According to Nice classification heading for class 37 states Building construction; Repair; Installation services are include in Class 37. The heading gives you a brief broad overview about what exactly is including in a particular class.
This Class includes, in particular: – services relating to the construction of buildings, roads, bridges, dams or transmission lines and services of undertakings specializing in the field of construction such as those of painters, plumbers, heating installers or roofers; – services auxiliary to construction services like inspections of construction plans; – services of shipbuilding; – services consisting of hiring of tools or building materials; – repair services, i.e., services which undertake to put any object into good condition after wear, damage, deterioration or partial destruction (restoration of an existing building or another object that has become imperfect and is to be restored to its original condition); – various repair services such as those in the fields of electricity, furniture, instruments, tools, etc.; – services of maintenance for preserving an object in its original condition without changing any of its properties (for the difference between this Class and Class 40 see the Explanatory Note of Class 40). This Class does not include, in particular: – services consisting of storage of goods such as clothes or vehicles (Cl. 39); – services connected with dyeing of cloth or clothes (Cl. 40).