Free tools

Run the numbers
before you talk to anyone.

Every Avorino tool in one place: price a build, model the rent, size the loan, check your city’s permit reality.

The toolbox

Six ways to find your number.

Four calculators that price a build, model the rent and size the loan, and two references that tell you what your city will actually ask for.

Calculator01 / 06

ADU Cost Calculator

$85K – $440K+All ADU types · typical OC range

Get an instant, detailed cost breakdown based on your property location, ADU size, and finish level. Powered by real Orange County market data.

Calculate Your Cost

Calculator02 / 06

ADU ROI Calculator

6.4 yrsPayback · 800 sqft detached · Irvine

See your projected rental income, property value increase, and payback timeline. Make confident investment decisions with real numbers.

See Your ROI

Calculator03 / 06

Garage Conversion Cost Calculator

$85K – $170K+Turnkey · permitted conversion

Price a garage conversion on your own garage: square footage, finish level, and what the permit and utility work really adds.

Price My Conversion

Calculator04 / 06

ADU Loan Calculator

4 routesHELOC · cash-out · construction · renovation

Work out the monthly payment, total interest, and what an ADU build costs to finance across the terms lenders actually offer.

Run The Numbers

Reference05 / 06

OC ADU Permit Index

37OC cities & communities covered

Permit reality for every Orange County city and community: who reviews, what they ask for, and the local quirks that set the calendar.

Look Up Your City

Reference06 / 06

ADU Plan Samples

387 – 830 sq ftPlans we build from

Real floor plans we build from, with square footage and layout, and a per-plan price on request.

Browse The Plans

Where the numbers come from

Priced against builds like these.

The calculators are calibrated on finished Avorino projects across Orange County. Tap any project for the full set.

When the number looks right

Put a real bid behind the estimate.

The calculators price the build; we build it. Tell us what you're planning and we'll turn your numbers into a scoped, licensed bid.

7+YearsOrange County experience
B-#1107538LicenseCalifornia General-B
37OC Cities + CommunitiesCoverage across all of Orange County
4.8★RatingYelp

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Run the numbersbefore you talk to anyone.