The Trevi Trust Monitor was launched on 01/01/2022, it replaces the TREVI index launched in January 2005. It is a prospective analysis of the real estate market: How will the Belgian real estate market evolve? It complements the Statbel and notaries' reports, which look at the past and take stock of the property market.

The Trevi Trust Monitor (TTM) is a confidence barometer based on the state and evolution of the Belgian real estate market based on data from our Trevi Partner agency network.

More specifically, the TTM is calculated on four components, namely 

  1. The evolution of the demand from occupying buyers and investors;
  2. The demand for the different types of property
  3. An estimate of the evolution of prices for houses (with garden), flats and building plots;
  4. An estimate of the evolution of the volume of transactions by type of property


Trevi Index, Sources & Methods

1. Observing the residential property market

It is not easy to construct databases that record the price of transactions on the Belgian residential property stock. In the multiplicity of available sources, there are few that simultaneously :

  • Based on a sufficiently representative sample
  • Provide efficient systems for collecting information
  • Provide exhaustive information on the characteristics of traded properties
  • And provide data that allow an understanding of the recent reality of the markets

2. The sources available for drawing up a barometer

In order to identify the available statistical sources that allow us to understand the residential property market, it is interesting to break down the history of the transfer of a dwelling into four phases: the placing of the dwelling on the market, the signing of the sales agreement, the signing of the notarial deed and finally the registration of the transfer in the registers of the land registry (graph 1).


Processus de mise en vente d’un bien

3. The Trevi Trust Monitor

TREVI's original system for collecting information on property prices and characteristics provides an insight into the first two stages of the sale process and the outlook for the Belgian property market over the following quarters.

The studies carried out on the basis of the notarial deeds are placed at the third stage of the transfer process: at the moment of signing the notarial deed. Three to four months have already passed for a property that has been put up for sale followed by an actual transaction, so that much of the information has lost its freshness.
Almost a year after a property has entered the sale process, the registration of the transfer in the administration's registers completes the transfer process.
In the multiplicity of available sources, the TREVI TRUST Monitor is based on data allowing the analysis of recent developments in the Belgian real estate market, the index presented in quarter t being relative to the market observed during quarter t-1 on a large sample and projecting over the next quarters.