Built to spec
Built to your engineered drawings, survey, and the real site conditions, not a standard package forced to fit.
Oil-Grit Separators are underground treatment devices installed to remove sediment, oil, and debris from stormwater runoff. Harrowgate Group self-performs the work to your engineered drawings, load, and finish, and completes it on site across Markham, the GTA, and Ontario.
Tell us what you need and we’ll get you a quote. Licensed, insured & WSIB certified · Free, no-obligation quote & on-site assessment.
Licensed, insured & WSIB certified · Free, no-obligation quote & on-site assessment.
Built to your engineered drawings, survey, and the real site conditions, not a standard package forced to fit.
Heavy-duty steel and finishes chosen for the load, traffic, and environment on site.
Send specs, drawings, or photos and get a free, no-obligation site visit and estimate with no guesswork.
Installation and site work completed in accordance with Ontario requirements.
Oil-Grit Separators are underground treatment devices installed to remove sediment, oil, and debris from stormwater runoff. Harrowgate Group builds oil-grit separators across Markham to the engineered drawings and the applicable codes, surveyed, built on site, and completed to grade for the real conditions.
Most Markham oil-grit separators jobs involve commercial sites, lots, and municipal drainage. The recurring drivers are treating stormwater to meet water quality requirements, each Markham project is scoped to its own situation rather than a standard package.
What drives oil-grit separators in Markham (York Region) is technology and corporate campuses, commercial and office, institutional, and industrial development. Markham's technology and corporate campuses along the 404 and 407 anchor a strong commercial and institutional construction market, with Markham Centre densifying. Work favours corporate site development, servicing, and structured parking.
The work concentrates around Markham Centre, the 404/407 employment lands, Milliken and Buttonville business areas. Harrowgate Group regularly builds oil-grit separators for Markham clients like corporate and tech owners, developers, institutions, and the City of Markham, each project carrying its own site and requirements.
Across Markham, oil-grit separators covers a real range of property, technology and corporate campuses, commercial and office, institutional, and industrial development. Each calls for a different response, so Harrowgate Group scopes every Markham project to the building and its use rather than one playbook.
The Markham variables that matter are corporate-campus site standards, transit-corridor density, and servicing around the 404 and 407. Each Markham project has the methods, materials, and equipment chosen for that environment, matched to the site instead of a one-size approach.
Harrowgate Group keeps Markham oil-grit separators on schedule, from quote to crew on site with fast mobilization, then built to grade and documented through to completion.
Harrowgate Group scopes each Markham project on site, builds the work to the load and the plan, and verifies the finished project, a controlled process from survey through to a documented sign-off.
Harrowgate Group treats coordination as part of the build. On a Markham oil-grit separators project, that means working from the engineers' and architects' drawings, looping in geotechnical and civil consultants where the ground demands it, and coordinating with city planners and inspectors, so the Markham project is built to the approved design and passes the inspections that matter.
On a typical Markham project the oil-grit separators work covers commercial sites, lots, and municipal drainage around Markham Centre and clients like corporate and tech owners, each scoped to its own situation and recorded for the file. Harrowgate Group also serves nearby Richmond Hill, Vaughan, Scarborough, so projects spanning the surrounding area stay with one team.
Harrowgate Group builds each Markham project to a clear scope: the right methods, the right materials, and results checked against the plan, documented so it holds up to inspection and the project record.
Harrowgate Group earns Markham oil-grit separators work the hard way, fast mobilization, licensed, insured, and fully WSIB-covered crews, with 20 years serving the area, and real familiarity with Markham Centre, the 404/407 employment lands, Milliken and Buttonville business areas rather than a one-size regional script.
Self-performed on site to the engineered drawings, coordinated with concrete, servicing, and the surrounding work, then a clean, documented finish.
In short: Oil-Grit Separators are underground treatment devices installed to remove sediment, oil, and debris from stormwater runoff. For Markham projects, it's built to the engineered drawings and the applicable codes, self-performed on site.
Yes, we respond across Markham and the surrounding area. Response time is fast mobilization.
Across Markham, the work concentrates around Markham Centre, the 404/407 employment lands, Milliken and Buttonville business areas, each job scoped to its own conditions.
Mostly technology and corporate campuses, commercial and office, institutional, and industrial development, Harrowgate Group serves developers, contractors, municipalities, and property owners across Markham.
In Markham, the work accounts for corporate-campus site standards, transit-corridor density, and servicing around the 404 and 407, so the methods, materials, and equipment is matched to the site.
Stormwater treatment. For Markham, every project is sized to the actual conditions.
Harrowgate Group responds to Markham with fast mobilization, covering Markham Centre, the 404/407 employment lands, Milliken and Buttonville business areas and the surrounding area.
All of Markham, Markham Centre, the 404/407 employment lands, Milliken and Buttonville business areas and the surrounding neighbourhoods, plus nearby Richmond Hill, Vaughan, Scarborough.
Yes, Harrowgate Group handles technology and corporate campuses, commercial and office, institutional, and industrial development across Markham, from focused scopes to full builds, each set to its own site and drawings.
Cost depends on the site conditions, the ground, the scope, and the engineered requirements, Harrowgate Group reviews the drawings and the site for each Markham project and provides a clear, documented quote.
Yes, Harrowgate Group assesses Markham oil-grit separators on site and provides a documented scope before any work begins.
Real knowledge of Markham, Markham Centre, the 404/407 employment lands, Milliken and Buttonville business areas, fast mobilization, work that is licensed, insured, and fully WSIB-covered, and full documentation on every project.
Harrowgate Group has served York Region since 2006, 20 years of hands-on experience.
Harrowgate Group surveys and scopes it on site, builds the work to the engineered drawings and the applicable codes, and completes it to grade, handled by one accountable team across Markham.
Yes, Harrowgate Group builds the work across Markham and the surrounding area and manages it end to end, coordinating any engineers, consultants, and municipal approvals the project needs. We do the work, not just hand it off.
Commercial and heavy-civil construction, self-performed for developers, contractors, property managers, and municipalities.
Send drawings, a site plan, or a description of the scope. Harrowgate Group is licensed, insured, and WSIB certified.
Licensed, Insured & WSIB Certified · Self-performed and documented on every job
Tell us what you need and we’ll get you a quote. Licensed, insured & WSIB certified · Free, no-obligation quote & on-site assessment.
Harrowgate Group provides oil-grit separators, delivered and installed with quote-ready support across Toronto and surrounding Ontario communities.
Companies We've Worked With
Harrowgate Group delivers commercial and heavy-civil construction for developers, contractors, institutions, municipalities, and property groups across Ontario.