What Is an Accessory Dwelling Unit?
An accessory dwelling unit, commonly referred to as an ADU, goes by many names — secondary dwelling, laneway house, in-law suite, or casita. Across the United States, "ADU" is the most widely used term for this type of housing. ADUs are self-contained living spaces that are either attached or detached from the primary residence, located on the same property.
Common ADU types include:
- Detached new home
- Attached addition
- Basement apartment
- Attic apartment
- Over-garage apartment
- Garage conversion
Many new laws and regulations have been introduced across the United States to expand housing opportunities and reduce restrictions on building ADUs. Requirements can vary from city to city, so checking with your local jurisdiction before starting is an important first step.
Benefits of Building an ADU
There are several practical reasons homeowners consider adding an ADU to their property:
- Long-term investment potential
- Makes use of unused backyard space
- Multiple financing options may be available
- Potential tax benefits
- Can increase overall property value
- Provides an additional income stream
- Adds livable space for family or guests
It's worth noting the difference between a tiny house and an ADU. While they can overlap, they are not the same thing. ADUs are permanent structures on an existing property, require full utilities, and are considered real estate. Tiny houses can be mobile, require no utilities, and typically range from 100–400 square feet. ADUs generally range from 300–1,200 square feet and are always permanently situated on the same lot as the primary home.
The G.J. Gardner Homes Sacramento ADU Process
G.J. Gardner Homes Sacramento works as an ADU contractor and accessory dwelling unit builder in the Sacramento area, guiding clients through a structured seven-step process from initial consultation to key handover.
- Consultation — A discussion about the proposed ADU location, feasibility, and intended purpose.
- Preliminary Design — The team assesses the lot dimensions, topography, utility locations, and landscaping to select a suitable ADU design that fits within required setbacks.
- Plan Approval — A contract is presented, the final plan is reviewed, and the proposal is submitted to the local municipality for approval.
- Site Preparation — Utilities are connected and the site is prepared for foundation work.
- Exterior Finish — Exterior materials and colors are selected to complement the existing home.
- Interior Finish — Selected interior inclusions are installed, and clients are invited to inspect the work before finishing touches are completed.
- Handover — Upon completion, a Certificate of Occupancy is issued, a walk-through is scheduled, and the keys are handed over.
G.J. Gardner Homes Sacramento has been building and renovating homes and ADUs for over 30 years. Their team includes designers, architects, licensed builders, skilled contractors, and project managers. All ADUs are built to meet California building standards using quality materials sourced from established suppliers. A team member is present throughout the entire process — from the initial on-site evaluation through to the final handover.
