In 2026, San Diego office tenant improvement typically runs $40-$330+ per square foot: a basic spec suite $40-$85/sq ft, mid-level creative office $85-$170/sq ft, and high-end headquarters or executive space $170-$330+/sq ft. Life-science and lab conversions - a large part of the San Diego market in Torrey Pines, UTC, and Sorrento Mesa - run far higher, often $250-$700+/sq ft because of mechanical, plumbing, and ventilation loads. Landlord TI allowances commonly offset $40-$110/sq ft of that.
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 San Diego ranges, per square foot of leased area.
| Office tier | $/sq ft | What it includes |
|---|---|---|
| Spec suite / basic refresh | $40-$85 | Paint, carpet, light reconfiguration, building-standard finishes. |
| Mid-level creative office | $85-$170 | Open plan, glass-front conference rooms, upgraded lighting, kitchen/cafe, branded moments. |
| High-end HQ / executive | $170-$330+ | Custom millwork, stone, statement reception, AV-heavy boardrooms, premium finishes. |
| Life-science / lab conversion | $250-$700+ | Lab MEP, fume hoods, redundant HVAC, backup power, specialized plumbing and gas. |
San Diego's office market is unusually shaped by life science. A standard creative-office number does not apply to a wet-lab build - those are mechanically intensive projects closer to laboratory construction than to office TI.
TI allowance vs. build cost
A tenant improvement allowance is money the landlord contributes toward building out the space, quoted per square foot. In San Diego, allowances commonly range from roughly $40-$110/sq ft for office (higher and more negotiable on longer leases and in competitive submarkets like Downtown, UTC, and Del Mar Heights). 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 San Diego
Office TI is faster to permit than restaurant or lab work, but still runs through the City of San Diego Development Services Department (DSD). 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 of San Diego DSD building permit; complexity rises with structural, MEP, or path-of-travel/accessibility upgrades.
- 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.
- Finish grade. The gap between a spec suite and an executive HQ is mostly finish and millwork.
- 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
Why is San Diego office TI sometimes so much more expensive than the office range?
Because a large share of San Diego "office" demand is actually life science. Converting space to wet lab adds fume hoods, redundant and high-capacity HVAC, specialized plumbing and lab gas, and often backup power - mechanical scope that can triple the per-square-foot cost versus a standard creative office. If you are leasing in Torrey Pines, UTC, or Sorrento Mesa, clarify early whether you are pricing office or lab.
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. Landlords give more when they can see exactly what is being built and that it improves the asset. A photoreal visualization of the planned space is a surprisingly effective negotiating tool.
Is San Diego office TI cheaper than Los Angeles?
For standard office, modestly - labor tends to run a little below LA. For lab and life-science work, San Diego is its own market and prices accordingly.
How much contingency should we carry?
8-12% of construction for a standard office TI; 12-18% for lab conversions or first-generation floors where hidden MEP and structural conditions surface during demo.