If you’ve never built a steel building before, the process can feel like a black box. You know you need a warehouse, shop, or hangar – but what actually happens between that first phone call and the day you get the keys? Who does what? How long does it take? And how much of it lands on your plate?
This guide walks through the whole journey from the owner’s point of view, stage by stage. For each step you’ll see what happens, who handles it, what you need to decide or provide, and roughly how long it takes. One theme runs through all of it: whether you hire a single design-build partner to manage the entire process or stitch it together from separate companies makes a big difference to how smoothly it goes. We’ll come back to that.
What makes a building “pre-engineered” – and why it makes this easier
A pre-engineered steel building has its structural frame engineered and fabricated to your specifications in a factory, then delivered to site and assembled. Because so much is worked out and manufactured up front, the process is more predictable and much faster than conventional construction – the frame can be built in the factory while your site is being prepared, so two big phases happen at once. Keep that parallel-tracking in mind; it’s why the timeline below is shorter than you might expect.
The stages, from idea to keys
Stage 1 – Planning and feasibility
What happens: You and your building partner define what you’re actually building – the size, the use, the budget, and the site. This is where rough concepts, site constraints, and a realistic budget range come together, and where a feasibility check confirms the project makes sense before anyone spends money on detailed design.
Who does it: You, working with your design-build partner’s planning team.
What you decide/provide: Your intended use and must-haves, your budget, and your site (or candidate sites).
Roughly how long: A few weeks, depending on how defined your needs already are.
Stage 2 – Preliminary design
What happens: The concept becomes a preliminary building layout – floor plan, elevations, a 3D model, and a preliminary structural approach. You get to see and react to the building before it’s fully engineered.
Who does it: The design team (JCI does this in-house, including architectural work).
What you decide/provide: Feedback on layout, dimensions, doors and openings, aesthetics, and any future-expansion plans.
Roughly how long: A few weeks, with a round or two of revisions.
Stage 3 – Detailed design and engineering
What happens: The building is fully engineered. This produces the complete structural frame design, the final column reactions and foundation design, and the mechanical and electrical plans – all coordinated in BIM software so the pieces fit together before anything is built.
Who does it: The structural, architectural, mechanical, and electrical engineers. JCI’s in-house multidisciplinary team handles all of these under one roof, which avoids the gaps that appear when separate firms hand drawings back and forth.
What you decide/provide: Sign-off on the detailed design and any final specification choices.
Roughly how long: Several weeks.
Stage 4 – Permitting and approvals
What happens: The engineered drawings are submitted to your local authority (municipality or regional district) for a building permit, along with any other approvals your site requires. In BC, requirements and timelines vary by jurisdiction.
Who does it: Your design-build partner prepares and submits the permit package; the authority reviews it.
What you decide/provide: Not much at this stage beyond responding to any authority questions – but this is the step most likely to add unpredictable time, so starting it early matters.
Roughly how long: Highly variable by municipality – from a few weeks to a few months.
Stage 5 – Fabrication
What happens: Your building’s steel frame is manufactured in the factory – columns, rafters, and framing members cut, formed, welded, and finished to the engineered design, then labelled for assembly. JCI builds on its partnership with Nucor Building Systems for this. Crucially, this happens in parallel with the site work in the next stage.
Who does it: The steel manufacturer.
What you decide/provide: Nothing day-to-day; the design is locked by now.
Roughly how long: Several weeks, overlapping with site prep.
Stage 6 – Site preparation and foundation
What happens: Your site is cleared, excavated, and graded, and the engineered foundation is installed – the slab, footings, or piles designed for your building’s loads and your site’s soil. (This is the single biggest cost variable on most projects; our foundation guide explains why.)
Who does it: The site and concrete crews. JCI self-performs excavation and foundations rather than subcontracting them out.
What you decide/provide: Site access and any site-specific information; a geotechnical (soils) report if not already done.
Roughly how long: A few weeks, running alongside fabrication.
Stage 7 – Delivery and erection
What happens: The fabricated frame arrives on site, labelled and ready, and the crew erects it – columns up, rafters set, frame braced and bolted together. This is the dramatic part: a pre-engineered frame goes up fast, and a building that took weeks to design can take shape in days.
What to expect on your site: A crane and an erection crew, some noise, and the need for clear site access and laydown space for the delivered steel. It’s active but efficient.
Who does it: The erection crew (JCI performs building erection).
Roughly how long: Days to a few weeks depending on building size.
Stage 8 – Envelope: cladding, roof and insulation
What happens: The building is made weather-tight – roof and wall cladding, insulation, windows, doors, gutters and downspouts. For a conditioned building this is where the insulated panel system goes on, setting up the building’s energy performance and condensation control (see our insulation guide).
Who does it: The installation crews.
What you decide/provide: Final choices on cladding finish, colours, and openings if not already locked.
Roughly how long: A couple of weeks, depending on size and complexity.
Stage 9 – Mechanical, electrical and interior finishing
What happens: The shell becomes a usable building – electrical, mechanical and plumbing systems, plus any interior finishing like offices, mezzanines, lighting, and floors.
Who does it: Mechanical, electrical, and finishing trades. JCI performs mechanical, electrical, and interior finishes in-house.
What you decide/provide: Interior layout and finish decisions, and any specialized equipment requirements.
Roughly how long: Varies widely with how much interior fit-out you need.
Stage 10 – Inspections and handover
What happens: Final inspections confirm the building meets code, and the finished building is handed over to you – turnkey.
Who does it: The authority’s inspectors and your building partner.
What you decide/provide: Final walkthrough and acceptance.
Roughly how long: A short final phase.
So how long does the whole thing take?
Every project is different, but because design, fabrication, and site work overlap, a pre-engineered building typically reaches completion faster than a comparable conventional build. As rough planning guidance, a straightforward project often runs on the order of a few months from detailed design to handover, with permitting the biggest wildcard that can stretch the timeline. The best way to get a real timeline is to have your building partner map it to your specific project and municipality.
Why one design-build partner beats hiring each piece separately
Notice how many different disciplines touch a steel building: planning, architecture, structural and MEP engineering, permitting, fabrication, excavation, foundations, erection, envelope, and interior trades. You can hire each of those separately – a designer here, an engineer there, a foundation contractor, a separate erector – and coordinate them yourself. But every handoff between separate companies is a place for gaps, delays, and finger-pointing when something doesn’t line up.
The alternative is a single design-build partner who carries the project from first sketch to final inspection. JCI works this way deliberately: in-house design and engineering, plus self-performed excavation, foundations, erection, mechanical, electrical, and finishing. That means one team accountable for the whole building, one point of contact, and a design that’s coordinated across every discipline before it’s built – which is exactly how you keep a project on time and on budget.
Where projects go wrong – and how to avoid it
Most steel building headaches trace back to a few predictable sources:
- Unknown soil conditions. A surprise below grade is the classic budget-buster. A geotechnical report early in the process removes most of that risk.
- Permitting delays. The approval stage is the least predictable part of the timeline. Getting the permit package in early and complete is the best defence.
- Poor coordination between separate parties. When the designer, engineer, and builders don’t talk, small mismatches become expensive on-site changes – the core argument for a coordinated design-build team.
- Scope creep late in the project. Locking layout and finish decisions before fabrication keeps changes cheap.
Frequently asked questions
How long does it take to build a pre-engineered steel building?
Because design, fabrication, and site work overlap, it’s typically faster than conventional construction – often a few months from detailed design to handover for a straightforward project, with permitting the biggest variable. Your building partner can map an accurate timeline to your project and municipality.
Do I need to hire my own architect and engineer?
Not with a design-build partner. A firm like JCI provides architectural, structural, mechanical, and electrical design in-house, so you don’t have to assemble and coordinate separate professionals yourself.
Are permits included, and who handles them?
Your design-build partner typically prepares and submits the permit package to your local authority. Permit timelines vary by municipality in BC, so it’s worth starting early.
What’s the difference between a steel building “kit” and a full build?
A kit is just the fabricated components delivered to you – you’re responsible for design finalization, foundation, erection, and everything else. A full design-build delivers the finished, turnkey building with one team managing the whole process. For a commercial project, the full-service route is usually far less risk and hassle.
What happens on my site during erection?
Expect a crane and an erection crew, delivery of the labelled steel, some noise, and the need for clear access and laydown space. It’s an active stage, but a pre-engineered frame goes up quickly.
Ready to start your project?
Knowing the steps takes the mystery out of building – and shows why having one team carry your project from design through construction keeps it on track. JCI Buildings designs and builds pre-engineered steel buildings across British Columbia, managing the entire journey from first sketch to final inspection. Talk to our team or request a quote and we’ll map out exactly what your project would look like, stage by stage.
Note: timeline ranges are typical industry guidance and vary by building size, site, and municipal permitting.
