Construction costs - Please provide an assessment

Hello,

About the house:

[*]It is supposed to be a Kfw 70 house without a basement.
[*]The house itself will only have one transverse wing and otherwise all bay windows and balconies will be omitted.
[*]The living area according to the plan is about 165 m².
[*]Triple glazing on the windows (including external roller shutter boxes)
[*]A central ventilation system is planned.
[*]A room air-independent fireplace is included in the offer.
[*]Heating will be with an air heat pump + 300 l domestic hot water storage tank.
[*]According to the offer, the masonry is 24 cm Poroton + 10 cm insulation.
[*]Everything is included in the offer except the painting and the floor coverings.
[*]Tiles are included with a material value of €25 per m² for the kitchen, pantry, and bathroom.
[*]Typical things like roofing sheet metal work etc. are also included.

Yes, the floor slab is also included; it is a floating floor slab with perimeter insulation.

You probably mean a self-supporting floor slab?

The price does not include additional costs such as connection fees for sewer, water, wastewater, and electricity. The price quoted to us amounts to €225,000. Now, of course, we are wondering whether the price is realistic, since we have already heard both sides.

You want to build a 3-gable house with around 165 sqm living area; if I base it on your offer price, I come to €1,364.00/sqm living area. That is not realistic for a KfW 70 efficiency house and certainly not with the mentioned technology.

But if you fall into the most common mistake of all builders – confusing floor area (GF) with living area – the price fits again.

My question therefore: do the 165 sqm actually correspond to the living area or rather to the floor area?

Best regards

This concerns the living area of 165 m² according to the plan.

Thank you very much in advance for the numerous responses.

The company is a "large" medium-sized business that has existed for over 20 years and is largely a family-run operation. Just a brief piece of information about the company.

Hello,

This concerns the living area of 165 m² according to the plan.

Then the offer price is out of the question - a realistic price for the new building including technology should be in the range of TEUR 250 - 260; plus additional construction costs of TEUR 35-40, costs for painting and flooring, landscaping, garage as well as reserves for extras. The "decisive factor" is the BB; the reasons for the unusual initial price should be found here and you should have it - along with the other contract documents - carefully reviewed before you sign even a single paper! This of course also applies to any provider you decide on.

The company is a "large" medium-sized business that has existed for over 20 years and is mostly a family-run business. Just a brief information about the company.

With a red or green logo, or put another way: Sauerland or Lower Saxony?

Best regards

I have checked again, the area of the ground floor and attic is 171 sqm. The knee wall height is 100 cm.

No, it is neither Sauerland nor Lower Saxony, but the Upper Palatinate.

Thank you very much for the tip, but before I take such a step, I would have everything checked thoroughly.

For example, if we were to choose a different brick, e.g. thicker and without insulation, the price would be 15,000 euros higher. According to the statement, the bricks are more expensive and the single-family house increases in size externally. Is this statement correct?

Otherwise, the construction description sounds good, including roofing work etc.

Hello,

If we were to choose a different stone, for example a thicker one without insulation, the price would be 15,000 euros higher right away. According to the statement, the stones are more expensive and the detached house becomes larger on the outside. Is this statement correct?

The price seems very high to me, even if you are talking about a 42.5 cm stone; in my opinion, this seems like a first indication to bring the offer price into commercially realistic ranges ;)

I assume that you have utilized the building envelope – at least in width. If this is the case, the floor/living area will rather shrink when using a larger stone for the exterior walls, since you must not exceed the building envelope; dormers and comparable extensions can be exempt from this rule. If you have "room" within the building envelope, the statement that the external dimensions of the building increase applies.

Otherwise, the construction description sounds good, including roofing work, etc.

Do you also understand what you might be buying – regardless of the mention in the construction description?

Kind regards

And as always applies: What is not explicitly mentioned in the [BB] is not included. Think carefully about what belongs to building a house and check if anything about it is stated in the [BB].