AI-generated
Share instead of shrink.
Building alone in Germany has become very expensive. Together with family, friends or another family, your own home is within reach again.
Living together is nothing new.
In many cultures it is completely normal: parents, cousins and friends under one roof, people who look out for each other. If you moved to Germany, you know how much that is worth, and how quiet life can get far away from your family.
Better prices
You share the plot, the groundwork and much of the extra building costs. Each family pays far less than it would alone.
Better chances
Two families can reach things one family cannot, for example a plot near the city that would be out of reach for one.
Not alone
You have people around you, help with the children and someone who understands your situation. And still your own front door.
In the city, the land costs more than the house.
If you want to live near the city, the house is rarely the problem. The land is. Alone, that hardly works any more. If you share the plot, you get further.
was the average price of one square metre of building land in Munich in 2025
would be the cost of a small 300 m² plot, without any house
per family if two share the plot, and even less with three families
Example calculation by Hausbau mit Alex. Munich: 2025 average according to the Bavarian State Office for Statistics, reported by Börse Express. Prices vary a lot by location.
Same home, a very different bill.
Our example: the same 80 m² home, once alone and once as part of a two-family house.
Single-family house, 80 m²
Our Solis 80 bungalow, fully calculated
about 8,280 € per m², all paid by one family
Two-family house, 80 m² each
per family, the same 80 m², even with a lift
about 6,010 € per m², so 181,958 € less than alone
| Example calculation (incl. VAT) | Alone: Solis 80 | Shared: upper home |
|---|---|---|
| House, ready to move in | 233,683 € | 210,000 € |
| Transport, fittings | 10,800 € | 7,800 € |
| Planning and foundation | 36,855 € | 18,780 € |
| Additional building costs | 55,200 € | 29,600 € |
| Garage, terrace, solar; shared version also outside stairs and lift | 59,000 € | 76,000 € |
| Plot (570 m² × 360 €/m²) | 205,200 € | 102,600 € |
| Notary and property transfer tax | 12,000 € | 6,000 € |
| Kitchen | 10,000 € | 10,000 € |
| Outdoor areas | 40,000 € | 20,000 € |
| Total per family | 662,738 € | 480,780 € |
Example calculation by Hausbau mit Alex, prices as of 10/2026, non-binding. Your plot, region and wishes will change the numbers. It applies to the upper home; the plot, floor slab, groundwork and additional building costs are shared.
From bungalow to two-family house.
Our Solis 80 bungalow, twice, one on top of the other. Same floor plan, 80 m² per family, 160 m² in total. A home of your own, upstairs and downstairs.
- Own entrance for the upper home via the outside staircase
- Outside lift as an option, for example for parents
- Large roof terrace for the upper home
- Each family with its own garage and meters
AI-generatedTwo homes. Two lives.
In essence only the roof, the plot and the main connection are shared. Everything else is separate.
Own entrance
The upper home has its access from outside. Nobody walks past anybody else's door.
No shared stairwell
Nothing to clean, nothing to maintain, no space wasted. An inside staircase is available on request.
Quiet and privacy
The two families will not hear each other. With us that is planned, not luck: sound-insulating floor, separate garden areas, privacy screens.
Lift possible
The outside lift makes the upper home step-free too. That works well when several generations live together.
Share only what you must
Roof, plot, main connection. That is manageable and easy to set out clearly in a contract.
Or: house with a granny flat
Just as good: one larger and one smaller home. It suits parents and an adult child, a smaller second family, or renting out.
AI-generatedOften easier than you think.
In planning law a two-family house counts as a single detached building, and in almost all federal states it is in the same building class as a single-family house. It fits many development plans that allow “at most two homes per building”.
What always belongs to it: check the development plan (number of homes, full storeys), clarify parking, ask the municipality. That is normal and no obstacle.
Check first, then plan. We do it with you. Send your development plan to anfrage@hausbau-mit-alex.de and we will take a look.
We bring families together.
No partner family yet? Register. We look in your region and approach municipalities and mayors together: homes for two or more families on one plot.
Register
Your region, the kind of home you want and a few questions about your daily life.
Find a matching family
We look at who in your region suits you and ask each of you individually.
Go to the municipality together
Where several families are looking, we talk to municipalities and mayors.
Register now.
It takes about three minutes. Free and non-binding.
Almost there
We have sent you an email. Please confirm your registration there, only then are you registered. Check your spam folder too.
What you want to know.
Can we build a two-family house on our plot?
Is it easier to get approved than a semi-detached house?
Do we need a shared staircase?
Will we hear the other family?
How many parking spaces do we need?
What is the difference between a two-family house and a house with a granny flat?
How is the house divided between two families?
Is KfW funding available per home?
What if we fall out?
What does the matching cost?
Can we also build with relatives or friends?
Why I do this.
I am Alex, managing director of Hausbau mit Alex. I advise families on building prefab houses, and every week I see how many fail because of the land and the extra costs. Building together is the way to a home of their own for many. It takes the right family and an honest plan.