Prefabricated-house cost calculator 2026

The house price is not the final price. Use our calculator to estimate the realistic total cost of your project, transparently and with current 2026 figures.

Your details

Living area: 140 m²

80 m²250 m²

Completion level

TurnkeyReady to move in, highest price

Shell houseComplete the interior yourself

Foundation

Floor slabBasement

These figures are typical industry averages for 2026. They provide an initial guide and do not replace an individual quote.

Estimated total cost*

€539,805

House price only€392,000

Foundation/basement€42,000

Ancillary costs (15%)€65,100

External works & contingency€40,705

Turn this estimate into a concrete figure. Get real quotes tailored to your budget.

Compare quotes

Data basis and funding information

The 2026 prices used by the calculator are based on current market quotes from 35 editorially reviewed providers and are updated using the construction price index . Before signing a contract, compare every calculation with the current terms of KfW funding for new builds (programmes 297/298), as a KFN-compliant home can reduce the equity requirement by up to €30,000. The consumer advice centre summarises typical cost traps when building that every serious budget should take into account.

Current market figures are available in our overview of prefabricated-house prices per square metre.

Prefabricated-house cost calculator

A prefabricated-house cost calculator provides an initial budget guide. The more precise the living area, basement, completion level, plot and specification details, the more realistic the estimate.

Prefabricated-house calculator

A calculator helps buyers identify the relevant cost factors early, including house size, completion level, floor slab, basement, plot and ancillary construction costs.

Prefabricated-house estimator

An estimator supports planning by comparing scenarios for living area, specification, basement and energy standard.

Calculate prefabricated-house costs

A realistic calculation should include the house, plot, ancillary costs, basement or floor slab, specification and external works.

Ancillary construction cost calculator

Ancillary costs can include groundworks, utility connections, permits, surveying, notary fees, property transfer tax, financing and external works.

Self-build house cost calculator

A self-build calculator should realistically account for construction, DIY labour, materials, ancillary costs and risks. The completion level is particularly important for a prefabricated house.

House-building cost calculator

A house-building calculator provides an initial budget guide. For prefabricated homes, the plot, ancillary costs, basement, floor slab and specification must be considered alongside the house price.

Frequently asked questions about the cost calculator

Answers about calculating a prefabricated house in 2026, including square-metre prices, ancillary costs and hidden items.

How does the prefabricated-house cost calculator calculate the total?

The calculator adds four cost blocks: house price (living area × price per square metre for the selected completion level), foundation (slab or basement), 15% ancillary construction costs on the house and foundation, and a flat €15,000 for external works. A 5% contingency is then added for unforeseen expenses. This produces a realistic total investment rather than an artificially low house price.

Are land costs included in the calculator?

No. Land costs are deliberately excluded because they vary enormously by region in 2026. The calculator shows construction costs including ancillary costs; the price of the plot must be added separately.

How accurate are the square-metre prices?

The stored prices (€1,200 kit house, €1,900 shell house and €2,800 turnkey) are 2026 market averages based on a detailed comparison of 35 providers. Premium manufacturers may be up to 30% higher and budget providers up to 15% lower. The result is a robust guide, but a binding provider quote may differ.

Which cost items can the calculator underestimate?

Frequently underestimated items include bespoke bathrooms and kitchens, difficult sloping sites, external works above €15,000, utility connections on undeveloped estates and later design changes. Allow an additional reserve of 5% to 10% for these items.