There are specific rules for compliance with an ADU project which are quite easy to achieve, but you need to know them and apply them to each building. The number of units allowed, number of parking spaces sacrificed, location of ADU’s, etc. On your first call to and visit you will meet a Core Contractors Owner, not a salesperson. We will give you options, solutions, and the associated price to complete. You will make your decisions based on facts and your business savviness and as a building owner. Here’s our approach:

Our Program






ADU Calculator


How many units and where to place them.

Our initial evaluation determines the specific building condition and how to best accommodate ADU’s for the best fit, most economical cost, and fasters ROI. We discuss the needs and wants with the owner to develop the right plan for each building we visit.

existing conditions.

We review current site conditions that may impair or be a concern to the design/cost to try and avoid change orders. We look for existing drainage, available heights, what is above and what utilities need rerouting, we look at available utilities and how far they are from the proposed ADU location. In short, we customize the generic ADU design to fit the specific site conditions available for us. 

make it efficient.

We understand that the project needs to make sense. When Core Contractors walks the site, we keep that in mind knowing what works and what doesn’t. EFFICIENCY OR BUST!

final thoughts.

As always, Core Contractors offers this evaluation as a no cost, no obligation service. At Core Contractors, we don’t use high pressure sales team to over promise and under deliver. You will meet an owner and he will walk you through the process and answer all your questions and concerns. We are in this for the duration. At Core Contractors, we want you as a client but we also want you as a reference to your friends and family who can also benefit from an ADU project in their building.


Core Contractors has designed and developed the most cost efficient ADU program available to apartment building owners. Contract us here to receive a no obligation free evaluation and a site specific proposal to complete your ADU project.