Quick answer
One half of a semi-detached prefabricated house costs around €290,000 (100 m²) to €580,000 (150 m², turnkey with KfW 40) in 2026, excluding the plot. The shared party wall and plot make it 10 to 15 percent cheaper per square metre than a comparable detached house, making it an economical option in expensive urban locations. Typical living areas are 100 to 130 m² per half. Both halves are generally planned and built together, and the party wall must meet DIN 4109 acoustic requirements.
Semi-detached house: an overview
The Semi-detached house is one of Germany's most popular house types. Prefabrication brings out its strengths: a precisely predictable schedule, clearly defined costs and a high energy standard that readily meets the strict requirements for KfW support in 2026.
Industrial production in weather-protected factories enables wall and floor elements to be made with great precision. On site, the shell is generally erected and weatherproof within one to three days.
Advantages
- Very short, predictable build time
- High energy efficiency as standard in 2026
- Manufacturer's fixed-price guarantee
- Individual planning within a system-built home
Disadvantages
- Lower summer heat-storage capacity
- Internal acoustic insulation needs explicit attention
- Layout changes are difficult during construction
Costs and prices in 2026
The cost of a prefabricated Semi-detached house varies considerably with the selected completion level. From €210,000 is a realistic entry price for a basic turnkey version in 2026.
Always budget for ancillary building costs of around 15 to 20 percent, groundworks and a contingency. Our detailed cost calculator provides a transparent breakdown. See prefabricated-house prices in 2026 for every price factor.
One half of a semi-detached prefabricated house costs between €290,000 and €580,000 turnkey in 2026. The range depends on living area, completion level and provider. Building a pair saves around 15 to 20 percent compared with two separate detached houses. The table shows prices per half:
| Living area per half | Shell-finish | Turnkey | Turnkey + KfW 40 |
|---|---|---|---|
| 100 m² | 210.000 – 260.000 € | 290.000 – 360.000 € | 340.000 – 410.000 € |
| 120 m² | 250.000 – 310.000 € | 340.000 – 430.000 € | 400.000 – 490.000 € |
| 130 m² | 275.000 – 335.000 € | 370.000 – 465.000 € | 435.000 – 530.000 € |
| 150 m² | 315.000 – 390.000 € | 425.000 – 535.000 € | 500.000 – 580.000 € |
Prices are per half and exclude the share of the plot and ancillary building costs of 15 to 20 percent. The greatest saving comes from sharing the plot. Many providers also offer volume discounts when both halves are commissioned together.
