In 2026, Orange County office tenant improvement typically runs $40-$350+ per square foot: a basic spec suite $40-$90/sq ft, mid-level creative office $90-$175/sq ft, and high-end headquarters or executive space $175-$350+/sq ft. Pricing tracks Los Angeles closely. Premium office markets - Newport Center / Fashion Island, the Irvine Spectrum, and Park Place - sit at the top of the range. Landlord TI allowances commonly offset $40-$120/sq ft.
Cost by office tier
Office TI cost is driven by how much of the floor is open work versus built rooms, the finish grade, and how much custom millwork and AV is involved. These are realistic 2026 Orange County ranges, per square foot of leased area.
| Office tier | $/sq ft | What it includes |
|---|---|---|
| Spec suite / basic refresh | $40-$90 | Paint, carpet, light reconfiguration, building-standard finishes. |
| Mid-level creative office | $90-$175 | Open plan, glass-front conference rooms, upgraded lighting, kitchen/cafe, branded moments. |
| High-end HQ / executive | $175-$350+ | Custom millwork, stone, statement reception, AV-heavy boardrooms, premium finishes. |
Orange County has a deep base of corporate, finance, and professional-services tenants, so well-built creative and executive office is the dominant TI type. The county's Class-A towers in Newport Center, Irvine, and Costa Mesa set a high finish bar.
TI allowance vs. build cost
A tenant improvement allowance is money the landlord contributes toward building out the space, quoted per square foot. In Orange County, allowances commonly range from roughly $40-$120/sq ft for office, higher and more negotiable on longer leases and in competitive Class-A submarkets. Anything above the allowance is tenant out-of-pocket, so the spread between your build cost and the allowance is the number to model from day one.
- Longer lease term = larger allowance. A 7-10 year lease unlocks more TI than a 3-year deal.
- Turnkey vs. allowance. Some landlords build to your plans (turnkey); others hand you a per-foot allowance and let you manage the build. Each shifts cost risk differently.
- Amortized TI. Landlords will sometimes fund over-allowance work and amortize it into rent - convenient, but it is financing, and it has a rate.
Permits & timeline in Orange County
Office TI is faster to permit than restaurant work, but the building permit is issued by the city the space sits in - Irvine, Newport Beach, Costa Mesa, Santa Ana, Anaheim - each with its own building department and plan-check turnaround. Plan on 4-9 months end to end:
- Design & construction documents - 4-8 weeks. Test fit, space plan, finishes, MEP coordination, permit set.
- Permitting - 4-10 weeks. City building permit; complexity rises with structural, MEP, or path-of-travel/accessibility upgrades. Plan-check speed varies city to city.
- Construction - 8-16 weeks. Faster in buildings with recent spec suites; longer on first-generation raw floors and heavy MEP.
What drives cost up - or down
- Open vs. enclosed. Walls, doors, and glass fronts cost money. A more open plan is cheaper per square foot than many private offices.
- MEP & HVAC. Re-zoning HVAC, adding supplemental cooling for server/IT rooms, and electrical upgrades are major swing items.
- Millwork & AV. Custom reception, casework, and AV-heavy boardrooms carry the highest cost per square foot.
- Building class and city. Class-A towers in Newport Center or Irvine carry higher finish expectations; plan-check pace varies by city.
- Change orders. Walking the office in VR with leadership, brand, and HR before construction documents are issued collapses the gap between what the team imagines and what gets built - which is where post-move-in change orders and re-work come from. Pre-lease visualization also strengthens your hand negotiating the TI allowance.
Common follow-up questions
Is Orange County office TI cheaper than Los Angeles?
Not meaningfully. Orange County labor and GC pricing track LA closely, and the Class-A markets in Newport Center and Irvine can run at the top of the range on finish grade. Equipment, millwork, and AV are national-market costs.
Does the city change the timeline?
Yes. Because each Orange County city runs its own building department, plan-check turnaround varies - Irvine, Newport Beach, and Costa Mesa each have their own pace and standards. It rarely changes hard cost per square foot dramatically, but it changes how long you carry rent before move-in.
How do I get a bigger TI allowance?
Commit to a longer term, negotiate in a softer submarket, and come to the table with a clear, costed plan. A photoreal visualization of the planned space helps the landlord see exactly what is being built and that it improves the asset.
How much contingency should we carry?
8-12% of construction for a standard office TI; higher on first-generation floors where hidden MEP and structural conditions surface during demo. Resolving the design in 3D up front is the most effective way to shrink change-order risk.