Illustration generated for this guide. It does not represent a property for sale.
Separate desire from available money
The displayed bid draws attention, but your project includes other expenditure. Before participating, build your total budget with documented figures wherever possible. Separate the envisaged price, acquisition fees estimated by a competent source, work, possible financing costs and an appropriate reserve. Your personal ceiling should come from this work. It should not rise simply because someone else offers more.
Request an estimate suited to the sale
The Belgian notarial profession offers a calculator for purchase costs in online public auctions. Use information relevant to the property and have the estimate confirmed by the office concerned. Acquisition costs cannot be reduced to a universal percentage. Also check payment deadlines in the sale conditions. Do not reuse a budget for another purchase, region or personal situation without verification.
Prepare your next step: Buying your first home in Belgium: prepare your budget before viewing
Vary your assumptions about work
Prepare at least one documented working scenario and a less favourable one. If an important element has not been inspected, for example, identify its possible effect on cash flow without inventing a quotation. A reserve does not replace expert assessment; it merely recognises uncertainty. Seek technical advice before deciding where an item could change your ceiling. Fictional simulation figures do not become market prices merely because they appear in a table.
Use ComparImmo to connect figures with documents
The analysis helps identify budget matters requiring investigation. In simulation tools, enter your own assumptions and retain their source. A rental projection based on estimated rent proves neither that a tenant will pay it nor that the home can be occupied immediately. Distinguish a calculated return from cash flow after financing. Compare scenarios on an identical basis and return to the file when a difference arises from missing information.
Write your rule before bidding
State your ceiling and the conditions needed to keep pursuing the project: financing clarified, essential questions resolved and fees understood. Keep this note nearby. ComparImmo does not determine a maximum price suited to your personal circumstances or place bids. If the required amount exceeds your limit, your analysis still helped: it prevented an unsuitable commitment. Walking away can be a prepared decision rather than a failure.
Sources and references
ComparImmo editorial team. Sources checked on 3 October 2026. Check the rules for the region and your circumstances before making a commitment.