You will have to apply the reverse charge if you supply any of these services:

• constructing, altering, repairing, extending, demolishing or dismantling buildings or structures (whether permanent or not), including offshore installation services
• constructing, altering, repairing, extending, demolishing of any works forming, or planned to form, part of the land, including (in particular) walls, roadworks, power lines, electronic communications equipment, aircraft runways, railways, inland waterways, docks and harbours
• pipelines, reservoirs, water mains, wells, sewers, industrial plant and installations for purposes of land drainage, coast protection or defence
• installing heating, lighting, air-conditioning, ventilation, power supply, drainage, sanitation, water supply or fire protection systems in any building or structure
• internal cleaning of buildings and structures, so far as carried out in the course of their construction, alteration, repair, extension or restoration
• painting or decorating the inside or the external surfaces of any building or structure
• services which form an integral part of, or are part of the preparation or completion of the services described above - including site clearance, earth-moving, excavation, tunnelling and boring, laying of foundations, erection of scaffolding, site restoration, landscaping and the provision of roadways and other access works