ᐅ Build a Semi-Detached House on Your Own?

Created on: 1 Jan 2022 14:14
L
lalala-lalala
Hello,

In 2021, I was able to reserve a building plot in a new development area for a semi-detached house. The release of the development area is planned for autumn 2022. The goal is to move in by autumn 2023.

So far, no neighbor has been found for the adjacent plot.

I can’t wait much longer because I need to award the contract for the basement excavation. Of course, I would like to plan together with a neighbor.

The notarization appointment for the semi-detached house plot is scheduled for January.

I plan to wait for a neighbor as long as possible. Otherwise, due to the fixed move-in date of autumn 2023, I will have to start building my semi-detached house alone, without a neighbor.

Please share your experience and opinions with me.

Would you withdraw? I might still be able to switch at short notice to a still-available, less attractive plot for a detached house.

The plot for the semi-detached house is nice, and I would prefer it over the plot for the detached house.

I have never seen a single semi-detached house standing alone. Also, regarding a situation where the neighbor does not want a basement and would then have to follow my building style, I think this is not an ideal start to a new neighborhood... I also think that when the neighbor builds their half, there might be damage to my house wall.

What speaks against starting the build alone, with the risk that a neighbor might only be found months or one or two years later? The semi-detached house shouldn’t collapse in the meantime, right?

Best regards!
11ant3 Jan 2022 16:46
Tassimat schrieb:

If the houses are properly decoupled, then you hear absolutely nothing. Two separate exterior walls with an air gap between them provide complete sound insulation.
Yes, the air gap is crucial. Whether it's mortar lumps or insulation boards—any connection between the two buildings will transmit sound. Referring to my suggestion regarding the exterior insulation and finish system (EIFS) on this side of the house, this means staying at least 4 cm (1.5 inches) away from the property line with the finished wall surface (plaster)—2 cm (0.8 inches) as an intentional gap plus 2 cm (0.8 inches) to account for measurement discrepancies on the neighbor’s side.
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kati13373 Jan 2022 16:57
Tassimat schrieb:

But semi-detached houses have no windows between them. Maybe two detached houses with a 6m (20 feet) gap and open windows are worse than two solid walls without windows.
It’s enough if the “noise neighbor” has their window open and the noise hits your own closed window.

That is certainly possible, but I cannot judge. It probably depends a lot on the building conditions. For me, that would have been too risky in any case. Many years ago, I lived in a multi-unit building where an identical building was adjacent, similar to a semi-detached house but stretched over several floors, and the bathrooms next to each other were very noisy.
You never really have full protection against this, as seen in our situation, and there have been others here in the forum as well.
I have also heard from several friends living in semi-detached houses that they are very satisfied and don’t notice anything from next door. Some even have nice neighbors they can enjoy chatting with. I think you just can’t generalize.
lastdrop3 Jan 2022 21:03
I live in a semi-detached house and consider myself lucky to hear absolutely nothing from the neighbor.

We have young children, a piano, drums, heavy metal music, and no complaints from the neighbor.

During construction, it is crucial to be extremely precise. Even a small dab of mortar can ruin everything…
H
Hutchinson123
3 Jan 2022 21:14
Hey, here!

We can hear impact noise in our terraced house. Stomping, heavy objects dropping, moving furniture (Why do people do this several times a day?). It’s still within reasonable limits and noticeably reduced compared to an apartment building, but it’s still not great.

It’s a pity because we didn’t expect this. However, airborne noise doesn’t pass through here at all.

Whether it was the classic mortar lump, construction debris, or something else, we’ll probably never find out. But we’re not too upset about it since a detached house wasn’t an option, and this can also happen with a semi-detached house.

I might add some insulation and drywall in the living room, but I’m not sure if that will make a difference.
T
TmMike_2
3 Jan 2022 21:19
If I were to build a semi-detached house, I would just build the entire house at once. That way, I could rent out the other unit and choose my neighbor.

In our area, plots for semi-detached houses are exactly 50% the size of those for detached single-family homes. For example, instead of 900m² (9700 sq ft), they are 450m² (4800 sq ft). This also makes it possible to stay in the city instead of having to move to a suburb 15km (9 miles) away.
A
apokolok
3 Jan 2022 21:27
TmMike_2 schrieb:

If I were to build a semi-detached house, I would just build the entire house. At least then I could rent out the other unit and choose my neighbor.
In our area, plots for semi-detached houses are exactly half the size of those for detached single-family homes.
Instead of 900 m² (about 9700 sq ft), it’s 450 m² (about 4800 sq ft). That way, you can still stay in the city and don’t have to move to a suburb 15 km (9 miles) away.

That’s classic rural thinking again (no offense).
In truly sought-after or expensive areas, 450 m² (about 4800 sq ft) easily accommodates at least TWO semi-detached houses.
On a 900 m² (about 9700 sq ft) plot, depending on the layout, you’ll find a small apartment building with 6–8 units or 7–8 townhouses.
So you can definitely stay in the city 😉 though a good part of Germany wouldn’t find that very funny.