Find Contractors in Ontario, CA
Vetted general contractors and specialists serving Ontario. Get up to 3 competitive bids, with a follow-up call from our advisory team.
Ontario Contractor Cost Ranges (2026)
Typical project costs in Ontario, adjusted for the local market (0.85× LA County baseline). Ranges reflect labor, materials, permits, and contractor overhead — not furniture or owner-supplied items.
Contractor costs in Ontario run about 15% below the LA County baseline — shaped by logistics-corridor labor pool and stable suburban stock.
| Project Type | Low | Average | High |
|---|---|---|---|
| Kitchen Remodel | $30k | $56k | $102k |
| Bathroom Remodel | $13k | $26k | $47k |
| ADU Construction | $128k | $213k | $340k |
| Room Addition | $68k | $128k | $255k |
| Garage Conversion | $34k | $60k | $102k |
| Roof Replacement | $9k | $16k | $30k |
| Pool Construction | $47k | $73k | $128k |
| Pool Remodel | $10k | $22k | $43k |
| Deck & Patio | $7k | $16k | $34k |
| Solar Installation | $13k | $22k | $39k |
| HVAC Replacement | $7k | $12k | $22k |
| Window Replacement | $7k | $16k | $30k |
| Foundation Repair | $10k | $22k | $51k |
Estimates updated 2026. Final pricing depends on scope, finishes, site conditions, and permit complexity. Want a precise number? Request bids below.
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