Onyx Building GroupGeneral contractor in Welland, ON
Onyx Building Group is a general contractor at 1789 Merrittville Hwy, Welland, ON L3B 5N5. Open Monday to Friday.
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Key facts
| Address | 1789 Merrittville Hwy, Welland, ON L3B 5N5Get directions |
|---|---|
| Phone | (905) 324-1879 |
| Website | onyxbuildinggroup.com |
| Hours | Monday to Friday: 7 AM – 6 PM |
Trades
Each trade shows the evidence we matched it on.
- General Contractingmain tradeGoogle main category
Service area
Serves Welland and 5 towns within 40 km: Thorold, St. Catharines, Niagara Falls, Port Colborne and Fort Erie.
Based in Welland, ONView on map
Opening hours
| Day | Hours |
|---|---|
| Monday | 7 AM – 6 PM |
| Tuesday | 7 AM – 6 PM |
| Wednesday | 7 AM – 6 PM |
| Thursday | 7 AM – 6 PM |
| Friday | 7 AM – 6 PM |
| Saturday | Closed |
| Sunday | Closed |
- Open evenings — no
- Open Saturdays — no
- Open Sundays — no
Typical general contracting prices
| Job | Low | Typical | High |
|---|---|---|---|
| Kitchen remodelPer project: typical range of customer-reported remodels (about $75 to $250 per sq ft). US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | CA$20,510 | CA$37,930 | CA$58,490 |
| Bathroom remodelPer bathroom: typical range of customer-reported remodels. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | CA$9,350 | CA$17,080 | CA$24,820 |
Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.
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Questions about Onyx Building Group
What are Onyx Building Group’s hours?
Onyx Building Group is open Monday to Friday. Its listed hours are Monday to Friday, 7 AM – 6 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.
What areas does Onyx Building Group serve?
Serves Welland and 5 towns within 40 km: Thorold, St. Catharines, Niagara Falls, Port Colborne and Fort Erie. The list is based on the business's location and the usual service radius for general contracting. Confirm your address is covered when you call.
How do I contact Onyx Building Group?
Call Onyx Building Group on (905) 324-1879. The business is at 1789 Merrittville Hwy, Welland, ON L3B 5N5. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.
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