A technical and administrative deliverable
The capitolato takes the form of a technical and administrative deliverable supplementing and completing the main contract. It governs the legal and operational relationship between client and contractor, defining the construction detail and the economic consideration for the work envisaged.
In public works its preparation is a mandatory requirement and the document is attached to the draft contract as a deliverable of the progetto esecutivo. In private construction its adoption is left to the free will of the parties.
The two part structure
Article 32 of Annex I.7 to the public contracts code requires the capitolato speciale d'appalto to be divided into two parts: one containing the description of the works, the other the specification of technical requirements. The division is not formal, since the two parts follow different regimes.
Professional practice translates this division into an administrative part and a technical part, often bound as separate documents. The administrative part gathers the elements needed for the economic and technical qualification of the contract, while the technical part sets out operational provisions and the requirements for materials and workmanship.
| Part | Typical contents |
|---|---|
| Administrative | Subject and value of the contract, form of consideration whether lump sum or measured, time for completion, liquidated damages, valuation and payment rules, treatment of variations and new rates, reservations, securities, subcontracting, safety obligations |
| Technical | Requirements and provenance of materials, execution methods by work category, acceptance criteria, testing and inspection, tolerances, site requirements |
For complex works the same article additionally requires the capitolato to include a site inspection plan, setting out the programme of checks to be carried out at the various stages in order to secure proper execution of the works and their parts. Where necessary the plan also covers geodetic, topographic and photogrammetric checks needed to assess the qualitative and quantitative performance achieved.
The typical arrangement of the document
Professional practice has settled on a sequence of chapters which, though the naming varies, recurs consistently and is worth knowing so as not to omit essential provisions. Knowing it allows one to navigate a document received from others.
| Section | Subject |
|---|---|
| Nature and subject of the contract | Description of the works, deliverables forming part of it, form of consideration |
| Contract value | Works amount, separation of the discountable component from safety costs, contract sum |
| Provisions on execution | Possession, time periods, suspensions, extensions, liquidated damages, acceleration bonus where provided |
| Economic provisions | Advance payment where provided, interim payments, retentions, final account, balance |
| Valuation | Rules for measured and lump sum work, valuation of supplies |
| Variations and new rates | Permitted cases, procedure, applicable rates, determination of unforeseen rates |
| Reservations and disputes | Manner and time limits for entry, resolution procedures |
| Securities and insurance | Bonds, policies, cover required of the contractor |
| Safety and employment compliance | Safety obligations, personnel, social security compliance |
| Subcontracting | Permitted scope, conditions, notification obligations |
| General technical requirements | Quality and provenance of materials, testing, tolerances |
| Technical requirements by category | Execution methods and acceptance criteria, category by category |
| Completion and handover | Final verification, taking over, latent defect obligations |
The first eleven sections belong to the administrative part, the last two to the technical part, which in practice occupies most of the document and constitutes its specific added value over a standard contract. The technical part occupies most of the document in practice.
The order is not immaterial for use on site. A capitolato in which the valuation provisions precede those on variations reads in the same sequence in which problems arise, and shortens the time needed to locate the applicable clause in a discussion.
The reference to the general conditions
The technical part does not operate in isolation. As regards the acceptance, quality and use of materials, their supply, their place of origin and any substitution, capitolati speciali normally incorporate the corresponding provisions of the capitolato generale d'appalto, the general conditions of contract.
This incorporation by reference is one reason why reading the capitolato speciale alone can prove incomplete: some provisions are not reproduced but referred to, and in a dispute the applicable text is the one referred to. Some provisions are not reproduced but referred to.
The relationship with the bill of quantities
The link between specification and bill runs both ways, and its robustness is where disputes concentrate during construction. Its robustness is where disputes concentrate.
Every measured item must find in the technical part the description of the work that justifies it. Without that description there is no acceptance criterion, and site verification becomes discretionary.
Every onerous technical requirement must find in the bill an item that values it. Without that item the bidder either sees it and prices it into the discount, or does not see it and claims it during construction: either way the design has transferred a risk without disclosing it.
A third level of consistency concerns units of measurement. Where the specification describes an operation on a basis different from that adopted in the bill, valuation becomes an exercise in interpretation and the registro di contabilità loses its function as an objective reference.
The capitolato informativo
Legislative Decree 209 of 2024, the corrective decree to the code, introduced article 32-ter of Annex I.7, devoted to the capitolato informativo, the employer's information requirements document. It defines the general and specific information requirements needed for digital management of the project.
Its significance grows as the use of digital information management methods and tools extends. Where the bill of quantities is derived from a model, the capitolato informativo is the document establishing the level of detail and reliability at which quantities must be extractable, and therefore a deliverable bearing directly on the quality of the estimate.
The most frequent errors
A specification adapted from a previous project without full revision is the first and most widespread. It carries over irrelevant requirements, references to work that is absent and valuation rules inconsistent with the form of consideration chosen for the new contract.
A technical part organised by product category rather than by work category is the second. It makes correspondence with the bill difficult, since the bill follows the sequence of construction, and multiplies the opportunities for misalignment.
Describing work that is not measured is the third, and transfers an unpriced obligation to the contractor. An unpriced obligation is thereby transferred to the contractor.
A general reference to technical standards without identifying the applicable part is the fourth. At verification stage it does not allow the requirement actually imposed to be established, and on site it opens the door to argument about what is due.
In private construction
In private work the capitolato is not mandatory and is often omitted in practice, with the result that technical requirements are left to the bill items and the drawings. That works until a dispute arises over the quality of a material or a method of execution.
Even a basic specification, defining for the main categories the requirements for materials, the acceptance criteria and the valuation rules, changes the nature of the discussion: it shifts the argument from what the parties recall agreeing to what the document prescribes. On refurbishment projects with a high level of finish it is probably the deliverable with the best ratio between drafting time and risk avoided.
Note: the legislative references in this page relate to Italy and are current as at the date of publication. Public procurement rules change frequently, and the version in force should be checked before any operational use.