I am currently in the very early planning stage of building our own home and need some help gathering and estimating the ongoing costs that come with such a house after construction. Basically, I want to find out how much of our net income will ultimately remain after deducting all ongoing costs, so that, for example, we can determine how much is left to cover loan repayments.
A few key details about the planned project:
- Passive house (semi-detached)
- Approximately 150m² (1,615 sq ft) living space, spread over 2 full floors
- Approximately 430m² (4,630 sq ft) plot size
- Garage
- Initially two adults and a newborn, with a second child planned
- Local multiplier (for property tax / ground tax) currently 471
From my own research, I’ve identified the following monthly cost items (all converted to a monthly basis):
- Property tax: max. €37.50 (I contacted the tax office and was told that property tax cannot be reliably estimated at such an early planning stage, but I should expect no more than €450/year)
- Electricity costs: approx. €150 (it is not easy to find reliable figures on electricity consumption of passive houses; online sources vary between 4,000 and 7,000 kWh/year. I decided to calculate with a rather high estimate of 6,400 kWh)
- Water: about €15 (assuming a consumption of 120m³ (4,240 cu ft) per year)
- Heating: €0 (a conventional heating system is not needed in a passive house, and hot water production and backup heating are usually electric. These additional costs are included in the electricity estimate)
- Waste collection: €26
- Sewage: €32
- Contents insurance: €15 (I simply used a comparison website and took the average price for coverage of €100,000)
- Building insurance: €25 (similar to the contents insurance)
- Reserves for repairs, etc.: €150 (simply the commonly cited one euro per square meter)
The following two points are not directly related to the house itself but, in my opinion, still belong among the ongoing costs:
- Internet + phone + TV: €55
- Public broadcasting fee (GEZ): €17.50
(I have tended to estimate on the safe side and rounded these numbers up where I was not able to get precise figures.)
All in all, this adds up to ongoing costs of about €523 per month. Now my questions to you experts here:
- Which ongoing costs have I not yet accounted for?
- Where have I gone wrong in my calculation or used completely implausible figures?
Thank you very much in advance!
A few key details about the planned project:
- Passive house (semi-detached)
- Approximately 150m² (1,615 sq ft) living space, spread over 2 full floors
- Approximately 430m² (4,630 sq ft) plot size
- Garage
- Initially two adults and a newborn, with a second child planned
- Local multiplier (for property tax / ground tax) currently 471
From my own research, I’ve identified the following monthly cost items (all converted to a monthly basis):
- Property tax: max. €37.50 (I contacted the tax office and was told that property tax cannot be reliably estimated at such an early planning stage, but I should expect no more than €450/year)
- Electricity costs: approx. €150 (it is not easy to find reliable figures on electricity consumption of passive houses; online sources vary between 4,000 and 7,000 kWh/year. I decided to calculate with a rather high estimate of 6,400 kWh)
- Water: about €15 (assuming a consumption of 120m³ (4,240 cu ft) per year)
- Heating: €0 (a conventional heating system is not needed in a passive house, and hot water production and backup heating are usually electric. These additional costs are included in the electricity estimate)
- Waste collection: €26
- Sewage: €32
- Contents insurance: €15 (I simply used a comparison website and took the average price for coverage of €100,000)
- Building insurance: €25 (similar to the contents insurance)
- Reserves for repairs, etc.: €150 (simply the commonly cited one euro per square meter)
The following two points are not directly related to the house itself but, in my opinion, still belong among the ongoing costs:
- Internet + phone + TV: €55
- Public broadcasting fee (GEZ): €17.50
(I have tended to estimate on the safe side and rounded these numbers up where I was not able to get precise figures.)
All in all, this adds up to ongoing costs of about €523 per month. Now my questions to you experts here:
- Which ongoing costs have I not yet accounted for?
- Where have I gone wrong in my calculation or used completely implausible figures?
Thank you very much in advance!
B
Bieber08154 Aug 2017 11:02Therefore, it makes sense to consider household electricity separately from everything else (e.g., as "heating" or hot water, etc.).
The mechanical ventilation system consumes electricity costing about 80 euros per year (measured with a "smart" plug).
The mechanical ventilation system consumes electricity costing about 80 euros per year (measured with a "smart" plug).
W
Weird_Wookie4 Aug 2017 11:56Bieber0815 schrieb:
That’s why it makes sense to consider household electricity separately from everything else (for example, as "heating" or hot water, etc.).
Our mechanical ventilation system with heat recovery uses about 80 euros per year in electricity (measured with a "smart" plug).Thank you for the advice/tip. Do you have a passive house? If so, what is its size and how many people live in it (to put your 80 euros/year for the mechanical ventilation system into context)?
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