Licensed · Insured · WSIB Covered
Built right. Built on time. Built to last.
Renovations, additions and custom builds across York Region, with fixed-price quotes and a 10-year workmanship warranty.
Services
What we build
One crew, start to finish. No subcontractor runaround.
Home Additions
Second storeys, sunrooms and garage conversions designed to blend seamlessly.
Get a quoteProjects
Recent projects
Real homes, real families, real results.
Basement Suite
Newmarket · 6 weeks
Cedar Deck & Pergola
Aurora · 3 weeks
Primary Ensuite
Richmond Hill · 4 weeks
Two-Storey Addition
King City · 14 weeks
Service Areas
Proudly serving York Region
Free on-site estimates within 48 hours anywhere in:
About us
Family-run since 2004
Founded by brothers Mike and Dave Kowalski, Northern Build grew from a two-man framing crew into one of York Region’s most trusted general contractors.
We still answer our own phones, show up when we say we will, and treat every home like our own.
- Fixed-price written quotes
- Permits & inspections handled
- Daily site clean-up
Reviews
What our customers say
“On budget and two days early. The crew was respectful of our home and our kids.”
Sarah K.
Basement finish, Newmarket
“Third contractor we called, first one who showed up. Now we wouldn’t use anyone else.”
Tom & Linda R.
Addition, Aurora
“Clear quote, no surprises, beautiful work. Highly recommend.”
Raj P.
Kitchen reno, Richmond Hill
Get your free quote
Tell us about your project, we’ll call within one business day.
88 Industrial Pkwy N, Aurora, ON L4G 4C3
(905) 555-0147quotes@northernbuild.caMon–Fri 7am–6pm
Sat 8am–2pm
Emergency line 24/7
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