nor refunds for this. There is a separate meter for electricity. As a tenant, you can only claim deductions if you have a second residence or are self-employed, and then it does not matter whether it is rent or utility costs. The tax office requires you to provide a utility cost statement.
By law, utility costs must be charged based on actual consumption, which is certainly not a problem for the mother-in-law, but it will be for future rentals. Therefore, separate meters for electricity, cold and hot water, and heating are required. The second issue is what the tax authorities will accept during billing. What electricity price can be applied, which investments, etc.?
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nordanney16 Jul 2024 11:31Grundaus schrieb:
Legally, consumption-based ancillary costs are required,Basically yes (which I initially stated too quickly), but in the case of a granny flat or a two-family house (where the owner also lives), it can be waived. The only remaining issue is for the tax declaration.
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hanghaus202316 Jul 2024 13:11nordanney schrieb:
The only remaining issue is the tax return.I have always allocated based on square meters (m2) of living space. That is what my tax software requires. I have never had any problems.
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nordanney16 Jul 2024 13:31hanghaus2023 schrieb:
I have always allocated based on square meters of living space. That’s what my tax software requires. There has never been a problem. I understand the different options for input. Whether they are correct in the case of a gross rent without billing is another question. You can assume that the tax office will not come to check your documents and ask why you allocate based on square meters.
But as I said, this is a question that only a tax advisor can answer.
And in the case of dividing by square meters, the critic is less likely to be the tax office and more likely the tenant. Because if, in a two-family house, the rent is not inclusive, then the billing must also be based on actual consumption, if I’m not mistaken. However, there are also pragmatic tenants.
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