The answer can be complicated and it depends on the type and size of the ADU you’re building.
As you already know, there are three main types of ADUs:
- Attached ADUs
- Detached ADUS
- And Garage conversions
Not all these three types of ADUS are built the same. For this reason, their value is attached to how the construction is. With this in mind, let’s look at the different types of ADUS while ranking their value.
A detached ADU is also called a granny flat separated from the existing home. It’s more private and typically more valuable than other ADUs.
Think of it as secondary housing, and you can go as far as building a 1,000sqft house, which typically costs more, and you stand a chance of gaining about $470,000 value if the average cost of the addition is $470 per square footage.
This is an addition usually attached to your existing home. It’s less private compared to a detached one.
As much as an appraiser will calculate the value of an attached ADU based on its square footage, it is still less valuable than a detached unit.
Because with an attached unit, you’re only allowed to increase the size of your existing home by 50%.
So, in case your home is 1,00sqft, then the maximum you can go is 500sqft, which is a considerable increase but below the size of a detached unit.
Garage conversion ADU:
With this kind of ADU, you’re switching the use of an existing structure.
It’s less expensive compared to attached and detached units, and value-wise, unfortunately, it has less value because technically, you’re losing your garage.
The best way to get more value from a garage conversion is by turning it into a rental.
So, which one would you consider? Remember, your choice also depends on your lifestyle and budget.
Let Us Help you With your ADU Construction Services
Need to build an Accessory Dwelling Unit in Mountain View, CA, and the surrounding areas?
Talk to our experts at All Weather Construction. We’re familiar with all the different zoning rules, building codes, and other regulations to help you with your ADU construction services.