I would partner with an architect or someone with experience reverse permitting.

Do you have experience or know an architect that familiar with Los Angeles  ADU laws?

@Cor Bay Document storage is still alive and well for architects and engineers.

I live in Denver and my property is a single family home, but the land is zoned to support a duplex.The house was separated into two units up/down when I bought it, with separate entrances, electricity and water.I'm looking to get the property zoned as a duplex and the city is asking for:- Need Site Plan that contains Reference Lots and Front Setback Dimensions- Spot grade elevation points at primary front setback and rear cornersAre these site plans something an architect needs to do?

If you're doing all new systems, new electric, new roof, etc. it's going to add up quickly.If you are going to use an architect, which you might need to do to get the building permit, ask the architect for some recommendations on who she/he would use.

Just means you need to bring in some professionals.For the drawings you can hire a draftsman or an architect.

Also get an experienced architect or engineer to walk you through - good luck

If you do end up hiring an architect to do the plans, most architects will want their own as is measurements for liability reasons.

Architects are also needed.

This property is in the Inland Empire, and we have an engineer/architect already with plans being submitted within the week to the city.