A strong contractor portfolio tells you everything about quality, scope, and reliability before you sign a contract. Reviewing build-out work is different from evaluating general construction—you need to spot experience with the specific demands of commercial space transformation. Here's what matters when you're assessing TI contractor portfolios.
Project Scope and Complexity
Look at the scale and type of projects listed. Did they handle a 2,000-square-foot retail refresh or a 50,000-square-foot multi-floor office renovation? TI work ranges wildly in complexity. A contractor experienced with simple cosmetic updates may struggle with full mechanical, electrical, and plumbing (MEP) coordination in a larger space.
Check whether their portfolio includes the kind of tenant improvement you need. Medical offices have different compliance requirements than restaurants. Retail has different utility demands than warehouses. If a contractor's past work is mostly small office suites but you're doing a ground-floor restaurant build-out with hood systems and grease traps, that's a red flag.
Timeline and Schedule Compliance
Ask for specific timelines from portfolio projects—not just the end date, but the actual duration and whether they stayed on schedule. TI projects often cost $50–$200+ per square foot depending on finish quality and mechanical complexity, but hidden delays push those numbers higher fast.
Request references where projects stayed within the promised timeline. Did they finish a 10,000-square-foot build-out in 12 weeks as planned, or did it stretch to six months? Delays in TI work ripple directly into your move-in date and revenue loss, so track record matters enormously.
Quality of Finishes and Attention to Detail
Look at close-up photos in portfolios, not just wide shots of finished spaces. Examine:
- Drywall seams and paint quality — Are transitions smooth and edges clean, or do you see visible tape lines and inconsistent texture?
- Flooring installation — Check for gaps, uneven seams, or lippage (height differences between tiles).
- Millwork and casework — Doors should close evenly, and built-ins should sit flush against walls.
- Lighting and electrical placement — Are outlets and switches logically positioned and symmetrically placed where it matters?
Low-quality finishes often cost less upfront but age poorly and require touch-ups within months. Premium work costs 15–25% more but lasts and looks professional through your tenant's lease.
MEP Coordination and Code Compliance
Tenant improvement isn't just drywall and paint. The best portfolios show evidence of coordination with mechanical, electrical, and plumbing trades. Look for:
- Projects where HVAC systems are visibly updated or integrated.
- Electrical systems that appear to match the space's actual needs (data centers vs. standard office).
- Plumbing work if the project required restroom, kitchen, or utility updates.
Ask directly whether the contractor pulls permits and manages inspections themselves or passes that responsibility to you. A contractor who handles all code compliance saves you significant headaches. Typical TI projects require 4–8 inspection touchpoints from permit pull through final sign-off.
Before-and-After Documentation
The strongest portfolios show clear before-and-after sequences. This reveals how much structural transformation occurred and demonstrates the contractor's ability to work within existing building constraints. A space that went from gutted shell to fully finished tells a different story than cosmetic refresh work.
If before photos show significant damage, mold, structural issues, or dated infrastructure, that reveals the contractor's capacity to handle problem spaces—valuable if your lease space needs it.
References and Verifiable Details
Portfolio photos are curated. Always request 2–3 direct references from similar-scope projects completed in the past 18–24 months. Call them and ask:
- Did the contractor communicate proactively about changes or problems?
- Did they stay on budget, or did change orders accumulate?
- Would you hire them again?
Mercoly helps you compare and find trusted Tenant Improvement & Build-Out providers in one place, making it easier to review multiple portfolios side-by-side and connect with contractors who fit your project.
Frequently Asked Questions
Q: What should a TI contractor's portfolio timeline look like for a 5,000-square-foot office? Most quality build-outs of that size take 8–14 weeks depending on MEP scope and finish level. If a contractor shows multiple projects completed in 4 weeks, dig deeper—they may be cutting corners or those were simpler cosmetic updates.
Q: How can I tell if a contractor is experienced with my building type? Ask specifically for 3–5 portfolio projects in your exact category (retail, medical, restaurant, etc.) completed within the last two years. Different building types have different code requirements and technical demands.
Q: Should I worry if a portfolio project went over budget? Small overruns (5–10%) are common and often justified by unforeseen conditions. Anything above 15% warrants a conversation about what caused it and how the contractor manages change orders.
Start comparing TI contractor portfolios today on Mercoly to find the right fit for your project.