J Squared Roofing
“I cannot thank Justin and his crew enough for their expertise and workmanship!”
Best General Contractors in Belleville, ON
15 companies listed · all 15 in Belleville · 1 open 24/7 · 2 open weekends · 12 rated 4.5+
Data verified October 21, 2026
Quinte Siding & Contracting
“From the quote process to you personally coming out to see the job after it was finished; it was nice to deal with such professional service.”
Upper Canada Waterproofing & Contracting Ltd
“The crew were very polite and most importantly, they respected my property and i feel that they treated my house as their own!”
Bossline Spray Foam Insulation
“They were professional, quick, polite and one of the more important things to me, they were friendly.”
Pauls Walls and Sons Inc.
“Loved all the contractors that renovated my store at 1 Moira St E.”
CP General Contracting
“The finish is absolutely outstanding and the attention to detail is second to none.”
Listed for homeowners in and around Belleville, ON, these 15 companies take on multi-trade work, from a basement build-out to a full renovation. What each one says about licensing, hours and the work it takes on comes from its own website; ratings and quotes come from public reviews.
Area overview: Belleville, ON
All 15 companies we list here are in Belleville itself. We have 17 companies in Belleville on file; this page shows the highest-rated 15. The companies on this page are rated from 3.9 to 5.0 across 352 reviews; 2 have 50 or more reviews and 12 are rated 4.5 or higher. 1 is open around the clock; 2 are open on Saturdays and 1 on Sundays. Domain records put 3 websites of the companies on this page at ten or more years old; the oldest dates from 1999. 1 offers emergency call-outs; 4 give free estimates and 3 are family- or locally-owned. We have a website on file for 13 of the companies on this page; 13 publish a contact page and 10 list a public email. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book.
Do any of these companies quote without charging?
The free estimate promises less on a multi-trade job, and it is advertised by 4 of the 15 companies here. Free normally buys a walk-through and a ballpark figure. A real price takes measuring, trade pricing and desk time, so design-build firms often charge for that stage and credit it against the work if you sign.
I & K Home Renovations
“He guided us through a large renovation by single handedly co-ordinating with engineers for structural design, building permits with the city, and communicating with the kitchen supplier.”
Bel-Con Design-Builders Ltd.
“The best builder's in eastern Ontario”
Quinte Builders Hardware Ltd
Reid's Insulating
“Reid's insulating did an excellent job at our home without trying to oversell.”
Taskforce Engineering Inc
K. Knudsen Construction Limited
Plumb Level Square
“Everything IS "Plumb Level and Square" We love the fence and our dog loves his freedom to run!”
Ron Smith
Cornerstone Builders Ltd
Why these companies made our list
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