Winket consultancy

housing economics, estimating and specifications

Winket, construction costs made clear
When giving an estimate for a building project or a renovation project, our aim is to clarify to the commissioner and to the architect what the economic consequences of their plans are in all stages; from their initial budgets tot the final contract.


Winket, advice on housing economics
In the end it is all about ‘housing economics’, not just about the lowest possible construction costs. Therefore we are pleased to use our expertise on operation and maintenance in your building project. Alternatively, we can also ‘just’ give estimates or assist in negotiations.

Over 30 years of Experience!
In 1986 Tim de Jonge started his consultancy ‘Winket voor de bouw’. The bureau takes on advice assignments from all over the Netherlands.

Winket, research and publications
We do analyses on the construction costs of fully finished projects. The results of these analyses are used in several ways in our construction costs documents. Some of these projects are suitable as a ‘reference project’ in our ‘Winket reference projects based model’.

Our project analyses are published in the journal ‘Bouwmarkt‘ (BIM Media) and other journals.

Bouwprojecteconomie & EcoQuaestor
Bouwprojecteconomie is a cooperation of eleven independent Dutch building-costs consultancies, Winket among them. The consultancies have brought together their data and calculation methods with respect to building and environmental costs in EcoQuaestor, a joint model and database.

They share their (market) knowledge and experiences in current construction projects among each other. In this way Bouwprojecteconomie augments the knowledge of Winket.