ADU Cost: Detached, Attached, Garage, and Basement Options
Compare accessory dwelling unit and secondary-suite costs by physical form, independent living functions, sitework, utilities, approvals, and local terminology.
Cross-category index
ADU
Browse 3 guides connected by tag “ADU”. Use the category label on each result to keep the project scope clear.
In-Law Suite Cost: Addition, Conversion, or Full ADU?
Choose among a private suite, existing-space conversion, and full ADU by comparing independence, kitchen and entrance scope, accessibility, utilities, privacy, and approvals.
Septic & Onsite Wastewater
5 min read
Septic System Upgrade Cost for an Addition, Extra Bedroom, or ADU
Find out how a home addition, extra bedroom, suite, or ADU can change septic capacity, siting, permits, inspection, and project cost.