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Different Types of Tenant Improvements

Not every tenant improvement is the same project. From first-generation shell space to a full-gut renovation, the type of TI you’re building determines the trades, the timeline, and the budget.

First-Generation vs. Second-Generation Space

The most basic distinction in tenant improvement work is whether a space has been occupied before. First-Generation TI is space being built out for its first occupant in new developments — often starting from shell space with unfinished interiors requiring comprehensive infrastructure installation. Second-Generation TI is space previously occupied and improved by another tenant, where existing walls, ceilings, and systems may or may not be reusable for the new layout. A white-box or vanilla-shell space sits in between — partially finished with basic systems but still requiring tenant customization.

Common Types of Tenant Improvement Projects

There are more than 20 recognized categories of tenant improvement — here are eight of the most common.

Office TI

Environments for corporate workspaces, law firms, and professional services.

Retail TI

Storefronts emphasizing customer experience, displays, and merchandising.

Restaurant TI

Commercial kitchens with specialized plumbing, ventilation, and fire systems.

Medical / Healthcare TI

Treatment facilities requiring specialized utilities and accessibility features.

Industrial TI

Production and warehouse operations with equipment infrastructure.

Warehouse / Distribution TI

Modern logistics facilities with technology and automation systems.

Adaptive Reuse TI

Converting buildings to substantially different commercial purposes — warehouses into offices, banks into restaurants.

Occupied-Space TI

Renovations occurring while the business remains open and operational.

Cosmetic Refresh vs. Full-Gut Reconstruction

TI projects also vary by scope of work, not just use. A Cosmetic TI is a refresh involving paint, flooring, lighting, and minor modifications — fast and inexpensive. A Full-Gut TI is complete interior reconstruction, removing most previous improvements down to the shell. A Building-System TI sits between them, prioritizing mechanical, electrical, and plumbing upgrades over finishes, and a Sustainable/Energy-Efficient TI emphasizes LED lighting, HVAC efficiency, and performance standards regardless of scope.

Specialized Space Types

Some tenant improvements are defined by unique infrastructure needs rather than industry. Technology/Data-Intensive TI requires robust power, network, and cooling infrastructure. Fitness/Wellness TI needs specialized flooring, ventilation, and facility systems. Hospitality TI — hotels and guest-facing environments — introduces phased construction challenges around occupied guest areas. Professional Services TI for law, accounting, and consulting firms balances private offices with collaborative space.

Why the Type of TI Changes Everything

The type of tenant improvement drives which trades are involved, how long permitting takes, and what the budget needs to cover.

A restaurant build-out and an office build-out of the same square footage can have wildly different costs, because kitchen plumbing, ventilation, and fire suppression add complexity an office never touches. Knowing your project type early helps set a realistic budget and schedule from day one.

Matching the Contractor to the TI Type

Not every contractor is equally comfortable across all 20+ types of tenant improvement. Medical and restaurant TIs demand specialized code knowledge; adaptive reuse demands experience with older buildings and unpredictable existing conditions. Identifying your project type early helps match the right team, trades, and permitting strategy to the work.

One Contractor, Every Type of Tenant Improvement

Whatever type of tenant improvement you’re planning, a commercial space still takes a general contractor, an architect, and specialty trades coordinating on one schedule and one budget.

Project Classification

We identify your project's type and scope during the initial walkthrough, before pricing begins.

Specialized Trades

From restaurant kitchens to medical suites, we bring the right specialty trades to each TI type.

Code & Permitting

Different TI types trigger different code and permitting requirements — we manage that complexity.

Documented Closeout

Every project type closes out with the inspections, warranties and documentation it specifically requires.

Bay Area Tenant Improvement Coverage

Tenant Improvement Licensed Contractors serves commercial clients throughout the San Francisco Bay Area — from San Francisco and Oakland to San Jose, the Peninsula, the East Bay and the North Bay.

Types of Tenant Improvement FAQs

What's the difference between first-generation and second-generation TI?

First-generation space is being built out for its first occupant, often from a shell. Second-generation space was previously occupied and improved by another tenant — existing improvements may or may not be reusable.

What is a white-box or vanilla-shell space?

It’s a partially finished space with basic systems in place — like restrooms and HVAC — but still requiring tenant-specific build-out before it’s usable.

Are restaurant and medical TIs more expensive than office TIs?

Usually, yes. Specialized plumbing, ventilation, fire systems and accessibility requirements add cost and complexity that a standard office build-out doesn’t have.

What is adaptive reuse in tenant improvement?

Adaptive reuse converts a building to a substantially different commercial purpose — a warehouse becoming offices, or a former bank becoming a restaurant — and typically requires more due diligence on existing conditions.

Can construction happen while my business stays open?

Yes — occupied-space TI is common, but it requires careful planning around dust control, noise, deliveries, and working hours to avoid disrupting operations.

How do I know which type of TI my project is?

Most projects combine categories — for example, a second-generation, occupied-space, cosmetic TI for an office tenant. We help identify the right classification during the initial site walkthrough.