Home Addition Costs Across Canada
Typical project range
$70,349 – $117,712
Based on 358 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 |
|---|---|---|---|
| Multiplex Conversion 4 6 Units | $400,000 | $800,000 | 2 |
| Second Storey Addition | $237,500 | $432,500 | 4(2 prov) |
| Laneway House Construction | $316,000 | $406,000 | 5 |
| Bedroom Addition | $97,500 | $152,500 | 2(2 prov) |
| Single Storey Addition | $80,000 | $120,000 | 2 |
| Kitchen Bump Out | $57,500 | $110,000 | 2(2 prov) |
| Screened Porch Premium | $57,500 | $92,500 | 2(2 prov) |
| Kitchen Bump Out Addition | $59,000 | $90,000 | 2(2 prov) |
| Four Season Sunroom | $31,667 | $78,333 | 3(2 prov) |
| Screened Porch Addition | $29,000 | $77,000 | 2 |
| Shed Dormer Addition | $33,750 | $66,250 | 4(4 prov) |
| Hip Dormer Addition | $32,500 | $62,500 | 2(2 prov) |
| Screened Porch Mid Range | $35,000 | $57,500 | 2(2 prov) |
| Gable Dormer Addition | $28,750 | $57,500 | 4(4 prov) |
| Bump Out Addition | $26,667 | $53,333 | 3(2 prov) |
| Interior Finishing | $35,167 | $51,667 | 3 |
| Three Season Sunroom | $18,333 | $46,667 | 3(2 prov) |
| Architect Design Services | $19,500 | $43,750 | 4 |
| Mudroom Addition Basic | $22,500 | $35,000 | 2(2 prov) |
| Screened Porch Basic | $20,000 | $35,000 | 2(2 prov) |
| Bathroom Dormer Addition | $19,500 | $24,500 | 2(2 prov) |
| Bump Out Framing | $11,500 | $19,500 | 2 |
| Building Designer Services | $6,667 | $18,333 | 3 |
| Architectural Plans | $8,000 | $17,500 | 2(2 prov) |
| Second Story Structural Engineering | $5,000 | $13,500 | 2 |
| Architectural Design | $5,667 | $12,667 | 3(2 prov) |
| Laneway House Structural Engineering | $5,000 | $12,500 | 2 |
| Architectural Design Drawings | $6,000 | $11,500 | 2 |
| Architectural Drawings | $4,000 | $10,500 | 2 |
| Structural Engineering Design | $3,000 | $8,000 | 2(2 prov) |
| Structural Engineering | $2,500 | $6,143 | 7 |
| Geotechnical Investigation | $2,875 | $5,500 | 4 |
| Geotechnical Report | $2,625 | $5,500 | 4 |
| Structural Engineering Drawings | $2,000 | $4,250 | 2(2 prov) |
| Energy Code Compliance Assessment | $2,000 | $4,000 | 2 |
| Structural Engineer Assessment | $1,422 | $3,375 | 16(3 prov) |
| Structural Engineer Drawings | $1,150 | $3,000 | 2(2 prov) |
| Site Survey | $1,000 | $2,500 | 2(2 prov) |
| Arborist Report | $825 | $2,050 | 4 |
Per-Unit Costs
| Job Type | Low | High | Sources |
|---|---|---|---|
| Bump Out Per Sqft | $400/sq ft | $642/sq ft | 3(2 prov) |
| Laneway House Construction | $383/sq ft | $550/sq ft | 3 |
| Ground Floor Room Addition | $283/sq ft | $517/sq ft | 3(3 prov) |
| Single Storey Addition | $283/sq ft | $450/sq ft | 6(2 prov) |
| Addition Construction | $267/sq ft | $433/sq ft | 3(2 prov) |
| Room Addition | $175/sq ft | $400/sq ft | 2(2 prov) |
| Screened Porch Addition | $150/sq ft | $400/sq ft | 2 |
| Second Storey Addition | $236/sq ft | $395/sq ft | 10(4 prov) |
| 4 Season Sunroom Per Sqft | $175/sq ft | $300/sq ft | 2(2 prov) |
| Eyebrow Dormer | $128/sq ft | $180/sq ft | 2(2 prov) |
| Inset Dormer | $130/sq ft | $170/sq ft | 3(3 prov) |
| Hip Dormer | $125/sq ft | $155/sq ft | 2(2 prov) |
| Gable Dormer | $113/sq ft | $145/sq ft | 2(2 prov) |
| Porch Framing | $25/sq ft | $40/sq ft | 2 |
| Premium Screening Panels | $15/sq ft | $25/sq ft | 2 |
| Multiplex Construction | $200000/unit | $500000/unit | 2 |
By Province
Alberta$91,100 – $137,260
British Columbia$79,392 – $132,050
Ontario$54,705 – $94,750
New Brunswick$37,700 – $70,622
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