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Questions To Ask Your Contractor When Doing ADU/ADDITION/EXTENSION



|Last Updated: 18 Apr 2024

As you embark on the journey of building an Accessory Dwelling Unit (ADU), addition, or extension to your home, it's essential to consider every aspect of the construction process.

From selecting materials to managing subcontractors and ensuring compliance with permits, there are numerous details to address when you star a ADU construction. To help you navigate this complex endeavor with confidence, we've compiled a list of key questions to discuss with your contractor before construction begins. By asking the right questions upfront, you'll ensure a smoother and more successful building experience.



Keep these questions to your GC before starting:

  1. What items do I have to have picked out before the start of construction?
  2. Do you verify the sizes of things in comparison to plans as you go?
  3. What trades do you subcontract and how do you manage those subcontractors?
  4. What items can we change without changing the plans/permits?
  5. How do you weatherproof the home for rain/other conditions?
  6. Who purchases major items such as water heaters, AC units, etc?
  7. Are utilities included?
  8. Is trenching included?
  9. Who provides porta potty for the project duration?
  10. How often is debris hauled away?
  11. Do you need additional parking or special access to the property?
  12. How often do you visit the site?
  13. Which areas are insulation included and what type of insulation would be used?
  14. If I want more noise reduction, is additional insulation between rooms possible?
  15. Are There Ways to Save Costs on ADUs?


Building an ADU, addition, or extension is a significant undertaking, but with careful planning and clear communication, it can also be an incredibly rewarding one. By asking the essential questions outlined here and working closely with your contractor throughout the construction process, you'll not only ensure that your project stays on track and within budget but also that the end result meets your expectations and enhances your living space. Here's to a successful and fulfilling construction journey as you expand and enhance your home!


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