Work out your prefab house build costs for 2026
When building a house, the bare house price is rarely the actual final sum. This calculator works out the realistic total cost of your prefab house — clearly and as of 2026.
Your inputs
In the quick estimate the price per square metre is derived from the chosen finish level.
Grunderwerbsteuer (real-estate transfer tax) in Nordrhein-Westfalen: 6.5%Grunderwerbsteuer (real-estate transfer tax) rate in Nordrhein-Westfalen: 6.5%. Source: federal-state legislation, as of 2026. Only due when buying a plot.
All figures are typical market averages for 2026 and provide an initial orientation for building a house. They are no substitute for a personal offer.
Expected total cost Estimate
realistic range €485,825 – €620,776Estimate: range −10% / +15% around the calculated value. The real price depends on the plot, subsoil, fittings, provider and own labour. As of 2026.
The biggest cost drivers
- 1. House price€392,000
- 2. Ancillary building costs (around 15%)€65,100
- 3. Foundation (slab or cellar)€42,000
Not included
- • Purchase-related costs (only relevant when buying a plot)
- • Kitchen and individual extra fittings
- • Site servicing (Erschließung) for a still unserviced plot
- • Financing and commitment interest
* All figures are estimates based on typical market averages (as of 2026). They are no substitute for a personal offer. Each item shows an assumption/source as a tooltip in the input fields.
Financing stress test
Will your financing hold up if interest rates or build costs rise? Check your monthly instalment under conservative scenarios.
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Fertiger Zitat-Satz
In 2026 a turnkey prefab house costs, on average across the market, around €2,800 per square metre (excl. plot and ancillary costs). (Quelle: www.prefabricatedhouse.de, Stand 2026)
HTML-Einbettung (mit Quellenlink)
<p>In 2026 a turnkey prefab house costs, on average across the market, around €2,800 per square metre (excl. plot and ancillary costs). <a href="https://www.prefabricatedhouse.de/costs/cost-calculator" rel="nofollow">Quelle: www.prefabricatedhouse.de</a></p>Turn your calculation into a concrete offer
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Where the figures come from and what role funding plays
We derive the price bases stored for 2026 from the current market offers of the140 editorially reviewed manufacturers and keep them updated using the construction price index (Baupreisindex) published by the Federal Statistical Office. Before you sign a contract, you should always compare every calculation with the current terms of the KfW funding for new builds (programmes 297/298) — because a KFN-eligible house (Klimafreundlicher Neubau / climate-friendly new build) can cut your equity requirement by up to €30,000. The consumer advice centre (Verbraucherzentrale) has compiled the cost traps when building that often loom — factor these into any solid budget plan.
If you'd like to put the calculated amounts into context, our overview of the house price per square metre gives you the matching current market values.
Calculator, cost tool and ancillary costs for a prefab house — common searches
Estimating the build cost of a prefab house
A cost calculator for a prefab house gives a first price orientation for your budget. The more precise your figures for living area, cellar, finish level, plot and fittings, the more reliable the estimate.
Keeping price factors in view early
With a prefab-house calculator, homebuilders keep the individual price factors in view from the start. What matters most is house size, finish level, slab, cellar, plot and ancillary construction costs.
Running scenarios with the calculator
A prefab-house calculator makes price planning easier because you can compare different scenarios for living area, fittings, cellar and energy standard side by side in real time.
Calculating every item together
If you want to work out the cost of a prefab house, look at the house price, plot, ancillary construction costs, cellar or slab, fittings and outdoor works all together.
Capturing ancillary construction costs correctly
An ancillary-cost calculator for a prefab house should factor in earthworks, utility connections, permits, surveying, notary, Grunderwerbsteuer (real-estate transfer tax), financing costs and outdoor works.
Estimating costs when building it yourself
A cost calculator for self-builders should realistically reflect build costs, own labour, materials, ancillary costs and risks. With a prefab house, the finish level shapes the price above all.
A first price orientation for building a house
A cost calculator for building a house gives a first price orientation. With a prefab house, the plot, ancillary construction costs, cellar, slab and fittings come on top of the house price.
Key questions about the cost calculator
Answers to the most important questions about costing a house build in 2026 — from prices per square metre through ancillary construction costs to easily overlooked items.
