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Missed deadlines, cost overruns, and subcontractors you’ve never met showing up unannounced — that’s the Phoenix contractor horror story too many homeowners know. Fortress General Contracting was built to be the exception.
We are a family-owned Arizona GC with 90+ completed projects and $1.3 billion in Arizona construction assets managed. Every ADU construction project in Phoenix we take on is fully permitted, staffed by vetted licensed tradesmen, and managed by a single dedicated project manager who answers the phone.
We offer pre-rendered, customizable ADU floor plans starting at $115,000 — or work with our team from scratch to design the exact ADU your Phoenix property calls for.
Each plan is fully customizable, or work with our team to design something entirely your own — choose your finishes, exterior style, and layout. Every ADU construction project in Phoenix is fully permitted and code-compliant for Maricopa County. Click “View Floor Plan” to explore the full layout.
Fortress Residential is a family-owned Phoenix-area contractor built on doing right by every homeowner we serve. With 35+ years of builder experience and over $1.3 billion in Arizona construction assets delivered, our track record reflects a simple commitment: we do what we say we’ll do, and we stand behind every ADU construction project in Phoenix that carries the Fortress GCI name.
Here’s how it works:
01 — Free Consultation. We visit your Phoenix-area property, assess your lot, and walk through design options that fit your space and budget — no pressure, no obligation.
02 — Planning & Permits. Our team manages all drawings, City of Phoenix submittals, inspections, and permit checkpoints. You never have to set foot in a city office.
03 — Expert Construction. Our licensed Arizona trades build your ADU with quality materials engineered for the desert climate. We coordinate every phase.
04 — Final Walkthrough. You inspect every detail before we hand over the keys. We don’t consider the job done until you’re completely satisfied.
When you hire Fortress Residential, you’re working with a Phoenix construction team that knows Arizona codes, Maricopa County permitting, and the unique demands of desert building — and a team that will give you straight answers about your project, your timeline, and your budget, even when it isn’t the easy thing to say.
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Do I need a large lot for ADU construction in Phoenix?
The City of Phoenix allows ADUs on lots 6,000 sq ft and larger. On a 7–8,000 sq ft lot, you’ll typically have comfortable room for a detached unit. We’ll assess your property during a free consultation.
How long does ADU construction in Phoenix take?
Typically 4–7 months from signed contract to certificate of occupancy, including permitting. Phoenix is generally efficient to permit through — and we know the city’s process inside and out.
Does Fortress handle all the permits for my Phoenix ADU?
Completely. We manage all drawings, City of Phoenix submittals, every inspection, and the final certificate of occupancy. You never deal with city offices.
Can I rent out my ADU in Phoenix?
Yes — Phoenix permits ADU rentals both short and long term in most residential zones. Many of our clients use their ADU to offset their mortgage or generate steady rental income. We’ll walk you through the applicable rules for your specific address.
What’s included in Fortress’s starting price for ADU construction in Phoenix?
Standard finishes, foundation, framing, roofing, electrical, plumbing, HVAC, and full interior finish-out. Any upgrades, site prep costs, or utility connection fees are scoped and quoted transparently before you sign anything.
Can I customize the floor plan to match my Phoenix home?
Absolutely. Our three plans are starting points, not constraints. We adjust layouts, add covered patios, swap exterior finishes, and tailor the architecture to complement your existing home and neighborhood.
Ready to find out if your Phoenix lot qualifies for an ADU? Want a real number — not a rough estimate? Contact Fortress General Contracting today for a free, no-obligation consultation on ADU construction in Phoenix.
We serve all of Maricopa County — Phoenix, Scottsdale, Tempe, Chandler, Mesa, Gilbert, Glendale, Peoria, Surprise, and surrounding cities. Licensed. Bonded. Insured. AZ ROC 250565.
