Secondary Suite Costs Across Canada
Typical project range
$66,785 – $114,285
Based on 457 data points across 4 provinces
Detailed Cost Breakdown
Specific costs by job type, extracted from industry sources across Canada.
Total Project Costs
| Job Type | Low | High | Sources |
|---|---|---|---|
| Garden Suite Build | $230,000 | $400,000 | 2(2 prov) |
| Laneway House Construction | $197,143 | $374,286 | 7 |
| Detached Garden Suite | $215,000 | $350,000 | 2(2 prov) |
| Multiplex Conversion 2 3 Units | $150,000 | $350,000 | 2 |
| Garden Suite Mid Range | $250,000 | $315,000 | 2(2 prov) |
| Garden Suite Construction | $173,750 | $310,000 | 8(3 prov) |
| Garden Suite Basic | $190,000 | $250,000 | 2(2 prov) |
| Secondary Suite Construction | $80,000 | $200,000 | 2 |
| Above Garage Suite Basic Conversion | $115,000 | $185,000 | 2(2 prov) |
| Complete Secondary Suite Conversion | $70,000 | $170,000 | 2 |
| Secondary Suite With Underpinning | $100,000 | $165,000 | 2 |
| Basement Apartment | $80,000 | $150,000 | 2 |
| Secondary Suite Conversion | $66,667 | $146,667 | 3(2 prov) |
| Basement Apartment Conversion | $51,667 | $121,667 | 3(2 prov) |
| New Suite Construction | $80,000 | $120,000 | 2 |
| Basement Secondary Suite Construction | $60,000 | $120,000 | 2 |
| Legal Basement Suite | $60,000 | $120,000 | 2(2 prov) |
| Basement Secondary Suite | $64,000 | $119,750 | 20(3 prov) |
| Basement Underpinning | $48,000 | $114,000 | 5(3 prov) |
| Basement Secondary Suite Conversion | $55,000 | $111,944 | 18(4 prov) |
| Legal Basement Apartment Conversion | $50,000 | $105,000 | 2 |
| Basement Suite Conversion | $53,529 | $104,706 | 17(3 prov) |
| Basement Secondary Suite Full | $58,333 | $100,000 | 3(2 prov) |
| Basement Secondary Suite Complete | $46,667 | $91,667 | 3(3 prov) |
| Garage Conversion Secondary Suite | $45,000 | $83,333 | 3(2 prov) |
| Basement Inlaw Suite | $50,000 | $80,000 | 2 |
| Legal Basement Suite Complete | $42,500 | $80,000 | 2(2 prov) |
| Secondary Suite Renovation | $40,000 | $80,000 | 2 |
| Basement Suite Development | $45,000 | $72,500 | 2 |
| Basement Suite Construction | $37,500 | $67,500 | 2(2 prov) |
| Secondary Suite Kitchen | $27,500 | $57,500 | 2 |
| Foundation Underpinning Ceiling Height | $15,000 | $40,000 | 2 |
| Illegal Suite Legalization | $15,000 | $40,000 | 2 |
| Site Preparation | $15,000 | $35,000 | 2 |
| Basement Kitchen Complete | $15,000 | $27,500 | 2 |
| Suite Kitchen Install | $10,750 | $25,750 | 4(2 prov) |
| Separate Entrance Install | $8,333 | $25,000 | 3(2 prov) |
| Basement Suite Kitchen Bathroom Finishes | $9,000 | $20,000 | 2(2 prov) |
| Exterior Entrance Construction | $6,000 | $15,667 | 3(2 prov) |
| Water Sewer Connection | $8,000 | $15,000 | 2 |
| Sewer Separation | $5,000 | $15,000 | 2 |
| Asbestos Abatement | $5,000 | $15,000 | 2 |
| Basement Kitchenette Basic | $8,000 | $14,500 | 2 |
| Fire Separation Upgrade | $5,250 | $14,250 | 4(3 prov) |
| Fire Separation | $5,667 | $14,000 | 3(3 prov) |
| Secondary Suite Entrance | $4,750 | $13,750 | 4(3 prov) |
| Separate Entrance | $4,750 | $11,500 | 4(3 prov) |
| Fire Separation Basement Suite | $4,000 | $11,500 | 4(2 prov) |
| Fire Separation Assembly | $5,200 | $11,400 | 5(3 prov) |
| Basement Suite Electrical Complete | $4,750 | $10,500 | 2 |
| Fire Separation Drywall | $4,667 | $10,333 | 3(2 prov) |
| Secondary Suite Separate Entrance | $4,667 | $10,333 | 3(3 prov) |
| Basement Suite Ventilation System | $3,000 | $10,000 | 2 |
| Interconnected Smoke Alarms | $4,750 | $9,000 | 2 |
| Basement Suite Electrical | $4,000 | $9,000 | 2 |
| Fire Rated Separation | $3,600 | $8,400 | 5(3 prov) |
| Architectural Drawings | $3,400 | $8,400 | 5(2 prov) |
| Fire Separation Install | $3,000 | $8,000 | 2(2 prov) |
| Basement Waterproofing | $3,000 | $8,000 | 2 |
| Mini Split Hvac Install | $3,750 | $7,000 | 2(2 prov) |
| Egress Window Install | $3,000 | $7,000 | 2(2 prov) |
| Secondary Suite Drawings | $3,000 | $5,500 | 2(2 prov) |
| Structural Engineering | $2,167 | $4,000 | 3 |
| Gas Service Separation | $1,500 | $3,500 | 2 |
| Structural Engineer Assessment | $1,200 | $2,600 | 5(4 prov) |
| Water Sub Meter Install | $800 | $1,500 | 2 |
Per-Unit Costs
| Job Type | Low | High | Sources |
|---|---|---|---|
| Laneway House Construction | $250/sq ft | $450/sq ft | 2 |
| Egress Window Install | $2478/unit | $5944/unit | 18(4 prov) |
| Egress Window | $2250/unit | $5500/unit | 2(2 prov) |
| Fire Damper Install | $175/unit | $450/unit | 2(2 prov) |
By Province
New Brunswick$79,353 – $121,667
British Columbia$73,159 – $123,802
Ontario$67,547 – $119,770
Alberta$41,601 – $75,858
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