Commercial Property Agents London

I currently work in recruitment (IT Investment Banking), but I graduated in property development, 22 years and who wish to pursue a career in real estate market as an owner.

I collected a lot of research on the profession and have met some people in the industry, but I have yet to assemble a large part of understanding the financial benefits of employment? How much on average for the agent would win and structure of commission per transaction (see offers rental and sale of goods)?

They are between 1% to 5% on the sale of property and one month's rent as commission for properties leased through them.