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ICI General Contractor · Industrial · Commercial · Institutional · Ontario

Industrial, Commercial
& Institutional
Construction Ontario

Ontario ICI general contractor and design-builder. Non-combustible steel warehouses, cold chain and food-grade facilities, long-term care homes and purpose-built rental, foundation through occupancy under one contract. Headquartered in Simcoe County, building across the GTA and Ontario.

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30+
Years of Experience
100,000 sq ft
Ramara Industrial Park
Ontario
Province-Wide Service
Non-Combustible Steel WarehousesCold Storage & Food-Grade FacilitiesRigid Frame Steel BuildingsPile & Grade Beam FoundationsMetal Roofing & IMP EnvelopeLong-Term Care ConstructionPurpose-Built Rental & CMHC MLI SelectCommercial & Institutional ConstructionEU-GMP Certified FacilitiesSite Servicing & Industrial ParksSimcoe County · GTA · Ontario
What We Build

Every Sector. Every Scale.

Industrial, cold chain, data centres, healthcare, multi-residential, infrastructure, custom homes and commercial. If it gets built in Ontario, we build it, managing every phase from permits to occupancy.

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01
Industrial construction Ontario: EU-GMP pharmaceutical and manufacturing facility Simcoe County
Industrial & Manufacturing

Warehouses, EU-GMP pharmaceutical facilities, IMP industrial parks, and manufacturing plants from Simcoe County to the GTA.

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02
Cold storage and food-grade construction Ontario: refrigerated warehouses, freezers and food processing plants
Cold Chain & Food-Grade

Refrigerated warehouses, freezers, cold chain distribution centres and food processing plants, with insulated metal panel envelopes and CFIA-ready interiors.

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03
Data centre construction Ontario: Tier III and Tier IV colocation and enterprise facility builds
Data Centres

Tier III and IV mission-critical data centre construction in Ontario, meeting the highest standards for uptime, redundancy, and security.

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04
Healthcare and medical facility construction Ontario: long-term care homes, retirement residences, and regulated healthcare environments
Healthcare & Medical

Long-term care homes, retirement residences, medical office buildings, and regulated healthcare facilities, managed to Ministry, RHRA, and ICRA standards.

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05
Multi-residential apartment building construction Ontario: CMHC-funded and purpose-built rental housing
Multi-Residential

Apartment buildings, condominiums, townhomes, and stacked housing across Ontario, from zoning amendments to construction completion.

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06
Infrastructure and site servicing construction Ontario: roads, utilities, and civil works
Infrastructure & Site Servicing

Roads, sewer and watermain, stormwater management, lot clearing, grading, and utility trenching anywhere in Ontario.

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07
Luxury custom home and residential subdivision construction Ontario, design-build general contractor
Custom Homes

Premium custom homes in Ontario, including waterfront and urban builds, managed with the same rigour as our most complex commercial projects.

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08
Commercial construction Ontario: ICI general contractor for retail, office, and commercial projects
Commercial & Retail

Office towers, retail plazas, mixed-use developments, and tenant build-outs across Ontario, delivered on schedule with full permit management.

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Completed & Active Projects

Proof of Delivery

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Terrahills Developments general contracting and ICI project management Ontario Infrastructure and site servicing construction Ontario: roads, utilities, and civil works
Why Terrahills

Ontario's ICI Builder, Construction Team

From the moment you have a site, or even before you do, Terrahills manages every step. Land acquisition, permits, design, construction, and handover. One accountable team. Zero gaps. Serving every municipality in Ontario for over 30 years, from the GTA and Simcoe County to Northern Ontario communities like Sudbury, Thunder Bay, Timmins, and Sault Ste. Marie, and Eastern Ontario from Ottawa to Kingston, Belleville, and Brockville.

01
One Team, Every Phase

Land acquisition, feasibility, permits, site servicing, construction and handover under one contract. No gaps between consultants and builders, and one party accountable for the result.

02
Open-Book Pricing

Every trade tender, every cost line and every change order is visible before it happens. Class A through C estimates in preconstruction, then full reporting through to occupancy.

03
LEED & NetZero Capable

NetZero and LEED certification pathways on every eligible project, with SIP, IMP, mass timber and prefabricated assemblies that cut schedules and lower operating costs.

04
Thirty Years, Every Municipality

Three decades of ICI delivery from Simcoe County across Toronto, the GTA, Ottawa, Hamilton and every community in Ontario, with a certified safety program on every site.

Full-Cycle Construction Services

From Empty Land
to Occupied Building

Every service you need, under one contract, across all of Ontario.

Hire one team and never manage the gap between your designer and your builder again. Terrahills handles every service from first feasibility call to occupancy certificate.

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01
Land Acquisition & Feasibility
  • Preliminary planning consultation
  • Development feasibility study
  • Land acquisition consultation
  • Marketing consultation
  • Preconstruction sales consultation
02
Permits, Planning & Design
  • Architectural drawings & AutoCAD drafting
  • Official plan & zoning amendments
  • Site plan application
  • NetZero design
  • LEED certification
03
Site Servicing & Grading
  • Portable bridges & remote access
  • Lot clearing, grading & regrading
  • Sewer & watermain connections
  • Stormwater management
  • Road & parking lot paving
04
Engineering
  • Structural engineering
  • Mechanical designs & calculations
  • Building permit application
05
Construction & Project Management
  • Full project management
  • Subcontractor prequalification & tendering
  • SIP, IMP & precast panel installation
  • Mass timber construction
  • Flat-roofing systems
06
Cost Estimating & Budgeting
  • Class A through C cost estimates
  • Quantitative surveys
  • Project bookkeeping & accounting
07
Facility Management
  • Corporate facility management programs
  • Preventive maintenance & repairs
  • Occupied-building renovation & fit-outs
  • Condition assessments & capital planning
Guides & Industry Insights

Built to Inform

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FAQ

Questions Prospective Clients Ask Us

Clear answers about hiring a general contractor or project manager in Ontario.

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Read Our Project Guides →
Terrahills adheres to Tier III and IV standards for all data centre construction projects across Ontario, ensuring high availability, redundancy, power resilience, and robust physical security. We manage every phase from site selection and permitting through mechanical and electrical coordination to commissioning.
We build retail fit-outs, office complexes, commercial plazas, mixed-use developments, and industrial facilities across Ontario. Our scope covers project management, regulatory compliance, architectural coordination, trades management, and delivery from permit to occupancy under one contract.
Yes. We build low-rise and mid-rise apartment buildings, purpose-built rental housing, stacked townhomes, and mixed-income developments across Ontario. We manage the complete scope: zoning and official plan amendments, site servicing, architectural coordination, full construction management, and CMHC documentation support through to occupancy.
Yes. We have direct experience structuring and delivering projects under CMHC MLI Select, including the Energy Efficiency, Affordability, and Accessibility streams. We understand the construction timelines, documentation standards, and building requirements that CMHC lenders require, and manage the entire build to meet them from land acquisition through occupancy.
Yes. Terrahills builds premium custom homes, estate residences, waterfront and lakefront homes, semi-custom homes, and urban infill builds across Ontario. We manage every phase: architectural coordination, permits and approvals, site work, and full construction, under one contract with the same rigour we bring to our commercial and industrial projects.
Yes. We manage residential subdivision development from start to finish: land acquisition, lot severance, official plan amendments, zoning by-law applications, site servicing, road construction, and the full construction of townhome communities and single-family home developments. Whether you are developing a large subdivision or severancing a single lot, we manage the complete scope.
Yes. Beyond general contracting, Terrahills provides development consulting and owner's representative services, including land feasibility analysis, development pro forma review, preconstruction planning, permit strategy, and project oversight for owners who need expert representation throughout the development process.
Integrated project delivery (IPD) means one team manages every phase: land acquisition, permits, design coordination, site servicing, construction, and occupancy, under a single contract. This eliminates gaps between consultants and contractors, reduces delays, and gives owners a single point of accountability. It is the core model Terrahills uses on every project.
We specialize in NetZero design and LEED certification pathways, and work with mass timber, Structural Insulated Panels (SIPs), and Insulated Metal Panels (IMPs) to reduce embodied carbon and long-term operating costs. Our approach embeds sustainability from design through construction on every project.
Terrahills is headquartered in Ramara, Simcoe County and serves all 444 Ontario municipalities, including Toronto and the GTA, Barrie, York Region, Hamilton, Ottawa, Kitchener-Waterloo, London, and every community in between. There is no project location in Ontario we will not consider.
Our infrastructure and site servicing scope includes road and parking lot paving, utility trenching (hydro, cable, internet), sewer and watermain connections, stormwater management, culverts, dewatering, portable bridges, lot clearing, grading and regrading, maintenance holes, and transformer concrete works, for developers, municipalities, and private clients across Ontario.
Terrahills Developments Inc. has been delivering construction projects across Ontario for over 30 years. Our experience spans EU-GMP certified pharmaceutical facilities, Tier IV data centres, multi-unit industrial parks, CMHC-funded rental housing, luxury custom homes, and infrastructure projects across every major Ontario market.
Contact us through the Get a Quote page or call 365-688-9387. Provide details on your project type, location, approximate size, and timeline. We will schedule a consultation, review the scope, and provide a detailed proposal. There is no obligation and the initial consultation is free.
Yes. Terrahills builds and manages construction for the full range of Ontario healthcare facilities, including long-term care homes, retirement residences, medical office buildings, ambulatory care centres and community health centres, and mental health facilities. Our EU-GMP pharmaceutical facility construction experience gives us the regulated-environment, infection-control, and documentation discipline that healthcare construction demands. We manage Ministry of Long-Term Care, RHRA, and ICRA requirements under one contract.
Terrahills completed a 12,000 sq ft EU-GMP certified pharmaceutical facility in Simcoe County in 2021, one of the most stringent regulated-environment construction categories in existence, requiring pharmaceutical-grade documentation, validation protocols, clean-environment construction, and zero-tolerance contamination controls. This experience directly applies to healthcare construction where ICRA protocols, Ministry of Health standards, and occupied-facility construction management follow the same disciplines.
General Contractor · Province-Wide

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Get a free quote from Ontario's most capable general contractor. We build industrial, cold chain, data centre, healthcare, multi-residential, infrastructure, custom home and commercial projects anywhere in the province.

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