What utilities does an ADU need?

Most ADUs need water, sewer, power, and sometimes gas. They also need heating, cooling, and hot water.

Can utility work raise the ADU price?

Yes. Long trench runs, sewer work, and electrical panel upgrades can raise the price.

The quote should say what utility work is included. It should also say what is unknown or excluded.

ADU Quotes

Utility work is easy to miss. But it can change your ADU cost in a big way.

An ADU is a small home. It needs water, sewer, power, and sometimes gas. It also needs hot water, heat, and cooling.

That means utility work should be clear in your quote.

Utility items to check

Trenching means digging lines from the main house to the ADU. A long trench can cost more.

Hard soil, tight access, trees, or concrete can also raise the price.

Some homes need a bigger panel before an ADU can be powered. This is often called a service upgrade.

Ask if the quote includes this. If not, ask for a likely range.

Ask where the new lines will go. Ask if the builder has checked the route.

Do not accept “we will figure it out later” without knowing what that could cost.

The ADU needs heat, cooling, and hot water. The quote should say what system is included.

Ask if it meets code. Ask if the price includes installation and inspection.

A clear utility plan is a good sign. It means the builder is thinking about the real job, not just the pretty picture.

What utilities does an ADU need?: Most ADUs need water, sewer, power, and sometimes gas. They also need heating, cooling, and hot water.
Can utility work raise the ADU price?: Yes. Long trench runs, sewer work, and electrical panel upgrades can raise the price.
Should utility work be in the quote?: The quote should say what utility work is included. It should also say what is unknown or excluded.

Send the utility line items from your quote. I can help you see what questions to ask next.