In-Law Apartment Construction

I'm looking for an architect/drafter/structural engineer to help draw out the plan for an in-law apartment for my mother in Conroe, TX - specifically we are rebuilding the stairs to make a new hallway under the landing, with entrances in and out of the hallway - I already have a complete design and plan, and the kitchen designed and ready - I need assistance with:

- Structural details for modifications
- Formal drafting of construction plans

Ideal Skills and Experience:
- Experience in residential structural modifications
- Proficiency in architectural drafting
- Knowledge of local building codes and regulations

I think this is a quick project for someone experienced.

Timeframe is: Now