Commercial Construction
New buildings, renovations, tenant build-outs and design-build for business owners, landlords and developers, delivered by one accountable team from permits to keys.
Commercial construction across Ontario
Commercial projects run on dates: a lease commencement, an opening day, a tenant waiting to move in. Harborline Sterling Construction Inc. builds, renovates and fits out commercial space for business owners, franchise operators, landlords, property managers and developers, with one point of responsibility from early budgeting and approvals through construction and closeout.
Choose the delivery model that fits your project: a single contract for the whole build, design-build, construction management or an advocate managing others on your behalf. For property managers, our small works service handles repairs and turnovers with the same accountability.
Every project is overseen by one of our founding principals, Mansoor Alam Khan or Maqsood Mohammed, so decisions get made quickly and you always know who is accountable.
Commercial services
Seven services, each scoped to a specific kind of commercial project, so you always know which one fits.
Commercial New Construction
Ground-up commercial buildings, from site work through final closeout.
Learn moreCommercial Remodeling and Additions
Renovation and expansion of commercial buildings you already own or operate.
Learn moreCommercial Project Management
Owner's-side project management: an experienced advocate on your side of the table.
Learn moreCommercial Construction Management
Hands-on leadership of the build: supervision, trades, quality, schedule and inspections.
Learn moreTenant and Office Build-Outs
Interior finish-out that turns leased space into a working office, clinic, store or restaurant.
Learn moreCommercial Design-Build
One contract for design and construction, with cost and constructability built into the design.
Learn moreFacility Maintenance and Small Works
Repairs, unit turnovers, accessibility upgrades and small projects for property managers and owners.
Learn moreMarket sectors
How we build restaurants, clinics, offices, warehouses, places of worship, hotels and more.
View market sectorsTalk to us first
Tell us about the project and we will recommend the approach that fits, even if that means a smaller role for us.
Start a conversationWhich commercial service is right for you?
A quick guide to how the options differ.
| Service | You want | We do | Good fit when |
|---|---|---|---|
| Commercial New Construction | A new building, delivered | Build it from site works to occupancy under one contract | You have land and a design, or need a design coordinated |
| Commercial Design-Build | Design and construction in one | Lead the design team and build under one contract | You want speed, price certainty and one point of responsibility |
| Commercial Remodeling and Additions | An existing building improved | Renovate or expand, often while you operate | You own or operate the building and need more from it |
| Tenant and Office Build-Outs | Leased space ready to trade | Finish the interior to your lease and your operations | You have a lease and an opening date |
| Commercial Construction Management | Control, with expert site leadership | Run the build on site while you keep visibility of trade costs | You want transparency and earlier contractor input |
| Commercial Project Management | An advocate overseeing others | Manage scope, budget, bids and consultants for you | You are funding the project but not running it |
| Facility Maintenance and Small Works | Repairs and small projects handled | Scope, price and complete small works with documentation | You manage buildings and need a responsive partner |
Commercial property types we build
31 property types across five market sectors, each with its own requirements.
Retail and Restaurants
Stores, restaurants and the centres around them, built around your opening date.
- Car Dealerships
- Gas Stations
- Grocery Stores
- Malls
- Restaurants and Cafés
- Retail Stores
- Shopping Centres
- Strip Plazas
Office and Medical
Workplaces and care spaces where precision, privacy and compliance matter.
Explore sectorIndustrial and Warehouse
Functional, durable buildings and infrastructure designed around operations.
- Factories
- Industrial Processing
- Manufacturing
- Metal Buildings
- Energy and Fuel Facilities
- Power Generation
- Self-Storage
- Warehouse and Flex Space
- Water and Wastewater
From first call to final handover
Every project follows the same five stages, because predictability is the product.
Consultation
We learn what the project has to achieve, visit the site and give you a straight read on scope, budget range and timeline before anyone signs anything.
Design and preconstruction
We coordinate designers and engineers, price the work against real trade quotes, order long-lead items early, and resolve conflicts on paper, where changes cost nothing, instead of on site, where they cost plenty.
Permits and approvals
Every Ontario municipality runs its own building department and review process. We file with the right authority, answer plan-review comments and coordinate Ontario Building Code requirements, so approvals never become the surprise that eats your schedule.
Construction
Sequenced trades, a site-specific safety plan, quality checks before work is covered up, inspections booked to keep the job moving, and regular updates so you always know where things stand.
Closeout
Final inspections, a deficiency walk-through, as-built drawings, manuals and warranty documents. Then we hand you the keys to a finished space.
Why businesses choose Harborline Sterling
Commercial construction has enough variables without a contractor who goes quiet. Here is how we take them off your plate.
One accountable team
One contract, one point of contact, one builder responsible for the schedule, the budget and every inspection in between.
Principal-led
One of our founding principals oversees every project, so you get senior judgment, quick decisions and a direct line to the people accountable for the result.
Responsive
Calls returned promptly, questions answered the same day where possible, and problems raised early, while they are still cheap to fix.
Real numbers
Budgets built from real trade pricing, written change orders and plain-language cost reports. No surprises at the end of the month.
Ontario compliance built in
The Building Code, municipal approvals, the Occupational Health and Safety Act, WSIB and the Construction Act are part of how we plan from day one.
A clean finish
Inspections, deficiency lists, training, as-built drawings and warranties, so you take possession with confidence.
Related reading
Planning a projectGeneral Contracting, Construction Management or Project Management: Which Fits Your Project?
Three ways to deliver a commercial project, and how to choose the right one for your budget, schedule and level of involvement.
Read article
Planning a projectHow to Hire a Commercial Contractor in Ontario: 10 Things to Check
WSIB clearance, insurance, contracts, holdback and prompt payment: what to confirm before you sign.
Read articleFrequently asked questions
Which commercial service is right for my project?
If you want one company to deliver the building, choose new construction, remodeling or a build-out. For design and construction under one contract, choose design-build. For closer control of trade costs with an expert running the site, choose construction management. If you want an advocate overseeing others, choose project management.
Can you work to a landlord's requirements?
Yes. We review the landlord's work letter, building standards and construction rules up front, so the work meets what your lease requires.
Can you build while my business stays open?
Yes. We phase work, control dust and noise, schedule disruptive tasks after hours where needed, and keep your staff and neighbouring tenants informed.
Do you handle small repairs for property managers?
Yes. Our facility maintenance and small works service covers repairs, unit turnovers, accessibility upgrades and site repairs, with documented completion.
Do you handle permits and approvals?
Yes. We prepare and manage permit applications with the municipality that governs your site, respond to plan-review comments, and coordinate Ontario Building Code requirements, inspections and any conservation authority approvals so the schedule holds.
What areas do you serve?
We are based in Toronto and work across Ontario. Our core service area runs from Hamilton and Halton through Peel, Toronto, York and Durham, and north to Innisfil and Barrie. For the right projects, we work anywhere in the province.
Ready to start your commercial project?
Put one accountable team in charge: on schedule, on budget, with permits and inspections handled the whole way.
Start your project
Tell us what you are planning. We will set up a straightforward conversation about scope, budget and timeline, with no obligation.