One of the most common questions homeowners ask when planning structural renovations is: “How much does RSJ installation cost?” The cost of installing an RSJ steel beam can vary significantly depending on the size of the beam, the structural work involved and the complexity of the project. In most cases, RSJ installation as part of a load bearing wall removal project will typically range from around £2,000 to £6,000+, although larger or more complex structural alterations can exceed this. An RSJ, also known as a rolled steel joist, is a structural steel beam used to support the weight of the property when a load bearing wall is removed. These beams are commonly installed during open-plan kitchen renovations, knock through projects, extensions and major structural alterations. The biggest factor affecting cost is usually the size of the opening being created. Larger openings require larger steel beams and often involve more labour, additional temporary supports and more complex installation methods. The weight and size of the beam itself can also affect the project significantly. Some steel beams are extremely heavy and may require specialist lifting equipment or additional labour to safely manoeuvre them into place. Structural engineer calculations are also normally required before installation begins. These calculations determine the correct beam size and support requirements for the property and typically cost around £300 to £800 depending on the project. Building regulations approval is usually needed as well to ensure the work complies with current structural safety standards. Access can also influence pricing. Properties with restricted access or difficult installation conditions may require additional time and labour to complete the work safely. Older homes can sometimes reveal hidden structural complications once walls are opened up, which may increase the overall scope of work. As a rough guide, smaller steel beam installations for straightforward internal wall removals may cost approximately £2,000 to £4,000. Medium-sized open-plan projects often range between £4,000 and £6,000. Larger structural alterations involving wide openings, multiple beams or complex support requirements can exceed £8,000+ depending on the scale of work involved. Many homeowners researching RSJ installation costs are planning open-plan renovations because they want to create larger, brighter and more functional living spaces. While budget is naturally important, structural work should never be approached purely based on the cheapest quote. Incorrectly installed steel beams can lead to serious structural and safety issues that become extremely expensive to rectify later. At Structural Projects North West, we specialise in RSJ installations, load bearing wall removals and structural alterations across Manchester and the North West. We regularly work alongside structural engineers and building control to ensure every project is completed safely, professionally and to the correct standards. Our experienced team helps homeowners understand the structural process clearly while delivering reliable workmanship and high-quality installations throughout every stage of the project. If you’re planning structural alterations and want honest advice on RSJ installation costs, structural requirements and the safest approach for your property, contact Structural Projects North West today to discuss your project.