Site plan needed for re-zoning single family to duplex

[Chandler Burton]

Hello!

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 corners

Are these site plans something an architect needs to do? Has anyone used an online service such as getasiteplan.com ?

Thanks in advance.