Sometimes you don’t need more house, you just need more space to live.

This Phoenix, AZ project added a 550 square foot detached structure designed for work, downtime, and everything in between. With a game room, office, bathroom, and laundry, the space gives the homeowners flexibility without disrupting the main home. It’s a clean, functional addition that expands how the property can be used every day.

Video Walk Through

Project Overview

  • Project Type: ADU/Guest House
  • Size: 550 sq. ft
  • Location: Glendale, AZ
  • Use: Backyard ADU guest house
  • Connection: Backyard stand alone structure
  • Year Built: 2021

Cost Breakdown

$0
Approximate Total Project Cost
$0
Approximate Cost Per Square Feet

What This Cost Included

This project cost included the full scope of design coordination, engineering, and permitting required for an attached casita addition in Glendale, Arizona.

Construction costs covered all major phases of the build, including demolition, foundation work, framing, roofing, exterior stucco, insulation, drywall, and finish carpentry to create a complete and livable space.

Mechanical, plumbing, and electrical systems were installed in both rough-in and trim-out phases to support a fully functional private bedroom and bathroom guest suite.

Interior finishes included flooring, countertops, cabinetry, doors, painting, and final trim details to complete the space.

Project management, general conditions, overhead, and contractor profit were included to coordinate the work, manage scheduling, and deliver the project from start to finish.

Description Final Cost Price per sq. ft.
Concrete $18,896.67 $34.36
Rough Carpentry $19,879.00 $36.18
Roofing $1,560.75 $2.84
Mechanical-Rough In $5,400.00 $9.82
Plumbing – Rough In $12,072.13 $21.95
Electrical-Rough In $5,951.13 $10.82
Insulation $1,342.84 $2.44
Stucco/Siding $4,200.00 $7.64
Drywall $3,007.25 $5.47
Doors, Frames, Hardware (Installed) $1,963.49 $3.57
Painting $1,700.00 $3.09
Finish Carpentry & Cabiets $8,755.63 $15.92
Countertops $2,799.00 $5.09
Flooring $3,052.13 $5.55
Kitchen Appliances $5,757.71 $10.47
Temporary Toilet $838.23 $1.52
Dumpsters $2,347.91 $4.27
Equipment Rentals $7,760.00 $14.11
Engineering and Professional Services $4,811.46 $8.75
Subtotal $112,113.33  
Overhead Profit (18%) $20,180.40  
Grand Total $132,293.73 550 sq. ft
Cost per sq. ft.   $240.53 

Costs shown reflect actual construction costs for this project at the time it was built. Pricing varies based on scope, finishes, site conditions, and market factors.

Plans

Gallery