ADU Contractor San Diego – ADSD

Welcome to ADU Contractor of San Diego County

What is an accessory dwelling unit?

Many homeowners across San Diego are now warming up to the idea of building an Accessory Dwelling Unit or ADU on their property. In the recent past, ADUs, or granny flats as they are also known, have become quite popular for their curb appeal, functionality, and increasing living space.

At ADSD, we have helped many homeowners build these modern additions on their property. From designing to getting San Diego County ADU plans approved, we are your go-to company for accessory dwelling units in the area.

But first, let us discover a little bit more about ADUs.

What is an ADU?

ADU is the acronym for accessory dwelling units. ADUs are also commonly referred to as granny flats, secondary units, backyard cottages and so much more.

ADU is a legal term that is used to describe a smaller dwelling unit that shares the same lot as a primary house. ADUs are commonly built to add an extra, livable space to generate income through rent.

Additionally, these granny flats are built to accommodate another member of the family in their own private space, but on the same lot like the family home. An ADU cannot be sold separately from the primary dwelling but can increase the value of the said property.

How Much Does It Cost to Build an Adu in San Diego?

The amount you will spend to build an ADU in San Diego is dependent on a variety of factors which are:

How many rooms do you want your ADU to have? A one-bedroom unit will cost less than a 3 bedroom ADU. In San Diego, the maximum size of an ADU is 1,200 square feet.

An ADU, just like a primary dwelling unit, requires certain permissions before you can embark on construction. These permits include Health and Sanitation, building, and inspection permits. Our San Diego ADU contractors will help you to process the approvals for these permits.

In San Diego County, you can build multiple ADUs on a single property, as long as they fulfill the requirements set aside by the local building council.

With these factors in mind, an ADU build in San Diego may cost anywhere from $100,000 to $400,000. With the help of a professional ADU architect like ours, you will work out a detailed budget that suits your needs and preferences.

ADU unit

How Many ADUs Are Permitted in San Diego?

There are various ADU rules that a homeowner looking to construct one of these modern home additions must follow. One of the most common questions that our clients ask is – how many ADUs they can build.

According to San Diego county ADU requirements, one can build up to two ADUs on an existing primary plot. This is dependent on the fact that you keep to the stipulations for the size of your granny flat.

How Small Can an ADU Be in San Diego?

The size of ADUs is regulated by county zoning and construction laws in San Diego. A regular ADU should not exceed 1,200 square feet in dimensions. The height of ADUs is also limited, and cannot be multi-story. An attached ADU should take up only 50% of the space that the primary home occupies.

If the granny flat is detached, it can take up 1200 square feet regardless of the size of the primary house. You can convert a garage into an ADU, something that many people have done with great success.

Advantages of Building an ADU in San Diego

Adding an ADU to your property has potential benefits including the following:

Pros of hiring an ADU contractor in San Diego

Building an ADU in San Diego is the type of project that must have professionals on board for success. There are many reasons why you should hire our ADU construction firm for your project. Here are a few reasons.

Let Us Help You Bring Your ADU in San Diego Dream Alive

Are you ready to start on your ADU project in San Diego? We are a licensed and professional ADU firm located in San Diego with years of experience backed by credible customer reviews. Our team of professionals has helped homeowners in San Diego County bring their ADU dream to life. We would like to add you to our growing list of clients.

Talk to us today about your ideas. We will help you navigate the unfamiliar territory of building codes and local zoning. Our team will answer all your questions and help you settle on the best design for your ADU. Call us today to book a site survey and initial consultation to get you started on your property upgrade.

Areas we serve in San Diego – ADU contractor near me

Some of the locations we are proud to serve in San Diego County include:


No matter where you are in SD County, our ADU services are available to you.

ADU front yard
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