Costs beyond the investment
Title deed transfer tax, VAT where it is due, the SPK appraisal, the conversion spread and the per-person fees, by family size. Every line computed from the published cost data with the condition attached.
Each of these reads the published dataset at build time rather than carrying its own copy of the figures. That is the whole design principle: a calculator that holds its own numbers will eventually disagree with the page that explains them, and the reader has no way to tell which one is stale.
Data as of 11 November 2026. No sign-up, no tracking, and nothing recorded about what you enter: these run entirely in your browser.
Title deed transfer tax, VAT where it is due, the SPK appraisal, the conversion spread and the per-person fees, by family size. Every line computed from the published cost data with the condition attached.
Listed because the data behind them is already published, so anyone can build these before we do.
The data is CC BY 4.0 and the calculations are not secret. If you want to build one of these into your own site, take the files and do it. An attribution is all that is asked, and a link back is not a condition.
If something computes wrongly, tell the editor: a calculation error here is a data error or a code error, and both get fixed in public.