Signing a lease is just the beginning. Before your business can open its doors, the raw or outdated space you just committed to usually needs a serious transformation — and that transformation comes with real costs, timelines, and decisions that can make or break your budget.
What "Tenant Improvement & Build-Out" Actually Means
Tenant improvement (TI) refers to any modifications made to a commercial space to suit a specific tenant's needs. A build-out is the physical construction work involved — framing walls, installing ceilings, running electrical and plumbing, adding HVAC, and finishing surfaces.
These two terms are often used interchangeably, but they're slightly different: tenant improvement is the broader concept (including design, permits, and project management), while build-out is the hands-on construction phase.
What Does a Tenant Improvement Build-Out Cost?
Tenant improvement build-out cost varies enormously based on space condition, location, and finish level. Here are realistic ranges based on common project types:
- Cold dark shell (bare concrete, no utilities): $60–$120+ per square foot
- Warm vanilla shell (basic HVAC, electrical rough-in already done): $35–$75 per square foot
- Second-generation space (previous tenant left usable infrastructure): $20–$50 per square foot
- High-end office or medical build-out: $100–$200+ per square foot
- Restaurant build-out: $150–$300+ per square foot due to kitchen equipment, ventilation, and plumbing demands
A 3,000 sq ft office starting from a warm shell might cost $120,000–$225,000. A restaurant of the same size could easily run $450,000–$900,000.
Key Factors That Drive Cost Up or Down
Space Condition
The further your space is from "move-in ready," the higher your costs. A cold shell requires everything — from framing to fire suppression systems. Second-generation spaces with functional infrastructure can dramatically cut your budget.
Industry and Use Type
Restaurants, dental offices, medical clinics, and labs are consistently more expensive than standard offices or retail because they require specialized mechanical, plumbing, and electrical systems.
Geographic Location
Labor and material costs vary by market. A mid-tier build-out in Austin will cost significantly less than the same project in Manhattan or San Francisco.
Finish Level
Open-ceiling industrial finishes cost less than polished corporate environments with custom millwork, glass partition walls, and premium flooring.
The TI Allowance: What Landlords Actually Pay
Most commercial landlords offer a tenant improvement allowance (TIA) — a dollar amount per square foot they'll contribute toward your build-out. Typical ranges:
- Class A office space: $40–$80 per sq ft
- Class B office: $20–$50 per sq ft
- Retail: $10–$40 per sq ft
The catch: TI allowances rarely cover the full cost of a build-out, especially for specialized uses. The gap is your responsibility. Some landlords structure allowances as reimbursements after work is complete, which means you need upfront capital.
Always negotiate TI allowance amounts, delivery conditions, and approval rights over contractors before signing the lease.
Step-by-Step: How a Commercial Build-Out Works
- Lease execution – Finalize TI allowance terms, landlord-approved contractor lists, and timeline expectations.
- Design and space planning – Work with an architect or interior designer to produce construction documents. Budget $3–$8 per sq ft for this phase.
- Permitting – Submit plans to the local building department. Timelines range from 2 weeks to 3+ months depending on jurisdiction.
- Contractor selection – Solicit bids from at least 3 licensed general contractors experienced in commercial TI work. Compare scope, not just price.
- Construction – Typical office build-outs take 6–14 weeks. Restaurants and medical spaces often run 3–6 months.
- Inspections and certificate of occupancy – Required before you can legally operate.
Landlord vs. Tenant Build: Who Manages the Work?
There are two common structures:
- Turnkey build-out: The landlord manages and pays for construction up to an agreed spec. You get a finished space but have less control over quality and timeline.
- Tenant-managed build-out: You hire and oversee the contractor directly, using the TI allowance as reimbursement. More control, but more responsibility.
For complex or highly customized spaces, tenant-managed builds typically produce better results — if you have the bandwidth to manage the process.
Finding the Right Contractor Matters More Than You Think
A low bid from an inexperienced contractor can turn into cost overruns, failed inspections, and delayed openings. Vet contractors on their commercial TI track record, licensing, insurance, and references from similar project types. Mercoly makes it easy to compare and find trusted tenant improvement build-out providers in one place, so you're not starting from scratch.
Start comparing qualified build-out contractors today and protect your timeline, your budget, and your lease.