The area algorithm of decoration is calculated according to the quantity of each project. Usually, the contract is accompanied by a "Rules for Calculation of Engineering Quantity". The following are the calculation rules for each item.
All-inclusive way, you have to talk to the decoration company to identify the brand and unit price model of the main material equipment, and it is best to have an expert friend to help you in this process. The contract shall be accompanied by a list of Party B's decoration materials, which shall indicate the brands, unit prices and models of all materials used by the decoration company. Note: especially the hydropower materials and waterproof materials of concealed works, it is best to have someone check and accept them according to the standards in the table before the construction of each project, and someone will watch the process.
Grasping these major events basically grasps the overall situation. The so-called "299 399" is just an advertising behavior, which has no actual basis and is not objective. If you want to find a decoration company to do it, you must ask them to make a detailed budget quotation, including: the engineering quantity should be accurate, the unit price should be reasonable (market price), and the process standards and practices should be clearly written and detailed. Materials should have brand, unit price and place of origin.
It should be noted in the budget that the amount of water and electricity is collected in advance? Or finish the project? This is related to whether to increase the engineering quantity after the completion of the project.