Proteus Homes: Custom Home and ADU Builder
Proteus Homes is a design-build company specializing in custom homes and accessory dwelling units (ADUs). Drawing on over 30 years of combined experience in custom home construction and off-site fabrication throughout the Southwest United States, they have developed a building system aimed at reducing the common frustrations associated with traditional construction.
Their approach combines custom home quality with panelized construction methods. By fabricating structural panels off-site while simultaneously preparing the job site and processing permits, Proteus Homes is able to significantly reduce overall project timelines. According to the company, the structure can be assembled in a single day, pass inspection within one week, and be move-in ready in under three months — roughly one-third less time than traditional on-site construction.
ADU Construction Services
Proteus Homes offers a range of ADU contractor services, covering the full process from design and permitting through to final build. As an accessory dwelling unit builder, they handle site feasibility, design and engineering, city corrections during permitting, site preparation, foundation work, off-site fabrication, transportation, on-site assembly, and a standard finish package that includes interior and exterior finishes, appliances, and plumbing and electrical fixtures.
Their ADU services are suitable for a variety of uses, including rental income generation, multigenerational living, and adding usable square footage for family or guests. They also build JADUs (Junior Accessory Dwelling Units) — units of no more than 500 square feet located within the main residence.
For those looking to add a granny flat, backyard cottage, in-law suite, or Casita, Proteus Homes offers both pre-designed floor plans and fully customized options. They can also build above an existing garage, making them a viable option as a garage conversion contractor in applicable situations.
Their standard floor plan options include:
- Studio / Home Office – 336 sq ft: $209,544 – $244,265
- One Bedroom Linear – 497 sq ft: $249,455 – $288,941
- One Bedroom Offset – 497 sq ft: $252,638 – $288,123
- Two Bedroom – 749 sq ft: $327,186 – $375,258
- Three Bedroom – 1,200 sq ft: $442,614 – $501,641
- One Bedroom Above Garage – 441 sq ft: $293,337 – $328,822
It's worth noting that local permitting fees and hardscape or softscape landscaping are not included in these prices.
The Proteus Building Process
The Proteus Homes process follows five main steps: site feasibility, design and permitting, off-site fabrication and site preparation, crane day assembly, and the finish package. The entire process takes approximately six months from start to finish.
A key feature of their workflow is the use of proprietary web-enabled tools that allow clients to track job site calendars, view 3D renderings of their home in real time, and stay informed throughout the project. Proteus Homes positions itself as a single point of contact from the initial design phase through to move-in.
They offer a free in-person site feasibility visit, during which a team member will assess the property and discuss factors such as size, location options, setbacks, drainage, and budget. This is available at no cost and is intended to help property owners understand what is realistically possible on their specific lot.
Adding an ADU to a property can increase its value, create rental income, and provide flexible living arrangements for extended family — practical considerations that make working with an experienced detached ADU builder like Proteus Homes a relevant option for many homeowners.
