If you are doing large-scale tooling, you need talents with professional electrical design qualifications, subordinate design units with design qualifications, and the drawings should be stamped with the official seal of the company. This requires about 10- 15 yuan per square meter, with an area of at least 1000 square meters. If it is a small project, the price can be adjusted appropriately. If you don't need an official seal, you should just make a map in Yiping, 5 yuan.
There is no pattern to follow. You should decide according to the local charges of the same industry. Generally speaking, if it's not for Party A, your profit will drop relatively. If you are just starting out, I suggest you don't look at the profit too high, and first establish the reputation and business relationship of your studio.
In this way, after the business and personal relationship matures, you will gradually set the price, and then master your budget in all aspects, and naturally there will be a reasonable charging method. It is possible to make renderings alone. If the effect diagram is added to the construction drawing, it means pure design. There is no fixed price for renderings, depending on your ability. Generally, it starts at 200 yuan, but there are also hundreds of thousands of powerful ones and 100.