🏡 Services

ADU & Casita Construction
Arizona's Fastest-Growing Build Category

Rental income, multigenerational living, or guest quarters — we've built dozens of ADUs across Maricopa County and know every city's permit process cold.

ADU Specialists

Arizona ADU Experts

Arizona Senate Bill 1168 significantly liberalized ADU rules statewide — making it easier than ever to add a second unit to your property. Echelon Valley has built ADUs in nearly every Phoenix-metro city, and we know every jurisdiction's permitting nuances cold.

We handle the entire process: site feasibility, design coordination, permitting, construction, and utility connections. Most detached ADUs in the Valley complete in 12–18 weeks from permit approval.

Get ADU Pricing AZ ADU Laws Guide

ADU casita build Phoenix Arizona backyard

ADU Options

Types of ADUs We Build

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Detached Casita

A fully independent unit in your backyard. Separate entrance, full kitchen, bedroom, bath. 400–800 sqft. Most popular for rental income or multigenerational use.

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Attached ADU

Connected to the main home via shared wall. Less expensive than detached, shares some utilities. Ideal for multigenerational living with privacy.

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Garage Conversion

Convert an existing attached or detached garage into a livable ADU. Often the most cost-effective option — structure already exists.

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Junior ADU (JADU)

Created within the existing footprint of the primary home. Lower cost, minimal permitting. Great starter option before committing to a detached build.

Investment Math

The ADU ROI in Phoenix

Phoenix rental rates remain among the highest in the Southwest. A 600 sqft casita renting at $1,400/month generates $16,800/year — often covering the full construction cost within 8–10 years, while permanently adding value to your primary property.

ADU Type	Build Cost Range	Est. Monthly Rent
400 sqft Studio Casita	$75K – $120K	$1,100 – $1,500
600 sqft 1BR Casita	$110K – $168K	$1,400 – $1,900
800 sqft 2BR Casita	$150K – $230K	$1,800 – $2,400
Garage Conversion	$45K – $90K	$900 – $1,400

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ADU & Casita ConstructionArizona's Fastest-Growing Build Category