Construction costs are currently skyrocketing

Gas new customer 11 cents, electricity about 33 cents. So factor 1 to 3. Any heat pump can achieve that even in new buildings. Thus, running costs are identical. Purchase price of heat pump about 15k more. Lifespan several years shorter. Financially, the heat pump will hardly pay off. Especially because most still add a wood stove for comfort reasons. But nevertheless, the best heating technology for new buildings.

In 2015/2016, the heat pump cost almost 10k extra for us. We only chose it because no gas connection was laid in our cul-de-sac and we would have had to pay 10k for the house connection as well, so the gas heating would have come to about the same price. All our neighbors decided on the heat pump for this reason back then. I'm curious when the first ones will run into trouble. We are the only ones with a pure outdoor unit; the others all have split pumps. Let's see if the lifespan differs.

The hallway on the ground floor and basement is currently planned in light gray and the adjacent guest WC is graphite gray. We originally decided that the narrow hallways would then appear larger, but it probably looks strange if the guest WC is open, right?

It’s the same for us. Fits perfectly. Our guest WC is usually also left slightly open. We also have a lot in light gray with large tiles (90x90) and anthracite in the bathrooms. The walls in white. ;)

Hello,
so much for the topic of tiles in light gray in the hallway and anthracite in the guest bathroom, but only in the size 60x30.
I think it matches well, but like many things in life, it is also a matter of personal taste.

Yes, it's a matter of taste, for example I don't like it now, but you do, so it fits.

We received the cost estimate from our architect yesterday. For a 180m2 living space. Bungalow (in which 60m2 should initially remain only as a shell) without KNX, electric shutters or other "gadgets", the price is estimated at €688,000 (including incidental construction costs, which amount to €162,000). We already find that quite steep.

Thank you for your responses on the topic of tile colors. We are sticking with light gray and anthracite. The pictures were also helpful, many thanks! :)