Construction Site Safety and Health: Legal Requirements and Best Practices

There is a statistic that has stayed with me ever since I started in this industry: construction consistently ranks among the highest-risk sectors for workplace accidents in Spain. Year after year, data from the Ministry of Labour confirms it — falls from height, struck-by incidents, crush injuries, musculoskeletal strains. Behind every number is a person. And the vast majority of those accidents were preventable.

I have been managing construction projects of various types for over fifteen years, and I can tell you honestly that site safety is not red tape. It is culture. It is leadership. And yes, it also has a legal dimension that we cannot ignore, because the consequences of ignoring it are devastating — both humanly and financially.

Today I want to go through the legal framework for Occupational Health and Safety (OHS) in construction in Spain, the documents you need to have in place, the mandatory roles, and how digital tools are changing the way we manage all of this.

The Legal Framework Governing OHS in Construction in Spain

Law 31/1995 on Occupational Risk Prevention

Everything starts with Law 31/1995 of 8 November on Occupational Risk Prevention (Ley de Prevención de Riesgos Laborales). This law transposes the EU Framework Directive 89/391/EEC into Spanish law and sets out the general obligations of both employers and workers with regard to safety.

The fundamental principles it establishes are:

• Avoiding risks at source, not merely protecting against them
• Evaluating risks that cannot be fully eliminated
• Combating risks at the point of origin
• Adapting work to the person, not the other way around
• Replacing dangerous elements with those that carry little or no risk
• Planning prevention before work begins
• Providing adequate instructions to workers

The law is unambiguous: the employer has an obligation of result, not merely of means. Having signed documents in a folder is not enough. Prevention must be real and effective.

Royal Decree 1627/1997: The Construction-Specific Regulation

If Law 31/1995 is the general umbrella, Royal Decree 1627/1997 of 24 October is the regulation that specifically governs minimum safety and health requirements on construction sites. This is the one that professionals in the sector know well.

This RD introduces key concepts that every construction professional needs to understand:

• The Safety and Health Study (Estudio de Seguridad y Salud, ESS) or the Basic Study (EBSS), depending on the scale of the project
• The Safety and Health Plan (Plan de Seguridad y Salud, PSS), drafted by the main contractor
• The Safety and Health Coordinator, both during the design phase and during execution
• The Prior Notice (Aviso Previo) to the labour authority before work begins
• The obligations of each party: the developer (promotor), main contractor, subcontractors, and self-employed workers

One detail many overlook: RD 1627/1997 applies to all construction work, including full residential refurbishments. It is not only for large new-build projects.

Other Relevant Complementary Legislation

The legal framework does not end there. A number of additional regulations directly affect construction sites:

• RD 773/1997: personal protective equipment (PPE)
• RD 1215/1997: work equipment
• RD 614/2001: electrical risk
• RD 2177/2004: work at height (scaffolding, ladders, rope access)
• RD 171/2004: coordination of business activities (especially relevant when subcontractors are involved)
• Law 32/2006: subcontracting in construction

The Subcontracting Law deserves particular mention, as it regulates the maximum permitted level of subcontracting on a site (generally two levels) and requires all companies involved to be registered in the Register of Accredited Companies (Registro de Empresas Acreditadas, REA) of the relevant autonomous community.

The Safety and Health Plan: The Central Document

The Safety and Health Plan (PSS) is the document drafted by the main contractor, based on the Safety and Health Study (or Basic Study) prepared by a competent technical designer appointed by the developer. In practice, it is the adaptation of that study to the specific conditions of how the project will actually be built.

What Must the PSS Include?

A thorough, well-constructed PSS should cover:

• Project description and construction process: what is being built, how, and in what sequence
• Risk identification: analysis of all risks present in each phase and task
• Preventive measures: for each identified risk, the specific action to be taken
• Required PPE: which personal protective equipment is needed for each activity
• Emergency procedures: what to do in the event of an accident, fire, or evacuation
• Training and information: what information workers receive and at what point
• Planning of preventive activity: schedule of inspections, reviews, and safety meetings

Who Approves It?

The PSS must be approved by the Safety and Health Coordinator for the execution phase before work begins. That coordinator must be a competent technical professional (architect, building engineer, civil engineer, or technical engineer) appointed by the developer. Their signature on the PSS is a mandatory prerequisite before the site can open.

Additionally, the PSS must be available on site at all times for inspection by the Labour Inspectorate (Inspección de Trabajo y Seguridad Social, ITSS) or the regional labour authority.

The Safety Coordinator: A Role That Cannot Be Treated as a Formality

One of the biggest mistakes I have seen in medium-sized companies is treating the safety coordinator as an administrative tick-box exercise. "We will put someone in to sign the paperwork." That is an error with potentially serious consequences.

The safety coordinator during the execution phase has very specific legal responsibilities:

• Coordinating the application of the PSS during construction
• Organising coordination between main contractors, subcontractors, and self-employed workers
• Approving amendments to the PSS when necessary
• Halting works when a serious and imminent risk is identified
• Recording in the Site Incident Log (Libro de Incidencias) any anomaly or non-compliance

The power to halt works is significant: the coordinator has a legal obligation to do so if they identify a situation of serious risk. It is not optional — it is a duty.

PPE Management: Beyond the Signed Delivery Note

The management of Personal Protective Equipment (PPE) is one of the areas where I most frequently see deficiencies on site. Handing out a hard hat and getting a signature is not PPE management. At best, it is a minimal record.

Effective PPE management involves:

Correct Selection

Not all PPE is equivalent. The employer must select the appropriate equipment for each specific risk, verify that it carries the correct CE marking, and ensure it is the right category (I, II or III depending on the hazard level).

Documented Delivery and Training

Delivery must be recorded individually for each worker. But it must also be accompanied by instructions for use, maintenance, and service life. A safety harness past its expiry date that has taken a significant impact no longer offers the manufacturer's protection guarantees — it is an added risk in itself.

Periodic Replacement

PPE has a service life. The hard hat that has been on site for three years and taken a significant knock no longer meets the manufacturer's safety guarantees. The employer is responsible for replacing items when necessary.

Monitoring Actual Use

Having all PPE delivered and signed for means nothing if nobody on site actually uses it. Supervising real-world use is an obligation of the foreman and site manager, and of the safety coordinator themselves.

Accident Statistics in Construction: Data You Need to Know

According to the State Observatory of Working Conditions (Observatorio Estatal de Condiciones de Trabajo), the construction sector consistently records one of the highest incidence rates of all economic activities in Spain. Fatal accidents in construction represent roughly 20–25% of all fatal workplace accidents, with figures ranging between 60 and 100 fatalities per year in the sector (varying with economic cycles and levels of activity).

The primary causes of fatal accidents are:

• Falls from height (historically the leading cause, particularly from structures, roofs, and scaffolding)
• Crush and entrapment injuries (machinery, vehicles, structures)
• Projection of fragments or objects
• Electrical contact
• Collapses and subsidence

These figures carry a direct message: the vast majority of these deaths occur in situations that the PSS should have identified as high-risk, and for which specific preventive measures should exist. When they happen, there is almost always a gap between what the document says and what actually happens on site.

Liability and Consequences of Non-Compliance

Violations of OHS regulations in construction are governed by the Consolidated Text of the Law on Offences and Penalties in the Social Order (TRLISOS). Penalties can be:

• Minor infringements: up to €2,045
• Serious infringements: between €2,046 and €40,985
• Very serious infringements: between €40,986 and €819,780

But beyond administrative penalties, a serious accident can lead to criminal liability for the employer, the site manager, and even the safety coordinator. Article 316 of the Penal Code provides for prison sentences of 6 months to 3 years for those who, being legally obliged, fail to provide the means necessary for workers to carry out their work with the required safety measures.

And let us not forget the surcharge on social security benefits (recargo de prestaciones): when an accident occurs due to a failure to implement safety measures, the Social Security authority can impose on the employer a surcharge of between 30% and 50% on the victim's benefits. That surcharge cannot be insured against.

Digitalisation as a Compliance Tool

For years, OHS management on site was a paper-based affair: folders holding the PSS, PPE delivery notes, signature sheets for safety briefings. The problem with paper is that it gets lost, gets wet, cannot be indexed, and does not alert you when something expires.

Digitalising OHS management delivers concrete benefits:

Document Centralisation and Traceability

All worker documentation — contract, social security registration, training certificates, medical fitness certificates, PPE delivery records — accessible from a single point, with a change history and timestamps.

Automatic Alerts

When a worker's medical assessment has expired, when a machine's technical inspection is due, when height-work certification lapses... A digital system can send advance warnings rather than allowing these to be discovered during an inspection.

Digital Records of Briefings and Training

A worker's signature on a tablet or mobile phone carries the same legal validity as paper and is infinitely easier to retrieve. Some systems can even record the geolocation of the signature.

Site Access Control

Verifying that only workers with all documentation in order — OHS training, medical clearance, social security registration — can access the site is a compliance obligation that, with digital tools, can be largely automated.

Platforms like Constrack allow you to centralise personnel documentation and have a real-time view of each worker's compliance status. When you are running several simultaneous sites with dozens of your own workers and subcontractors, managing this on paper or with spreadsheets is a near-guarantee that something will fall through the cracks.

Safety Culture: What Documents Alone Cannot Do

I want to close with what I believe matters most and what is often missing from the manuals: documents do not create a safety culture. Behaviours do.

A site manager who climbs into the excavation without a hard hat is sending a more powerful message to the entire crew than any safety briefing ever could. A foreman who looks the other way when someone is not wearing a harness is normalising risk.

Occupational safety in construction starts with visible leadership:

• Lead by example: site management and foremen always wearing the correct PPE, without exception
• Stop when there is a risk: normalise halting production when an unsafe situation is identified, without penalising the person who reports it
• Ongoing training, not one-off: not just the initial 20-hour induction, but periodic briefings — especially when there are changes on site (a new phase, a new subcontractor, adverse weather)
• Investigate accidents and near misses: every incident without consequences is a signal that something in the prevention system has failed. Ignoring it is a guarantee of the next accident with casualties

Safety on site is not the enemy of productivity. It is its prerequisite. A site with accidents is a site with delays, low morale, added costs, and legal exposure. Internalising this is the first step to managing it well.