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Employment lawyer in construction: comply with the most demanding sector in Spain

The construction sector operates under the most complex collective agreement in Spain: the General Building Sector Collective Agreement (CGSC) regulates occupational categories, working hours, project-linked bonuses, subcontracting arrangements, and safety conditions in a level of detail that exceeds most other agreements. To this is added an elevated rate of workplace accidents, meaning every serious incident becomes a potential criminal action against the company administrator, and a subcontracting chain that generates joint and several liability in employment and Social Security matters for the principal contractor.

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Why BM Consulting

Specialised advice and personal service

At BMC we advise construction companies on the comprehensive management of their employment relations: agreement application, project-based contract design, subcontracting management, ERTE, dismissals, representation before the Labour Inspectorate, and defence in workplace accident proceedings. We know the CGSC and the regional sector agreements, and we act with the speed that the dynamic nature of the construction industry demands.

  • The General Building Sector Collective Agreement (CGSC) is mandatory for all construction and civil engineering companies regardless of size — occupational categories, project bonuses, safety obligations, and subcontracting rules are all regulated in exhaustive detail.

  • The principal contractor bears joint and several liability for wage and Social Security debts of subcontractors for up to one year after project completion, requiring active monitoring of the entire subcontracting chain.

  • Project-specific employment contracts terminate when the project concludes

    the worker receives 12 days per year of service as redundancy payment (Art. 49.1.c ET) — the 2022 labour reform restricts project contracts to CGSC-defined circumstances only.

  • Workplace accidents with a causal link to safety failures can result in criminal liability for the administrator under Art. 316 CP and a 30–50% Social Security benefit surcharge — the Health and Safety Plan and worker training records are the primary line of defence.

How we work

From first contact to case completion

  1. Employment compliance audit

    We review compliance with the applicable collective agreement, staff contracts, working time records, subcontracting conditions, and the subcontracting register. We identify risks before the Inspectorate arrives.

  2. Project-based contract management

    We design the employment structure for each project: indefinite contracts for core staff, project-specific contracts for workers tied to a particular project (under CGSC conditions), and fixed-term arrangements for activity peaks. We draft and formalise all contracts.

  3. Workplace accident management

    When a serious workplace accident occurs, we activate our response protocol: notification to the labour authorities, internal investigation, coordination with the accident mutual and legal advice throughout any criminal or administrative proceedings that may follow.

  4. ERTE and workforce restructuring

    We manage ERTE procedures on economic, technical, organisational, or productive grounds when a project concludes or activity falls. Where the situation requires a collective redundancy, we negotiate with employee representatives and coordinate the entire process.

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The problem

The construction sector operates under the most complex collective agreement in Spain: the General Building Sector Collective Agreement (CGSC) regulates occupational categories, working hours, project-linked bonuses, subcontracting arrangements, and safety conditions in a level of detail that exceeds most other agreements. To this is added an elevated rate of workplace accidents, meaning every serious incident becomes a potential criminal action against the company administrator, and a subcontracting chain that generates joint and several liability in employment and Social Security matters for the principal contractor.

Our solution

At BMC we advise construction companies on the comprehensive management of their employment relations: agreement application, project-based contract design, subcontracting management, ERTE, dismissals, representation before the Labour Inspectorate, and defence in workplace accident proceedings. We know the CGSC and the regional sector agreements, and we act with the speed that the dynamic nature of the construction industry demands.

Process

How we do it

1

Employment compliance audit

We review compliance with the applicable collective agreement, staff contracts, working time records, subcontracting conditions, and the subcontracting register. We identify risks before the Inspectorate arrives.

2

Project-based contract management

We design the employment structure for each project: indefinite contracts for core staff, project-specific contracts for workers tied to a particular project (under CGSC conditions), and fixed-term arrangements for activity peaks. We draft and formalise all contracts.

3

Workplace accident management

When a serious workplace accident occurs, we activate our response protocol: notification to the labour authorities, internal investigation, coordination with the accident mutual and legal advice throughout any criminal or administrative proceedings that may follow.

4

ERTE and workforce restructuring

We manage ERTE procedures on economic, technical, organisational, or productive grounds when a project concludes or activity falls. Where the situation requires a collective redundancy, we negotiate with employee representatives and coordinate the entire process.

Employment law in construction: a sector with its own rules

Construction is one of the most complex sectors in Spanish employment law. The General Building Sector Collective Agreement, which applies nationally, is one of the most extensive and technical agreements in Spain: it regulates occupational categories, working hours, project-linked bonuses, leave, and safety conditions in a level of detail that requires specific expertise to apply correctly.

At BMC we have employment lawyers with direct experience in the construction sector. We know the CGSC and the provincial agreements in the main regions, and we act with the speed that the project-based nature of a construction business demands when problems arise and immediate answers are needed.

Subcontracting: managing the liability chain

Subcontracting is structural in construction. But with subcontracting comes joint and several liability: the principal contractor may be held liable for the wage and Social Security debts of its subcontractors in respect of workers employed on the project. This liability can extend for up to one year after the engagement concludes.

We advise on the design of subcontracting agreements, on the controls the principal contractor must exercise over the subcontractor, and on the management of the mandatory subcontracting register on projects with an approved plan. An adequate control system significantly reduces the risk of joint and several liability.

Workplace accidents: response protocol and defence

When a serious workplace accident occurs on a project, the first hours are critical. Notification to the labour authorities, internal investigation of the accident, coordination with the accident mutual, and preservation of safety documentation are actions that must be taken immediately and correctly.

At BMC we have a response protocol for serious workplace accidents that includes: legal assistance to the administrator at the appearance before the Labour Inspectorate, advice throughout any criminal proceedings, and representation in the benefit surcharge procedure before the Labour Inspectorate and Social Security authorities.

Managing a workforce at the pace of project activity

Construction companies have a workforce that expands and contracts with the rhythm of contracted projects. Managing this cycle efficiently — engaging staff when there is work and reducing headcount when there is not — without breaching employment law is one of the sector’s constant challenges. ERTE on productive grounds, termination of project-end contracts, and geographical mobility are the principal instruments of this management.

The 2022 labour reform and construction employment

The 2022 labour reform (RDL 32/2021) introduced specific provisions for the construction sector that reflect the sector’s unique employment model. Unlike other sectors where the project-specific fixed-term contract was abolished, construction retains a special project-linked contract under the General Building Sector Collective Agreement (CGSC) conditions — the CGSC itself regulates when and how project-specific contracts can be used.

The reform also requires construction companies to document more rigorously the connection between each project-linked contract and the specific project. Contracts that are not project-specific — or that extend beyond the natural conclusion of the designated project without formal extension — are presumed by law to be indefinite. For construction companies with large project workforces, auditing the alignment between active contracts and ongoing projects is an annual compliance exercise.

The fixed-discontinuous contract (contrato fijo-discontinuo) is now relevant for construction companies with recurring but intermittent project patterns — companies that win contracts cyclically and can anticipate future work, but cannot offer continuous employment. BMC advises construction companies on the optimal contract structure for each workforce segment under the post-reform rules.

Working time recording and overtime compliance in construction

Construction site working hours create specific compliance challenges. The CGSC contains detailed provisions on the standard working week, overtime rates, and project-linked bonus payments. Since the 2019 mandatory working time recording obligation came into force, construction sites must maintain daily time records for every worker on site — including subcontractor workers where the principal contractor has management and scheduling responsibility.

The ITSS inspects construction sites as part of its sector programme, focusing on: time recording accuracy, overtime declaration and payment, minimum rest periods between shifts, and safety record checks. A site with inadequate time records faces both a working time recording infringement (up to €7,500 per affected worker) and exposure to CGSC overtime premium claims if actual hours exceed declared hours.

BMC designs time recording protocols for construction sites that meet the statutory requirements and integrate with existing project management and payroll systems.

Dismissal and occupational classification disputes in the construction sector

Dismissal litigation in the construction sector frequently turns on occupational classification disputes: a worker’s entitlement depends on whether they are classified as a Peon Ordinario, an Oficial de Primera, or a Jefe de Equipo — each with different minimum wages and dismissal compensation under the CGSC. Classification errors can result in underpayment of wages throughout the employment relationship and inflated compensation calculations on dismissal.

Objective dismissal for production or economic grounds in a construction company requires documentary evidence that the grounds are genuine: a decline in project volume, loss of a major contract, or a technical change that eliminates the need for the role. The CGSC does not provide immunity from challenge — a dismissed CGSC worker has the same right to contest dismissal before the employment courts as any other employee. BMC prepares dismissal documentation to withstand tribunal scrutiny and represents construction companies in contested dismissal proceedings.

Equality plan and pay transparency obligations for construction companies

Construction companies with 50 or more employees must have a negotiated equality plan registered with the relevant labour authority. The historically male-dominated occupational structure of construction — with few women in site-based production roles and a small proportion in management — creates a specific equality plan challenge: the pay gap analysis must address genuine occupational segregation rather than individual pay discrimination.

The equality plan must include: a workforce diagnosis (occupational composition by gender, pay levels by category, promotion rates, work-life balance measures, and harassment prevention protocol), specific measures to address identified gaps, and measurable targets. BMC prepares equality plans for construction sector clients, including the statistical pay gap analysis required by RD 902/2020.

Companies without a registered equality plan by the statutory deadline are excluded from public contract and subsidy eligibility — a significant commercial consequence for construction companies dependent on public works contracts.

FAQ

Frequently asked questions

The CGSC is the national agreement governing employment conditions for workers in the construction and allied industries: general construction (building and civil engineering), prefabrication, industrial installation and assembly, and certain ancillary industries. It applies to any company whose principal activity falls within these categories, regardless of size. In addition to the CGSC, some regions have provincial agreements that may establish more favourable conditions. Determining which agreement applies to a specific company is the first step of any employment advisory engagement.
The principal contractor is jointly and severally liable for the employment and Social Security obligations of its subcontractors in respect of workers employed on the project, for one year after completion of the engagement. This includes wage debts and Social Security contributions. The principal contractor must also require the subcontractor to demonstrate that it is up to date with its Social Security obligations. The subcontracting register is mandatory on projects with an approved plan and must be held on site.
A project-specific employment contract terminates when the project or project phase for which the worker was engaged concludes. This termination is treated as an objective dismissal, entitling the worker to a redundancy payment of 12 days per year of service (since 2015). If the company has other projects under way, it may propose geographical mobility to another project. If there is no alternative, termination of the contract is the standard route. The 2022 labour reform restricts the project contract to the specific circumstances established in the CGSC.
In construction, ERTE on productive grounds is common when a project concludes and there is no immediate new project to absorb the workforce. The process includes notification to the Labour Authority, consultation with employee representatives (or directly with the employees where there is no works council), notification to SEPE, and resolution by the Labour Authority. Workers on ERTE receive unemployment benefit during the suspension, and the company may reactivate them when it secures new work.
If a serious or fatal accident results from a failure to implement health and safety measures, the administrator or the person responsible for safety may face criminal liability as the author of the offence under Article 316 of the Penal Code. At the administrative level, the company may incur surcharges of 30–50% on the Social Security benefits of the injured worker if the accident resulted from a failure to implement safety measures. Documentation of the Health and Safety Plan, worker training records, and records of measures adopted are the best defence.
The Subcontracting Register (Libro de Subcontratación) is a mandatory document on construction projects where safety planning has been approved. It records the identity and qualification of every subcontractor and self-employed person engaged on the project, from the principal contractor down. It must be held on site and made available to the Labour Inspectorate, works safety coordinators, workers' representatives, and preventive services. The register is the primary tool for verifying compliance with the Construction Subcontracting Act (Ley 32/2006), which limits the depth of subcontracting chains and prohibits the engagement of workers without adequate training and equipment. BMC reviews and maintains the subcontracting register for construction project clients.

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Frequently asked questions

Questions about Employment Lawyer for the Construction Sector

The CGSC is the national agreement governing employment conditions for workers in the construction and allied industries: general construction (building and civil engineering), prefabrication, industrial installation and assembly, and certain ancillary industries. It applies to any company whose principal activity falls within these categories, regardless of size. In addition to the CGSC, some regions have provincial agreements that may establish more favourable conditions. Determining which agreement applies to a specific company is the first step of any employment advisory engagement.
The principal contractor is jointly and severally liable for the employment and Social Security obligations of its subcontractors in respect of workers employed on the project, for one year after completion of the engagement. This includes wage debts and Social Security contributions. The principal contractor must also require the subcontractor to demonstrate that it is up to date with its Social Security obligations. The subcontracting register is mandatory on projects with an approved plan and must be held on site.
A project-specific employment contract terminates when the project or project phase for which the worker was engaged concludes. This termination is treated as an objective dismissal, entitling the worker to a redundancy payment of 12 days per year of service (since 2015). If the company has other projects under way, it may propose geographical mobility to another project. If there is no alternative, termination of the contract is the standard route. The 2022 labour reform restricts the project contract to the specific circumstances established in the CGSC.
In construction, ERTE on productive grounds is common when a project concludes and there is no immediate new project to absorb the workforce. The process includes notification to the Labour Authority, consultation with employee representatives (or directly with the employees where there is no works council), notification to SEPE, and resolution by the Labour Authority. Workers on ERTE receive unemployment benefit during the suspension, and the company may reactivate them when it secures new work.
If a serious or fatal accident results from a failure to implement health and safety measures, the administrator or the person responsible for safety may face criminal liability as the author of the offence under Article 316 of the Penal Code. At the administrative level, the company may incur surcharges of 30–50% on the Social Security benefits of the injured worker if the accident resulted from a failure to implement safety measures. Documentation of the Health and Safety Plan, worker training records, and records of measures adopted are the best defence.
The Subcontracting Register (Libro de Subcontratación) is a mandatory document on construction projects where safety planning has been approved. It records the identity and qualification of every subcontractor and self-employed person engaged on the project, from the principal contractor down. It must be held on site and made available to the Labour Inspectorate, works safety coordinators, workers' representatives, and preventive services. The register is the primary tool for verifying compliance with the Construction Subcontracting Act (Ley 32/2006), which limits the depth of subcontracting chains and prohibits the engagement of workers without adequate training and equipment. BMC reviews and maintains the subcontracting register for construction project clients.
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