About Constructum
Constructum is a full-service design and build firm based in Arizona, serving the Scottsdale, Paradise Valley, and Phoenix areas. With over 23 years of hands-on building experience, they manage the entire construction process from initial concept through to project completion. Their work spans custom homes, residential and commercial renovations, and pre-designed guesthouses — including detached ADUs and casitas.
As an ADU contractor and accessory dwelling unit builder, Constructum handles projects of varying scope and complexity. Whether a client comes with fully developed plans or needs guidance from the very beginning, the team is structured to take on either scenario. They coordinate directly with architects, engineers, designers, city departments, and subcontractors — so the client doesn't have to.
ADU and Guesthouse Construction
One of Constructum's primary offerings is the design and construction of detached guesthouses and ADUs. They offer a selection of pre-designed, pre-priced guesthouse plans that are ready to build, including:
- 1 Bed | 1 Bath | 560 sq ft
- 1 Bed | 1 Bath | 661 sq ft
- 2 Bed | 1 Bath | 995 sq ft
- 2 Bed | 2 Bath | 1,252 sq ft
These pre-designed options are intended to simplify the decision-making process while still allowing for a quality build. For those looking for something more tailored, Constructum also takes on fully custom detached ADU and casita projects built to the client's specific needs and property conditions.
Their experience as a granny flat builder and backyard cottage builder in the Phoenix metro area means they are familiar with local zoning requirements, permitting timelines, and the specific challenges that come with building on residential lots in this region.
Their Process
Constructum follows a structured process designed to reduce uncertainty and keep projects on track. It begins with an introductory call to understand the client's needs, followed by an on-site visit where the team reviews zoning requirements, existing plans, and property conditions before arriving. This preparation allows them to provide accurate estimates rather than rough guesses.
Once the site visit is complete, they develop a detailed budget grounded in recent project data and decades of field experience. Before construction begins, they finalize architectural plans, coordinate with engineering consultants, and collect firm bids from trade partners — moving the project from an estimated budget to a fixed, reliable cost.
Permitting is handled entirely by Constructum. They submit all documentation, respond to city comments promptly, and manage revisions as they come in. While permit timelines vary by municipality, their approach is to stay proactive so no time is lost on their end.
During construction, Constructum draws on long-standing relationships with trusted subcontractors built over more than two decades. These relationships mean their projects are often prioritized, which contributes to tighter timelines without compromising the quality of the work.
Transparency and communication are emphasized throughout every phase. Clients receive regular updates so they always know where the project stands and what comes next. Before any project begins, Constructum provides comprehensive budgets intended to give clients as clear a picture as possible of total costs — minimizing surprises down the line.
In addition to ADU and guesthouse construction, Constructum also takes on residential remodels, full custom home builds, and commercial renovation projects across the greater Phoenix area.
