CAEN Code Rev. 3

4324

Other installation works for construction

EU NACE Equivalent: NACE Rev. 3 — 4324

This code covers installation works not included in other CAEN codes, such as mounting heating, ventilation, air conditioning, sanitary, electrical or security systems. Essentially, any installation not specific to another code (e.g., gas installations, sprinklers, alarm systems) falls here. It is a versatile code, used by companies executing general installation works in construction.

Entrepreneur Profile

Acest cod este potrivit pentru firme de instalații generale, antreprenori individuali sau SRL-uri care execută lucrări de instalații diverse în construcții, fie ca subcontractori, fie ca antreprenori generali. De asemenea, este util pentru specialiști în instalații care doresc să ofere servicii complete, de la montaj la mentenanță, fără a se limita la un singur tip de instalație.

Who should avoid:

Avoid the exclusive use of code 4324 if the main activity of your company shifts towards other commercial or related branches not specified in the official description. See the excluded activities section below.

Authorization procedure and Trade Register aspects for CAEN 4324

Setting up a company with the main activity CAEN 4324 (Other installation works for construction) follows the standard procedure at the Trade Register (ONRC), but involves specific peculiarities of the field. When submitting the registration application, the CAEN 4324 code must be explicitly stated as the main or secondary activity, depending on the fiscal strategy. For authorized natural persons (PFA) or individual enterprises, the same rules apply, but it is recommended to check professional qualifications in advance, as certain installation works require technical certificates (e.g., ISCIR authorization for pressure installations).

Regulatory framework, specific permits and control institutions

The activity carried out under CAEN 4324 is regulated by Law 50/1991 on the authorization of construction works execution, supplemented by the Methodological Norms for application. Depending on the specific works (sanitary, heating, ventilation, air conditioning, low-voltage electrical installations, etc.), permits may be required from the ISU (for fire safety), the Tax Authority (ANAF) (for tax registration), or the Ministry of Labour (for occupational safety standards). Also, for works involving natural gas or electrical installations in explosive atmospheres, authorization is mandatory according to ANRE (National Regulatory Authority for Energy) or IRC (State Inspection for the Control of Boilers, Pressure Vessels and Lifting Equipment) norms. Current control is carried out by the State Inspectorate in Construction (ISC) and local urban planning authorities.

Fiscal management, ANAF audit risk and specific accounting

From a fiscal perspective, companies with CAEN 4324 must register as taxpayers with the Tax Authority (ANAF) and declare the corresponding fiscal vector. Profit tax or micro-enterprise tax applies depending on turnover and number of employees, and for services (assembly, maintenance) it is recommended to register in the RO e-Factura system for real-time monitoring. The risk of ANAF audit is increased for works involving fiscally deductible construction materials, such as pipes, cables, air conditioning units, where supporting documents (invoices, receipt notes, consumption notes) must be properly kept. The accounting records must distinctly reflect the value of the executed works, labor and materials used, to avoid VAT adjustments at year-end. Also, for works carried out on sites outside the headquarters, it is necessary to check obligations regarding social contributions paid for traveling personnel.

It is not recommended to apply the special VAT regime on collection (VAT at collection) for legal entities performing works with a long execution cycle, as it generates settlement delays. Instead, it is recommended to register as a VAT payer on collection only if the company predominantly performs works for individuals who pay late. For contracts with public institutions, the standard VAT rate (19%) applies, and for social housing, where applicable, the reduced rate of 5%, provided the legal criteria are met.

Specific accounting includes account groups for stocks (301, 302), intangible fixed assets (concessions, patents), and income accounts for services (704, 705). Depreciation documents for used machinery (scaffolding, welding machines, drilling machines) are prepared over the useful life established by the accounting policy. Regarding human resources management, it is recommended to conclude individual employment contracts for craftsmen, in compliance with specific occupational safety standards and providing personal protective equipment (height work equipment, gloves, goggles).


Included Activities

  • ✅ Mounting central heating systems (radiators, boilers, furnaces)
  • ✅ Mounting ventilation and air conditioning systems (air conditioners, fans, heat recovery units)
  • ✅ Mounting sanitary installations (sinks, toilets, bathtubs, showers, water and sewer pipes)
  • ✅ Mounting fire alarm and burglar alarm systems
  • ✅ Mounting lighting systems and light fixtures
  • ✅ Mounting gas distribution systems (pipes, valves, meters)
  • ✅ Mounting sprinkler and fire extinguishing systems
  • ✅ Mounting underfloor heating systems
  • ✅ Mounting solar thermal energy systems (solar panels for hot water)
  • ✅ Mounting building automation systems (smart home)
  • ✅ Mounting elevators, escalators and automatic doors
  • ✅ Mounting soundproofing and thermal insulation systems for installations

Excluded Activities

  • ❌ Producția de echipamente și materiale pentru instalații (coduri CAEN din secțiunea C)
  • ❌ Instalarea sistemelor electrice de înaltă tensiune (cod 4222)
  • ❌ Lucrări de instalații electrice în clădiri (cod 4321)
  • ❌ Lucrări de instalații sanitare, de încălzire și de aer condiționat (cod 4322)
  • ❌ Lucrări de izolații (cod 4329)
  • ❌ Activități de proiectare și consultanță tehnică (cod 7112)
  • ❌ Întreținerea și repararea echipamentelor de instalații (cod 3312, 3314 etc.)

Întrebări Frecvente

What authorizations are required to work with CAEN code 4324?

For installation works, ISCIR authorization is required for pressure installations (boilers, furnaces) and ANRE authorization for electrical installations. Also, for gas installations, ANRGN authorization is mandatory. Check the specific legislation for each type of installation.

Can I invoice both materials and labor with this CAEN code?

Yes, code 4324 allows both supply of materials and execution of works. However, for materials, it is recommended to also have the corresponding CAEN code for trade (e.g., 4759 for retail trade of equipment). Ensure that invoicing correctly reflects the activity performed.