ADU in Los Angeles area - how to split utility bills?

[Michael Schnyder]

I'm having an ADU built from a detached garage which will be a 2/1, approx. 750 sf. The single family house is a 3/2 approx. 1200 sf.
The utilities are LADWP and gas, both properties would be on the same shared meters. 

Would love to get suggestions from those of you in the LA area on what would be the best way to split the utility bills?

Thanks~