if your going for commercial contracts what you need is an info pack with with your company name on the front and then
1.an introduction of who you are
2. Mission statement
3.Health and safety policy
4. levels of insurance cover , vat number etc
5.What type of cleaning services you provide
6.List any contracts youve already got or completed
Place it all in a see through A4 plastic folder the ones you get from staples looks nice and professional