ADU Cost: Detached, Attached, Garage, and Basement Options
Compare ADU costs by physical form, then separate conditional support, Canadian tax routes, financing, and legalization work for an existing unpermitted unit.
Cross-category index
ADU
Browse 6 guides connected by tag “ADU”. Use the category label on each result to keep the project scope clear.
Development Charges and Impact Fees: Costs Beyond the Building Permit
Find out when a residential project may trigger development charges, impact fees, or system development charges, how credits and relief work, and what to confirm before budgeting.
GST/HST Rebates for Major Canadian Renovations: Which Route Fits?
Compare Canadian GST/HST routes for major renovations by project, use, and timing, including a conditional first-time-homebuyer route and filing records.
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.
Unpermitted ADU or Secondary Suite: What Legalization Can Cost
Budget assessment, corrections, fees, temporary arrangements, and closeout when an existing ADU or secondary suite has unresolved approvals.