You’ve signed the lease — or you’re close to it. The space is raw, or it’s someone else’s old buildout, or it’s somewhere in between. Now comes the part that most first-time commercial tenants find equal parts exciting and overwhelming: turning that shell into a functioning restaurant, boutique, salon, office, or retail shop.
This guide covers what tenant improvements cost in the current Arizona market, how permitting works, and what to look for in a general contractor who actually understands small business needs.
What Are Tenant Improvements?
Tenant improvements — also called TI, leasehold improvements, or a commercial buildout — refer to the construction work done to customize a commercial space for a specific tenant’s use. This can range from light cosmetic work (paint, flooring, new lighting) to a complete gut renovation involving new plumbing, electrical, HVAC, framing, and specialized systems like commercial kitchen exhaust or medical gas lines.
The Tenant Improvement Allowance
Many commercial leases include a tenant improvement allowance (TIA) — a dollar amount the landlord contributes toward your buildout, typically expressed as a dollar-per-square-foot amount. A few things worth knowing before you negotiate:
- Get the allowance terms in writing. What does it cover? When is it paid out — during construction or after?
- Know whether the landlord requires approved contractors. Some landlords require written approval for any contractor you select.
- Understand what happens to unused allowance. In some leases it reverts to the landlord; in others it can be applied to rent abatement.
- Your build-out estimate is a negotiating tool. A detailed estimate from a licensed GC before you finalize the lease gives you solid ground to negotiate a higher allowance or longer free-rent period.
What Does a Commercial Buildout Cost in Arizona in 2026?
| Build-Out Type | Cost per Square Foot | Typical Use |
|---|---|---|
| Light office TI | $60 – $90/SF | Paint, flooring, basic lighting, minor MEP work |
| Standard retail / office | $90 – $140/SF | New walls, ceilings, MEP modifications, ADA upgrades |
| Restaurant / medical | $140 – $220+/SF | Commercial kitchen, hood systems, specialized HVAC, fire suppression |
Solid State Construction’s minimum for tenant improvement work is $85 per square foot. In practical terms: a 1,000 SF standard retail or office buildout runs $90,000–$140,000. A 2,000 SF project at the same tier runs $180,000–$280,000. Restaurant and medical spaces will be at the higher end regardless of size.
Common Small Business Buildout Types
Restaurant and Food Service
Restaurant buildouts are the most complex and expensive category of tenant improvement. The major cost drivers are:
- Commercial kitchen systems: Type I hood exhaust, make-up air, fire suppression (Ansul system), and commercial ventilation are required by code.
- Grease interceptors: Required for any food service operation using fryers. Installation in slab-on-grade construction involves concrete cutting and plumbing rough-in.
- Health department plan check: In Maricopa County, restaurant buildouts require review and approval from the Maricopa County Environmental Services Department — separate from the city building permit.
- Floor drains and commercial plumbing: Commercial kitchens require multiple floor drains, a three-compartment sink, a hand-wash sink, and adequate hot water capacity.
Retail Boutiques and Shops
Boutique retail buildouts require a high finish level. Common elements include:
- Custom shelving, display walls, and millwork
- Upgraded LED lighting systems (track, recessed, accent)
- Premium flooring (LVP, tile, or polished concrete)
- Fitting rooms with proper electrical
- POS counter / cash wrap area
- ADA-compliant restroom upgrades if required
Salon and Spa Buildouts
Salon buildouts introduce plumbing complexity — shampoo bowls, color stations, and nail areas all require dedicated water supply and drain lines. HVAC ventilation requirements for nail salons also have specific code requirements in Arizona.
Permitting Tenant Improvements in Arizona
Any tenant improvement that touches structural systems, plumbing, electrical, or mechanical systems requires city building permits. Each municipality in Arizona has its own building department, though all follow the International Building Code (IBC).
- You’ll likely need architectural drawings. Commercial TIs in most Arizona cities require plans prepared or stamped by a licensed architect or engineer.
- Plan review takes time. Standard commercial plan review takes two to six weeks. Factor this into your timeline before your lease commencement date.
- Multiple inspections are required. Framing, rough plumbing, rough electrical, mechanical, and final inspections are all separate events.
- Certificate of Occupancy (CO) is required before opening. You cannot legally open until the city issues a CO.
- Budget a 5–15% contingency. Older commercial buildings frequently have hidden conditions — buried plumbing, unexpected electrical, asbestos — that appear during demolition.
How to Choose a Tenant Improvement Contractor
- Verify their ROC license at azroc.gov before signing anything.
- Look for relevant commercial experience — not just residential remodels. Ask for examples of comparable commercial projects.
- Get a detailed, itemized estimate — scope, exclusions, allowances, and payment schedule clearly defined.
- Ask about their subcontractor relationships — established subs for plumbing, electrical, HVAC, and fire suppression keep your project moving.
- Understand their communication style — your opening date and cash flow hang in the balance. Responsiveness matters.
- Clarify change order procedures upfront. In commercial construction, changes happen. Know how they’re documented, priced, and approved.
Why Solid State Construction Works Well for Small Business Owners
Solid State Construction is a licensed general contractor (ROC KB-1 #344966) based in Gilbert, Arizona, serving clients across all of Arizona. Family-owned and minority-owned, we’ve completed commercial tenant improvement projects including restaurant-adjacent commercial spaces and small business buildouts.
As an owner-operated firm, we offer what large commercial GCs often can’t: direct access to ownership, genuine accountability, and the flexibility to work constructively with small business owners navigating their first commercial buildout. You’re not a line item in someone’s project queue — you’re a client who matters to the business.
Planning a commercial buildout in Arizona? Call Solid State Construction at (480) 900-0921 or visit solidstateconstructionaz.com/get-a-quote to schedule a free consultation.