Prefab & Modular Site Facilities

NLS Contractors supplies and installs prefab and modular site facilities in Saudi Arabia: insulated containers and generator rooms, site offices, welfare units, guard houses and accommodation blocks. Units arrive insulated and wired for air conditioning, are placed by crane, and are connected to site power, water and drainage.

Site facilities are the first thing a project needs and the last thing its programme plans for. Offices, welfare units, a generator room and a guard house all have to be on site before the main works start, so the lead time of the cabin factory sits on the critical path.

Most units are built on a steel base frame with insulated sandwich panel walls and roof, with PU, PIR or rockwool cores. Rockwool is the choice where a fire rating is specified, such as around a generator. Container-based units follow ISO 668 dimensions and ISO 1496-1 construction, which matters for lifting and stacking. Saudi summer heat decides the air conditioning load, so cooling is sized with the unit instead of added later.

Generator rooms and electrical rooms carry more engineering. The generator maker sets the airflow, and for emergency and standby sets NFPA 110 with the project specification covers the installation, so louvres, acoustic attenuation, fuel provisions and cable entries are designed together. Delivery is by trailer, lifting is by crane, and the base is a plinth or strip footing levelled before the unit arrives.

Where a facility stays longer than a project, as with a clinic, a classroom or a retail unit, modular buildings are joined from factory-built modules. SBC 201 (architectural), SBC 801 (fire protection) and SBC 301 loads apply once the use is permanent, so the design is checked against them and not against a site cabin catalogue. Accommodation blocks add their own services load: power, water, sewage storage or connection, fire detection and escape routes.

Remote sites lean on this work. NEOM and Tabuk jobs, long highway sections and plant shutdowns need facilities that arrive complete. A usable enquiry gives the unit list with sizes, the layout, the site city, the utilities available and the date the units must be usable.

Related products

Insulated Containers & Generator Rooms

NLS Contractors supplies and installs insulated ISO-frame containers for generators, switchgear and electrical rooms in Riyadh, Jeddah, Dammam and Khobar and across the Kingdom. Each unit has louvres, acoustic attenuation, cable entries, lighting and air conditioning, built to ISO 668 dimensions and ISO 1496-1. Handover includes GA drawings, a ventilation calculation summary, and inspection and installation records.

Site Offices & Welfare Units

NLS Contractors supplies and installs portable site offices and welfare units in Riyadh, Jeddah, Dammam and Khobar and on remote sites: offices, meeting rooms, toilet and ablution blocks, canteens and prayer rooms. Units use insulated sandwich panels with air conditioning, lighting and plumbing connections. Handover includes layout drawings, a delivery and installation record and a handover checklist.

Modular & Portable Buildings

NLS Contractors supplies and installs factory-built modular buildings in Riyadh, Jeddah, Dammam and Khobar and across the Kingdom: clinics, classrooms, retail units and project headquarters. Modules on a steel frame with insulated panels are joined on site, and permanent use is checked against SBC 201, SBC 301 and SBC 801. Handover includes module drawings, MEP layouts and an installation record.

Guard Houses & Kiosks

NLS Contractors supplies, delivers and installs prefabricated guard houses, gate cabins, security kiosks and ticket booths in Riyadh, Jeddah, Dammam and Khobar and across the Kingdom. Units arrive complete with windows, counters, air conditioning and lighting, and are placed by crane or truck-mounted lift. Handover includes drawings, a delivery and placement record and a handover checklist.

Accommodation Blocks & Camp Units

NLS Contractors supplies and installs accommodation blocks and camp units in Riyadh, Jeddah, Dammam and Khobar and on remote sites: stacked cabin blocks, dormitories, mess halls, laundry and ablution blocks with their electrical, plumbing, air conditioning and fire detection. Fire provisions follow SBC 801 and Civil Defense. Handover includes the camp layout, MEP drawings and an installation record.

Frequently Asked Questions

How long does delivery of site cabins take?+

It depends on the unit type, quantity and the factory's queue, so the offer states a delivery period per line instead of one general number. Standard sizes move faster than custom layouts.

What is the difference between a container-based unit and a modular building?+

A container-based unit is built in an ISO-frame steel box and is easy to lift, stack and relocate. A modular building is joined from larger factory-built modules into one permanent-style structure with its own foundations.

Can a generator room be built to NFPA 110?+

Yes, where it houses an emergency or standby generator. The generator maker sets airflow and fuel requirements, and NFPA 110 with the project specification governs the installation. Louvres, acoustic attenuation and fire-rated panels are designed with the room, not added afterwards.

What does site installation involve?+

A levelled plinth or strip footing, crane lifting, fixing, then connection to power, water and drainage. The offer lists which of these steps it includes and what the site must provide first.