One integrated team delivering cost certainty, schedule control, and single-source accountability across Southwestern Ontario.
Grassmere Construction has been building trust and delivering quality since 1988. With decades of experience in industrial, commercial, and institutional projects across Southwestern Ontario, we combine proven processes with local expertise to help owners achieve predictable outcomes. Our design-build approach simplifies delivery, reduces risk, and ensures your project moves forward with confidence.
Grassmere Construction is a Design-Build, Construction Management firm based in Tillsonburg, Ontario. We specialize in Industrial, Commercial, and Institutional building projects. From new facilities, major renovations, and metal reroofs throughout Southwestern Ontario.
Grassmere Construction has put forward the experience, knowledge,
and expertise of its team to deliver successful industrial building
projects for the last 30 years.
Grassmere Construction has put forward the experience, knowledge, and expertise of its team to deliver successful industrial building projects for the last 30 years.
Grassmere Construction has put forward the experience, knowledge, and expertise of its team to deliver successful commercial projects for the last 30 years.
Grassmere Construction has put forward the experience, knowledge, and expertise of its team to deliver successful institutional building projects for the last ten years.
Three-Phase Design and Construction
Feasibility & Design
Site verification, OBC and life-safety review, geotechnical and environmental inputs, stormwater management, preliminary design, 3D renderings, and concept budget.
Detailed Design & GMP
Final drawings, permit packages, bid spreads, and a Guaranteed Maximum Price with baseline schedule.
Build & Commission
Safety and quality control, weekly owner reporting, and seamless turnover.
Grassmere is working with Attrell Toyota, a repeat client...
Grassmere was the chosen proponent of a public tender request to perform the site development and construction of a turn-key 4,000 sf pre-engineered building expansion for Woodstock Transit.
Goss Auto`s New Manufacturing Plant Strathroy-Caradoc, ON Grassmere worked with Goss Global using the Design-Build method to Design, Develop and Construct their new automotive parts manufacturing plant in Strathroy-Caradoc. The
We are in the process of building our new office building to accommodate our growing team!...
Grassmere has partnered with Progressive Industrial Fluids using the Design-Build...
Kaycan Building Expansion Barrie, ON Grassmere constructed two pre-engineered building additions for Kaycan at their facility in Barrie, ON. We also recladded the front block facade to seamlessly match the
Food Storage Warehouse Parry Sound, ON Grassmere has supplied and installed the 22,000 sf pre-engineered Butler building to be used for food storage by Crofter Foods. This is one of
Norwich Community Centre Metal Reroof Norwich, ON Grassmere removed the existing screw-down metal roof system and replaced it with a new metal standing seam roof system that includes 12″ of
Building Reclad Oakville, ON Grassmere recladded the metal walls and roof of this industrial building. We also restored the concrete perimeter walls. Basic Specifications: Client: Industrial Location: Oakville, ON Project
Grassmere was awarded the demolition and major exterior & interior...
Grassmere is in the process of installing a 10,550 sf Butler pre-engineered metal...
Grassmere is in the process of installing two Butler pre-engineered metal buildings...
Grassmere Construction worked with a long term client in Woodstock to expand their...
The old metal roof was in need of a replacement. Grassmere Construction...
Grassmere has designed a 21,600 sf pre-engineered metal building that is currently...
Grassmere Construction has torn down the existing office and is rebuilding...
New Metal Reroof Coyles Product Ltd
We worked with the client on several different designs in order to achieve...
The existing building is an older commercial plaza that was in need...
Grassmere designed, supplied, and erected...
As a local Butler Builder, Grassmere delivers fast, cost-effective, and sustainable pre-engineered building systems. From new facilities to metal-over-metal MR-24 reroofs, we help owners improve efficiency with minimal disruption to operations.
Grassmere Construction is honoured to be recognized by Metal Construction News magazine as the 33rd largest metal…
In 2020, Butler Manufacturing introduced FIVE new products to benefit clients looking for the best solutions within the pre-engineered metal buildings markets.
In 2020, Butler Manufacturing introduced FIVE new products to benefit clients looking for the best solutions within the pre-engineered metal buildings markets.
Design-build places design and construction under one contract with a single accountable team. This integrated approach streamlines coordination, reduces risk, and helps owners move faster compared to traditional design-bid-build. Grassmere’s page explains that the contractor and architect or engineer are allied to serve the owner as one team.
Grassmere follows a three-phase process. Phase 1 covers site investigation, Ontario Building Code and life safety analysis, environmental and geotechnical inputs, preliminary design, 3D renderings, and budgets. Phase 2 includes final drawings, permit and construction packages, bid spreads, and the Guaranteed Maximum Price with the baseline schedule. Phase 3 is construction with safety, reporting, and turnover.
Owners gain cost certainty, schedule compression, and single-source accountability. Grassmere highlights that the team structure encourages problem-solving and minimizes blame shifting, while the integrated workflow supports faster delivery and budget control.
Yes. Grassmere is a local Butler Builder and delivers pre-engineered metal building systems, including new facilities and metal-over-metal MR-24 reroofs. This capability provides speed, efficiency, and durable performance within a design-build framework.
Grassmere specializes in industrial, commercial, and institutional projects across Southwestern Ontario.
Grassmere displays certification badges that signal health and safety excellence and partnership credentials, including COR, WSIB Safety Group, and Butler Builder designation. These reinforce a commitment to safe, high-quality project delivery.
Begin with a feasibility conversation. Grassmere’s process starts with site verification, code and life safety review, and preliminary design and budgeting, which helps owners validate scope, approvals, and timelines before advancing to final drawings and GMP.
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