Modern Arizona ADU at twilight
Signature Builds

Modern Living, Simplified.

Pre-designed residential products from 3C Contracting — turnkey, fully customizable, and focused on ADU construction across Arizona. Four floor plans, modern finishes, one accountable builder.

The collection

Four floor plans, endlessly customizable

Every Signature Build starts from a proven plan, so pricing and schedule are known up front — then you make it yours.

The Mesquite ADU floor plan exterior

The Mesquite

600 sq ft

1 bed · 1 bath

Our most popular plan. An efficient one-bedroom casita with an open great room, full kitchen, and a covered entry — ideal for family, guests, or rental income.

  • Open great room
  • Full kitchen with island
  • Walk-in shower
  • Standing-seam metal roof
The Saguaro ADU floor plan exterior

The Saguaro

400 sq ft

Studio · 1 bath

A compact studio designed for tight lots and fast permitting. Warm wood accents, a flat modern roofline, and smart storage throughout.

  • Flat modern roofline
  • Wood accent siding
  • Kitchenette
  • Built-in storage wall
The Ocotillo ADU floor plan exterior

The Ocotillo

800 sq ft

2 bed · 1 bath

A true two-bedroom guest house with a covered patio and desert-forward exterior. Built for long-term living or multi-generational households.

  • Two bedrooms
  • Covered patio
  • Full-size laundry
  • Charcoal stucco exterior
The Agave ADU floor plan exterior

The Agave

1,000 sq ft

2 bed · 2 bath

Our flagship plan. Butterfly roofline, floor-to-ceiling glass, and a designer finish package that lives like a custom home at a fraction of the timeline.

  • Butterfly roofline
  • Floor-to-ceiling glass
  • Dual suites
  • Designer finish package

Turnkey from plan to keys

01

Pick your plan

Choose one of four floor plans sized to your lot and budget.

02

Customize finishes

Select cabinetry, counters, flooring, and exterior colors from curated modern packages.

03

We permit & build

We handle plans, permits, utilities, and construction with a fixed scope.

04

Turnkey handoff

Move in, host, or rent — your ADU is delivered finished and ready.

Ready to build your ADU?

Tell us about your lot and we'll recommend the right Signature Build plan, with pricing and timeline.