Communal garage electrical installation in Seville, Spain: lighting, ventilation, CO detection and EV charging

Communal garage electrical installation: everything it covers

An underground car park is the most complex part of a building’s electrical installation. It brings together the lighting of many aisles and ramps, the safety systems, the automatic door and, increasingly, the neighbours’ EV chargers. The Spanish Low Voltage Electrical Regulations treat garages as premises with a risk of fire or explosion (ITC-BT-29), and the Spanish Building Code adds fire safety (DB-SI) and air quality (DB-HS 3) requirements.

We take care of communal garage electrical installation in Seville, from the lighting to everything else:

• LED lighting with sensors, by zone, with sealed fittings.
• Emergency lighting and signage for routes and exits.
• Forced ventilation: power supply, control boards and starting of the extractor fans.
• Carbon monoxide detection: control panel, detectors and their link to the ventilation.
• Automatic door: power supply, control board, photocells and motor. See automatic garage doors.
• Garage electrical boards, with separate, clearly labelled circuits.
• Charging infrastructure for electric vehicles, individual or communal.

LED lighting with sensors

Many garages in Seville still run on their original fluorescent battens, permanently on or switched by a push button at each entrance. Replacing them with sealed LED fittings with occupancy sensors is the improvement that shows soonest on the communal electricity bill. We divide the garage into zones so only the aisle you are driving along lights up, and leave a minimum level on ramps, pedestrian accesses and doors, so nobody walks in in the dark. It is the same approach we apply to communal area lighting in stairwells and entrance halls.

Safety: emergency lights, ventilation and CO

Emergency lights must come on when the power goes and guide people to the exits. We check their duration and replace the ones that fail; see more in our emergency lighting service. Forced ventilation and CO detection go unnoticed until they fail: we check that the detectors switch on the extractors, that the motors start and that their protection devices are correctly sized.

EV charging in the garage

There are two routes, and it is worth the comunidad (the community of owners) understanding both before each neighbour runs their own cable:

• Individual chargers. Each owner installs their own point from their meter, with simple prior notice to the comunidad (article 17.5 of the Horizontal Property Act). The Supreme Court confirmed in its judgment of 1 December 2025 that no authorisation is needed even if the cable runs through common areas, unless the impact is disproportionate. This is our EV charger in a communal garage service.
• Communal pre-installation or backbone. A shared line with load management running through the garage, to which each neighbour later connects their charger. It is approved by one third of the owners and one third of the shares (article 17.1 of the Horizontal Property Act), and in large buildings it avoids filling the cable trays with dozens of cables. We explain it in the communal EV charging backbone.

With dynamic load management, ITC-BT-52 allows a simultaneity factor of 0.3 in the expected load, which protects the building’s incoming supply even with many cars plugged in at once.

New and older garages in Seville

• New builds in Sevilla Este, Palmas Altas, Los Bermejales, Entrenúcleos or Mairena del Aljarafe: large garages, with charging conduits to every space if the licence is after 16 December 2022, but no chargers. It is the moment to propose a communal backbone in the comunidad’s first year.
• Buildings from the 1970s and 1980s in Nervión or Los Remedios: basements with fluorescent lighting, boards without enough RCDs and damp in the boxes, which causes trips with the autumn rains.

OCA inspection of the garage

Garages with more than 25 spaces and forced ventilation must have an initial inspection and a periodic inspection every 5 years by an authorised inspection body (ITC-BT-05). We prepare the installation, accompany the inspector and fix the defects. Full details are in OCA inspection for buildings, and the garage can be included in building maintenance together with the other common areas.

Guide prices

Prices are a guide. You will find every other service for communities of owners on the homeowners’ associations page.