How Long It Takes to Build an ADU in LA County

How long does it take to build an ADU in LA County image 1

How Long Does It Take to Build an ADU in LA County?

It generally takes about three to six months months to build an ADU in LA County, California. There are various time factors that determine how long it takes to build an ADU.

When we say three to six months, we are referring to the amount of time it takes after hiring an ADU contractor in Los Angeles. But you also have to remember that finding and hiring the right contractor/construction company will take some time as well. If you add up the amount of time it may take homeowners to find and hire a contractor/construction company, then that additional time will be based on each homeowner.

Let’s briefly go over what some of the main factors are that affect how long it takes to build and ADU in LA County then we will discuss them each in further detail.

Time Factors of Building an ADU in LA County Include:

  • Finding and hiring a general contractor/construction company.
  • General contractor must prepare blueprints and all necessary paperwork in order to submit to the city.
  • City must approve blueprints and all necessary paperwork.
  • Contractor must complete all necessary construction after city approval.

Time Factors of Building an ADU in LA County Discussed in Further Detail

1. Finding and Hiring a General Contractor (Time it Takes: Generally 1 Week to 2 Months or More)

This process usually takes one week to two months or more based on how fast the homeowner acts and how fast the general contractor is able to provide a free estimate that the homeowner accepts.

We are including this as a factor because it does actually require some time and effort from the homeowner. This is due to the fact that it takes time to call companies/contractors, set appointments with companies/contractors, and hire the right company/contractor which would generally be after they prepare an estimate.

The amount of time it takes to find and hire a general contractor depends on the homeowner, currently existing conditions that surround them such as contractor availability, and the amount of time it takes for a contractor to prepare an estimate.

2. Contractor Must Draw Blueprints, Prepare Paperwork and Submit to City (Time it Takes: Generally 1 to 4 Weeks)

This process can take anywhere from one to four weeks. The factors that determine how long this process takes for the general contractor to complete is based on the scale of the project, capability of the contractor, and availability of the contractor.

If the project is small, the contractor is available and capable, then this process should be on the faster side. If the project is larger and more complex, it can take a bit longer to prepare the blue prints based on the amount of work that needs to be done by a contractor. Availability and capability of contractors are based on the contractors themselves so it is best to try and determine these two factors with the best of your ability by asking questions, interviewing, and examining before hiring anyone.

3. City Must Approve Blueprints and Paperwork (Time it Takes: Up to 2 Months)

Due to a recently passed law California Assembly Bill 68, cities now have a maximum of two months (60 days) to approve or deny blueprints and paperwork for ADU permits.

This process used to take up to four months (120 days) because that is the amount of time that the law used allow cities to have prior to assembly bill 68 being passed. As a result of required approval from the city in order to move forward with the project, this process can possibly be extended if plans are not approved by the city the first time they are submitted.

4. Contactor Must Complete All Necessary Construction Work (Time it Takes: Generally 1 to 2 Months)

This process of completing all necessary construction work generally takes one to two months. The factors that determine how long this process takes are once again based on the scale of the project, contractor capability, and contractor availability.

We have to take all the work that needs to be done into consideration. Therefore, in simple terms, the amount of time it takes to complete the construction work will be directly proportional to the amount of work that needs to be done. The more work that needs to be done, the longer it will take.

One varying factor of the scale of a project would be based on if it is a garage conversion in Los Angeles or a new ADU addition. Garage conversions are generally quicker than building a completely new ADU addition. This is due to the fact that the existing structure and foundation of a garage reduce the amount of work that needs to be done in comparison to building a new structure and foundation.

How to Calculate the Total Time It Will Take to Build an ADU in LA County

When adding up all the time factors above, it generally takes around three to six months to build an ADU after hiring a contractor/construction company.

In order to have a better idea of how long an individual homeowners project might take, the amount of time a homeowner takes to hire a contractor should be added to the average time of three to six months that’s needed after hiring the contractor. If you take two months to hire someone, you should add that two months to the three to six months needed after hiring the contractor in order to have a better idea of how long your project would take. In this case of taking two months to hire, you can add the two months time, to the average time of three to six months required after hiring someone, and that would turn your approximate ADU completion time to five to seven months.

Let’s calculate a few different examples of how long it will take to build and ADU based on how long it takes a homeowner to hire someone.

Example 1: If it takes a homeowner one month to search for and hire an ADU contractor.

Add the one month it took to search and hire someone, to the average of three to six months, making the total average four to seven months.

Mathematics of example 1:

(1 month searching) + (3 to 6 months additional time required) = 4 to 7 months average time to build an ADU in this case.

Example 2: If it takes a homeowner three months to search for and hire an ADU contractor.

Add the three months it took to search and hire someone, to the average of three to six months, making the total average six to nine months.

Mathematics of example 2:

(3 month searching) + (3 to 6 months additional time required) = 6 to 9 months average time to build ADU in this case.

Example 3: If it takes a homeowner five months to search for and hire an ADU contractor.

Add the five months it took to search and hire someone, to the average of three to six months additional time required, making the total average eight to eleven months.

Mathematics of example 3:

(5 month searching) + (3 to 6 months additional time required) = 8 to 11 months average time to build ADU in this case.

If you have any additional questions about how long it will take you to build an ADU in LA County, please feel free to get in touch with All American Builders anytime. You can give us a call at (844) 226-3314 or use the online form below.