REALWorld Law

Construction

Variations

How are variations to the specification for engineering or construction works normally dealt with?

Italy

Italy

Contractual mechanisms for dealing with variations to the works vary depending on the variation.

Agreed variations

The contractor cannot vary the agreed technical specifications unless authorized by the client in writing. The client can request the removal of unauthorized variations. Even if the variations have been expressly authorized, if the price of the entire work is determined as a lump sum amount, the contractor cannot receive any consideration for the variations or additions, unless agreed otherwise.

Necessary variations

Variations to the technical specifications can be made and the relevant costs determined by a judge if both:

  • the variations are necessary to complete the work according to the best practice and the law; and
  • the parties do not reach an agreement.

In practice, these variations are only made due to changes in the law during the construction.

If the cost of the necessary variations exceeds one sixth of the agreed total price, the contractor can withdraw from the contract and receive, depending on the circumstances, a reasonable indemnity. The client can also terminate the contract if the variations are material. However, the parties often agree that the costs of the necessary variations are divided between the parties and that the contractor waives its right to terminate the contract if variation exceeds the above limit.

Variations ordered by the client

Variations ordered by the client cannot:

  • exceed one sixth of the contract price; or
  • entail material changes to the nature of the works or in the quantity of each portion of the works.

The parties of a private construction contract usually agree to depart from the above limitations.

Even if agreed as a lump sum, the contractor can request compensation for the extra costs arising from variations requested by the client.