Design IdeasApril 20, 2025 · 7 min read
Detached vs. Attached ADU: Which Type Is Right for Your Property?
Detached cottage
Most privacy and flexibility, usually the highest cost because it needs its own foundation and utilities.
Garage conversion
Reuses an existing structure, often lowering cost — though insulation, windows and foundation may need upgrades.
Basement or attic suite
Often the most affordable route, but ceiling height, egress and light can be limiting.
Attached addition
Shares a wall with the house — good for multigenerational living while keeping separate entries.
