Toronto & GTA Basement Contractors
Turn your unfinished basement into a space you'll actually live in
Northstones designs and builds custom basement renovations for homeowners across the GTA — from legal secondary suites to home theatres and in-law suites. One team, start to finish, no subcontractor guesswork.
Built on Experience, Driven by Integrity
A dedicated team, not a rotating cast of subcontractors
Since 2014, Northstones has helped homeowners across Vaughan, Richmond Hill, Newmarket, Scarborough, Markham, Toronto and the Durham Region turn unused basements into living space, home offices and rental-ready suites.
We handle design, permits, construction and finishing under one roof, so you get one point of contact and one team accountable for the result — not a patchwork of trades.
- Trusted expertise
- Quality craftsmanship
- Transparent process
- Custom design solutions
- Timely project delivery
- Client-focused service
What We Build
Basement services for every goal
Every project starts with a free consultation to scope your space, budget and timeline.
Basement Finishing
Turn an unused basement into a stylish, functional living space.
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Basement Restoration
Waterproofing and structural repair to protect your investment.
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Basement Renovation
Full renovations tailored to your household's needs and lifestyle.
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Basement Remodelling
Reworking layout and finishes to modernize an existing basement.
Learn more →How We Work
A clear process. No surprises.
The same four stages, every project, so you always know what happens next.
Consultation & Discovery
We learn your goals, lifestyle needs and how you want to use the space.
Design & Planning
We map out an efficient layout and a fixed quote before any work starts.
Execution & Construction
Our own crew builds it — with regular updates, not surprise change orders.
Finishing & Handover
A final walkthrough to confirm every detail meets your expectations.
Recent Work
Spaces that speak for themselves
Client Reviews
What GTA homeowners say
Every step, from the first meeting to the final walkthrough, went smoothly. The crew was skilled and kept us updated the whole way.
Our basement finally feels like part of the house. They were meticulous about the details and easy to communicate with throughout.
We brought Northstones in for a full office build-out and the result looks and functions exactly how we hoped — on schedule.
Service Area
Proudly serving the GTA & Durham Region
If you're within these areas, we can typically get a crew and a quote to you within a few days of your consultation.
Call (647) 333-9971Ready When You Are
Let's build the basement your home is missing
Book a free, no-obligation consultation — we'll walk your space and give you a straight answer on scope and cost.
(647) 333-9971
