Owners almost always ask the same first question: how long is this going to take? The honest answer is that a commercial building has a lot of moving parts, and the calendar is set as much by paperwork and lead times as by the crews swinging hammers. Here is the typical sequence, roughly what each stage costs you in time, and where a project usually speeds up or bogs down.
Every duration below is a ballpark for a mid-sized commercial project. Small tenant finish-outs move faster; large ground-up buildings, complex sites, or difficult approvals take longer. Treat these as planning ranges, not promises, until a real budget and schedule are built around your specific drawings.
Preconstruction and Design
Long before anyone pours concrete, the project takes shape on paper. Preconstruction is where you set the program (what the building needs to do), the budget, and the schedule. The design team develops drawings from a rough concept through schematic design, design development, and finally construction documents that a contractor can actually price and build from.
This stage protects the whole project. A budget built early, and kept current as the drawings mature, is the number you finance and plan against. When design and pricing move together, you catch the expensive surprises while they are still cheap to fix, on paper, instead of in the field.
- Concept and programming, a few weeks
- Schematic design and design development, one to three months
- Construction documents, one to three months
Tip: the single best thing an owner can do to shorten the overall timeline is to make decisions early and stick to them. Late changes to layout, finishes, or program ripple through pricing, permitting, and long-lead orders all at once.
Entitlements and Permitting
Entitlements are the approvals that give you the right to build what you want, where you want it: zoning, platting, site plan review, variances, and any conditions a city or review board attaches. If the property is already zoned and platted for your use, this can be quick. If you need a rezoning or a variance, it can add months, because it runs on public meeting calendars you do not control.
Permitting is the next gate. The city reviews your construction documents for building code, fire, accessibility, and other requirements, then issues a building permit. Review times vary widely by jurisdiction and workload, and a first submittal that comes back with comments is normal, not a failure. Building the review-and-response loop into the schedule keeps it from feeling like a surprise.
- Simple by-right project with existing zoning, a few weeks to a couple of months
- Rezoning, platting, or variances, three to six months or more
- Building permit review, several weeks to a few months, depending on the city
Buyout and Mobilization
Once the drawings are permit-ready and a contract is in place, the contractor runs buyout: sending scopes to subcontractors and suppliers, comparing bids, and locking in the trade partners and prices that make up the real cost of the job. This is also when long-lead items get ordered. Certain equipment, structural steel, switchgear, storefront glass, and specialty finishes can carry lead times measured in months, and they often set the true start date for later phases.
Mobilization is the physical setup: fencing, the field office, temporary power and utilities, erosion control, and the first crews on site. Buyout and mobilization commonly overlap and together run a few weeks to a couple of months.
The Construction Sequence
This is the part most people picture when they think about building, but it is really a chain of dependent phases. Each one hands off to the next, and a slip early on tends to push everything behind it.
From the ground up
- Sitework: clearing, grading, underground utilities, and getting the pad ready
- Foundations: footings, slabs, and any deep foundation work the soils require
- Structure: steel, concrete, or wood framing that forms the skeleton of the building
- Envelope: roof, exterior walls, windows, and doors that make the building watertight, a milestone called dry-in
- MEP rough-in: mechanical, electrical, and plumbing systems run through the framing before walls close up
- Interior finishes: drywall, flooring, ceilings, casework, paint, and the fixtures that make it usable
Getting the building dried in is a turning point, because it lets interior trades work regardless of weather. Weather, incidentally, is one of the biggest wild cards on any exterior-heavy phase, and it is why prudent schedules carry some float rather than assuming perfect conditions.
As a rough guide, a straightforward one-story commercial building often runs six to ten months of field construction. Larger, taller, or more specialized buildings, such as medical or heavily processed spaces, take longer. A pure interior tenant improvement inside an existing shell can be as quick as one to four months, since the site, foundation, structure, and envelope are already there.
The schedule is not the enemy of quality. A realistic timeline, built from actual lead times and inspection windows, is what lets a crew do careful work without a last-minute scramble.
Inspections, Punch List, and Closeout
Inspections happen throughout construction, not just at the end. Cities inspect foundations before pours, framing and rough MEP before walls close, and life-safety systems as they are installed. Passing these along the way is what keeps the project legal to continue and prevents costly rework from hidden problems.
As the work wraps up, the team walks the building and builds a punch list: the small corrections, touch-ups, and unfinished items that stand between "almost done" and truly complete. Closeout also includes commissioning and testing of systems, final cleaning, and assembling the record documents, warranties, and operating manuals the owner will need.
The finish line is the certificate of occupancy, the CO. After final inspections confirm the building meets code and is safe to occupy, the city issues the CO and you can legally move in and open for business. Getting from substantial completion to a CO usually takes a few weeks, assuming inspections are scheduled promptly and the punch list is handled without delay.
- Punch list and corrections, one to three weeks
- Commissioning, testing, and final cleaning, a week or two, often overlapping
- Final inspections and certificate of occupancy, days to a few weeks
How Aghorn Interests Approaches This
We build the schedule the same way we build the budget: early, honestly, and from real numbers rather than optimism. During preconstruction we map the whole sequence, from permitting through the CO, and we flag the long-lead orders and approval milestones that tend to set the pace so nothing is a surprise three months in. You can read more about how we run a job on our how we build page.
Because we self-perform and directly supervise the early, dependency-heavy work, we keep tight control over the phases that dictate the rest of the calendar. Our site work and structure team gets the pad, foundations, and frame moving on schedule, which is exactly where a slip would otherwise push everything downstream. When you are ready to put real dates and a real number behind your project, reach out for a bid and we will build you a schedule you can plan and finance around.