Back to the list

Property purchase offer in Belgium: complete guide and advice

05/05/2026
Property purchase offer in Belgium: complete guide and advice
Immobilière B2

Complete guide

The property purchase offer

Everything you need to know before committing in Belgium

3–10 days

validity period

12.5%

registration duties

Protect

suspensive conditions

Property blog · Immobilière B2

Property purchase offer in Belgium: complete guide, advice and pitfalls to avoid

By Gaëtan Lefebvre · Immobilière B2 · Lasne, Brabant Wallon

The purchase offer is a key step in any property project, whether you are a buyer or a seller. It often constitutes the first legal commitment between the two parties. Yet many buyers sign it without fully understanding its implications.

Whether you are looking to buy a house in Lasne, an apartment in Ixelles, a villa in Uccle or a property in Brabant Wallon, here is everything you need to know about the property purchase offer in Belgium.

1. What is a purchase offer?

A purchase offer is a written document by which a buyer proposes to acquire a property at a specified price, subject to certain conditions. Once accepted by the seller, it may constitute a legally binding sale agreement.

Important: Under Belgian law, a purchase offer accepted by the seller may be equivalent to a sale agreement. It is therefore essential not to sign it lightly.

2. The mandatory elements of a purchase offer

◆Identification of the parties — buyer and seller

◆Precise description of the property — address, surface area, cadastral reference

◆Proposed price in figures and in words

◆Validity period — generally 3 to 10 days

◆Any suspensive conditions (mortgage, survey…)

3. Suspensive conditions: your essential protection

Suspensive conditions allow the buyer to withdraw from the sale without penalty if certain conditions are not met. They are strongly recommended.

◆Mortgage approval condition — if the loan is refused, the offer is cancelled at no cost

◆Technical survey of the property — in the event of major structural issues

◆Absence of problematic easements or planning disputes

◆Prior sale of another property — if the buyer needs to sell to finance the purchase

4. The price: how to formulate a fair offer?

The amount of the offer must be carefully considered. An offer that is too low risks being refused or offending the seller. An offer that is too high commits you to excessive costs. The key: knowing the true market value of the property.

In Lasne, Ixelles, Uccle or Woluwe-Saint-Pierre, prices per m² vary significantly. A local agent like Immobilière B2 will help you assess the fair value and formulate a strategic offer.

5. What the seller can do with your offer

◆Accept the offer — the sale is concluded on the stated terms

◆Make a counter-offer — they propose a different price or different conditions

◆Refuse the offer — with no obligation to justify the refusal, even if the offer matches the asking price

6. Registration duties: a cost not to be overlooked

The amount of registration duties varies by region in Belgium. In Wallonia (Brabant Wallon), the standard rate is 12.5%. In the Brussels-Capital Region, the rate is also 12.5% with a possible reduction on the lower bracket.

It is essential to factor these costs into your total acquisition budget before formulating your offer.

Need advice on your purchase offer?

Immobilière B2 guides you at every step to secure your transaction in Lasne, Genval, Rixensart, La Hulpe, Waterloo, Braine-l'Alleud, Ixelles, Uccle and Woluwe-Saint-Pierre.

Discover our other articles