Hello,
we would like to build a one-and-a-half-story single-family house with about 125 sqm (1,345 sq ft) plus additional development space in the attic. Without a basement but with a 9 m (30 ft) garage.
We have a plot of land in sight, which we hope to reserve by May. We have already had several appointments with construction companies, including TaC, a developer from Krefeld, and one from Sonsbeck. I feel increasingly uncertain. Both developers offer roughly the same concept, but their prices differ significantly. One says that a ventilation system is not necessary for a KfW 55 solid construction house, while the other says it is very important. I am completely confused. Intuitively, the developer from Sonsbeck was our favorite—until we saw the cost estimate.
It is just too expensive! With TaC, the costs are within our budget, but opinions about the company are mixed.
Does anyone have experience in the NRW area?
Best regards
we would like to build a one-and-a-half-story single-family house with about 125 sqm (1,345 sq ft) plus additional development space in the attic. Without a basement but with a 9 m (30 ft) garage.
We have a plot of land in sight, which we hope to reserve by May. We have already had several appointments with construction companies, including TaC, a developer from Krefeld, and one from Sonsbeck. I feel increasingly uncertain. Both developers offer roughly the same concept, but their prices differ significantly. One says that a ventilation system is not necessary for a KfW 55 solid construction house, while the other says it is very important. I am completely confused. Intuitively, the developer from Sonsbeck was our favorite—until we saw the cost estimate.
It is just too expensive! With TaC, the costs are within our budget, but opinions about the company are mixed.
Does anyone have experience in the NRW area?
Best regards
You don’t need controlled residential ventilation or KfW 55 energy standard. However, you will need around 55 electrical outlets and about 20 switches. What do the suppliers offer you? You should choose underfloor heating, mainly because it allows flexible furniture placement along all walls. What is the additional cost? The foundation slab should be made of C25 concrete, and the screed should be fiber-reinforced. The windows can be white, but with 0.7 glazing values. A staircase made of beech is preferable; pine is too soft. Use titanium zinc for the gutters, not plastic. Tiles should preferably be 25 per square meter (sq ft) rather than 20—gross area. The sanitary fixtures should be standard but from a reputable brand. Gas heating is fine, but then go for Junkers, Viessmann, or Buderus. An outdoor water tap, underground cables, and an outdoor electrical outlet are must-haves. Also, two TV sockets and two telephone jacks.
Not only bathrooms but also hallways, kitchen, and utility rooms should be tiled. Wall tiles in bathrooms 1.60 meters (5.25 ft), in showers 2 meters (6.56 ft).
If you compare like this, where do you end up? Save on flashy extras, not on the building’s structure. Karsten
Not only bathrooms but also hallways, kitchen, and utility rooms should be tiled. Wall tiles in bathrooms 1.60 meters (5.25 ft), in showers 2 meters (6.56 ft).
If you compare like this, where do you end up? Save on flashy extras, not on the building’s structure. Karsten
T
toxicmolotof28 Apr 2017 22:52And we didn’t need a mechanical ventilation system with heat recovery to achieve KfW55 in Kaarst.
However, you should familiarize yourself with the basic terminology (and much more) before signing anything with anyone.
Town & Country is not exactly a luxury builder, and your developers are probably more general contractors or main contractors.
However, you should familiarize yourself with the basic terminology (and much more) before signing anything with anyone.
Town & Country is not exactly a luxury builder, and your developers are probably more general contractors or main contractors.
Nordlys schrieb:
You should choose underfloor heating, especially because it allows free placement of furniture along all the walls. What is the extra cost?If there is an additional charge for that, then this provider is definitely the completely wrong choice.
Controlled residential ventilation is definitely advisable if you cannot or do not want to open windows five times a day for 10 minutes each time. It’s not about saving energy, but rather about comfort, clean and fresh air, preventing mold, and avoiding formaldehyde and VOC exposure.
55 electrical outlets times two will give you a reasonable number. However, you can also discuss this directly with the electrician later. Remember to consider satellite connections, LAN, speaker channels, and so on as well.
The costs for higher-quality sanitary fittings, walk-in showers with linear drains, laminated windows, and similar features will certainly be added to both offers.
What you might want to check—this should be standard, but some low-cost providers overlook these details to offer a better price:
- Exterior plaster (silicone resin plaster, for example, is good; definitely avoid thin-layer mineral plaster)
- Mushroom-head lock on windows; warm edge spacer
- One or two threshold-free transitions to the terrace
- Supply water temperature and installation spacing? For example, we have 10–12 cm (4–5 inches) spacing and 30 to 32°C (86–90°F) as standard (!); some low-cost providers use closer to 15 cm (6 inches) spacing and 35°C (95°F)
- Porch roof
- Roof overhangs
- Roof structure: no truss roof! Use engineered timber roof structure (KVH)!
- Clay roof tiles!
- Frost protection skirts!
- Blinding layer (clean fill layer)!
- Do you have to paint any roof boxes/rafters yourself?
- Interior walls definitely not made of aerated concrete!
- I don’t really need to mention underfloor heating, right?
- Concrete slab 25 cm (10 inches)
If you compare all these points and, for example, the quality provider is missing one or two things while the low-cost provider misses most of them, then it’s clear where the price difference comes from.
55 electrical outlets times two will give you a reasonable number. However, you can also discuss this directly with the electrician later. Remember to consider satellite connections, LAN, speaker channels, and so on as well.
The costs for higher-quality sanitary fittings, walk-in showers with linear drains, laminated windows, and similar features will certainly be added to both offers.
What you might want to check—this should be standard, but some low-cost providers overlook these details to offer a better price:
- Exterior plaster (silicone resin plaster, for example, is good; definitely avoid thin-layer mineral plaster)
- Mushroom-head lock on windows; warm edge spacer
- One or two threshold-free transitions to the terrace
- Supply water temperature and installation spacing? For example, we have 10–12 cm (4–5 inches) spacing and 30 to 32°C (86–90°F) as standard (!); some low-cost providers use closer to 15 cm (6 inches) spacing and 35°C (95°F)
- Porch roof
- Roof overhangs
- Roof structure: no truss roof! Use engineered timber roof structure (KVH)!
- Clay roof tiles!
- Frost protection skirts!
- Blinding layer (clean fill layer)!
- Do you have to paint any roof boxes/rafters yourself?
- Interior walls definitely not made of aerated concrete!
- I don’t really need to mention underfloor heating, right?
- Concrete slab 25 cm (10 inches)
If you compare all these points and, for example, the quality provider is missing one or two things while the low-cost provider misses most of them, then it’s clear where the price difference comes from.
Sascha_aus_H28 Apr 2017 23:55Grym schrieb:
- Never use aerated concrete for interior walls! Why?
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