Single-family house with a separate apartment currently for 2 adults, children planned

A wise man once told me: For the cost of a guest room that is occupied 10-20 times a year, you can pay for a hotel room for the guests for a lifetime. It never adds up!

That's true.

The same applies to a granny flat.

That is only true to some extent. Especially where the municipality has not enacted a defense statute against AirBnB & Co and/or worker accommodations, student apartments, etc. are in demand, it can look very different. Only in the normal case is the housing-related secondary income at the lot size "1 rental unit" nonsense, from which only others benefit (financial advisors, contractors).

: Tell me your postal code area, then I'll see who hangs around there.

Postal code area 51, so the Cologne outskirts. Regional is definitely preferable to a glossy mass product with a well-known name!

Would you like to liven up your own thread a bit? You don’t answer banal but fundamental questions...

Where exactly does the low budget come from? What use is it to you if your bank advisor sets your monthly burden for you? You should specify that! Some have calculated here that your planning will not just be tight but will exceed the budget by miles... does money not matter? Then why specify 300k and not just write "doesn’t matter"?

Sorry, I was working the last few days and mostly only online with my phone.

So the plot is already purchased, so it no longer factors into the calculation. The bank advisor would approve 550k, but I am actually more "conservative" there and would therefore like to keep the budget lower. That’s where the set 300k come from, but they are not fixed.

We are roughly planning with 150-180 sqm, with possible expansion reserves (so the full sqm number doesn’t have to be habitable from the start but can also be fully reached later in the form of an expanded attic).

There is a university in the neighboring town and we are in the catchment area of Cologne, so the target group for the granny flat would actually have been students/trainee teachers or commuters.

Next week we have an appointment with the architect, after that I’ll certainly be smarter.

ZIP code area 51, so the Cologne surrounding area. [...] There is a university in the neighboring city and we are in the catchment area of Cologne,

Deutzer side accordingly, and from the university I conclude SU, not GL or GM.

Regional is definitely preferable to us than glossy mass products with a well-known name!

That sounds good.

Next week we have an appointment with the architect,

A freelance architect (?)

Deutzer Seite accordingly, and from the university I conclude SU, not GL or GM.

No, actually GM

A freelance architect (?)

Yes, it is about fundamental consulting. Basically "needs assessment" and then seeing what makes sense for us. So prefabricated house or solid construction, which type of construction, basement yes/no, etc.

There is currently a serious problem with the PM function here, but I also don't want to spread everything publicly about the construction companies in the region. If you like, you can also contact me by e-mail - at gmx (de) I am also called 11ant.

There is currently a big problem with the private message function here, but I don't want to spread everything publicly about the construction companies in the region either. If you like, you can also contact me by email - at gmx (de) I am also called 11ant.

I will send you an email. Thank you!