Real Estate

Detached ADU Costs

A detached ADU is usually the most expensive option when it comes to developing an ADU. However, they are also the type that offers you the most flexibility with design and privacy for tenants. Therefore, people usually conclude that the detached ADU costs are worth the benefits. How much does it cost to develop a detached ADU though?

What Impacts Costs

A number of aspects impact your overall ADU cost. Things like your design tastes, how big you want to build your unit, and who you hire to do the job all play a role in how much it is going to cost you. That is why your detached ADU might cost significantly more or less than your neighbors. If you hire an ADU professional who stays within budget and gets your permits approved the first time around, you are likely to save yourself a lot more money than someone who works with a team unfamiliar with ADU development.

General ADU Costs

All ADUs have the same 4 main cost categories.

  •  Design and planning
  •  City fees
  •  Construction labor and material
  •  Finishing materials

 You can control how much you spend on all the categories except city fees. City fees are fixed costs you have to spend no matter what size your unit is.

 You can save money on design and planning by choosing premade floor plans or having simple ones. For construction labor and material, you can use discounted materials and work with affordable contractors. Finally, for finishing materials, you can opt not to use expensive options like tiling and instead stick with more affordable flooring and cabinetry.

Detached ADU Costs

A new 499-square-foot construction detached ADU is going to cost you around: $161,700 – $201,125

  •  Design and planning: $8,000-$9,000
  •  City fees: $4,000-$5,000
  •  Construction labor and material: $124,750 – $149,700
  •  Finish materials: $24,950 – $37,425

 If you are looking to build a bigger unit, it will cost you around $300,000 to $400,000. Again, these costs are relative to your unique situation. If you have expensive design tastes, you will fall on the higher end of this range.

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Rizwan Malik

Hi, I'm Rizwan Malik. I'm an admin of, I'm providing a platform for the bloggers to share their ideas about technology, politics, lifestyle, and more to enhance their writing skills. My goal is to provide the best platform for my readers and visitors which could entertain them and where they can find their desired stuff.

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