Legalising a Commercial Premises’ Electrical Installation in Barcelona

To legalise a low-voltage electrical installation in commercial premises in Barcelona, you must first establish whether it requires a formal electrical project or can be documented with a technical design report. The answer cannot be based on kilowatts alone: the intended use, public occupancy, specific risks and whether the work is a new installation, extension, alteration or change of use all matter.

The process may then involve a registered electrical installation company, an installation certificate, technical supervision, an initial inspection and a responsible declaration to obtain evidence of registration in Catalonia’s RITSIC industrial safety register. This process is separate from the municipal activity licence or notification, any works permit or notification, and arrangements for the electricity supply.

When an electrical project is required

Spain’s Low Voltage Electrotechnical Regulation, known as the REBT, requires low-voltage installations to be carried out on the basis of either a project or a technical design report. ITC-BT-04 identifies the installations requiring a project. They include public occupancy premises regardless of power, industrial installations above 20 kW and certain car parks, wet locations, fire or explosion risk areas and electric vehicle charging installations. Where more than one classification applies, the more demanding requirement should be followed. [1] [6]

A project must be prepared and signed by a suitably qualified technical professional. When a project is mandatory, execution must also be technically supervised by a competent professional. A technical design report may instead be prepared by an electrical installation company authorised for the relevant category or by a suitably qualified technical professional. In every case, the physical installation must be completed by an authorised low-voltage electrical installation company. [6]

A technical design report is generally used for a new installation, extension or alteration that does not fall within one of the project categories. Classification requires the intended activity, design power, maximum admissible power, circuits and previous alterations to be reviewed. The contracted power shown on an electricity bill is not, by itself, enough to decide which document is required. [1] [6]

• Project: mandatory where the installation falls within ITC-BT-04 project categories.
• Technical design report: applicable when the installation is outside those categories.
• Electrical installation certificate: confirms execution and testing but does not replace a mandatory project.
• Activity project: a separate municipal document, although both files should be coordinated.

Public occupancy and initial inspections

Public occupancy is particularly important because these premises require an electrical project without a minimum power threshold. A small installation is therefore not automatically exempt. Classification should be checked against ITC-BT-28 and the premises’ actual conditions, including its activity, expected occupancy, access by the public, layout and intended use. It is equally unsafe to assume that every shop is a public occupancy premises or to exclude one merely because it is described as an office or studio. [1] [6]

A project does not always trigger an initial inspection. ITC-BT-05 separately identifies the installations that an authorised inspection body must inspect before commissioning, including public occupancy premises. The Generalitat classifies installations subject to initial and periodic inspection as P1. Installations that required an initial inspection are generally inspected periodically every five years, although the applicable interval should always be checked against current official criteria. [6] [7]

• Project and inspection are separate requirements.
• Where mandatory, the initial inspection must take place before commissioning.
• The inspection body is distinct from the installer and project designer.
• The real use and characteristics of the premises determine its classification.

Documents and registration in RITSIC

For an installation requiring a project, the holder should have the responsible declaration, project, works supervision and completion certificate, electrical installation certificate and initial inspection certificate where applicable. The holder must also retain evidence that the installation has been entered in RITSIC, the Registre d’Instal·lacions Tècniques de Seguretat Industrial de Catalunya, or Register of Technical Industrial Safety Installations of Catalonia. [8]

Where a technical design report is sufficient, the file includes documents such as the ELEC-3 technical report, ELEC-2 single-line diagram, electrical installation certificate, operating and maintenance instructions and a plan showing the cable routes. ELEC-1 and ELEC-4 may also apply according to the type of file and current procedure. Forms, names and submission requirements can change, so the latest versions should be checked through Canal Empresa or Tràmits Gencat before filing. [8]

The holder submits an electronic responsible declaration to the Generalitat for commissioning, extending, altering or decommissioning the installation. Not every technical document necessarily has to be uploaded with the online form, but the holder must possess and retain the required records throughout the installation’s service life. RITSIC registration does not replace the Barcelona activity licence or notification, a works procedure or requirements related to the electricity supply. [8]

• Responsible declaration and RITSIC registration receipt.
• Project or technical design report, according to classification.
• Certificate issued by the authorised electrical installation company.
• Completion and initial inspection certificates where required.
• Single-line diagram, plans, instructions and records of later alterations.

A practical process before and after refurbishment

Before renting, buying or refurbishing commercial premises, ask the owner for the existing installation certificate, original project or technical report, RITSIC receipt, single-line diagram, documented maximum admissible power and any inspection reports. Missing paperwork does not automatically prove that the installation is unlawful. Its age, registration history and previous alterations should first be investigated.

Next, define the activity and calculate the real electrical demand, taking account of machinery, air conditioning, kitchen equipment, lighting, wet areas and vehicle charging. Adding circuits or increasing the maximum admissible power is treated as an extension, while changing the characteristics of existing circuits is an alteration. Later work must have the corresponding documentation and registration, including consideration of previous extensions. [1]

Choose the documentation route before electrical work begins. The authorised installer can then execute and test the installation and issue the installation certificate. If an initial inspection is mandatory, an inspection body intervenes before commissioning. The responsible declaration is subsequently filed and the RITSIC receipt retained. Any supply application is handled separately with the electricity distributor, which should not be confused with the electricity retailer. [6] [7] [8]

• Collect existing certificates, drawings and registration evidence.
• Define the use, occupancy, risks and required power.
• Classify the work as a new installation, extension or alteration.
• Decide between a project and technical design report before starting.
• Complete testing, inspection and registration in the correct sequence.

Costs, timescales and common mistakes

The public administration fee is only one part of the cost. The supplied official procedure information quoted a fee of €34.85, but public fees can change and the current amount must be confirmed on Tràmits Gencat immediately before submission. The full cost may include the project or technical report, technical supervision, installation work, an inspection body and any physical upgrades. The official sources do not establish a single market price for these private services. [8]

The sources do not support a standard completion time. Timing depends on the condition of the installation, the defects requiring correction, whether a project is necessary and whether an inspection body must intervene. A meaningful assessment requires at least the proposed use, required power, available records and an examination of the distribution board, protective devices and circuits.

Frequent mistakes include confusing the electrical project with the activity project, treating the installation certificate or “boletín” as a substitute for a project, and starting refurbishment before classifying the premises. Other risks include considering only contracted power, requesting an increase without checking documented maximum admissible power, using an unauthorised installer, missing a compulsory inspection or relying on records from the previous business without reviewing the new use. [1] [6] [7]

• Do not commission electrical work before defining the required technical file.
• Do not assume that low power removes the need for a project.
• Coordinate electrical, activity and works procedures without treating them as one file.
• Check current fees, forms and administrative criteria through Canal Empresa.
• Keep certificates, plans, inspection reports and RITSIC receipts for the installation’s full service life.

Frequently asked questions

Is an electrical installation certificate enough to legalise commercial premises?

Not always. The certificate, often called a boletín, is issued by the authorised installation company after testing the installation. If its classification requires a project, technical supervision or initial inspection, the certificate does not replace those requirements.

Do all shops and offices in Barcelona need an electrical project?

No. The answer depends on the intended use, public occupancy, power, specific risks and scope of the work. Public occupancy premises require a project regardless of power. Other shops or offices may use a technical design report if they do not fall within an ITC-BT-04 project category.

Does RITSIC registration allow the business to open?

Not by itself. RITSIC concerns the industrial safety registration of the installation. The activity and any building works remain subject to their respective Barcelona municipal procedures. Contracting or modifying the supply with the electricity distributor is another related but separate process.