The single most common surprise businesses encounter when they decide to build rather than lease has nothing to do with cost. It’s the calendar.

Owners tend to anchor on the construction phase, because that’s the part you can see. Steel goes up, walls close in, and the building takes shape over a period of months that feels reasonably predictable. What catches people off guard is everything on either side of that, and how much of the total timeline lives in phases where nothing visible is happening at all.

Here’s what a realistic schedule looks like for a ground-up commercial project in the Treasure Valley, and where the time actually goes.

Phase One: Site Selection and Due Diligence

Typical range: 1 to 4 months

This phase moves as fast as your decision-making does, which is why it varies so widely. Finding a site that fits your operational requirements, your budget, and your timeline is the easy part conceptually and the slow part in practice.

Due diligence is where the schedule risk hides. Title work, survey, geotechnical investigation, environmental assessment, utility availability confirmation, and a preliminary look at what the zoning actually permits all need to happen before you’re committed. Skipping any of it to save a few weeks routinely costs months later when something surfaces that should have been caught early.

The most common delay in this phase is discovering that the intended use requires an entitlement action nobody anticipated.

Phase Two: Entitlements and Approvals

Typical range: 3 to 18 months, occasionally longer

This is the widest variance in the entire process and the phase most likely to blow up a schedule.

If your project is a permitted use in the existing zone and conforms to the comprehensive plan, you may move through administratively in a few months. If it requires a conditional use permit, a rezone, a comprehensive plan amendment, annexation, or a planned unit development application, you’re looking at public hearings, published notice periods, and a schedule dictated by how often the relevant commission meets.

Each jurisdiction in the valley operates differently. Staffing levels, submittal requirements, review cycles, and appetite for a given use all vary between Boise, Meridian, Nampa, Eagle, Caldwell, Star, and Kuna, and they vary over time within each one. Two identical projects on identical sites in different cities can sit twelve months apart on the calendar purely because of where they landed.

Traffic studies, if required, run in parallel here and can trigger their own conditions of approval. So can ACHD coordination on access and right-of-way dedication.

The practical takeaway is that entitlement experience in the specific jurisdiction matters more than almost any other variable. Knowing what a city wants to see in a submittal before the first comment letter arrives compresses this phase more than anything else you can control.

Phase Three: Design and Construction Documents

Typical range: 3 to 8 months

Schematic design, design development, and construction documents proceed in sequence, with structural, mechanical, electrical, plumbing, civil, and landscape consultants coordinating throughout.

This phase overlaps partially with entitlements on well-run projects, which is one of the meaningful advantages of an integrated team. When the design and construction groups work inside the same organization, constructability problems get caught while they’re still drawings rather than after they’re in the field. Budget tracking is continuous rather than a series of unwelcome surprises at each milestone.

Design complexity drives the range. A straightforward shell building with tenant improvements to follow moves faster than a highly specialized facility with clinical, industrial, or food service requirements built in from the start.

Phase Four: Permitting

Typical range: 2 to 6 months

Building permit review has lengthened across most Treasure Valley jurisdictions as volume has increased. Plan review typically involves multiple departments running in parallel, and any one of them can generate comments requiring a resubmittal, which restarts portions of the clock.

Fire, health district, ACHD, and utility provider approvals may run alongside the building department review depending on the project. Impact fees are assessed and typically must be paid before permits issue.

Phase Five: Construction

Typical range: 6 to 18 months

The visible phase, and the one businesses generally estimate most accurately.

Duration depends on size, complexity, and building type. A single-tenant retail pad or small office building can be complete in six to nine months. A larger multi-tenant building, a medical facility, or anything with significant specialty systems runs longer.

Idaho weather affects the schedule less than most people assume, because contractors here plan around it. Winter concrete work is routine with proper precautions. What actually drives schedule risk is long-lead equipment, particularly electrical gear, mechanical units, and anything with specialized fabrication. Lead times on some of that equipment remain considerably longer than they were five years ago, and ordering late is one of the few mistakes that cannot be recovered from.

Phase Six: Closeout, Inspections, and Occupancy

Typical range: 1 to 3 months

Final inspections, fire marshal sign-off, health department approval where applicable, certificate of occupancy, and punch list completion. Furniture, fixtures, equipment installation, and IT infrastructure typically happen in this window.

Businesses in regulated industries should build in additional time here. A medical facility, commercial kitchen, or childcare center has licensing and inspection requirements beyond the standard building process, and those agencies operate on their own schedules.

Adding It Up

For a ground-up commercial project in the Treasure Valley, a realistic total from initial site search to opening day is generally 18 to 36 months, with the wide range driven almost entirely by entitlement complexity.

Projects that are permitted by right in existing zoning on a serviced site can land near the low end. Projects requiring rezone, annexation, or comprehensive plan amendment routinely land near the high end or beyond.

What This Means for Planning

The practical implication is that the real estate decision needs to start well before the deadline that’s driving it.

If a lease expires in eighteen months and building is under consideration, the conversation should be happening now, not in six months. If an expansion is tied to a business milestone, the milestone should be set against a realistic construction schedule rather than an optimistic one.

The most useful thing a business can do early is get a candid read on the entitlement path for the specific site and the specific use. That single variable accounts for most of the difference between an eighteen-month project and a thirty-six-month one, and it can usually be assessed in a matter of weeks.

At Ahlquist, our development team and commercial construction group evaluate the full schedule picture on every project, including the parts that are easiest to underestimate. If you’re weighing a build against a lease renewal, we’re glad to talk through what a realistic timeline looks like for your situation. You can also browse our available properties if the schedule points toward leasing instead.