ᐅ Construction of a 144 sqm bungalow in Fichtenwalde (near Potsdam)
Created on: 16 May 2021 18:56
A
Acof1978
Then I would also like to introduce our building project here and keep you updated.
First, a brief introduction about us. He (42.5 years; controller in healthcare), she (38.5 years; full-time teacher), child (8.75 years; fully dependent). Our household net income is currently about €6,400 (approximately $6,800) plus performance bonuses, 13th-month salary, overtime, etc. We own a 1,462 sqm (15,735 sq ft) plot of land in Fichtenwalde. The remaining debt on the land is €37,000 (about $39,000). According to official land value guidelines, the land is valued at €146,200 (about $156,000) (€100 / sqm). The market price is around €400,000 to €600,000 (recent sale prices). We submitted the building permit application including the land conversion at the end of December. We expect approval by mid to late July.
The construction company is KB Brandis from Jüterbog. External site supervision will be handled by Bauherrenhilfe with 13 appointments.
Now about the house. It will be a 144 sqm (1,550 sq ft) bungalow plus a 12 sqm (130 sq ft) covered terrace with the following additions:
- Ceiling height 3.00 m (9.8 ft)
- Electric roller shutters (including smart home integration)
- Double-sided laminated windows (wood-colored; RC3 security rating)
- Brine-to-water heat pump with ground collectors due to water protection area (Bosch Compress 7800i LW)
- Hydraulic balancing of the underfloor heating
- Controlled residential ventilation with heat recovery (Bosch)
- Motion detectors from a security company
- 13 kWp photovoltaic system, including battery preparation
- 10 m³ (2,650 gal) cistern for rainwater use
- Doorbell with video function
- Wallbox preparation for electric vehicle charging
- Exterior lighting
Floor plan attached.
We have not yet finalized financing (although discussions have taken place). So far, we have invested up to €30,000 (approximately $32,000) from our own savings during the planning phase. This is almost all of our equity. However, we continue to save about €2,750 (approximately $2,920) per month. The monthly mortgage payment is expected to be around €1,650 (about $1,750) plus additional costs of approximately €200-250 (about $210-265) (taking into account the photovoltaic system). This means when we move into the house, we will still have savings of at least €1,500 (about $1,590) per month.
The construction contract will be signed within the next few weeks. The prices (recently discussed with the company) correspond to the offer and commitment as of September 2020.
The price per square meter of the house (according to the latest offer and full specification) will be €2,700 (about $2,870). This includes everything, such as painting, flooring, etc. The overall costs are structured as follows:
House: €378,000 (about $402,000)
Land conversion including reclassification: €25,000 (about $26,600)
Additional building costs: €40,000 (about $42,500)
Outdoor facilities: €25,000 (about $26,600)
Total financing volume: €468,000 (about $498,000)
First, a brief introduction about us. He (42.5 years; controller in healthcare), she (38.5 years; full-time teacher), child (8.75 years; fully dependent). Our household net income is currently about €6,400 (approximately $6,800) plus performance bonuses, 13th-month salary, overtime, etc. We own a 1,462 sqm (15,735 sq ft) plot of land in Fichtenwalde. The remaining debt on the land is €37,000 (about $39,000). According to official land value guidelines, the land is valued at €146,200 (about $156,000) (€100 / sqm). The market price is around €400,000 to €600,000 (recent sale prices). We submitted the building permit application including the land conversion at the end of December. We expect approval by mid to late July.
The construction company is KB Brandis from Jüterbog. External site supervision will be handled by Bauherrenhilfe with 13 appointments.
Now about the house. It will be a 144 sqm (1,550 sq ft) bungalow plus a 12 sqm (130 sq ft) covered terrace with the following additions:
- Ceiling height 3.00 m (9.8 ft)
- Electric roller shutters (including smart home integration)
- Double-sided laminated windows (wood-colored; RC3 security rating)
- Brine-to-water heat pump with ground collectors due to water protection area (Bosch Compress 7800i LW)
- Hydraulic balancing of the underfloor heating
- Controlled residential ventilation with heat recovery (Bosch)
- Motion detectors from a security company
- 13 kWp photovoltaic system, including battery preparation
- 10 m³ (2,650 gal) cistern for rainwater use
- Doorbell with video function
- Wallbox preparation for electric vehicle charging
- Exterior lighting
Floor plan attached.
We have not yet finalized financing (although discussions have taken place). So far, we have invested up to €30,000 (approximately $32,000) from our own savings during the planning phase. This is almost all of our equity. However, we continue to save about €2,750 (approximately $2,920) per month. The monthly mortgage payment is expected to be around €1,650 (about $1,750) plus additional costs of approximately €200-250 (about $210-265) (taking into account the photovoltaic system). This means when we move into the house, we will still have savings of at least €1,500 (about $1,590) per month.
The construction contract will be signed within the next few weeks. The prices (recently discussed with the company) correspond to the offer and commitment as of September 2020.
The price per square meter of the house (according to the latest offer and full specification) will be €2,700 (about $2,870). This includes everything, such as painting, flooring, etc. The overall costs are structured as follows:
House: €378,000 (about $402,000)
Land conversion including reclassification: €25,000 (about $26,600)
Additional building costs: €40,000 (about $42,500)
Outdoor facilities: €25,000 (about $26,600)
Total financing volume: €468,000 (about $498,000)
In der Ruine29 Apr 2022 09:27Neubau2022 schrieb:
We already discussed the temperatures for the individual rooms in advance. They will be around 19-21 degrees Celsius (66-70°F).Bold choice. For me, that would immediately lead to a divorce. For my wife, a living room below 22-23°C (72-73°F) is out of the question. Children’s rooms should also be comfortably warm, and I haven’t even mentioned the bathroom yet.
N
Neubau202229 Apr 2022 09:33In der Ruine schrieb:
Bold move. In my case, that would immediately lead to a divorce. A living room below 22-23°C (72-73°F) is just not acceptable to my wife.
The children's rooms also need to be comfortably warm, and I haven’t even mentioned the bathroom yet. If necessary, a space heater will be added to the room 😎
Neubau2022 schrieb:
In case of emergency, a space heater will be placed in the room 😎Well, you can also design for a warmer temperature and then throttle back the heating circuit. That would be my recommendation. Everything at 22°C (72°F), bathroom at 24°C (75°F). It can always be colder. It hardly makes any difference for sizing the heat pump.
N
Neubau202229 Apr 2022 09:47OWLer schrieb:
Well, you can also design for a higher temperature and then throttle the heating circuit. That would be my recommendation. Everything at 22°C (72°F), bathroom at 24°C (75°F).
Colder is always possible. It hardly makes a difference when sizing the heat pump. In our family, we hardly use heating. We prefer fresh air rather than needing it very warm. And as my grandmother always said: "If you’re cold, then put on something warm" 😎
H
Hausbau 5529 Apr 2022 10:24OWLer schrieb:
They are the same here.
Basically, I would request the heating load calculation “for the documentation.” A target temperature of 35°C (95°F) is really not that high.
It will work, and you can’t always optimize everything during construction. That just gets old. 13 heating circuits for 144 sqm (1,550 sq ft)? I find that too few. We have 13 heating circuits for 90 sqm (970 sq ft). Pay attention to the pipe diameter from the heat pump to the heating circuit manifold. Don’t install any bottlenecks here; use a sufficiently large pipe diameter.
According to some experts, reducing the flow temperature by 1 degree means an efficiency increase of 2.5%. So, lowering the flow temperature from 35°C to 31°C (95°F to 88°F) results in an efficiency gain of 10%. Even an 8% improvement would already be a good result.
You mentioned that the screed will be poured soon. So, the underfloor heating needs to be installed beforehand. For this, the heating engineer requires the heating load calculation to install the underfloor heating! Keep in mind that mistakes in designing the underfloor heating will stay in the house forever. You can always replace your heat pump, but not your underfloor heating.
For the design, we chose 22°C (72°F) in the bathroom and 21°C (70°F) in the other rooms. The pipe spacing is 11 cm (4.3 inches) everywhere, except in the bathroom where it is 5.5 cm (2.2 inches), including under the shower and bathtub.
How much output does your heat pump provide? From my perspective (assuming a correct calculation), 5, maximum 6 kW should be sufficient.
Hausbau 55 schrieb:
13 heating circuits for 144 sqm (1,550 sq ft)? I think that’s too few. We have 13 heating circuits for 90 sqm (970 sq ft). I’d prefer the 144 sqm (1,550 sq ft) as a three-room apartment rather than a bungalow.
By the way: his place is practically finished, so there’s no need to bring up possible/further optimizations.
The next step will be someone asking why not kfw40, then kfw40+, then Passive House…
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