How long does it take to build out a restaurant?

Permitting a brand-new restaurant build-out commonly takes 6 to 18 months, with construction itself running roughly 18–26 weeks. A turnkey restaurant or a second-generation space — where the hood, grease trap, and permits already exist — can get you open in a fraction of that, sometimes under 90 days.

How much does a commercial grease trap cost?

An exterior grease trap or interceptor often requires excavation and typically costs $8,000 to $25,000 depending on size and site conditions, and it's expensive to upsize. Permitting a new grease trap and hood together commonly adds 4 to 12 weeks to a project.

What delays a restaurant opening the most?

The three most common delays in the final month are the grease-trap inspection, hood-suppression commissioning, and the final health inspection. Earlier, the biggest schedule killer is permit plan review — especially running health-department and building reviews one after another instead of in parallel.

How much does restaurant kitchen ventilation cost?

Commercial kitchen ventilation and HVAC for a full build-out commonly runs $75,000 to $250,000, and can exceed $300,000 for larger operations. In a remodel, existing ductwork may not support the Type I hood your kitchen needs, adding cost and delay.

How do I avoid restaurant build-out delays?

The surest ways are to buy a turnkey restaurant or lease a second-generation space — both already have the hood, grease trap, gas line, and permits that cause most delays. If you must build, run health and building plan reviews in parallel, verify utility capacity before signing, and order long-lead equipment early.

The Restaurant Build-Out Trap: Hidden Delays That Drain Your Savings

Ask a first-time restaurateur what they're worried about and they'll say the menu, the concept, the dining room. Ask someone who has actually opened a place and they'll tell you the truth: the thing that blows your opening date — and quietly drains your savings — isn't any of that. It's a grease trap in the parking lot, a hood that won't vent, and a permit stuck in "plan review" while the rent clock runs. Here are the hidden delays that trap restaurant build-outs, some real stories of how bad it gets, and the two ways experienced operators skip almost all of it.

One important caveat first: every jurisdiction is different. Grease-trap sizing, hood and ventilation rules, permit timelines, and inspection processes all vary by town, county, and state. The figures below are typical ranges, not universal rules — always confirm the specifics with your local permitting office and health department before you sign a lease or budget a build-out. A quick call to the town early can save you months later.

The Grease Trap That Holds Everything Hostage

It's the least glamorous thing in the building and one of the most likely to wreck your schedule. An exterior grease trap (or interceptor) often requires excavation and can run $8,000 to $25,000 depending on size and site conditions — and that's before the city signs off on the sizing and location. In one common horror story, an owner's grease-trap drawings had to be resubmitted after crews hit electrical and water pipes underground, forcing the whole unit to be repositioned to the front of the building — a change that burned through their entire eight-month free-rent period. Permitting a new grease trap and hood together commonly adds 4 to 12 weeks to a project, sometimes more.

A second-generation space already has a correctly sized, approved grease trap in the ground — you inherit it instead of digging.

The Hood That Won't Vent

Commercial kitchen ventilation is both a major cost and a major delay. A full build-out's ventilation and HVAC commonly runs $75,000 to $250,000, and for larger operations can top $300,000. Worse, in a remodel the existing ductwork paths may not support the Type I hood your cooking line needs, or a shared building system may cap what equipment you can install. And "hood suppression commissioning" is one of the three most common delays in the final 30 days before opening — right alongside the grease-trap inspection and the final health inspection.

A second-gen restaurant space already has a Type I hood, make-up air, and fire suppression sized for a real kitchen.

The Permit Gauntlet

Permitting a brand-new restaurant build-out can take 6 to 18 months. One of the most common four-to-eight-week schedule misses is simply running health-department plan review and building plan review one after the other instead of in parallel. Then come the inspections you can't open without — rough-in, final mechanical, fire suppression, and health — and if any one fails, you wait for the next available re-inspection slot. A Washington, DC restaurant converting a former retail space in Shaw didn't get its permit until 22 weeks in, after 14 review comments across three disciplines, with each response cycle taking three weeks.

The Rent Clock That Doesn't Wait

Here's the part that turns delay into disaster: most leases have a rent-commencement clause that starts the rent regardless of permit or construction delays. That same DC operator paid five months of rent on a space they couldn't open. Multiply an empty shell by five, eight, twelve months and you've spent your working capital before you've served a single plate — the exact money you needed to survive the slow first months after opening.

When It Goes Really Wrong

Even doing everything right doesn't guarantee safety, because the rules can move under you. In Portland, Café Nell owner Vanessa Preston reportedly spent around $2 million and three years of appeals building out permitted outdoor dining — only to be hit in 2025 with a civil penalty ordering her to tear parts of it down and warning that her parking-lot dining room violated her use permit. It's an extreme case, but the lesson isn't: build-outs put enormous money and time at the mercy of a permitting process you don't control.

The Surprises Hiding in the Walls

Older buildings love to surprise you. Open up the walls and ceilings and you can find century-old structural conditions that aren't remotely up to today's code. Layer on ADA compliance — accessible routes, restroom facilities, service-counter heights, and egress paths — plus utility capacity (does the gas line's BTU load actually support your equipment? does the electrical service need an upgrade on the utility company's timeline, not yours?), and the "quick remodel" quietly becomes a gut renovation.

The Shortcut Smart Operators Use

Once you've lived through one build-out, you rarely do it from scratch again. There are two ways to skip almost the entire gauntlet above:

Buy a turnkey restaurant. An operating business comes with the build-out done, the permits in place, the equipment installed, and — often — revenue from day one. You can be open in weeks, not months. Browse restaurants for sale, and if you're new to the process, start with How to Buy a Restaurant.
Lease a second-generation space. A "second-gen" space previously operated as a restaurant, so the hood, grease trap, gas, and plumbing — the exact things that cause every delay in this article — are already there. That's why a second-gen space can get you open in a fraction of the time of a raw "vanilla shell." Browse restaurant spaces for lease, and negotiate the lease carefully (these terms matter most).

Building from scratch can be the right call for a very specific concept in a specific location. But for most operators, the fastest, lowest-risk path into a restaurant is one where the grease trap is already in the ground and the hood is already on the roof.

Skip the Build-Out

Don't spend a year and your savings fighting a permit office. Browse turnkey restaurants for sale and second-generation spaces for lease on ListingLedge — filter by market and budget, see what's already built and permitted, and contact owners or brokers directly.