Commercial build-out costs in Johnson County: what actually drives the number.
Two spaces, same size, same street. One costs a little paint and carpet to open. The other needs six figures before you serve your first customer. The rent listing won't tell you which one you're looking at. This guide will help you see the difference.
I'm a REALTOR® in the Iowa City and Cedar Rapids areas, and I also own a construction company and run site work crews. I've priced and built the kinds of projects this article covers, which is exactly why I won't hand you one magic number per square foot. Build-out cost is a range that swings wildly with the condition of the space and what your business needs. What I can do is show you what drives the number, so you can spot an expensive space before you fall in love with it.
First question: what are you starting from?
The single biggest cost factor is the condition of the space on day one:
- Second-generation space, a previous tenant did your kind of business here. A restaurant taking over a restaurant inherits hoods, grease traps, and plumbing. This is the cheapest way to open, if the equipment's condition checks out.
- White box / vanilla shell, walls, ceiling, HVAC, lighting, and basic electrical exist; you add finishes and trade-specific work. The middle of the range.
- Cold / grey shell. Bare concrete, stubbed utilities, maybe no HVAC distribution at all. The lowest rent per square foot, and the most expensive to open. This is where first-timers get hurt: the cheap listing is cheap for a reason.
What your use adds.
As a rough rule of thumb, and these are national rules of thumb, not quotes; every space is different, a light office refresh is the low end of the range, a full office or retail build-out from a shell costs several times that, and restaurants sit at the top of the market, often multiples of a comparable retail build-out. Why:
- Office: mostly walls, flooring, lighting, data. Costs climb with private offices and conference rooms, because walls mean electrical, HVAC rebalancing, and sometimes sprinkler head moves.
- Retail: finishes plus storefront work, display lighting, and signage. A restroom you're required to add can surprise you. Plumbing runs across a slab are not cheap.
- Restaurant / food service: hood systems, grease interceptors, floor drains, heavy electrical and gas service, walk-ins, and health department requirements. This is why second-generation restaurant space commands a premium, the expensive parts already exist.
- Clinic / personal services: plumbing count is the driver, every sink, wash station, or exam room adds runs.
The line items nobody budgets for.
- HVAC capacity: the existing rooftop unit may be too small, or dead. Replacing one is a five-figure line item that shows up in year one either way, so we check age and tonnage on the tour.
- ADA compliance: triggered by your renovation. Restroom clearances, ramps, door hardware, counter heights.
- Permits and plan review: Iowa City, Cedar Rapids, and surrounding areas each run their own permitting; commercial work generally needs stamped drawings. Budget time as well as money. Plan review adds weeks, not days.
- Sprinklers and fire alarm: changing walls or occupancy type can trigger system changes.
- Utility upgrades: a shell space with 100-amp service doesn't run a kitchen. Panel and service upgrades involve the utility, not just your electrician.
- Signage: sign codes differ by city and by shopping center. The sign you sketched may not be the sign you're allowed.
Who pays for it.
Not necessarily all you. Three levers get negotiated before you sign, and they're worth more than a lower rent rate in most first-timer deals:
- Tenant improvement (TI) allowance: the landlord contributes a set amount per square foot toward your build-out, usually in exchange for a longer term.
- Landlord's work letter: the landlord delivers the space in a defined condition. New HVAC, demised walls, restroom in place, before your build-out starts. Getting the definition in writing is the whole game.
- Free rent / abatement: months of free rent while you build, so you're not paying for a space you can't open.
These levers are exactly why you want representation on your side of the table, and in most corridor deals, tenant representation costs you nothing, because the fee is paid on the landlord's side.
How to get a real number before you sign.
Walk it with someone who builds
Before the LOI, not after. I read the HVAC, electrical service, plumbing locations, slab, and ceiling on the first tour, and give you a realistic cost-to-open range for how your business would use the space.
Get the landlord's scope in writing
"Landlord will deliver in white box condition" means nothing until the work letter defines it. We pin down exactly what exists on day one.
Price the gap, then negotiate it
The distance between delivered condition and your opening day is the real number. That's what the TI allowance, free rent period, and rate all get negotiated against.
Keep a contingency
Concrete slabs and old buildings keep secrets. A healthy contingency on top of the estimate isn't pessimism. It's how you stay open through the surprise.
New to commercial space entirely? Start with the companion guide: commercial real estate in Iowa City, a first-timer's guide to leasing or buying.
Have a space in mind?
Send me the listing and I'll walk it with you, with a builder's eye on what it would actually cost to open your doors. Free conversation, no commitment.