ADU Quotes

How to compare two ADU builder quotes

The lowest price is not always the best price. First, make sure both quotes include the same work.

Comparing ADU quotes can be hard. Each builder may use a different format.

Your job is to make the quotes easier to compare. Put the same items side by side.

Compare these items first

  • Design and permit work.
  • Site work and drainage.
  • Water, sewer, gas, and power.
  • Foundation and framing.
  • Roofing, siding, windows, and doors.
  • Plumbing, electrical, HVAC, and water heater.
  • Finish budgets and allowances.
  • Exclusions and change order rules.

Step 1: Make a simple table

Put Builder A in one column. Put Builder B in another column. Then list the main line items down the left side.

This makes missing items easy to see.

Step 2: Match the scope

Scope means the work included in the price. A quote with more scope may cost more at first.

But it may save you from surprise costs later.

Step 3: Check utility work

Utility work can be expensive. Make sure both quotes explain water, sewer, gas, and power.

Use this guide: ADU utility costs.

Step 4: Compare allowances

One quote may give a larger window or cabinet budget. Another may give a smaller one.

Do not treat those as equal. They are not equal.

Step 5: Read exclusions last

The exclusions section can tell you why one quote is cheaper.

If many items are excluded, ask what they may cost.

Step 6: Ask the same five questions

  1. What is included?
  2. What is not included?
  3. What is only a budget?
  4. What could change the price?
  5. How do change orders work?

Start with this page if you need the full list: ADU builder quote checklist.

Frequently asked questions

How do I compare two ADU quotes?
Compare the same items side by side. Look at scope, utilities, foundation, finishes, allowances, exclusions, fees, and change order rules.
Should I choose the lowest ADU quote?
Not without checking the scope. The lowest quote may be missing work that you will pay for later.
What should I ask each ADU builder?
Ask what is included, what is excluded, what is only an allowance, what could change, and what happens if the city asks for changes.

Have two ADU quotes?

Send the line items from both quotes. I can help you compare them side by side.

Send your ADU details