Modern Two-Story
1,150 sq ftDetached Build
- ADUs From $103,742
- Licensed, Bonded & Insured
- Warranty-Backed
- Design · Engineering · Permitting · HOA
- Financing Options Available
- Open Mon–Sat 7am–7pm
Maricopa · Pinal · Prescott Area, Arizona
400 SF ADU$103,742
600 SF ADU$128,369
800 SF ADU$179,862
Starting construction prices — not guaranteed all-in project totals.
Custom ADUs, Built from Permit to Keys.
A licensed Arizona ADU builder — one team handles design, engineering, permitting and construction of your Accessory Dwelling Unit (ADU). You don't need to be ready to build to talk to us.
“We don't advertise the lowest number. We work to give you the right number.”
Or call 602-858-2907Free Quote · No Obligation
Get a Free ADU Quote
- We call within 1 business day
- Free, no-obligation site visit
- The right number — not the lowest number
- Just researching? Six months out? Still worth a call.
Got it — thank you.
A team member will reach out within one business day to discuss your project.
Or call now: 602-858-2907Portfolio
Custom ADU Builds Across Arizona
Casita Builds by Maricopa Casitas — every Casita / ADU is designed around a specific lot and a specific homeowner.
View Our Casita Build Concepts — click any photo to view full size.
Straight Pricing
"We don't advertise the lowest number. We work to give you the right number."
Starting construction prices shown here. For planning purposes only, site and utility work often runs $15,000–$30,000+ depending on your lot, and design, engineering and permitting start around $6,000+. See the full breakdown →
400 sq ft $103,742
600 sq ft $128,369
800 sq ft $179,862
Why Homeowners Build
Built for How You Actually Live.
Every ADU we build starts with a reason. Here are the most common ones — and we design for all of them.
Most Popular
Rental Income
Generate $1,200–$2,500/month in passive income. Many clients' rental revenue covers their entire financing payment — and then some.
Multi-Generational Living
Keep aging parents or adult children close — with full privacy. A separate entrance, kitchen, and bathroom makes it a true home.
Guest House
A permanent guest suite that doubles as a short-term rental when not in use. Fully self-contained — your guests won't want to leave.
Home Office / Studio
A dedicated workspace, art studio, or fitness studio — separated from the main house, designed to the way you work.
Not sure which fits your situation? We'll help you figure it out during the free site evaluation.
Featured Builds
Recent Maricopa
County Projects.
Every ADU we build is custom — sized for your lot, designed for your lifestyle, finished to your taste.
Contemporary Detached
950 sq ftCustom Two-Story
Open-Concept Studio
650 sq ftCustom Kitchen + Living
How It Works
The Maricopa Casitas Process.
From the first conversation to the day we hand over the keys — every step is transparent, staged, and managed by our team.
- 01
Initial Consultation
We start by understanding your goals, how you plan to use the space, and the approximate budget you have in mind. No pressure, no obligation.
- 02
Site Evaluation
We review your utilities, access, setbacks and existing building conditions to understand what your specific property will support.
- 03
Preliminary Project Budget
We establish a realistic preliminary project range — including the site and utility work your lot actually needs, not just a headline number.
- 04
Contract of Intent
You move from initial planning into active project development, with a clear scope of what happens next.
- 05
Design & Preconstruction
Architectural design, engineering, HVAC calculations and the required documentation for your project get underway.
- 06
HOA & Permitting
We prepare and manage the submittals, navigate applicable HOA approvals, and handle municipal permitting requirements.
- 07
Construction Agreement & Build
We finalize the project scope and pricing, then begin construction with a defined schedule and staged accountability.
- 08
Warranty
Your completed ADU is warranty-backed — we stand behind the work after the keys are handed over.
$103,742 starting
400 sq ft ADU — construction 3–6 mo Typical build timeline
400–800+ Sq ft — design to your needs
Free Consultation — no pressure, no obligation
Why Maricopa Casitas
All-In-One.
Accountable Every Step.
- All-in-One
Design, permits, and construction under one roof. No coordinating multiple contractors — we own the entire process.
- Transparent Pricing
We don't advertise the lowest number. We work to give you the right number — a realistic range built around your actual lot, before you commit to anything.
- Permit Experts
We work in these jurisdictions every week and verify the planning, zoning, setback and permitting rules that apply to your specific property. We handle the paperwork — not you.
- Custom Design
Modern or traditional — we design ADUs that match your property, your style, and your HOA requirements.
- HOA Navigation
We help you prepare and navigate HOA submittals and approvals. We can't guarantee an HOA's decision — but you won't be figuring it out alone.
- Licensed & Backed
Licensed, bonded and insured — with warranty-backed work, plus design, engineering and permitting assistance handled in-house.
- No Pressure
You don't need to be ready to sign a construction contract just to talk to us. Whether you're simply researching possibilities, six months away, a year away, or just trying to understand budget, feasibility and process — that's a conversation worth having, with no obligation attached.
Investment
What Does an ADU Cost?
"We don't advertise the lowest number. We work to give you the right number."
Here's where our ADU builds typically start. These are starting construction prices — not guaranteed all-in project totals. Your final number depends on your lot, your selections, and what your site actually requires.
400 sq ft ADU $103,742 starting construction price
600 sq ft ADU $128,369 starting construction price
800 sq ft ADU $179,862 starting construction price
How ADU Pricing Actually Works
ADU pricing isn't linear by square footage. A smaller ADU still needs most of the same major components as a larger one — foundation, framing, roofing, electrical, HVAC, windows, doors, a kitchen and a bathroom. Those costs don't shrink just because the footprint does.
That's why smaller ADUs can carry a higher cost per square foot. On certain cost-efficient configurations, roughly $225 per square foot or less may be achievable — but that is not a guaranteed price. Smaller footprints, kitchens, bathrooms, significant plumbing, and significant site work can push the cost per square foot higher.
Every property is different. We give you a realistic preliminary range after we've actually looked at your lot — not before.
What the Starting Price Covers
Starting prices represent the turnkey construction portion of your ADU — the building itself, built to spec and finished.
Not included
- Site preparation & utility work
- Design
- Engineering
- HVAC calculations
- Permitting
- Appliances (unless written into your scope)
- Other required preconstruction expenses
Design, permitting and related preconstruction expenses typically run $6,000+, depending on your city and project requirements.
Site & Utility Conditions
No two lots are the same. What your property already has — and what it still needs — moves the number more than almost anything else.
Sewer or septicWaterElectrical capacityUtility trenchingAccessGrading & drainageWalls or fencingSetbacksBuilding envelopePools or existing structuresMunicipal requirementsHOA requirements
For early planning only, site and utility work often falls somewhere around $15,000–$30,000+ depending on the property. That is a planning range to help you think about budget — not an allowance, not a quote, and not a guarantee. Your actual number comes from what we find on your lot.
About Appliances
Appliances are normally not included unless they're specifically written into your project scope. If appliances matter to you, tell us early and we'll put it in writing.
Return on Investment
A well-built ADU in Maricopa County typically generates $1,200–$2,500/month in rental income and adds meaningful resale value to your property.
Funding Options Available
Paying for it doesn't have to be all at once.
Maricopa Casitas works with multiple lending partners. Qualified homeowners may have financing options available for their ADU project — and we're happy to help you explore what's out there before you commit to anything.
Explore Financing Options Opens our lending partner's site in a new tab
- We work with multiple lending partners, not a single lender
- Qualified homeowners may have financing options available
- We can help you explore the options that fit your project
Financing is subject to lender approval and individual qualification. We're builders, not lenders — we'll point you in the right direction and let the lending partner take it from there.
Planned for 2027 Coming 2027 — Sneak Peek
An ADU Design Studio you can actually walk through.
Maricopa Casitas plans to open an ADU Design Studio and showroom in 2027. The plan is to make the part homeowners find hardest — picturing the space — something you can stand inside before a shovel ever hits dirt.
What we're planning
- Experience your floor plan at full scale using an overhead projection system
- Walk through the proposed space before you build it
- Meet the team building it
- Explore popular selections and finishes in person
Planned for 2027 — not yet open. In the meantime, we'll walk your lot with you and talk through the same decisions in person.
No Two The Same
Every ADU we build is shaped by the lot, the homeowner, and the life it's meant to support.
Curious what your ADU would cost?
Get a realistic, itemized range from a licensed Arizona ADU builder — no cost, no commitment.
FAQ
Questions We Hear Every Day
Service Area
We Build Across
Maricopa, Pinal & Prescott.
A licensed Arizona ADU contractor serving Maricopa County, Pinal County, and the Prescott area — from Phoenix ADU projects in the Valley to builds further out.
Local ADU requirements vary by city, town, and county. Planning, zoning, permitting, setbacks, and HOA requirements should be verified for each property — and we do that verification with you before anything is promised.
Phoenix Scottsdale Chandler Gilbert Mesa Tempe Glendale Peoria Goodyear Surprise Queen Creek Maricopa Fountain Hills Litchfield Park Casa Grande Apache Junction Florence Coolidge Prescott Prescott Valley Chino Valley
Progress Photos
Our Work in Progress.
A look at the people and work behind a casita build — from a couple visiting their casita under construction to the trenching, utility runs and sewer connections that come before the finishing touches.
Get Started
Your ADU Starts With a Conversation.
Talk to us wherever you are in the process — researching possibilities, six months out, a year out, or ready to build. You don't need to be ready to sign anything to get answers on budget, feasibility and process. We'll walk your property, explain your options in plain language, and give you a realistic number. No cost, no pressure, no obligation.
Open 7 AM – 7 PM, Monday through Saturday.
Licensed, Bonded & Insured · Warranty-Backed · Arizona ADU Contractor · Maricopa · Pinal · Prescott